TC1268 Datasheet, PDF (1/12 Pages) Microchip Technology – 500mA Fixed Output, Fast Response CMOS LDO with Shutdown

TC1268
500mA Fixed Output, Fast Response CMOS LDO with Shutdown
Features
• Very Low Dropout Voltage
• 500mA Output Current
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Over Current and Over Temperature Protection
• SHDN Input for Active Power Management
• ERROR Output to Detect Low Battery
• 5µsec (typical) Wake-up Time from SHDN
Applications
• RAMBUS Memory Module
• Battery-Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulator for SMPS
• Pagers
• Digital Cameras
Device Selection Table
Output*
Part Number Voltage Package
(V)
Junction
Temp. Range
TC1268-2.5VOA 2.5 8-Pin SOIC -40°C to +125°C
*Other output voltages and package options are available.
Please contact Microchip Technology Inc. for details.
Package Type
8-Pin SOIC
V_OUT 1
GND 2
NC 3
BYPASS 4
TC1268
8 VIN
7 NC
6 SHDN
5 ERROR
General Description
The TC1268 is a fixed output, fast turn-on, high
accuracy (typically ±0.5%) CMOS low dropout
regulator. Designed specifically for battery-operated
systems, the TC1268’s CMOS construction eliminates
wasted ground current, significantly extending battery
life. Total supply current is typically 80µA at full load (20
to 60 times lower than in bipolar regulators).
TC1268’s key features include ultra low noise, very low
dropout voltage (typically 350mV at full load), and
fast response to step changes in load. The TC1268
also has a fast wake-up response time (5µsec typically)
when released from shutdown. The TC1268
incorporates both over temperature and over current
protection. The TC1268 is stable with an output
capacitor of only 1µF and has a maximum output
current of 500mA.
Typical Application
V_IN
V_IN
V_{OUT +}
V_OUT
TC1268
C_OUT
1µF
GND
SHDN
SHDN
© 2002 Microchip Technology Inc.
DS21379B-page 1