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PDF FAN1951D25X Data sheet ( Hoja de datos )
| Número de pieza | FAN1951D25X | |
| Descripción | 1.5A Low-Voltage Low-Dropout Regulator | |
| Fabricantes | Fairchild Semiconductor | |
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www.fairchildsemi.com
FAN1950/FAN1951
1.5A Low-Voltage Low-Dropout Regulator
Features
• 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 flag output (FAN1951 only)
• Fast transient response
• Low ground current
Applications
• General purpose conversion for low-voltage CPUs,
DSP and FPGAs
• SMPS post regulator
• Cable/Satellite set-top boxes
• PCI Graphics adapter cards
General Description
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 maxi-
mum 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
flag output to indicate undervoltage and over-current condi-
tions. 1.8V and 2.5V fixed output versions are available.
3.3V, 1.65V and 1.5V options are available upon request.
Typical Application
FAN1950-2.5V
FAN1951-1.8V
3.0V
2.5V
IN OUT
GND
10µF
2.5V IN OUT
100KΩ
Error Output
On/Off
FLAG
EN
GND
1.8V
10µF
REV. 0.1.6 8/30/04
1 page  
Typical Performance Characteristics
0.6
0.5
0.4
0.3
0.2
0.1
0
0.5
Dropout Voltage vs. Output Current
+125°C
+25°C
-40°C
-10°C
+75°C
0.7 0.9 1.1 1.3
Load Current (A)
1.5
25.00
20.00
15.00
10.00
5.00
0.00
0
Ground Current vs. Load Current
Vin = Vout + 1V, 25°C
I gnd (mA)
500
1000
1500
Load Current (mA)
2000
FAN1950/FAN1951
0.6
0.5
0.4
0.3
0.2
0.1
0
-50
Dropout Voltage vs. Temperature
IL = 1.5A
IL = 1A
0 50 100
Tj
Vout = 2.5V, 1.8V, Iout = 1A, 1.5A
150
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
Ground Current vs. Supply Voltage
Vin = Vout + 1V, 25°C
5 10 15
Vin (V)
Iout = 10mA
20
REV. 0.1.6 8/30/04
5
5 Page 
FAN1950/FAN1951
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:
1. 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.
2. 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.
www.fairchildsemi.com
8/30/04 0.0m 005
Stock#DS30001950
2003 Fairchild Semiconductor Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FAN1951D25X.PDF ] | |
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