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NCP3064, NCP3064B, NCV3064 1.5 A, Step-Up/Down/ Inverting Switching Regulator with ON/OFF Function
The NCP3064 Series is a higher frequency upgrade to the popular MC33063A and MC34063A monolithic DC-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. The ON/OFF pin provides a low power shutdown mode.
Features
http://onsemi.com MARKING DIAGRAMS
3064x ALYWG G 1
8 1
SOIC-8 D SUFFIX CASE 751
* * * * * * * * * * *
Input Voltage Range from 3.0 V to 40 V Logic Level Shutdown Capability Low Power Standby Mode, Typical 100 mA Output Switch Current to 1.5 A Adjustable Output Voltage Range 150 kHz Frequency Operation Precision 2% Reference Internal Thermal Shutdown Protection Cycle-by-Cycle Current Limiting NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes These are Pb-Free Devices
V3064 ALYWG G 1
NCP3064x AWL YYWWG PDIP-8 P, P1 SUFFIX CASE 626 1 NCV3064 AWL YYWWG
8
Applications
* Step-Down, Step-Up and Inverting supply applications * High Power LED Lighting * Battery Chargers
ON/OFF L1 VOUT
8 1
DFN8 MN SUFFIX CASE 488AF
NCP 3064x ALYWG G NCV 3064 ALYWG G
ON/OFF Ipk
SWC
SWE CT
VCC CIN
VCC FB NCP3064
GND
R2 GND
Figure 1. Typical Buck Application Circuit
(c) Semiconductor Components Industries, LLC, 2008
November, 2008 - Rev. 4
CC CC CC CC CC CC CC CC
C C C C C C C C
Rsense
R1 D1
CT GND
NCP3064 x A L, WL Y, YY W, WW G or G
= = = = = = =
Specific Device Code B Assembly Location Wafer Lot Year Work Week Pb-Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 17 of this data sheet.
1
Publication Order Number: NCP3064/D
NCP3064, NCP3064B, NCV3064
SOIC-8/PDIP-8 Switch Collector Switch Emitter Timing Capacitor GND 2 3 4 (Top View) 1 8 7 6 5 ON/OFF Ipk Sense VCC Comparator Inverting Input NOTE: DFN8
Switch Emitter
Timing Capacitor
EP Flag
GND
(Top View)
EP Flag must be tied to GND Pin 4 on PCB
Figure 2. Pin Connections
Figure 3. Pin Connections
8 ON/OFF ON/OFF
TSD 1
Bias R S 7 Ipk Sense Comparator - + 0.2 V 6 VCC Comparator + - 1.25 V Reference Regulator 4 S R 2 Q CT 3 Q
Switch Collector
Switch Emitter Oscillator
Timing Capacitor
GND
5 Comparator Inverting Input
Figure 4. Block Diagram
PIN DESCRIPTION
Pin No. 1 2 3 4 5 6 7 8 Pin Name Switch Collector Switch Emitter Timing Capacitor GND Comparator Inverting Input VCC Ipk Sense ON/OFF Internal Darlington switch collector Internal Darlington switch emitter Timing Capacitor Oscillator Input, Timing Capacitor Ground pin for all internal circuits Inverting input pin of internal comparator Voltage supply Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak current through the circuit ON/OFF Pin. Pulling this pin to High level turns the device in Operating. To switch into mode with low current consumption this pin has to be in Low level or floating. Description
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C C C C
CC CC CC CC
Switch Collector
ON/OFF Ipk Sense VCC Comparator Inverting Input
NCP3064, NCP3064B, NCV3064
MAXIMUM RATINGS (measured vs. Pin 4, unless otherwise noted)
