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MIC5332
Micro-Power High Performance Dual 300mA ULDOTM
General Description
The MIC5332 is a tiny dual low quiescent current LDO ideal for applications that are power sensitive. The MIC5332 integrates two high performance 300mA LDOs, and a POR generator into a 2mm x 2mm Thin MLF(R) package. This solution occupies the same PC board area of a single SOT-23 package. The MIC5332 is designed to reject input noise and provide low output noise with fast transient response so as to respond to any load change quickly even though it is a low quiescent current part. This combination of PSRR, low noise and transient response, along with low power consumption makes for a very high performance, yet general purpose product. The MIC5332 is a Cap design, operating with very small ceramic output capacitors, which reduces required board space and component cost. It is available in fixed output voltages in a tiny 8-pin 2mm x 2mm Thin MLF(R) leadless package. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com.
Features
* * * * * * * * * * * 2.3V to 5.5V input voltage range 300mA output current per LDO Very low quiescent current: 25A per LDO POR output with programmable delay on LDO2 High PSRR - >65dB on each LDO Stable with 1F ceramic output capacitors Tiny 8-pin 2mm x 2mm Thin MLF(R) package Ultra-low dropout voltage - 120mV @ 300mA Low output voltage noise - 50Vrms Thermal shutdown protection Current limit protection
Applications
* * * * * Camera phones Mobile phones PDAs GPS receivers Portable devices
___________________________________________________________________________________________________________
Typical Application
10k VI/O VCORE /RST 1F 1F Processor
MIC5332-xxYMT VIN EN1 EN2 VBAT CIN 1F CSET2 POR2 GND VOUT1 VOUT2
Camera DSP Power Supply Circuit
ULDO is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
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Micrel, Inc.
MIC5332
Ordering Information
Part Number MIC5332-2.5/1.2YMT MIC5332-2.8/2.8YMT MIC5332-2.8/2.85YMT MIC5332-2.85/2.85YMT MIC5332-3.0/2.8YMT MIC5332-3.0/2.85YMT MIC5332-3.0/3.0YMT Manufacturing Part Number MIC5332-J4YMT MIC5332-MMYMT MIC5332-MNYMT MIC5332-NNYMT MIC5332-PMYMT MIC5332-PNYMT MIC5332-PPYMT Voltage 2.5V/1.2V 2.8V/2.8V 2.8V/2.85V 2.85V/2.85V 3.0V/2.8V 3.0V/2.85V 3.0V/3.0V Junction Temperature Range -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C -40 to +125C Package 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R) 8-Pin 2mm x 2mm Thin MLF(R)
Note: Other voltage options available. Contact Micrel for additional details.
Pin Configuration
VIN GND POR2 EN2 1 2 3 4 8 7 6 5 VOUT1 VOUT2 CSET2 EN1
8-Pin 2mm x 2mm Thin MLF(R) (MT) (Top View)
Pin Description
Pin Number
1 2 3 4 5 6
Pin Name
VIN GND POR2 EN2 EN1 CSET2
Pin Function
Supply Input. Ground. Power-On Reset Output (Regulator 2): Open-drain output. Active low indicates an output under-voltage condition on regulator 2 when the device is enabled. Enable Input (Regulator 2): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. Enable Input (Regulator 1): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. Delay Set Input (Regulator 2): Connect external capacitor to GND to set the internal delay for the POR2 output. When left open, there is no delay. This pin cannot be grounded. Regulator Output - LDO2. Regulator Output - LDO1.
7 8
VOUT2 VOUT1
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Absolute Maximum Ratings(1)
Supply Voltage (VIN) ............................................. 0V to +6V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN POR2 Voltage (VPOR2) .......................................... 0V to +6V Power Dissipation .................................. Internally Limited(3) Lead Temperature (soldering, 3sec.)......................... 260C Storage Temperature (Ts) .........................-65C to +150C ESD Rating(4) .................................................................. 2kV
Operating Ratings(2)
Supply Voltage (VIN)..................................... +2.3V to +5.5V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN POR2 Voltage (VPOR2) ....................................... 0V to +5.5V Junction Temperature (TJ) ........................ -40C to +125C Junction Thermal Resistance 2mm x 2mm Thin MLF-8 (JA) ...........................90C/W
Electrical Characteristics(5)
VIN = VEN1 = VEN2 = VOUT + 1.0V, higher of the two regulator outputs; IOUT1 = IOUT2 = 100A; COUT1 = COUT2 = 1F; TJ = 25C, bold values indicate -40C < TJ < +125C; unless noted.
