MIC5331
Micro-Power High Performance
Dual 300mA ULDO
General Description Features
The MIC5331 is a tiny dual low quiescent current LDO
2.3V to 5.5V input voltage range
ideal for applications that are power sensitive. The
300mA output current per LDO
MIC5331 integrates two high performance, 300mA LDOs
Very low quiescent current: 25A per LDO
into a tiny 2mm x 2mm Thin MLF package, which
High PSRR - >65dB on each LDO
occupies less PC board area than a single SOT-23
package. Stable with 1F ceramic output capacitors
The MIC5331 is designed to reject input noise and provide Tiny 8-pin 2mm x 2mm Thin MLF package
low output noise with fast transient response to any load
Ultra-low dropout voltage 120mV @ 300mA
change quickly even though it is a low quiescent current
Low output voltage noise 50Vrms
part. This combination of PSRR, low noise and transient
Thermal shutdown protection
response along with low power consumption makes for a
Current limit protection
very high performance, yet general purpose product.
The MIC5331 is a Cap design, operating with very small
ceramic output capacitors, which reduces required board
Applications
space and component cost; and it is available in fixed
Camera phones
output voltages in the tiny 8-pin 2mm x 2mm Thin MLF
leadless package. Mobile phones
Data sheets and support documentation can be found on PDAs
Micrels web site at: www.micrel.com.
GPS receivers
Portable devices
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Typical Application
MIC5331-xxYMT
VOUT1
VIN I/O
CORE
EN1 VOUT2
VBAT EN2
Camera DSP
1F 1F 1F
GND
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 Micrel, Inc. MIC5331
Ordering Information
Manufacturing Junction
Part Number Marking Voltage Package
Part Number Temperature Range
MIC5331-1.8/1.2YMT MIC5331-G4YMT UG4 1.8V/1.2V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-2.5/1.2YMT MIC5331-J4YMT UJ4 2.5V/1.2V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-2.8/2.8YMT MIC5331-MMYMT UMM 2.8V/2.8V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-2.8/2.85YMT MIC5331-MNYMT UMN 2.8V/2.85V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-2.85/2.85YMT MIC5331-NNYMT UNN 2.85V/2.85V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-3.0/2.8YMT MIC5331-PMYMT UPM 3.0V/2.8V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-3.0/2.85YMT MIC5331-PNYMT UPN 3.0V/2.85V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
MIC5331-3.0/3.0YMT MIC5331-PPYMT UPP 3.0V/3.0V 40 to +125C 8-Pin 2mm x 2mm Thin MLF
Note: Other voltage options available. Contact Micrel for details.
Pin Configuration
VIN 1 8 VOUT1
GND 2 7 VOUT2
NC 3 6 NC
EN2 4 5 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.
M9999-021408-A
February 2008 2