RATING VCC (Pin 6) Comparator Inverting Input (Pin 5) Darlington Switch Emitter (Pin 2) (Transistor OFF) Darlington Switch Collector (Pin 1) Darlington Switch Collector to Emitter (Pins 1 and 2) Darlington Switch Peak Current Ipk Sense Voltage (Pin 7) Timing Capacitor Pin Voltage (Pin 3) Moisture Sensitivity Level Lead Temperature Soldering Reflow (SMD Styles Only), Pb-Free Versions ON/OFF Pin Voltage SYMBOL VCC VCII VSWE VSWC VSWCE ISW VIPK VTC MSL TSLD VON/OFF VALUE -0.3 to 42 -0.3 to VCC -0.6 to VCC -0.3 to 42 -0.3 to 42 1.5 -0.3 to (VCC + 0.3 V) -0.2 to +1.4 1 260 (-0.3 to 25) < VCC C V UNIT V V V V V A V V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
THERMAL CHARACTERISTIC
Rating PDIP-8 (Note 5) Thermal Resistance Junction-to-Air SOIC-8 (Note 5) Thermal Resistance Junction-to-Air DFN-8 (Note 5) Storage temperature range Maximum junction temperature Operation Junction Temperature Range (Note 3) NCP3064 NCP3064B, NCV3064 Thermal Resistance Junction-to-Air Thermal Resistance Junction-to-Case Symbol RqJA RqJA RqJA RqJA TSTG TJ MAX TJ Value 100 180 78 14 -65 to +150 +150 0 to +70 -40 to +125 Unit C/W C/W C/W C C C
1. This device series contains ESD protection and exceeds the following tests: Pins 1 through 8: Human Body Model 2000 V per AEC Q100-002; 003 or JESD22/A114; A115 Machine Model Method 200 V 2. This device contains latch-up protection and exceeds 100 mA per JEDEC Standard JESD78. 3. The relation between junction temperature, ambient temperature and Total Power dissipated in IC is TJ = TA + RQ @ PD. 4. The pins which are not defined may not be loaded by external signals. 5. 1 oz copper, 1 in2 copper area.
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NCP3064, NCP3064B, NCV3064
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, -40C < TJ < +125C for NCP3064B and NCV3064, 0C < TJ < +70C for
NCP3064 unless otherwise specified) Symbol OSCILLATOR fOSC IDISCHG / ICHG IC IDISCH VIPK VSWCE IC(OFF) VTH Frequency Discharge to Charge Current Ratio Capacitor Charging Current Capacitor Discharging Current Current Limit Sense Voltage (VPin 5 = 0 V, CT = 2.2 nF, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (TJ = 25C) 165 110 5.5 150 6.0 275 1.65 200 235 190 6.5 kHz - mA mA mV Characteristic Conditions Min Typ Max Unit
OUTPUT SWITCH (Note 6) Darlington Switch Collector to Emitter Voltage Drop Collector Off-State Current (ISW = 1.0 A, TJ = 25C) (Note 6) (VCE = 40 V) TJ = 25C NCP3064 NCP3064B, NCV3064 REGLiNE ICII in VIH VIL IIH IIL Threshold Voltage Line Regulation Input Bias Current (VCC = 3.0 V to 40 V) (Vin = Vth) TJ = 25C TJ = -40C to +125C TJ = 25C TJ = -40C to +125C TJ = 25C TJ = 25C -1.5 -1.5 -6.0 -1000 2.0 -100 1.0 1.0 1.3 10 V mA
COMPARATOR Threshold Voltage 1.25 +1.5 +1.5 6.0 1000 V % % mV nA
ON/OFF FEATURE ON/OFF Pin Logic Input Level High VOUT = Nominal Output Voltage ON/OFF Pin Logic Input Level Low VOUT = 0 V ON/OFF Pin Input Current ON/OFF Pin = 5 V (ON) ON/OFF Pin Input Current ON/OFF Pin = 0 V (OFF) 2.2 2.4 - - - - - - 15 1.0 - - 1.0 0.8 V V mA mA
TOTAL DEVICE ICC Supply Current (VCC = 5.0 V to 40 V, CT = 2.2 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = GND, remaining pins open) ON/OFF Pin = 0 V (OFF) TJ = 25C TJ = -40C to +125C 85 160 10 7.0 mA
ISTBY
Standby Quiescent Current
100 100
mA
TSHD TSHDHYS
Thermal Shutdown Threshold Hysteresis
C C
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 7. The VIPK (Sense) Current Limit Sense Voltage is specified at static conditions. In dynamic operation the sensed current turn-off value depends on comparator response time and di/dt current slope. See the Operating Description section for details.
