FAN1951D18X

FAN1951D18X Datasheet

FAN1950/FAN1951

Part	Datasheet
FAN1951D18X	FAN1951D18X (pdf)

Related Parts	Information
FAN1951D25X	FAN1951D25X

PDF Datasheet Preview
FAN1950/FAN1951 1.5A Low-Voltage Low-Dropout Regulator • 1.5A minimum guaranteed output current • 500mV maximum dropout at 1.5A Ideal for 2.5V to 1.8V or 1.65V conversion Ideal for 3.0V to 2.5V conversion • Current Limiting and Thermal shutdown • External Shut-down control FAN1951 only • Error output FAN1951 only • Fast transient response • Low ground current • General purpose conversion for low-voltage CPUs, DSP and FPGAs • SMPS post regulator • Cable/Satellite set-top boxes • PCI Graphics adapter cards The FAN1950 and FAN1951 are 1.5A low-dropout linear regulators that provide a low voltage, high current output with a minimum of external components. Both of these devices use a PNP output pass element achieving a maximum 500mV dropout at 1.5A load current. In addition these devices offer overcurrent limit and thermal shutdown features to ensure full protection. The FAN1951 offers a logic level enable pin and an error output to indicate undervoltage and over-current conditions. 1.8V and 2.5V output versions are available. 3.3V, 1.65V and 1.5V options are available upon request. FAN1950-2.5V FAN1951-1.8V 3.0V 2.5V IN OUT 10µF 2.5V IN OUT Error Output On/Off FLAG EN GND 1.8V 10µF FAN1950/FAN1951 Pin Assignments FAN1950Dx FRONT VIEW FAN1951Dx FRONT VIEW 1 2 3 45 IN GND TAB OUT EN IN GND TAB OUT FLAG 3-Lead Plastic TO-252 DPAK 5-Lead Plastic TO-252 DPAK Pin Descriptions Pin Number FAN1950 FAN1951 Pin Name EN FLAG Pin Function Description Enable Input TTL/CMOS compatible input. Logic HIGH enables the output Input Supply Voltage Ground. This pin and TAB are ground. Output Voltage Error Flag Output . Open-collector output. Active-low indicates an output fault condition. Ordering Information Part Number FAN1951D18X FAN1951D25X FAN1950D25X Output Voltage 1.8V 2.5V 2.5V Note Please contact sales for other voltage and package options. Package 5 Lead TO-252 DPAK in Tape and Reel 5 Lead TO-252 DPAK in Tape and Reel 3 Lead TO-252 DPAK in Tape and Reel 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, and 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 a significant injury of the user. A critical component in 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. 8/30/04 0.0m 005 Stock#DS30001950 2003 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FAN1950/FAN1951
1.5A Low-Voltage Low-Dropout Regulator
• 1.5A minimum guaranteed output current
• 500mV maximum dropout at 1.5A

Ideal for 2.5V to 1.8V or 1.65V conversion Ideal for 3.0V to 2.5V conversion
• Current Limiting and Thermal shutdown
• External Shut-down control FAN1951 only
• Error output FAN1951 only
• Fast transient response
• Low ground current
• General purpose conversion for low-voltage CPUs, DSP and FPGAs
• SMPS post regulator
• Cable/Satellite set-top boxes
• PCI Graphics adapter cards

The FAN1950 and FAN1951 are 1.5A low-dropout linear regulators that provide a low voltage, high current output with a minimum of external components. Both of these devices use a PNP output pass element achieving a maximum 500mV dropout at 1.5A load current. In addition these devices offer overcurrent limit and thermal shutdown features to ensure full protection.

The FAN1951 offers a logic level enable pin and an error output to indicate undervoltage and over-current conditions. 1.8V and 2.5V output versions are available. 3.3V, 1.65V and 1.5V options are available upon request.

FAN1950-2.5V

FAN1951-1.8V
3.0V
2.5V

IN OUT
10µF
2.5V IN OUT

Error Output On/Off

FLAG

EN GND
1.8V 10µF

FAN1950/FAN1951

Pin Assignments

FAN1950Dx FRONT VIEW

FAN1951Dx FRONT VIEW
1 2 3 45

IN GND TAB

OUT EN IN

GND TAB OUT

FLAG
3-Lead Plastic TO-252 DPAK
5-Lead Plastic TO-252 DPAK

Pin Descriptions

Pin Number

FAN1950 FAN1951

Pin Name EN

FLAG

Pin Function Description

Enable Input TTL/CMOS compatible input. Logic HIGH enables the output

Input Supply Voltage

Ground. This pin and TAB are ground.

Output Voltage

Error Flag Output . Open-collector output. Active-low indicates an output fault condition.
Ordering Information

Part Number FAN1951D18X FAN1951D25X FAN1950D25X

Output Voltage 1.8V 2.5V 2.5V

Note Please contact sales for other voltage and package options.

Package 5 Lead TO-252 DPAK in Tape and Reel 5 Lead TO-252 DPAK in Tape and Reel 3 Lead TO-252 DPAK in Tape and Reel

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, and 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 a significant injury of the user.

A critical component in 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.
8/30/04 0.0m 005 Stock#DS30001950 2003 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived FAN1951D18X Datasheet file may be downloaded here without warranties.

Datasheet ID: FAN1951D18X 513880