MIC5254 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – DUAL 150MA UCAP LDO WITH ERROR FLAG OUTPUTS

MIC5254
Micrel
MIC5254
Dual 150mA µCap LDO with Error Flag Outputs
General Description
The MIC5254 is an efficient, precise, dual CMOS voltage
regulator. It offers better than 1% initial accuracy, extremely
low dropout voltage (typically 135mV at 150mA) and low
ground current (typically 90µA) over load. The MIC5254
features two independent LDOs with error flags that indicate
an output fault condition such as overcurrent, thermal shut-
down and dropout.
Designed specifically for handheld and battery-powered de-
vices, the MIC5254 provides a TTL-logic-compatible enable
pin. When disabled, power consumption drops nearly to zero.
The MIC5254 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in handheld wireless devices.
Key features include current limit, thermal shutdown, faster
transient response, and an active clamp to speed up device
turnoff. The MIC5254 is available in the MSOP-10 package
and is rated over a –40°C to +125°C junction temperature
range.
Features
• Input voltage range: 2.7V to 6.0V
• Dual, independent 150mA LDOs
• Error flags indicate fault condition
• Stable with ceramic output capacitor
• Ultra-low dropout: 135mV @ 150mA
• High output accuracy:
1.0% initial accuracy
2.0% over temperature
• Low quiescent current: 90µA each LDO
• Tight load and line regulation
• Thermal shutdown and current limit protection
• “Zero” off-mode current
• TTL logic-controlled enable input
• MSOP-10 package
Applications
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
Typical Application
Ordering Information
Part Number
VOUTA VOUTB Junction Temp. Range
MIC5254-SJBMM
3.3V
2.5V
–40°C to +125°C
Other voltages available. Contact Micrel Marketing for details.
Package
MSOP-10
V_INA
1mF
V_INB
1mF
MIC5254
9 _{VINA OUTA} 10
2 _{ENA FLGA} 1
3 _{GNDA OUTB} 8
6 _{VINB FLGB} 4
5 _{ENB GNDB} 7
47kW
FLAGA
47kW
FLAGB
V_OUTA
1mF
Ceramic
V_OUTB
1mF
Ceramic
Dual Output LDO with Error Flags
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2003
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MIC5254