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NCP3064, NCP3064B, NCV3064
350 OSCILATOR FREQUENCY (kHz) 300 FREQUENCY (kHz) 250 200 150 100 50 0 150 145 140 135 130 125 120 CT = 2.2 nF TJ = 25C
0 1 2 3 4 5 6 7 8 9 1011 12131415161718192021 CT, CAPACITANCE (nF)
0
5
10
15
20
25
30
35
40
VCC, SUPPLY VOLTAGE (V)
Figure 5. Oscilator Frequency vs. Timing Capacitor CT
2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 -40 1.3 1A 0.75 A 0.5 A 1.25 A ICE = 0.25 A VOLTAGE DROP (V) 1.2 1.1 1.0 0.9 0.8 0.7 -20 0 20 40 60 80 100 120 140 0.6 -40
Figure 6. Oscillator Frequency vs. Supply Voltage
0.75 A
VOLTAGE DROP (V)
1A 1.25 A
0.5 A
ICE = 0.25 A
-20
0
20
40
60
80
100
120
140
TJ, JUNCTION TEMPERATURE (C)
TJ, JUNCTION TEMPERATURE (C)
Figure 7. Emitter Follower Configuration Output Darlington Switch Voltage Drop vs. Temperature
ON/OFF COMP. THRESHOLD VOLTAGE (V)
Figure 8. Common Emmitter Configuration Outp Darlington Switch Voltage Drop vs. Temperatur
1.29 COMP. THRESHOLD VOLTAGE (V) 1.27 1.25 1.23 1.21 1.19
1.6 1.5 1.4 1.3 1.2 1.1 1
-40
-20
0
20
40
60
80
100
120
140
-40
-20
0
20
40
60
80
100
120
140
TJ, JUNCTION TEMPERATURE (C)
TJ, JUNCTION TEMPERATURE (C)
Figure 9. Comparator Threshold Voltage vs. Temperature
Figure 10. ON/OFF Comparator Threshold Voltage vs. Temperature
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NCP3064, NCP3064B, NCV3064
0.20 STANDBY SUPPLY CURRENT (mA) -20 0 20 40 60 80 100 120 140 Vipk, CURRENT LIMIT SENSE VOLTAGE (V) 0.19 0.18 0.17 0.16 0.15 -40 450 400 350 300 250 200 150 100 50 0 0 5 10 15 20 25 30 35 40
TJ, JUNCTION TEMPERATURE (C)
VIN, INPUT VOLTAGE (V)
Figure 11. Current Limit Sense Voltage vs. Temperature
Figure 12. Standby Current vs. Supply Voltage
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NCP3064, NCP3064B, NCV3064
INTRODUCTION The NCP3064 is a monolithic power switching regulator optimized for dc to dc converter applications. The combination of its features enables the system designer to directly implement step-up, step-down, and voltage-inverting converters with a minimum number of external components. Potential applications include cost sensitive consumer products as well as equipment for industrial markets. A representative block diagram is shown in Figure 4.
Operating Description
capacitor. When the output voltage level reaches nominal, the output switch next cycle turning on is inhibited. The feedback comparator will enable the switching immediately when the load current causes the output voltage to fall below nominal. Under these conditions, output switch conduction can be enabled for a partial oscillator cycle, a partial cycle plus a complete cycle, multiple cycles, or a partial cycle plus multiple cycles.
