FAN5307MP15X FAIRCHILD [Fairchild Semiconductor], FAN5307MP15X Datasheet

FAN5307MP15X

Manufacturer Part Number

FAN5307MP15X

Description

High-Efficiency Step-Down DC-DC Converter

Manufacturer

FAIRCHILD [Fairchild Semiconductor]

Datasheet

1.FAN5307MP15X.pdf (13 pages)

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Part Number:

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FAN5307 Rev. 1.0.4

FAN5307

High-Efﬁciency Step-Down DC-DC Converter

Features

Applications

Typical Application

95% Efﬁciency, Synchronous Operation

Adjustable Output Voltage Option from 0.7V to V

2.5V to 5.5V Input Voltage Range

Customized Fixed Output Voltage Options

Up to 300mA Output Current

Fixed Frequency 1MHz PWM Operation

High Efﬁciency Power Save Mode

100% Duty Cycle Low Dropout Operation

Soft Start

Dynamic Output Voltage Positioning

15 A Quiescent Current

Excellent Load Transient Response

5-Lead SOT-23 Package

6-Lead MLP 3x3mm Package

Pocket PCs, PDAs

Cell Phones

Battery-Powered Portable Devices

Digital Cameras

Low Power DSP Supplies

General Description

The FAN5307, a high efﬁciency low noise synchronous

PWM current mode and Pulse Skip (Power Save) mode

DC-DC converter is designed for battery-powered appli-

cations. It provides up to 300mA of output current over a

wide input range from 2.5V to 5.5V. The output voltage

can be either internally ﬁxed or externally adjustable over

a wide range of 0.7V to 5.5V V

divider. Custom output voltages are also available. Con-

tact a Fairchild sales representative for customized out-

put voltage options.

At moderate and light loads pulse skipping modulation is

used. Dynamic voltage positioning is applied, and the

output voltage is shifted 0.8% above nominal value for

increased headroom during load transients. At higher

loads the system automatically switches to current mode

PWM control, operating at 1 MHz. A current mode con-

trol loop with fast transient response ensures excellent

line and load regulation. In Power Save mode, the quies-

cent current is reduced to 15 A in order to achieve high

efﬁciency and to ensure long battery life. In shut-down

mode, the supply current drops below 1 A. The device is

available in 5-lead SOT-23 and 6-lead MLP 3x3mm

packages.

100

0.01

EFFICIENCY vs. LOAD CURRENT

0.1

=2.5V

Load Current [mA]

OUT

=5.5V

= 1.8V

by an external voltage

=3.6V

January 2006

www.fairchildsemi.com

100

1000

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FAN5307MP15X Summary of contents

Page 1

FAN5307 High-Efﬁciency Step-Down DC-DC Converter Features 95% Efﬁciency, Synchronous Operation Adjustable Output Voltage Option from 0. 2.5V to 5.5V Input Voltage Range Customized Fixed Output Voltage Options Up to 300mA Output Current Fixed Frequency 1MHz PWM Operation High ...

Page 2

Pin Assignment Pin Description 5-Lead SOT-23 Pin No. Pin Name Pin Description 1 V Supply voltage input GND Ground Enable Input. Logic high enables the chip and logic low disables the chip and reduces supply current ...

Page 3

Absolute Maximum Ratings Parameter V IN Voltage on any other pin Thermal Resistance (Note 1) Lead Soldering Temperature (10 seconds) Storage Temperature Electrostatic Discharge (ESD) Protection Level (Note 2) Recommended Operating Conditions Parameter Supply Voltage Range Output Voltage Range, Adjustable ...

Page 4

General Electrical Characteristics V = 2.5V to 5.5V 200mA OUT otherwise noted. Typical values are at T Parameter Quiescent Current Shutdown Supply Current Enable High Input Voltage Enable Low Input Voltage En Input Bias ...

Page 5

Electrical Characteristics for Fixed 2.5V to 5.5V 200mA OUT otherwise noted. Typical values are at T Parameter PFM to PWM Transition Voltage (Note 4) PFM to PWM Transition Voltage (Note 4) ...

Page 6

Typical Performance Characteristics (T = 25° 10µ 10µ OUT LINE TRANSIENT RESPONSE EFFICIENCY vs. LOAD CURRENT V = 1.8V OUT 100 95 V =2. =5. ...

Page 7

Block Diagram DIGITAL SOFT START FB ERROR AMPLIFIER 0.5V GND IS OSC SLOPE COMPENSATION Detailed Operation Description The FAN5307 is a step-down converter operating in a current-mode PFM/PWM architecture with a typical switching frequency of 1MHz. At moderate to heavy ...

Page 8

N-channel rectiﬁer switch. The device stays in sleep mode until the output voltage falls below the low thresh- old. The FAN5307 enters the PWM mode as soon as the output voltage can no longer be regulated in PFM with constant ...

Page 9

Application Information Adjustable Output Voltage Version The output voltage for the adjustable version is set by the external resistor divider, as shown below: and is calculated as 0.5V 1 ------ - = + OUT ...

Page 10

Mechanical Dimensions 6-Lead 3x3mm MLP Package 0. TOP VIEW 0.8 MAX 0.10 C 0.08 C 0.05 0.00 SIDE VIEW SEATING PLANE PIN #1 IDENT 1 0.45 0.20 0.2 MIN 6 0.95 BOTTOM VIEW NOTES: A. CONFORMS TO JEDEC ...

Page 11

Mechanical Dimensions 5-Lead SOT-23 Package Symbol Inches Min Max A .035 .057 A1 .000 .006 B .008 .020 c .003 .010 D .106 .122 E .059 .071 e .037 BSC e1 .075 BSC H .087 .126 L .004 .024 0° ...

Page 12

... SOT-23 Tape and Reel 6-Lead 3x3mm MLP Tape and Reel 5-Lead SOT-23 Tape and Reel 6-Lead 3x3mm MLP Tape and Reel 5-Lead SOT-23 Tape and Reel 6-Lead 3x3mm MLP Tape and Reel 12 Order Code FAN5307S18X FAN5307MP18X FAN5307S15X FAN5307MP15X FAN5307SX FAN5307MPX www.fairchildsemi.com ...

Page 13

TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ® ACEx™ FAST ActiveArray™ FASTr™ Bottomless™ FPS™ Build it Now™ FRFET™ ...

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