Parameter
Output Voltage Accuracy Line Regulation Load Regulation Dropout Voltage Ground Current
Condition
Variation from nominal VOUT Variation from nominal VOUT; -40C to +125C VIN = VOUT +1V to 5.5V; IOUT = 100A IOUT = 100A to 300mA IOUT = 50mA IOUT = 300mA VEN1 = High; VEN2 = Low; IOUT = 100A to 300mA VEN1 = Low; VEN2 = High; IOUT = 100A to 300mA VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA
Min
-1.0
Typ
Max
+1.0
Units
% % %/V %/V % mV mV A A A A dB dB
-2.0
0.02 0.2 20 120 25 25 40 0.01 65 45 350 550 50
+2.0
0.3 0.6 0.5
40 240 50 50 75
1.0
Ground Current in Shutdown Ripple Rejection Current Limit Output Voltage Noise
VEN1 = VEN2 < 0.2V f = 1kHz; COUT = 2.2F; f = 20kHz; COUT = 2.2F; VOUT = 0V COUT=1F, 10Hz to 100kHz Logic Low Logic High
800
mA VRMS
Enable Inputs (EN1/EN2 )
Enable Input Voltage Enable Input Current
0.2 1.2
0.01 0.01 140 110 88 98 0.02
V V A A s s % % V A
VIL 0.2V VIH 1.2V
1.0 1.0 500 500
Turn-on Time
Turn-on Time (LDO1 and 2) COUT = 1F (Enable of First LDO) COUT = 1F (Enable of Second LDO after First Enabled)
POR2 Output (LDO2 only)
VTH VOL IPOR2 Low Threshold, % of VOUT2 (POR2 ON) High Threshold, % of VOUT2 (POR2 OFF) POR2 Output Logic Low Voltage; IL = 250A POR2 Leakage Current, POR2 OFF
0.1 +1.0
-1.0
0.01
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Parameter CSET2 INPUT
CSET2 Pin Current Source CSET2 Pin Threshold Voltage
Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating.
MIC5332
Condition
VCSET2 = 0V POR2 = High
Min 0.8 1.21
Typ
1.4 1.25
Max 2 1.29
Units
A V
3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only.
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Typical Characteristics
PSRR
-100 -90 -80 -70 -60 -50 -40 -30 -20 VIN = 2.3V V = 1.2V -10 OUT COUT = 2.2F 0 FREQUENCY (Hz) 300mA -90 50mA -80 -70 -60 -50 -40 -30 -20 VIN = 2.3V -10 VOUT = 1.2V COUT = 1F 0 FREQUENCY (Hz) 300mA 50mA
PSRR
0.14 0.12 0.10 0.08 0.06 0.04 0.02 0 0
Dropout Voltage vs. Load Current
VOUT = 2.8V COUT = 1F 50 100 150 200 250 300 LOAD CURRENT (mA)
0.18
Dropout Voltage vs. Temperature
300mA
VOUT = 2.8V 0.16 COUT = 1F 0.14 0.12 0.10 0.08 0.06 0.04 0.02
41 39 37
Ground Current vs. Supply Voltage
Dual LDO Enabled
41 39 37
Ground Current vs. Load Current
Dual LDO Enabled
100mA 50mA 10mA
VOUT1 = 2.5V 35 VOUT2 = 1.2V COUT1 = 1F 33 COUT2 = 1F 31 IOUT1 = 300mA IOUT2 = 300mA 29 27 25 2.5
35 VIN = VOUT + 1V VOUT1 = 2.5V 33 VOUT2 = 1.2V 31 COUT1 = 1F COUT2 = 1F 29 27
Single LDO Enabled
Single LDO Enabled
0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
3 3.5 4 4.5 5 SUPPLY VOLTAGE (V)
5.5
25 0
50 100 150 200 250 300 LOAD CURRENT (mA)
45 42 39 36
Ground Current vs. Temperature
2.820 2.816 2.812
Output Voltage vs. Load Current
3.0 2.9 2.8 2.7
Output Voltage vs. Temperature
10mA 100mA
300mA
2.808 2.804 2.800 0 VIN = VOUT + 1V VOUT = 2.8V COUT = 1F 50 100 150 200 250 300 LOAD CURRENT (mA)
EN1 = EN2 = VIN VIN = VOUT + 1V 33 VOUT = 2.8V COUT = 1F 30 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
2.6
2.5 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C)
VIN = VOUT + 1V VOUT = 2.8V COUT = 1F
850 800 750 700 650 600 550 500 450 400 350 2.5
Current Limit vs. Supply Voltage
POR2 Delay vs. CSET2
100K
1.2 1.0
Output Noise Spectral Density
VIN = VOUT + 1V VOUT = 2.8V COUT = 1F Load = 50mA
10K LDO2
0.8 0.6
1K
CIN = 1F COUT = 1F 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) 5.5
0.4
100 100
VIN = 3.6V VOUT = 1.2V COUT = 1F 1K 10K CSET2 (pF) 100K
0.2 0 10 100 1K 10K 100K FREQUENCY (Hz) 1M
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Functional Characteristics
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Functional Diagram
VIN
LDO1
VOUT1
LDO2 EN1 EN2
Reference Enable Thermal Shutdown
VOUT2
POR
Delay
POR2
CSET2
GND
MIC5332 Block Diagram
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MIC5332 the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output.