Oscillator
The NCP3064 is a hysteric, dc-dc converter that uses a gated oscillator to regulate output voltage. In general, this mode of operation is some what analogous to a capacitor charge pump and does not require dominant pole loop compensation for converter stability. The Typical Operating Waveforms are shown in Figure 13. The output voltage waveform shown is for a step-down converter with the ripple and phasing exaggerated for clarity. During initial converter startup, the feedback comparator senses that the output voltage level is below nominal. This causes the output switch to turn on and off at a frequency and duty cycle controlled by the oscillator, thus pumping up the output filter
The oscillator frequency and off-time of the output switch are programmed by the value selected for the timing capacitor CT. Capacitor CT is charged and discharged by a 1 to 6 ratio internal current source and sink, generating a positive going sawtooth waveform at Pin 3. This ratio sets the maximum tON/(tON + tOFF) of the switching converter as 6/(6 + 1) or 0.857 (typical). The oscillator peak and valley voltage difference is 500 mV typically. To calculate the CT capacitor value for the required oscillator frequency, use the equation found in Figure 15. An Excel(R) based design tool can be found at www.onsemi.com on the NCP3064 product page.
Figure 13. Typical Operating Waveform
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NCP3064, NCP3064B, NCV3064
Peak Current Sense Comparator
With a voltage ripple gated converter operating under normal conditions, output switch conduction is initiated by the Voltage Feedback comparator and terminated by the oscillator. Abnormal operating conditions occur when the converter output is overloaded or when feedback voltage sensing is lost. Under these conditions, the Ipk Current Sense comparator will protect the Darlington output Switch. The switch current is converted to a voltage by inserting a fractional W resistor, RSC, in series with VCC and the Darlington output switch. The voltage drop across RSC is monitored by the Current Sense comparator. If the voltage drop exceeds 200 mV with respect to VCC, the comparator will set the latch and terminate output switch conduction on a cycle-by-cycle basis. This Comparator/Latch configuration ensures that the Output Switch has only a single on-time during a given oscillator cycle.
Real Vturn-off on Rs Resistor I1 di/dt slope Io t_delay I through the Darlington Switch
inductor pins and with decreasing inductor value. It is recommended to check the real max peak current in the application at worst conditions to be sure that the maximum peak current will never get over the 1.5 A Darlington Switch Current maximum rating.
Thermal Shutdown
Internal thermal shutdown circuitry is provided to protect the IC in the event that the maximum junction temperature is exceeded. When activated, typically at 160C, the Output Switch is disabled. The temperature sensing circuit is designed with 10C hysteresis. The Switch is enabled again when the chip temperature decreases to at least 150C threshold. This feature is provided to prevent catastrophic failures from accidental device overheating. It is not intended to be used as a replacement for proper heat-sinking.
Output Switch
Vipk(sense)
The output switch is designed in a Darlington configuration. This allows the application designer to operate at all conditions at high switching speed and low voltage drop. The Darlington Output Switch is designed to switch a maximum of 40 V collector to emitter voltage and current up to 1.5 A
ON/OFF Function
Figure 14. Current Sense Waveform
The VIPK(Sense) Current Limit Sense Voltage threshold is specified at static conditions. In dynamic operation the sensed current turn-off value depends on comparator response time and di/dt current slope. Real Vturn-off on Rsc resistor Vturn_off = Vipk(sense) + Rs*(tdelay*di/dt) Typical Ipk comparator response time tdelay is 350 ns. The di/dt current slope is growing with voltage difference on the
The ON/OFF function disables switching and puts the part into a low power consumption mode. A PWM signal up to 1 kHz can be used to pulse the ON/OFF and control the output. Pulling this pin below the threshold voltage (~1.4 V) or leaving it open turns the regulator off and has a standby current <100 mA. Pulling this pin above 1.4 V (up to 25 V max) allows the regulator to run in normal operation. If the ON/OFF feature is not needed, the ON/OFF pin can be connected to the input voltage VCC, provided that this voltage does not exceed 25 V.
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NCP3064, NCP3064B, NCV3064
APPLICATIONS Figures 16, 20 and 24 show the simplicity and flexibility of the NCP3064. Two main converter topologies are demonstrated with actual test data shown below the circuit diagrams. Figure 15 gives the relevant design equations for the key parameters. Additionally, a complete application design aid for the NCP3064 can be found at www.onsemi.com.
(See Notes 8, 9, 10) Step-Down
It is possible to create applications with external transistors. This solution helps to increase output current and helps with efficiency, still keeping the cost of materials low. Another advantage of using the external transistor is higher operating frequency, which can go up to 250 kHz. Smaller size of the output components such as inductor and capacitor can be used then.
