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Fairchild Semiconductor - Regulated Step-Down Charge Pump DC/DC Converter

Numéro de référence FAN5601
Description Regulated Step-Down Charge Pump DC/DC Converter
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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FAN5601 fiche technique
July 2005
www.DataSheet4U.com
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
30µA Operating Current
ICC < 1µA 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
Description
The FAN5601 is an advanced third generation switched capaci-
tor step down DC/DC converter utilizing Fairchild’s proprietary
ScalarPump™ technology. This innovative architecture utilizes
scalar switch re-configuration and fractional switching tech-
niques 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 cus-
tomized 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.
ScalarPumpis a registered trademark of Fairchild Semiconductor Corporation.
CB = 1µF
INPUT 2.2V to 5.5V
CIN = 10µF
C+
VIN
C- OUTPUT 1.0V t o 1.8V
VOUT
ENABLE GND
COUT = 10µF
©2005 Fairchild Semiconductor Corporation
FAN5601 Rev. 1.0.5
1
www.fairchildsemi.com

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