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PT6300 Series
3 Amp Adjustable Positive Step-down Integrated Switching Regulators
SLTS031A
(Revised 6/30/2000)
* * * * * * *
90% Efficiency Adjustable Output Voltage Internal Short Circuit Protection Over-T emperature Protection On/Off Control (Ground Off) Small SIP Footprint Wide Input Range
The PT6300 Series is a line of High-Performance 3 Amp, 12-Pin SIP (Single In-line Package) Integrated
Switching Regulators (ISRs) designed to meet the on-board power conversion needs of battery powered or other equipment requiring high efficiency and small size. This high performance ISR family offers a unique combination of features combining 90% typical efficiency with open-collector on/off control and adjustable output voltage. Quiescent current in the shutdown mode is typically less than 100A.
Pin-Out Information
Pin
1
Ordering Information
PT6302 PT6303 PT6304 = +5 Volts = +3.3 Volts = +12 Volts
PT Series Suffix (PT1234X)
Case/Pin Configuration
Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount
Function
Inhibit
(30V max)
Standard Application
VOADJ
12
2 3
9,10,11
Vin Vin Vin GND GND GND GND Vout Vout Vout Vout Adj
N A C
VIN
2,3,4 1
PT6300
5,6,7,8
VOUT
4 5 6 7
Pkg Style 200
C1 INH COM Q1
C2
+
COM
8 9 10 11 12
C1 = Optional 1F ceramic C2 = Required 100F electrolytic Q1 = NFET
Specifications
Characteristics (Ta=25C unless noted) Output Current Short Circuit Current Input Voltage Range (Note: inhibit function cannot be used above 30V .) Output Voltage T olerance Line Regulation Load Regulation Vo Ripple/Noise Transient Response with Co = 100F Efficiency Switching Frequency Shutdown Current Quiescent Current Output Voltage Adjustment Range Absolute Maximum Operating T emperature Range Recommendated Operating Temperature Range Thermal Resistance Storage T emperature Mechanical Shock Mechanical Vibration Weight -- Symbols Io Isc Vin Vo Regline Regload Vn ttr Vos o Isc Inl Vo Ta Ta
PT6300 SERIES
Conditions Over Vin range Vin = Vo + 5V 0.1 Io 3.0 A Vo = 3.3V Vo = 5V Vo = 12V Min 0.1* -- 9 9 16 -- -- -- -- -- -- -- -- -- 400 600 -- Typ -- 5.0 -- -- -- 1.0 0.25 0.25 2 100 5.0 84 89 91 500 750 100 Max 3.0 -- 26 30/38** 30/38** 2.0 0.5 0.5 -- 200 -- -- -- -- 600 900 -- Units A Apk V V V %Vo %Vo %Vo %Vo Sec %Vo % % % kHz kHz A mA
Over Vin Range, Io = 3.0 A Ta = 0C to +60C Over Vin range 0.1 Io 3.0 A Vin = Vin min, Io = 3.0 A 50% load change Vo over/undershoot Vin=9V, Io = 0.5 A, Vo = 3.3V Vin=9V, Io = 0.5 A, Vo = 5V Vin=16V, Io = 0.5 A, Vo = 12V Over Vin and Io ranges,Vo = 3.3V/5V Vo = 12V Vin = 15V Io = 0A, Vin =10V Below Vo Above Vo
-- 10 -- See Application Notes. -40 -- -- 30 -- 500 10 6.5 +85 +80*** -- +125 -- -- --
C
C C/W
ja
Ts
Free Air Convection, (40-60LFM) At Vin = 24V, Io = 2.5A Free Air Convection (40-60LFM) -- Per Mil-STD-883D, Method 2002.3, 1 msec, Half Sine, mounted to a fixture Per Mil-STD-883D, Method 2007.2, 20-2000 Hz,Soldered in a PC board --
-40 -- -40 -- -- --
C G's G's grams
* ISR will operate to no load with reduced specifications. ** Input voltage cannot exceed 30V when the inhibit function is used. *** See Thermal Derating chart. Note: The PT6300 Series requires a 100F electrolytic or tantalum output capacitor for proper operation in all applications.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6300 Series