Step-Up Voltage-Inverting
ton toff ton
Vout ) VF Vin * VSWCE * Vout
ton toff ton toff
Vout ) VF * Vin Vin * VSWCE
ton toff ton toff
|Vout| ) VF Vin * VSWCE
ton toff ton toff
f CT IL(avg) Ipk (Switch) RSC L Vripple(pp) DIL Vout
)1
f
)1 * 343 @ 10 *12
f
)1
CT + 381.6 @ 10 fosc Iout DI IL(avg) ) L 2 0.20 Ipk (Switch) Vin * VSWCE * Vout ton DIL 1 8 f CO VTH
2
*6
t Iout on ) 1 toff DI IL(avg) ) L 2 0.20 Ipk (Switch) Vin * VSWCE ton DIL [ ton Iout ) DIL @ ESR CO VTH R2 )1 R1 [
t Iout on ) 1 toff DI IL(avg) ) L 2 0.20 Ipk (Switch) Vin * VSWCE ton DIL ton Iout ) DIL @ ESR CO VTH R2 )1 R1
) (ESR) 2
R2 )1 R1
8. VSWCE - Darlington Switch Collector to Emitter Voltage Drop, refer to Figures 7, 5, 8 and 9. 9. VF - Output rectifier forward voltage drop. Typical value for 1N5819 Schottky barrier rectifier is 0.4 V. 10. The calculated ton/toff must not exceed the minimum guaranteed oscillator charge to discharge ratio.
Figure 15. Design Equations The Following Converter Characteristics Must Be Chosen:
Vin - Nominal operating input voltage. Vout - Desired output voltage. Iout - Desired output current. DIL - Desired peak-to-peak inductor ripple current. For maximum output current it is suggested that DIL be chosen to be less than 10% of the average inductor current IL(avg). This will help prevent Ipk (Switch) from reaching the current limit threshold set by RSC. If the design goal is to use a minimum inductance value, let DIL = 2(IL(avg)). This will proportionally reduce converter output current capability. f - Maximum output switch frequency. Vripple(pp) - Desired peak-to-peak output ripple voltage. For best performance the ripple voltage should be kept to a low value since it will directly affect line and load regulation. Capacitor CO should be a low equivalent series resistance (ESR) electrolytic designed for switching regulator applications.
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NCP3064, NCP3064B, NCV3064
ON/OFF Input L1 ON R9 10k R1 R15 IC1 ON/OFF Ipk VIN + C1 220mF C2 0.1mF VCC COMP + NCP3064 SOIC SWC SWE CT GND D1 C10 GND 2n2 R4 2k4 GND R2 12k0 47mH VOUT
R3 3k9 C8 0.1mF C9 220mF +
Figure 16. Typical Buck Application Schematic
Table 1. TESTED PARAMETERS
Parameter Value Input Voltage (V) 10 - 16 Output Voltage (V) 3.3 Input Current (A) Max. 0.6 A Output Current (A) Max. 1.25
Table 2. BILL OF MATERIAL
Designator R1 R2 R3 R4 R9 C1 C2, C8 C9 C10 L1 D1 IC Qty 1 1 1 1 1 1 2 1 1 1 1 1 Description Resistor Resistor Resistor Resistor Resisitor Capacitor Capacitor Capacitor Capacitor Inductor Diode Switching Regulator Value 0.15W 12k 3k9 2k4 10k 220mF/35V 100nF 220mF/6V 2.2nF 47mH MBRS230 NCP3064 Tolerance 1% 1% 1% 1% 1% 20% 10% 20% 10% 20% - - Footprint 1206 1206 1206 1206 1206 F 1206 F8 1206 DO3316 SMB SOIC8 Manufacturer Susumu ROHM ROHM ROHM ROHM PANASONIC Kemet SANYO Kemet CoilCraft ON Semiconductor ON Semiconductor Manufacturer Part Number RL1632R-R150-F MCR18EZHF1202 MCR18EZHF3901 MCR18EZHF4701 MCR18EZHF1002 EEEFP1V221AP C1206C104K5RACTU 6SVP220M C1206C222K5RACTU DO3316P-473MLB MBRS230LT3G NCP3064DR2G
