MIC5331: Micro-Power High Performance Dual 300mA ULDOâ„¢0 pages

MIC5331
Micro-Power High Performance
Dual 300mA ULDO™
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
February 2008 M9999-021408-A
General Description
The MIC5331 is a tiny dual low quiescent current LDO
ideal for applications that are power sensitive. 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 noise and provide
low output noise with fast transient response 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 MIC5331 is a ìCap 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: www.micrel.com.
Features
• 2.3V to 5.5V input voltage range
• 300mA output current per LDO
• Very low quiescent current: 25ìA per LDO
• High PSRR - >65dB on each LDO
• Stable with 1ìF ceramic output capacitors
• Tiny 8-pin 2mm x 2mm Thin MLF® package
• Ultra-low dropout voltage – 120mV @ 300mA
• Low output voltage noise – 50ìVrms
• Thermal shutdown protection
• Current limit protection
Applications
• Camera phones
• Mobile phones
• PDAs
• GPS receivers
• Portable devices
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Typical Application
MIC5331-xxYMT
I/O
CORE
Camera DSP
VIN
EN2
VOUT1
VOUT2
GND
EN1
1ìF
VBAT
1ìF 1ìF
Camera DSP Power Supply Circuit