FAN5232MTC

FAN5232MTC Datasheet

FAN5232

Part	Datasheet
FAN5232MTC	FAN5232MTC (pdf)

Related Parts	Information
FAN5232MTCX	FAN5232MTCX

PDF Datasheet Preview
FAN5232 Adjustable PWM Buck Controller for LCD PCs • Three outputs Adjustable Buck, 3.3V-Always, 5V-Always • Adjustable synchronous switcher, 5V 80% Vin • 1% internal reference precision • Current mode with voltage feed-forward • Precision current limit option • Charge pump works at all loads • No shoot-through current • Independent shutdown pins for ACPI • Power Good, input UVLO, output OV • 5.6V to 24V input voltage range • LCD PCs • Notebook PCs and PDAs • Hand-held portable instruments The FAN5232 is a high and high precision DC/DC controller for PCs. It has a synchronous switcher whose output can be adjusted from 5V up to 80% of Vin. It also has two linear regulators for standby, 3.3V and 5V. The PWM utilizes both input and output voltage feedback in a current-mode control, allowing for fast and stable loop response over a wide range of input and output variations. Synchronous switching provides best over a wide range of loads. Current sense based on MOSFET RDS,on gives maximum while also permitting use of an optional sense resistor for high precision. The FAN5232 is available in a 14 pin TSSOP package. Block Diagram Vin = 3.3V-Always 5V-Always SDWN SDNADJ PWRGD FAN5232 12V 8A + FAN5232 Pin Assignments VBATT 3V_ALWAYS 5V_ALWAYS AGND SDWN SDNADJ PWRGD PRODUCT SPECIFICATION CPUMP ISNS PGND Pin Description Pin Number 1 2 Pin Name VBATT 3V_ALWAYS 5V_ALWAYS AGND SDWN SDNADJ PWRGD VFBSW PGND ISNS CPUMP Pin Function Description Battery Voltage. Battery voltage sensor. Ordering Information Product Number FAN5232MTC Package 14 Lead TSSOP DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, or c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 10/7/02 0.0m 003 Stock#DS30005232 2001 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FAN5232

Adjustable PWM Buck Controller for LCD PCs
• Three outputs Adjustable Buck, 3.3V-Always, 5V-Always
• Adjustable synchronous switcher, 5V 80% Vin
• 1% internal reference precision
• Current mode with voltage feed-forward
• Precision current limit option
• Charge pump works at all loads
• No shoot-through current
• Independent shutdown pins for ACPI
• Power Good, input UVLO, output OV
• 5.6V to 24V input voltage range
• LCD PCs
• Notebook PCs and PDAs
• Hand-held portable instruments

The FAN5232 is a high and high precision DC/DC controller for PCs. It has a synchronous switcher whose output can be adjusted from 5V up to 80% of Vin. It also has two linear regulators for standby, 3.3V and 5V. The PWM utilizes both input and output voltage feedback in a current-mode control, allowing for fast and stable loop response over a wide range of input and output variations. Synchronous switching provides best over a wide range of loads. Current sense based on MOSFET RDS,on gives maximum while also permitting use of an optional sense resistor for high precision.

The FAN5232 is available in a 14 pin TSSOP package.

Block Diagram

Vin =
3.3V-Always 5V-Always

SDWN SDNADJ PWRGD

FAN5232
12V 8A +

FAN5232

Pin Assignments

VBATT
3V_ALWAYS
5V_ALWAYS

AGND

SDWN

SDNADJ

PWRGD

PRODUCT SPECIFICATION

CPUMP

ISNS

PGND

Pin Description

Pin Number 1 2

Pin Name VBATT
3V_ALWAYS
5V_ALWAYS

AGND

SDWN

SDNADJ

PWRGD

VFBSW

PGND

ISNS

CPUMP

Pin Function Description

Battery Voltage. Battery voltage sensor.
Ordering Information

Product Number FAN5232MTC

Package 14 Lead TSSOP

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, or c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.

A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
10/7/02 0.0m 003 Stock#DS30005232 2001 Fairchild Semiconductor Corporation

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Datasheet ID: FAN5232MTC 513925