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NCP3064, NCP3064B, NCV3064
Figure 17. Buck Demoboard Layout
Figure 18. Buck Demoboard Photo
75 Vin = 10 V 70 EFFICIENCY (%) 65 60 55 50 0 Vin = 16 V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 OUTPUT CURRENT (A)
Figure 19. Efficiency vs. Output Current for Buck Demoboard
Table 3. TEST RESULTS
Line Regulation Load Regulation Output Ripple Efficiency Vin = 9 V to 12 V, Vout = 3.3 V, Iout = 800 mA Vin = 12 V, Vout = 3.3 V, Iout = 800 mA Vin = 12 V, Vout = 3.3 V, Iout = 100 mA to 800 mA Vin = 12 V, Vout = 3.3 V, Iout = 500 mA 8 mV 10 mV < 85 mV Peak - Peak 70%
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NCP3064, NCP3064B, NCV3064
L1 Input ON/OFF ON R9 10k0 R1 0R15 IC1 ON/OFF Ipk VIN + C1 150mF C2 100n VCC COMP NCP3064 SOIC SWC SWE CT GND R4 1k0 C10 2n2 C5 0.1mF C6 + 330mF 100mH VOUT D2 R5 18k0
GND
GND
Figure 20. Typical Boost Application Schematic
Table 4. TESTED PARAMETERS
Parameter Value Input Voltage (V) 10 - 16 Output Voltage (V) 24 Input Current (A) Max. 1.25 Output Current (A) Max. 0.6
Table 5. BILL OF MATERIAL
Designator R1 R5 R6 R9 C1 C2, C5 C6 C10 L2 D2 IC Qty 1 1 1 1 1 2 1 1 1 1 1 Description Resistor Resistor Resistor Resisitor Capacitor Capacitor Capacitor Capacitor Inductor Diode Switching Regulator Value 0.15W 18k 1k 10k 150mF/16V 100nF 330mF/25V 2.2nF 100mH MBRS230 NCP3064 Tolerance 1% 1% 1% 1% 20% 10% 20% 10% 20% - - Footprint 1206 1206 1206 1206 F8 1206 SMD 1206 DO3316 SMB SOIC8 Manufacturer Susumu ROHM ROHM ROHM SANYO Kemet Panasonic Kemet CoilCraft ON Semiconductor ON Semiconductor Manufacturer Part Number RL1632R-R150-F MCR18EZHF1802 MCR18EZHF1001 MCR18EZHF1002 6SVP150M C1206C104K5RACTU EEE-FK1E331GP C1206C222K5RACTU DO3316P-104MLB MBRS230LT3G NCP3064DR2G
Figure 21. Boost Demoboard Layout http://onsemi.com
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Figure 22. Boost Demoboard Photo
NCP3064, NCP3064B, NCV3064
Table 6. TEST RESULTS
Line Regulation Load Regulation Output Ripple Efficiency Vin = 9 V to 15 V, Vout = 24 V, Iout = 250 mA Vin = 12 V, Vout = 24 V, Iout = 50 to 350 mA Vin = 12 V, Vout = 24 V, Iout = 50 to 350 mA Vin = 12 V, Vout = 24 V, Iout = 200 mA 95 90 85 EFFICIENCY (%) 80 75 70 65 60 55 50 45 0 0.04 0.12 0.2 0.28 0.36 0.44 Vin = 10 V Vin = 16 V 3 mV 5 mV < 350 mV Peak - Peak 86%
OUTPUT CURRENT (A)
Figure 23. Efficiency vs. Output Current Current for Boost Demoboard
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NCP3064, NCP3064B, NCV3064
Q1
Q2 D2
Input ON/OFF ON R14 ...... R16
R9 10k R5 1k IC1 R7 10k
L1 22mH R5 3k9 D1 C5 R6 1k R4 2k4 0.1mF VOUT
R1
ON/OFF Ipk VCC NCP3064
SWC SWE CT GND
C9 + 1mF
4 x R15 VIN + C1 m15 C2 +100n
COMP
GND C10 2n2 C4 1n8
GND
Figure 24. Typical Buck with External Transistor Application Schematic
Table 7. TESTED PARAMETERS
Parameter Value Input Voltage (V) 10 - 16 Output Voltage (V) 3.3 Input Current (A) Max. 1.25 Output Current (A) Max. 3
Table 8. BILL OF MATERIAL