3 Amp Adjustable Positive Step-down Integrated Switching Regulators
Typical Characteristics
PT6303, 3.3 VDC
(See Note 1)
PT6302, 5.0 VDC
(See Note 1)
PT6304, 12.0 VDC
(See Note 1)
Efficiency vs Output Current
100 100
Efficiency vs Output Current
100
Efficiency vs Output Current
90
90
90
Efficiency - %
Efficiency - %
Vin 80 9.0V 12.0V 15.0V 20.0V 26.0V
Efficiency - %
Vin 80 9.0V 12.0V 15.0V 24.0V 30.0V 38.0V
80
Vin 16.0V 20.0V
70
70
70
24.0V 30.0V 38.0V
60
60 50 50 0 0.5 1 1.5 2 2.5 3 40 0 0.5 1 1.5 2 2.5 3
60
50
40
40 0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Ripple vs Output Current
160 140 120 Vin 100 80 60 40 20 0 0 0.5 1 1.5 2 2.5 3 V
180 160 140
Ripple vs Output Current
350
Ripple vs Output Current
300
Vin 38.0V 30.0V 24.0V 15.0V 12.0V 9.0V
Ripple-(mV)
Ripple-(mV)
250
Vin 38.0V 30.0V 24.0V 20.0V 16.0V
120 100 80 60 40 20 0 0 0.5 1 1.5 2 2.5 3
Ripple-(mV)
26.0V
20.0V 15.0V 12.0V 9.0V
200
150
100
50
0 0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Thermal Derating (Ta)
3 2.5
(See Note 2)
60C 70C
2.5 3
Thermal Derating (Ta)
(See Note 2)
3
Thermal Derating (Ta)
2.5
(See Note 2)
40C 50C
50C 60C
60C
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
2
2
70C 85C
2
85C
70C
1.5
1.5
1.5
1
1
1
0.5
0.5
0.5
0
0 9 11 13 15 17 19 21 23 25 27
0
9
13
17
21
25
29
33
37
16
19
22
25
28
31
34
37
Vin-(Volts)
Vin-(Volts)
Vin-(Volts)
Power Dissipation vs Output Current
3.5 3 2.5 Vin
3.5 3
Power Dissipation vs Output Current
4.5 4
Vin
Power Dissipation vs Output Current
3.5
2.5
PD-(Watts)
PD-(Watts)
PD-(Watts)
2 1.5 1 0.5 0 0 0.5 1 1.5 2 2.5 3
26.0V 20.0V 15.0V 12.0V 9.0V
2
1.5
38.0V 30.0V 24.0V 15.0V 12.0V 9.0V
3 2.5 2 1.5 1
Vin 38.0V 30.0V 24.0V 20.0V 16.0V
1
0.5
0.5
0 0 0.5 1 1.5 2 2.5 3
0 0 0.5 1 1.5 2 2.5 3
Iout-(Amps)
Iout-(Amps)
Iout-(Amps)
Note 1: All data listed in the above graphs except for derating data has been developed from actual products tested at 25C. This data is considered typical data for the ISR Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Adjusting the Output Voltage of Power Trends' Wide Input Range Bus ISRs
The output voltage of the Power Trends' Wide Input Range Series ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor. T able 1 accordingly gives the allowable adjustment range for each model for either series as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 12 (Vo adjust) and pins 5-8 (GND). Adjust Down: Add a resistor (R1), between pin 12 (Vo adjust) and pins 9-11(Vout). Refer to Figure 1 and T able 2 for both the placement and value of the required resistor; either (R1) or R2 as appropriate. Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo adjust to either GND or Vout. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. Adjustments to the output voltage may place additional limits on the maximum and minimum input voltage for the part. The revised maximum and minimum input voltage limits must comply with the following requirements. Note that the minimum input voltage limits are also model dependant. Vin (max) = (8 x Va)V or *30/38V, whichever is less.
