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CMPWR120

California Micro Devices
Part Number CMPWR120
Manufacturer California Micro Devices
Description 250mA / 3.3V SmartOR POWER REGULATOR
Published Oct 13, 2014
Detailed Description CALIFORNIA MICRO DEVICES CMPWR120 250mA / 3.3V SmartOR™ POWER REGULATOR Features • Automatic detection of V CC input s...
Datasheet PDF File CMPWR120 PDF File

CMPWR120
CMPWR120

Overview
CALIFORNIA MICRO DEVICES CMPWR120 250mA / 3.
3V SmartOR™ POWER REGULATOR Features • Automatic detection of V CC input supply • Drive output logic to control external switch • Glitch-free output during supply transitions • 250mA output maximum load current • Built-in hysteresis during supply selection • Controller operates from either V CC or V OUT • 8-pin SOIC narrow package Applications • PCI adapter cards • Network Interface Cards (NIC’s) • Dual power systems • Systems with standby capabilities • See Application Note AP211 Product Description California Micro Devices’ SmartORTM CMPWR120 is a low dropout regulator that delivers up to 250mA of load current at a fixed 3.
3V output.
An internal threshold level (typically 4.
1V) is used to prevent the regulator from being operated below dropout voltage.
The device continuously monitors the input supply and will automatically disable the regulator when VCC falls below the threshold level.
When the regulator is disabled, the control signal “Drive” (Active Low) is enabled, which allows an external PMOS switch to power the load from an auxiliary 3.
3V supply.
When VCC is restored to a level above the select threshold, the control signal for the external PMOS switch is disabled and the regulator is once again enabled.
All the necessary control circuitry needed to provide a smooth and automatic transition between the supplies has been incorporated.
This allows VCC to be dynamically switched without loss of output voltage.
PIN DIAGRAM, APPLICATION CIRCUIT, AND ELECTRICAL SCHEMATIC MGSF1P02ELT1 Top View + VCC NC NC GND 1 2 3 4 8 7 6 5 DRIVE – VAUX 3.
3V GND CMPWR120 VCC + VOUT VOUT NC + DRIVE VOUT GND + CIN 1µF VOUT 3.
3V 200mA COUT 4µ7 GND CMPWR120 8-Pin SOIC Narrow VCC – 5V Pin Diagram Typical Application Circuit VCC DRIVE + DESELECT 4.
1V GND – VREF 3.
3V + – ENABLE VOUT 3.
3V 200mA Simplified Electrical Schematic ©2001 California Micro Devices Corp.
All rights reserved.
SmartOR™ is a trademark of California ...


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