Designator R1, R14, R15, R16 R5, R6 R3 R4 R7;R9 C1 C4 C2, C8 C9 C10 Q1 Q2 D2 IC1 D1 L1 Qty 4 2 1 1 2 1 1 2 1 1 1 1 1 1 1 1 Description Resistor Resistor Resistor Resistor Resistor Capacitor Capacitor Capacitor Capacitor Capacitor Transistor Transistor NPN Diode Switching Regulator Diode Inductor Value 0.15R 1k 3k9 2k4 10k 270mF 1n8 100nF 1mF 2.2nF MMSF7P03 MMBT489L MBR130T NCP3064 MBRS330T 22mH Tolerance 1% 1% 1% 1% 1% 20% 10% 10% 20% 10% - - - - - 20% Footprint 1206 1206 1206 1206 1206 10 x 16 1206 1206 F8 1206 SOIC8 SOT-23 SOD-123 SOIC8 SMC Coilcraft Manufacturer Susumu ROHM ROHM ROHM ROHM PANASONIC Kemet Kemet SANYO Kemet ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor Coilcraft Manufacturer Part Number RL1632R-R150-F MCR18EZHF1001 MCR18EZHF3901 MCR18EZHF2401 MCR18EZHF1002 EEUFC1V271 C1206C182K5RACTU C1206C104K5RACTU 4SA1000M C1206C222K5RACTU MMSF7P03HDR2G MMBT489LT1G MBR130T1G NCP3064DR2G MBRS330T3G DO5040H-223MLB
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NCP3064, NCP3064B, NCV3064
Figure 25. Buck Demoboard with External PMOS Transistor Layout
Figure 26. Buck Demoboard with External PMOS Transistor Photo
90 85 EFFICIENCY (%) 80 75 70 65 60 0 Vin = 16 V Vin = 10 V
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (A)
Figure 27. Efficiency vs. Output Current Current for Buck Demoboard with External PMOS Transistor
Table 9. TEST RESULTS
Line Regulation Load Regulation Output Ripple Efficiency Vin = 9 V to 15 V, Vout = 3.3 V, Iout = 2 A Vin = 12 V, Vout = 3.3 V, Iout = 0.5 to 3.0 A Vin = 12 V, Vout = 3.3 V, Iout = 0.5 to 3.0 A Vin = 12 V, Vout = 3.3 V, Iout = 2 A 8 mV 10 mV < 300 mV Peak - Peak 82%
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NCP3064, NCP3064B, NCV3064
The picture in Figure 24. Typical Buck Application Schematic shows typical configuration with external PMOS transistor. Resistor R7 connected between timing capacitor TC Pin and SWE Pin provides a pulse feedback voltage. The pulse feedback approach increases the operating ffrequency by up to 50%. Figure 28, Oscillator Frequency vs. Timing Capacitor with Pulse Feedback, shows the impact to the oscillator frequency at buck converter for Vin = 12 V and Vout = 3.3 V with pulse feedback resistor R7 = 10 kW. It also creates more regular switching waveforms with constant operating frequency which results in lower ripple voltage and improved efficiency.
450 OSCILLATOR FREQUENCY (kHz) 400 350 300 250 200 150 100 50 Without Pulse Feedback 0 0 2 4 6 With Pulse Feedback
If the application allows ON/OFF pin to be biased by voltage and the power supply is not connected to Vcc pin at the same time, then it is recommended to limit ON/OFF current by resistor with value 10 kW to protect the NCP3064 device. This situation is mentioned in Figure 29, ON/OFF Serial Resistor Connection. This resistor shifts the ON/OFF threshold by about 200 mV to higher value, but the TTL logic compatibility is kept in full range of input voltage and operating temperature range.