*
Figure 1
Vin
2,3,4
PT6100/6200/6300
Vin GND 5,6,7,8 Vo(adj) 12 Vo
9,10,11
Vo
C1 1F Ceramic (Optional)
(R1) Adj Down
C2 + 100F (Req'd)
R2 Adjust Up COM COM
The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae. Ro (Va - 1.25) Vo - Va 1.25 Ro Va - Vo
(R1) R2
= =
k k
Where: Vo = Original output voltage Va = Adjusted output voltage able 1 Ro = The resistance value fromT
Limit is 30V when inhibit function is active.
Table 1 ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS
1Adc Rated 2Adc Rated 3Adc Rated Vo (nom) Va (min) Va (max) Ro (k) PT6102 PT6213 PT6303 3.3 1.89 6.07 66.5 PT6101 PT6212 PT6302 5.0 1.88 11.25 150.0 5.0 2.18 8.5 90.9 PT6103 PT6214 PT6304 12.0 2.43 22.12 243.0
PT6x0x/PT6x1x series:
Vin (min) = (Va + 4)V or 9V, whichever is greater.
PT6x2x series:
Vo <10V; Vo 10V;
Vin (min) = (Va + 2.0)V or 7.0V, whichever is greater. Vin (min) = (Va + 2.5)V
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
PT6100/6210/6300 Series
Table 2
ISR ADJUSTMENT RESISTOR VALUES
1Adc Rated 2Adc Rated 3Adc Rated Vo (nom) Va (req.d) 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 R1 = (Blue) 831.0k 416.0k 227.0k 208.0k 166.0k 139.0k 119.0k 104.0k 92.4k 83.1k 75.6k 69.3k 63.9k 59.4k 55.4k 52.0k 48.9k 46.2k 43.8k 41.6k 39.6k 37.8k 36.1k 34.6k 33.3k 32.0k 30.8k R2 = Black 1880.0k 937.0k 625.0k 469.0k 375.0k 313.0k 268.0k 234.0k 208.0k 188.0k 1140.0k 568.0k 379.0k 284.0k 227.0k 189.0k 162.0k 142.0k 126.0k 114.0k PT6102 PT6213 PT6303 3.3 (30.9)k (38.4)k (47.1)k (57.4)k (69.8)k (85.0)k (104.0)k (128.0)k (161.0)k (206.0)k (274.0k (388.0)k (615.0)k (1300.0)k PT6101 PT6212 PT6302 5.0 PT6103 PT6214 PT6304 12.0
ISR ADJUSTMENT RESISTOR VALUES (Cont)
1Adc Rated 2Adc Rated 3Adc Rated Vo (nom) Va (req.d) 6.2 6.4 6.6 (30.8)k (35.4)k (40.2)k (45.5)k (51.1)k (57.3)k (64.0)k (71.4)k (79.5)k (88.5)k (98.5)k (110.0)k (122.0)k (136.0)k (153.0)k (171.0)k (193.0)k (219.0)k (250.0)k (288.0)k (335.0)k (396.0)k (477.0)k (591.0)k (761.0)k (1050.0)k (1610.0)k (32.0)k (34.9)k (37.9)k (40.9)k (44.1)k (47.3)k (50.5)k (53.8)k (57.3)k (60.8)k (64.3)k (68.0)k (71.7)k (75.6)k (79.5)k (83.5)k (87.7)k (91.9)k (96.3)k (101.0)k (105.0)k (110.0)k (115.0)k (120.0)k (125.0)k (130.0)k (136.0)k (141.0)k (147.0)k (153.0)k (159.0)k (165.0)k (172.0)k (178.0)k (185.0)k (192.0)k 6.8 7.0 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 8.8 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.5 21.5 22.0 608.0k 304.0k 203.0k 152.0k 122.0k 101.0k 86.8k 75.9k 67.5k 60.8k 55.2k 50.6k 46.7k 43.4k 40.5k 38.0k 35.7k 33.8k 32.0k 30.4k PT6101 PT6212 PT6302 5.0 94.7k 81.2k 71.0k 63.1k 56.8k 51.6k 47.3k 43.7k 40.6k 37.9k 35.5k 33.4k PT6103 PT6214 PT6304 12.0 (207.0)k (223.0)k (241.0)k (259.0)k (279.0)k (301.0)k (325.0)k (351.0)k (379.0)k (410.0)k (444.0)k (483.0)k (525.0)k (573.0)k (628.0)k (802.0)k (1060.0)k (1500.0)k
5.0 (31.5)k (37.5)k (44.0)k (50.9)k (58.3)k (66.3)k (75.0)k (84.4)k (94.6)k (106.0)k (118.0)k (131.0)k (146.0)k (163.0)k (181.0)k (202.0)k (225.0)k (252.0)k (283.0)k (319.0)k (361.0)k (413.0)k (475.0)k (533.0)k (654.0)k (788.0)k (975.0)k (1260.0)k (1730.0)k
5.0 156.0k 134.0k 117.0k 104.0k 93.8k 85.2k 78.1k 72.1k 67.0k 62.5k 58.6k 55.1k 52.1k 49.3k 46.9k 41.7k 37.5k 34.1k 31.3k
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes
PT6100/6210/6300 Series
Using the Inhibit Function on Power Trends' Wide Input Range Bus ISRs
