Fairchild Semiconductor FAN5601 User's Manual
Summary
The FAN5601 is a high-efficiency, third-generation step-down charge pump DC/DC converter designed for stable low-voltage power delivery (2.2V–5.5V in, 1.0V–1.8V out). Optimized with proprietary Low EMI technology and advanced protections, it ensures reliability across battery-powered applications. This manual serves as a comprehensive technical resource, detailing electrical characteristics, absolute maximum ratings, and implementation guidelines for integrating the converter into portable electronic equipment like cell phones and handheld computers.
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FA 5601 R eg lated tep -D ow arg e P /D nverter
July 2005
FAN5601 Regulated Step-Down Charge Pump DC/DC Converter Features Description > 85% Peak Efficiency The FAN5601 is an advanced third generation switched capaci-
Low EMI tor step down DC/DC converter utilizing Fairchild’s proprietary Scalar Pump™ technology. This innovative architecture utilizes
Low Ripple
scalar switch re-configuration and fractional switching tech-
Output Voltage 1.3V/1.8V
niques to produce low output ripple, low ESR spikes and
Input Voltage Range: 2.2V to 5.5V improve efficiency over a wide load range. Output Current: Up to 250m A
The FAN5601 produces a fixed regulated output from 2.2V to
±2.5% Output Voltage Accuracy
5V input voltage. Customized output voltages are available in
A Operating Current 100m V increments from 1V to 1.8V. Contact marketing for cus-
< 1 A in Shutdown Mode tomized outputs.
CC 2MHz Operating Frequency In order to maximize efficiency, the FAN5601 achieves Shutdown Isolates Output from Input regulation by skipping pulses. Depending upon load current, the
Soft-Start Limits Inrush Current size of the switches is scaled dynamically, consequently, current spikes and EMI are minimized. An internal soft start circuitry
Short Circuit and Over Temperature Protection
prevents excessive current drawn from the supply. The device is
Minimum External Component Count
internally protected against short circuit and over temperature
6-Lead 3x3mm MLP Package conditions.
The FAN5601 is available in 6-lead 3x3mm MLP.
Applications
Scalar Pump is a registered trademark of Fairchild Semiconductor Corporation.
Cell Phones Handheld Computers Portable Electronic Equipment Core Supply to Next Generation Processors Low Voltage DC Bus Digital Cameras DSP Supplies
Typical Application
CB = 1µF
INPUT 2.2V to 5.5V C+ C-
OUTPUT 1.0V to 1.8V VIN VOUT
CIN = 10µF COUT = 10µF
ENABLE GND
©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5601 Rev. 1.0.5
Page Summary Contents For Fairchild Semiconductor FAN5601 User's Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 15 |
| File Size | 824.50 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What is the input voltage range for the FAN5601?
The acceptable input voltage range (IN) is 2.2V to 5.5V.
How efficient is the device, and what technology does it use?
It achieves up to 85% peak efficiency by utilizing Fairchild's proprietary Low EMI ScalarPump™ technology.
Are there specific protections built into the FAN5601?
Yes, it includes Short Circuit and Over Temperature Protection, and internal soft start circuitry minimizes inrush current spikes.
Where is this device typically used?
It is commonly applied in cell phones, handheld computers, digital cameras, and portable electronic equipment.