8
10
12
14
16
18
20
22
TIMING CAPACITANCE (nF)
Figure 28. Oscillator Frequency vs. Timing Capacitor with Pulse Feedback
R ON/OFF 10k
IC1
Rsense
R15
ON/OFF
SWC
Ipk NCP3064 VIN + VCC FB
SWE
CT
GND
Figure 29. ON/OFF Serial Resistor Connection
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NCP3064, NCP3064B, NCV3064
ORDERING INFORMATION
Device NCP3064MNTXG NCP3064BMNTXG NCP3064PG NCP3064BPG NCP3064DR2G NCP3064BDR2G NCV3064MNTXG NCV3064PG NCV3064DR2G Package DFN-8 (Pb-Free) DFN-8 (Pb-Free) PDIP-8 (Pb-Free) PDIP-8 (Pb-Free) SOIC-8 (Pb-Free) SOIC-8 (Pb-Free) DFN-8 (Pb-Free) PDIP-8 (Pb-Free) SOIC-8 (Pb-Free) Shipping 4000 Units / Tape & Reel 4000 Units / Tape & Reel 50 Units / Rail 50 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 4000 Units / Tape & Reel 50 Units / Rail 2500 Units / Tape & Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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17
NCP3064, NCP3064B, NCV3064
PACKAGE DIMENSIONS
8 LEAD PDIP CASE 626-05 ISSUE L
8 5
-B-
1 4
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --10_ 0.76 1.01 AC IN DC + IN DC - IN AC IN GROUND OUTPUT AUXILIARY VCC INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --10_ 0.030 0.040
F
NOTE 2
-A-
L
C -T-
SEATING PLANE
J N D K
M
M TA B
H
G 0.13 (0.005)
M M
STYLE 1: PIN 1. 2. 3. 4. 5. 6. 7. 8.
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18
NCP3064, NCP3064B, NCV3064
PACKAGE DIMENSIONS
SOIC-8 NB CASE 751-07 ISSUE AJ
-X-
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751-01 THRU 751-06 ARE OBSOLETE. NEW STANDARD IS 751-07. DIM A B C D G H J K M N S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
A
8 5
B
1
S
4
0.25 (0.010)
M
Y
M
-Y- G
K
C -Z- H D 0.25 (0.010)
M SEATING PLANE
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
SOLDERING FOOTPRINT*
1.52 0.060
7.0 0.275
4.0 0.155
0.6 0.024
1.270 0.050
SCALE 6:1 mm inches
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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19
NCP3064, NCP3064B, NCV3064
PACKAGE DIMENSIONS
8 PIN DFN, 4x4 CASE 488AF-01 ISSUE B
NOTES: 1. DIMENSIONS AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.25 AND 0.30 MM FROM TERMINAL. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. MILLIMETERS MIN MAX 0.80 1.00 0.00 0.05 0.20 REF 0.25 0.35 4.00 BSC 1.91 2.21 4.00 BSC 2.09 2.39 0.80 BSC 0.20 --- 0.30 0.50
D
PIN ONE IDENTIFICATION
A B
8X
8X
K
8
L
1
E
2X
0.15 C b
2X 8X NOTE 3
0.15 C
TOP VIEW
0.10 C A B 0.05 C
0.10 C A C
8X
0.08 C
SEATING PLANE
A1
(A3)
SIDE VIEW
SOLDERING FOOTPRINT*
4.30 2.21 2.39 0.63
8X
0.35
8X
DIMENSIONS: MILLIMETERS
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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20
CC CC CC CC CC CC
CC CC CC CC CC CC
1
C CC C CC C CC C CC C CC
5
D2
4
E2
e
BOTTOM VIEW
DIM A A1 A3 b D D2 E E2 e K L
CC C CC
0.40 0.80 PITCH
2.75
NCP3064/D

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