MIC5331
Micro-Power High Performance
Dual 300mA ULDO™
ULDO is a trademark of Micrel, Inc.
MLF and Micro LeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jo, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
贵州云台山General Description
The MIC5331 is a tiny dual low quiescent current LDO ideal for applications that are power nsitive. The MIC5331 integrates two high performance, 300mA LDOs into a tiny 2mm x 2mm Thin MLF ® package, which occupies less PC board area than a single SOT-23 package.
The MIC5331 is designed to reject input noi and provide low output noi with fast transient respons
e to any load change quickly even though it is a low quiescent current part. This combination of PSRR, low noi and transient respon along with low power consumption makes for a very high performance, yet general purpo product.
The MIC5331 is a µCap design, operating with very small ceramic output capacitors, which reduces required board space and component cost; and it is available in fixed output voltages in the tiny 8-pin 2mm x 2mm Thin MLF ® leadless package.
Data sheets and support documentation can be found on Micrel’s web site at:
Features
• 2.3V to 5.5V input voltage range • 300mA output current per LDO
• Very low quiescent current: 25µA per LDO • High PSRR - >65dB on each LDO
• Stable with 1µF ceramic output capacitors • Tiny 8-pin 2mm x 2mm Thin MLF ® package • Ultra-low dropout voltage – 120mV @ 300mA • Low output voltage noi – 50µVrms • Thermal shutdown protection • Current limit protection
Applications
• Camera phones • Mobile phones • PDAs • GPS receivers • Portable devices
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Typical Application
VBAT
Camera DSP Power Supply Circuit
Ordering Information
Part Number
Manufacturing Part Number
Marking Voltage
Junction Temperature Range
Package
MIC5331-1.8/1.2YMT MIC5331-G4YMT UG4 1.8V/1.2V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-2.5/1.2YMT MIC5331-J4YMT
UJ4 2.5V/1.2V
–40° to +125°C 8-Pin 2mm x 2mm Thin MLF ®
MIC5331-2.8/2.8YMT MIC5331-MMYMT UMM 2.8V/2.8V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-2.8/2.85YMT MIC5331-MNYMT UMN 2.8V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-2.85/2.85YMT MIC5331-NNYMT UNN
2.85V/2.85V
–40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-3.0/2.8YMT MIC5331-PMYMT UPM 3.0V/2.8V
–40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-3.0/2.85YMT MIC5331-PNYMT
UPN 3.0V/2.85V
–40° to +125°C 8-Pin 2mm x 2mm Thin MLF ® MIC5331-3.0/3.0YMT MIC5331-PPYMT UPP 3.0V/3.0V
–40° to +125°C
8-Pin 2mm x 2mm Thin MLF ®
Note: Other voltage options available. Contact Micrel for details.
Pin Configuration
VIN GND NC EN2
VOUT1VOUT2NC EN1
8-Pin 2mm x 2mm Thin MLF ® (MT)
(Top View)
Pin Description
Pin Number
Pin Name
Pin Function
1 VIN Supply Input.
2 GND Ground.
3 NC Not Internally Connected.
4 EN2
Enable Input (Regulator 2): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. 5 EN1
Enable Input (Regulator 1): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. 6 NC Not Internally Connected. 7 VOUT2 Regulator Output – LDO2. 8
VOUT1
Regulator Output – LDO1.
Absolute Maximum Ratings(1)
Supply Voltage (V IN).............................................0V to +6V Enable Input Voltage (V EN1, V EN2)..........................0V to V IN Internally Limited(3) Lead Temperature (soldering, 3c.).........................260°C Storage Temperature (T s).........................–65°C to +150°C ESD Sensitive(4)Operating Ratings(2)
Supply Voltage (V IN).....................................+2.3V to +5.5V Enable Input Voltage (V EN1, V EN2)..........................0V to V IN Junction Temperature (T J)........................–40°C to +125°C Junction Thermal Resistance
班级管理细则
2mm x 2mm Thin MLF-8 (θJA)...........................90°C/W
Electrical Characteristics(5)
V IN = V EN1 = V EN2 = V OUT + 1.0V, higher of the two regulator outputs; I OUT1 = I OUT2 = 100µA; C OUT1 = C OUT2 = 1µF;
T J = 25°C, bold values indicate –40°C < T J < +125°C; unless noted.
Parameter Condition Min
Typ
Max
秋天的景物Units
Variation from nominal V OUT –1.0
+1.0
% Output Voltage Accuracy
长高的药
Variation from nominal V OUT; –40°C to +125°C –2.0 +2.0 %
Line Regulation V IN = V OUT +1V to 5.5V; I OUT = 100µA 0.02 0.3
0.6%/V %/V
Load Regulation I OUT = 100µA to 300mA 0.2 0.5 %
Dropout Voltage I OUT = 50mA
I OUT = 300mA 20
120
40
240
mV
mV
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Ground Current V EN1 = High; V EN2 = Low; I OUT = 100µA to 300mA
V EN1 = Low; V EN2 = High; I OUT = 100µA to 300mA
V EN1 = V EN2 = High; I OUT1= 300mA, I OUT2 = 300mA 25
25
40
50
活着读后感800字50
75
µA
µA
µA
Ground Current in Shutdown V EN1 = V EN2 < 0.2V 0.01 1.0 µA
Ripple Rejection f = 1kHz; C OUT = 2.2µF
f = 20kHz; C OUT = 2.2µF 65
45
dB
dB
Current Limit V OUT = 0V 350 550 800 mA Output Voltage Noi C OUT=1µF; 10Hz to 100kHz 50 µV RMS Enable Inputs (EN1/EN2 )
Logic Low 0.2 V
Enable Input Voltage
Logic High 1.2 V
V IL≤ 0.2V 0.01 1.0 µA Enable Input Current
V IH≥ 1.2V 0.01 1.0 µA
Turn-on Time
Turn-on Time (LDO1 and 2) C OUT = 1µF (Enable of First LDO)
C OUT = 1µF (Enable of Second LDO after First Enabled) 140
110
500
学宪法
500
µs
µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T A (ambient temperature) is P D(max) = (T J(max) – T A) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD nsitive. Handling precautions recommended. Human body model, 1.5kΩ in ries with 100pF.
5. Specification for packaged product only.
Typical Characteristics
PSRR
PSRR
LOAD CURRENT (mA)
Dropout Voltage
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TEMPERATURE (°C)
Dropout Voltage
SUPPLY VOLTAGE (V)
Ground Current
LOAD CURRENT (mA)
Ground Current
Ground Current
TEMPERATURE (°C)
LOAD CURRENT (mA)
Output Voltage
Output Voltage
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Current Limit
Output Noi FREQUENCY (Hz)
Functional Characteristics
Functional Diagram
EN1
EN2
VIN
VOUT1
VOUT2
MIC5331 Block Diagram