For applications requiring output voltage On/Off control, the 12pin ISR products incorporate an inhibit function. The function has uses in areas such as battery conservation, power-up sequencing, or any other application where the regulated output from the module is required to be switched off. The On/Off function is provided by the Pin 1 (Inhibit) control. The ISR functions normally with Pin 1 open-circuit, providing a regulated output whenever a valid source voltage is applied to Vin, (pins 2, 3, & 4). When a low-level2 ground signal is applied to Pin 1, the regulator output will be disabled. Figure 1 shows an application schematic, which details the typical use of the Inhibit function. Note the discrete transistor (Q1). The Inhibit control has its own internal pull-up with a maximum open-circuit voltage of 8.3VDC. Only devices with a true open-collector or open-drain output can be used to control this pin. A discrete bipolar transistor or MOSFET is recommended. Equation 1 may be used to determine the approximate current drawn by Q1 when the inhibit is active.
Equation 1
Figure 1
V in
2,3,4
PT6100/6210/6300
Vin Inh* 1 GND Vo Vo(adj) 12
9,10,11
V out
+
5,6,7,8
C1, 1F (Optional)
Inh COM
Q1 BSS138
C2 100F
COM
Istby
= Vin / 155k
20%
Turn-On Time: The output of the ISR is enabled automatically when external power is applied to the input. The Inhibit control pin is pulled high by its internal pull-up resistor. The ISR produces a fully regulated output voltage within 1-msec of either the release of the Inhibit control pin, or the application of power. The actual turn-on time will vary with the input voltage, output load, and the total amount of capacitance connected to the output Using the circuit of Figure 1, Figure 2 shows the typical rise in output voltage for the PT6101 following the turn-off of Q1 at time t =0. The waveform was measured with a 9Vdc input voltage, and 5-Ohm resistive load.
Figure 2
Notes: 1. The Inhibit control logic is similar for all Power Trends' modules, but the flexibility and threshold tolerances will be different. For specific information on the inhibit function of other ISR models, consult the applicable application note. 2. Use only a true open-collector device (preferably a discrete transistor) for the Inhibit input. Do Not use a pull-up resistor, or drive the input directly from the output of a TTL or other logic gate. T disable the output voltage, o the control pin should be pulled low to less than +1.5VDC. 3. When the Inhibit control pin is active, i.e. pulled low, the maximum allowed input voltage is limited to +30Vdc. 4. Do not control the Inhibit input with an external DC voltage. This will lead to erratic operation of the ISR and may over-stress the regulator. 5. Avoid capacitance greater than 500pF at the Inhibit control pin. Excessive capacitance at this pin will cause the ISR to produce a pulse on the output voltage bus at turn-on. 6. Keep the On/Off transition to less than 10s. This prevents erratic operation of the ISR, which can cause a momentary high output voltage.
6 5 4 Vo (Vdc) 3 2 1 0 -0.2 0 0.2 0.4 t (milli-secs) 0.6 0.8 1
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
I MPORTANT NOTI CE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof.
Copyright (c) 2000, Texas Instruments Incorporated

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