FAN5601

FAN5601 Regulated Step-Down Charge Pump DC/DC Converter

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FAN5601 Regulated Step-Down Charge Pump DC/DC Converter

July 2005

FAN5601 Regulated Step-Down Charge Pump DC/DC Converter
Features
85% Peak Efficiency Low EMI Low Ripple Output Voltage 1.3V/1.8V Input Voltage Range: 2.2V to 5.5V Output Current: Up to 250mA 2.5% Output Voltage Accuracy 30 A Operating Current

Description
The FAN5601 is an advanced third generation switched capacitor step down DC/DC converter utilizing Fairchild s proprietary ScalarPumpTM technology. This innovative architecture utilizes scalar switch re-configuration and fractional switching techniques to produce low output ripple, low ESR spikes and improve efficiency over a wide load range. The FAN5601 produces a fixed regulated output from 2.2V to 5V input voltage. Customized output voltages are available in 100mV increments from 1V to 1.8V. Contact marketing for customized outputs. In order to maximize efficiency, the FAN5601 achieves regulation by skipping pulses. Depending upon load current, the size of the switches is scaled dynamically, consequently, current spikes and EMI are minimized. An internal soft start circuitry prevents excessive current drawn from the supply. The device is internally protected against short circuit and over temperature conditions. The FAN5601 is available in 6-lead 3x3mm MLP.
ScalarPumpTM is a registered trademark of Fairchild Semiconductor Corporation.

ICC 1 A in Shutdown Mode 2MHz Operating Frequency Shutdown Isolates Output from Input Soft-Start Limits Inrush Current Short Circuit and Over Temperature Protection Minimum External Component Count 6-Lead 3x3mm MLP Package

Applications
Cell Phones Handheld Computers Portable Electronic Equipment Core Supply to Next Generation Processors Low Voltage DC Bus Digital Cameras DSP Supplies

Typical Application

CB 1 F

VIN CIN 10 F

FAN5601

INPUT 2.2V to 5.5V

CVOUT

OUTPUT 1.0V t o 1.8V

ENABLE GND

COUT 10 F

2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5601 Rev. 1.0.5