FAN5602_07 FAIRCHILD [Fairchild Semiconductor], FAN5602_07 Datasheet

FAN5602_07

Manufacturer Part Number

FAN5602_07

Description

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

Manufacturer

FAIRCHILD [Fairchild Semiconductor]

Datasheet

1.FAN5602_07.pdf (14 pages)

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FAN5602 Rev. 1.5.0

FAN5602 — Universal (Step-Up/Step-Down)

Charge Pump Regulated DC/DC Converter

Features

■

Applications

■

Ordering Information

Note:

1. Reference MLP08D Option B ONLY.

Application Diagram

FAN5602MP33X

FAN5602MP45X

FAN5602MP5X

Low-Noise, Constant-Frequency Operation at Heavy

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 V

±3% Output Voltage Accuracy

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

Cell Phones

Handheld Computers

Portable RF Communication Equipment

Core Supply to Low-Power Processors

Low-Voltage DC Bus

DSP Supplies

< 1µA in Shutdown Mode

Part Number

Input 2.7V to 5.5V

3x3mm 8-Lead MLP

= 3.6V

Figure 2. Typical Application Diagram

GND

Package

C2+

C2-

FAN5602

(1)

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 topolo-

gies. 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 possi-

ble topology. Only two 1µF bucket capacitors and one

10µF 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 out-

put 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.

C1-

C1+

Pb-Free

ENABLE

Yes

OUT

Output Voltage, V

3.3V

4.5V

5.0V

www.fairchildsemi.com

March 2007

NOM

Related parts for FAN5602_07

FAN5602_07 Summary of contents

Page 1

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

Page 2

Block Diagram BAND GAP SOFT-START CURRENT SENSE Light load FB EN PFM BG REF MODE V IN 150mV SC V OUT 1.6V UVLO V IN OSCILLATOR © 2005 Fairchild Semiconductor Corporation FAN5602 Rev. 1.5 ENABLE C1- FB ERROR ...

Page 3

Pin Assignments Pin Descriptions Pin # Name 1 V Supply Voltage Input C2+ Bucket Capacitor2. Positive Connection. 3 C2- Bucket Capacitor2. Negative Connection. 4 GND Ground 5 C1- Bucket Capacitor1. Negative Connection Regulated Output Voltage. Bypass ...

Page 4

Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera- ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi- tion, ...

Page 5

DC Electrical Characteristics V = 2.7V to 5.5V 1µ Typical values are 25°C. A Symbol Parameter Input Under-Voltage V UVLO Lockout V Output Voltage OUT I Quiescent Current Q ...

Page 6

Typical Performance Characteristics T = 25° 4.5V unless otherwise noted. A OUT 180 160 140 120 100 1.5 2.5 3.5 Input Voltage (V) Figure 4. Quiescent Current vs. Input Voltage 4.55 4.50 I ...

Page 7

Typical Performance Characteristics T = 25°C and V = 4.5V unless otherwise noted. A OUT 5 4.5 4 3.5 3 Load Current = 10mA Load Current = 50mA Load Current = 100mA 2.5 Load Current = 150mA Load Current = ...

Page 8

Typical Performance Characteristics T = 25° 3.3V unless otherwise noted. A OUT © 2005 Fairchild Semiconductor Corporation FAN5602 Rev. 1.5.0 (Continued OUT Time (10 s/div) µ Figure 15. Load Transient ...

Page 9

Typical Performance Characteristics T = 25° 10µ OUT = I = 200mA OUT V = 2.5V IN Time (100 µs/div) Figure 18. Output Ripple I = 200mA OUT V = 4.2V IN Time (100 ...

Page 10

Functional Description FAN5602 is a high-efficiency and low-noise switched capacitor DC/DC converter capable of step-up and step- down operations. It has seven built-in switch configura- tions. Based on the ratio of the input voltage to the output voltage, the FAN5602 ...

Page 11

Switch Array Modes TOP C1+ S1A S2A MID C1- GND Figure 24. Mode 1 (1:1) TOP S1A S1B C1+ S2A S2B MID C1 S3A S3B C1- S4A S4B Figure 26. Mode 3 (1:2 or 2:1) All Switches Set for Phase ...

Page 12

Application Information Using the FAN5602 to Drive LCD Backlighting The FAN5602 4.5V option is ideal for driving the back- lighting and flash LEDs for portable devices. One FAN5602 device can supply the roughly 150mA needed to power both the backlight ...

Page 13

Package Dimensions Dimensions are in millimeters unless otherwise noted. Figure 29. 8-Lead 3x3mm Molded Leadless Package (MLP), .8mm Thick © 2005 Fairchild Semiconductor Corporation FAN5602 Rev. 1.5.0 13 www.fairchildsemi.com ...

Page 14

Fairchild Semiconductor Corporation FAN5602 Rev. 1.5.0 14 www.fairchildsemi.com ...

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