FAN5234_10 datasheet, PDF - EEWORLD Datasheet

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FAN5234_10: DescriptionSWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16; Categorysemiconductor Analog mixed-signal IC; File Size398KB，16 Pages; ManufacturerFairchild; Websitehttp://www.fairchildsemi.com/

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FAN5234_10 Overview

SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16

FAN5234_10 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	16
Rated input voltage	5 V
Maximum limit input voltage	5.25 V
Minimum limit input voltage	4.75 V
Maximum operating temperature	85 Cel
Minimum operating temperature	-10 Cel
Processing package description	TSSOP-16
Lead-free	Yes
EU RoHS regulations	Yes
state	ACTIVE
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.6500 mm
terminal coating	NICKEL PALLADIUM GOLD
Terminal location	DUAL
Packaging Materials	PLASTIC/EPOXY
Temperature level	OTHER
control mode	AVERAGE CURRENT
Control Technology	PULSE WIDTH MODULATION
Analog IC other types	SWITCHING CONTROLLER
Switch configuration	PUSH-PULL
Maximum switching frequency	690 kHz

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FAN5234 — Dual Mobile-Friendly PWM / PFM Controller

November 2010

FAN5234

Dual Mobile-Friendly PWM / PFM Controller

Features

Wide Input Voltage Range for Mobile Systems:

2V to 24V

Excellent Dynamic Response with Voltage Feed-

Forward and Average-Current-Mode Control

Lossless Current Sensing on Low-Side MOSFET or

Precision Over-Current via Sense Resistor

Under-Voltage Lockout

Power-Good Signal

Light-Load Hysteretic Mode Maximizes Efficiency

300KHz or 600KHz Operation

TSSOP16 Package

Description

The FAN5234 PWM controller provides high efficiency

and regulation with an adjustable output from 0.9V to

5.5V required to power I/O, chip-sets, memory banks, or

peripherals in high-performance notebook computers,

PDAs,

and

internet

appliances.

Synchronous

rectification and hysteretic operation at light loads

contribute to a high efficiency over a wide range of

loads. The Hysteretic Mode of operation can be

disabled if PWM Mode is desired for all load levels.

Efficiency is further enhanced by using the MOSFET’s

DS(ON)

as a current-sense component.

Feed-forward ramp modulation, average current mode

control, and internal feedback compensation provide

fast response to load transients. The FAN5234 monitors

these outputs and generates a PGOOD (power-good)

signal when the soft-start is completed and the output is

within ±10% of its set point. A built-in over-voltage

protection prevents the output voltage from going above

120% of the set point. Normal operation is automatically

restored when the over-voltage conditions cease.

Under-voltage protection latches the chip off when the

output drops below 75% of its set value after the soft-

start sequence is completed. An adjustable over-current

function monitors the output current by sensing the

voltage drop across the lower MOSFET.

Applications

Mobile PC Regulator

Handheld PC Power

Related Resources

Application Note — AN-6002 Component

Calculations and Simulation Tools for FAN5234

or FAN5236

Application Note — AN-1029 Maximum Power

Enhancement Techniques for SO-8 Power

MOSFET

Ordering Information

Part Number

FAN5234MTCX

Operating

Temperature

Range

-10 to +85°C

Package

16-Lead, Thin-Shrink Small-Outline Package (TSSOP)

Packing Method

Tape and Reel

FAN5234 • Rev. 2.0.0

www.fairchildsemi.com

FAN5234_10 Related Products

	FAN5234_10	FAN5234MTCX	FAN5234	MBR05S0L
Description	SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16	SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16	SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16	SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO16
Number of functions	1	1	1	1
Number of terminals	16	16	16	16
Rated input voltage	5 V	5 V	5 V	5 V
Maximum limit input voltage	5.25 V	5.25 V	5.25 V	5.25 V
Minimum limit input voltage	4.75 V	4.75 V	4.75 V	4.75 V
Maximum operating temperature	85 Cel	85 Cel	85 Cel	85 Cel
Minimum operating temperature	-10 Cel	-10 Cel	-10 Cel	-10 Cel
Processing package description	TSSOP-16	TSSOP-16	TSSOP-16	TSSOP-16
Lead-free	Yes	Yes	Yes	Yes
EU RoHS regulations	Yes	Yes	Yes	Yes
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE
packaging shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package Size	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount	Yes	Yes	Yes	Yes
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING
Terminal spacing	0.6500 mm	0.6500 mm	0.6500 mm	0.6500 mm
terminal coating	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD	NICKEL PALLADIUM GOLD
Terminal location	DUAL	DUAL	DUAL	DUAL
Packaging Materials	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
Temperature level	OTHER	OTHER	OTHER	OTHER
control mode	AVERAGE CURRENT	AVERAGE CURRENT	AVERAGE CURRENT	AVERAGE CURRENT
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Analog IC other types	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
Switch configuration	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL
Maximum switching frequency	690 kHz	690 kHz	690 kHz	690 kHz

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