MIC5254_07 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Dual 150mA μCap LDO with Error Flag Outputs

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
devices, 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 10-pin
MSOP package and is rated over a –40°C to +125°C
junction temperature range.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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
• 10-pin MSOP package
Applications
• Cellular phones and pagers
• Cellular accessories
• Battery-powered equipment
• Laptop, notebook, and palmtop computers
• Consumer/personal electronics
___________________________________________________________________________________________________________
Typical Application
V_INA
1µF
V_INB
1µF
MIC5254
9
10
VINA OUTA
2 _{ENA FLGA} 1
3 _{GNDA OUTB} 8
6 _{VINA FLGB} 4
5 _{ENB GNDB} 7
FLGA
FLGB
V_OUTA
1µF
Ceramic
V_OUTB
1µF
Ceramic
Dual Output LDO with Error Flag
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
December 2007
M9999-121107