FAN5602 -- Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter

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FAN5602 -- Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter

May 2007

FAN5602 -- Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter
Features
Low-Noise, Constant-Frequency Operation at Heavy

Description
The FAN5602 is a universal switched capacitor DC/DC converter capable of step-up or step-down operation. Due to its unique adaptive fractional switching topology, the device achieves high efficiency over a wider input/ output voltage range than any of its predecessors. The FAN5602 utilizes resistance-modulated loop control, which produces lower switching noise than other topologies. Depending upon actual load conditions, the device automatically switches between constant-frequency and pulse-skipping modes of operation to extend battery life. The FAN5602 produces a fixed regulated output within the range of 2.7V to 5.5V from any type of voltage source. High efficiency is achieved under various input/ output voltage conditions because an internal logic circuit automatically reconfigures the system to the best possible topology. Only two 1 F bucket capacitors and one 10 F output capacitor are needed. During power on, soft-start circuitry prevents excessive current drawn from the supply. The device is protected
against short-circuit and over-temperature conditions. The FAN5602 is available with 3.3V, 4.5V, and 5.0V output voltage. Any other output voltage option within the 1.5V to 5V range is available upon request. The FAN5602 is available 3x3mm 8-lead MLP packages.

Load High-Efficiency, Pulse-Skip (PFM) Operation at Light Load Switch Configurations (1:3, 1:2, 2:3, 1:1, 3:2, 2:1, 3:1) 92% Peak Efficiency Input Voltage Range: 2.7V to 5.5V Output Current: 3.3V, 200mA at VIN 3.6V 3% Output Voltage Accuracy ICC 1 A in Shutdown Mode 1MHz Operating Frequency Shutdown Isolates Output from Input Soft-Start Limits Inrush Current at Start-up Short-Circuit and Over-Temperature Protection Minimum External Component Count No Inductors

Applications
Cell Phones Handheld Computers Portable RF Communication Equipment Core Supply to Low-Power Processors Low-Voltage DC Bus DSP Supplies

Ordering Information
Part Number
FAN5602MP33X FAN5602MP45X

Package(1)
3x3mm 8-Lead MLP 3x3mm 8-Lead MLP

Pb-Free
Yes Yes Yes

Output Voltage, VNOM
3.3V 4.5V 5.0V

FAN5602MP5X 3x3mm 8-Lead MLP Note: 1. Reference MLP08D Option B ONLY.

Application Diagram
Input 2.7V to 5.5V VIN ENABLE

1
CIN CB
C2C2

2 3 4

FAN5602

8 6 7 5

C1

VOUT

COUT

GND

C1-

Figure 2. Typical Application Diagram
2005 Fairchild Semiconductor Corporation FAN5602 Rev. 1.5.1 www.fairchildsemi.com

FAN5602 Datasheet Fairchild Download PDF

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FAN5602 DATASHEET