MIC5355/6
Dual 500mA Cap Low Dropout,
Micropower Linear Regulator
General Description Features
The MIC5355/6 is an advanced dual, micropower, low
2.5V to 5.5V input voltage range
dropout linear regulator. The MIC5355/6 provides low
2% initial output accuracy
quiescent current operation, using only 70 A with both
Wide output voltage range: 1.0V to 3.3V
outputs enabled making it ideal for battery-powered
Low quiescent current: 38A per output
systems. In shutdown, the quiescent current drops to less
than 1A. The MIC5355/6 provides two independently- Very low quiescent current in shutdown: <1 A typical
controlled high-performance 500mA LDOs with typical
Cap stable with 2.2F ceramic capacitor
dropout voltage of 350mV at rated load. In addition, the
Low dropout voltage: 350mV at 500mA
MIC5355/6 is optimized to provide fast load and line
Excellent load/line transient response
transient performance with low-ESR ceramic output
Independent logic controlled enable pins
capacitors, requiring a minimum of only 2.2F.
Output discharge circuit: MIC5356
The MIC5356 also incorporates an active discharge
feature when the part is disabled that switches in a 30
Current and thermal limit protection
load to pull down the output of the regulator. The
Power 8-pin ePad MSOP package or 8-pin ePad 3mm
MIC5355/6 is available in fixed output voltages in a
x 3mm MLF package
thermally-enhanced 8-pin ePad MSOP package or 8-pin
ePad 3mm x 3mm MLF package.
Applications
Data sheets and support documentation can be found on
Micrels web site at www.micrel.com.
Smart phones
GPS, PMP, DSC
Notebooks and desktops
Digital TV
Portable electronics
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Typical Application
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 Micrel, Inc. MIC5355/6
Ordering Information
Junction
Manufacturer Ordering (1) Marking (2)
Part Number Voltage Temperature Package
Part Number Code
Range
MIC5355-SGYMME MIC5355-3.3/1.8YMME 55SG 3.3V/1.8V 40 to +125C 8-Pin ePad MSOP
MIC5355-S4YMME MIC5355-3.3/1.2YMME 55S4 3.3V/1.2V 40 to +125C 8-Pin ePad MSOP
MIC5355-SCYMME MIC5355-3.3/1.0YMME 55SC 3.3V/1.0V 40 to +125C 8-Pin ePad MSOP
MIC5355-G4YMME MIC5355-1.8/1.2YMME 55G4 1.8V/1.2V 40 to +125C 8-Pin ePad MSOP
MIC5355-JGYMME
MIC5355-2.5/1.8YMME 55JG 2.5V1.8V 40 to +125C 8-Pin ePad MSOP
MIC5356-SGYMME MIC5356-3.3/1.8YMME 56SG 3.3V/1.8V 40 to +125C 8-Pin ePad MSOP
MIC5356-S4YMME MIC5356-3.3/1.2YMME 56S4 3.3V/1.2V 40 to +125C 8-Pin ePad MSOP
MIC5356-SCYMME MIC5356-3.3/1.0YMME 56SC 3.3V/1.0V 40 to +125C 8-Pin ePad MSOP
MIC5356-G4YMME MIC5356-1.8/1.2YMME 56G4 1.8V/1.2V 40 to +125C 8-Pin ePad MSOP
MIC5356-JGYMME MIC5356-2.5/1.8YMME 56JG 2.5V/1.8V 40 to +125C 8-Pin ePad MSOP
MIC5356-MMYML MI5356-2.8/2.8YML M3M 2.8V/2.8V 40 to +125C 8-Pin ePad 3mm x 3mm MLF
MIC5356-MGYML
MI5356-2.8/1.8YML M3G 2.8V/1.8V 40 to +125C 8-Pin ePad 3mm x 3mm MLF
Notes:
1. MIC5356 offers Auto-Discharge function.
2. Other voltage available. Contact Micrel for detail.
Pin Configuration
8-Pin ePad 3mm x 3mm MLF (ML)
8-Pin ePad MSOP (MME)
Pin Description
Pin Number Pin Name Pin Function
1 VIN Supply Input.
2 GND Ground.
3 NC Not internally connected.
4 EN2 Enable Input LDO2. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
5 EN1 Enable Input LDO1. Active High Input. Logic High = On; Logic Low = Off; Do not leave floating.
6 NC Not internally connected.
7 VOUT2 LDO2 Output.
8 VOUT1 LDO1 Output.
ePad HSPAD Heatsink pad. Connect to ground.
M9999-031512-A
March 2012 2