Application Information
MIC5332 is a dual 300mA LDO, with an integrated Power On Reset (POR) for the second regulator. The MIC5332 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown.
Input Capacitor The MIC5332 is a high-performance, high bandwidth device. Therefore, it requires a well-bypassed input supply for optimal performance. A 1F capacitor is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional highfrequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. Output Capacitor The MIC5332 requires an output capacitor of 1F or greater to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1F ceramic output capacitor and does not improve significantly with larger capacitance. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. No-Load Stability Unlike many other voltage regulators, the MIC5332 will remain stable and in regulation with no load. This is especially import in CMOS RAM keep-alive applications. Enable/Shutdown The MIC5332 comes with dual active-high enable pins that allow each regulator to be disabled independently. Forcing the enable pin low disables the regulator and sends it into a "zero" off-mode-current state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and
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Power On Reset The second regulator has a Power On Reset status pin (POR2). This pin is an open drain output. When LDO2 is enabled an active low POR2 indicates an under voltage condition on VOUT2. The POR2 status signal can be programmed for a delay of 1sec/F by placing a capacitor from the CSET2 pin to ground. Zero delay is added by leaving the CSET2 pin open circuit. Thermal Considerations The MIC5332 is designed to provide 300mA of continuous current for both outputs in a very small package. Maximum ambient operating temperature can be calculated based upon the output current and the voltage drop across the part. For example if the input voltage is 3.6V, the output voltage is 3.0V for VOUT1, 2.8V for VOUT2 and the output current = 300mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN - VOUT1) IOUT1 + (VIN - VOUT2) I OUT2 + VIN IGND Because this device is CMOS and the ground current is typically <100A over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.6V - 3.0V) x 300mA + (3.6V -2.8) x 300mA PD = 0.42W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation:
TJ(MAX) - TA PD(MAX) = JA
TJ(max) = 125C, and the maximum junction temperature of the die, JA, thermal resistance = 90C/W. Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 90C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5332-PMYMT at an input voltage of 3.6V and 300mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.42W = (125C - TA)/(90C/W) TA = 87.2C
M9999-011608-A
Micrel, Inc. Therefore, a 3.0V/2.8V application with 300mA at each output current can accept an ambient operating temperature of 87C in a 2mm x 2mm MLF(R) package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the "Regulator Thermals"
MIC5332 section of Micrel's Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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MIC5332 Typical Application Circuit
U1 MIC5332-xxYMT
1
VIN
J1 VIN J3 POR J4 EN2 J5 EN1
C1 1F
VIN
VOUT1
8
J6 VOUT1 J8 VOUT2
R3 10k
R2 10k
R1 10k
3 4 5
POR2 EN2 EN1 GND
2
VOUT2
7
CSET2
6
C4 0.1F
C2 1F
C3 1F
J2 GND
J7 GND
Bill of Materials
Item C1, C2, C3 C4 R1, R2, R3 U1
Notes: 1. 2. 3. TDK: www.tdk.com Vishay: www.vishay.com Micrel, Inc.: www.micrel.com
Part Number C1608X5R0J105K VJ0603Y104KXXAT CRCW06031002FKEYE3 MIC5332-XXYMT
Manufacturer TDK
(1) (2) (2)
Description Capacitor, 1F Ceramic, 6.3V, X5R, Size 0603 Capacitor, 0.1F Ceramic, 10V, X7R, Size 0603 Resistor, 10k, 1%, 1/16W, Size 0603 UCAP LDO, Dual 300mA, Size 2mm x 2mm Thin MLF
(R)
Qty 3 1 3 1
Vishay Micrel
Vishay
(3)
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PCB Layout Recommendations
1400 (mil)
1350 (mil)
Top Layer
1400 (mil)
1350 (mil)
Bottom Layer
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Package Information
8-Pin 2mm x 2mm Thin MLF (MT)
(R)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2007 Micrel, Incorporated.
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