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FAN2500 Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer FAN2500
Beschreibung 100 mA CMOS LDO Regulators
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 10 Seiten
FAN2500 Datasheet, Funktion
FAN2500, FAN2501
100 mA CMOS LDO Regulators
www.fairchildsemi.com
Features
• Ultra Low Power Consumption
• 100 mV dropout voltage at 100 mA
• 25 µA ground current at 100 mA
• Enable/Shutdown Control
• SOT23-5 package
• Thermal limiting
• 300 mA peak current
Applications
• Cellular Phones and accessories
• PDAs
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers
Description
The FAN2500/01 family of micropower low-dropout voltage
regulators utilize CMOS technology to offer a new level of
cost-effective performance in GSM and TDMA cellular
handsets, Laptop and Notebook portable computers, and
other portable devices. Features include extremely low
power consumption and low shutdown current, low dropout
voltage, exceptional loop stability able to accommodate a
Block Diagrams
VIN
Bandgap
EN
Error
Amplifier
p
VOUT
ADJ
FAN2500
Thermal
Sense
GND
VIN
Bandgap
wide variety of external capacitors, and the compact SOT23-5
surface-mount package. The FAN2500/01 family of products
offer significant improvements over older BiCMOS designs
and are pin-compatible with many popular devices. The
output is thermally protected against overload.
The FAN2500 and FAN2501 devices are distinguished by
the assignment of pin 4:
FAN2500: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2500-XX: pin 4 – BYP, to which a bypass capacitor
may be connected for optimal noise performance. Output
voltage is fixed, indicated by the suffix XX.
FAN2501-XX: pin 4 – ERR, a flag which indicates that the
output voltage has dropped below the specified minimum
due to a fault condition.
The standard fixed output voltages available are 2.5V, 2.6V,
2.7V, 2.8V, 2.85V, 3.0V, and 3.3V. Custom output voltage are
also available: please contact your local Fairchild Sales
Office for information.
VIN
Bandgap
EN
Error
Amplifier
p
BYP
VOUT
FAN2500-XX
EN
Error
Amplifier
p
Thermal
Sense
ERR
VOUT
GND
FAN2501-XX
Thermal
Sense
GND
REV. 1.0.6 2/14/03






FAN2500 Datasheet, Funktion
PRODUCT SPECIFICATION
FAN2500/FAN2501
Electrical Characteristics (Notes 1, 2)
Symbol
Parameter
Regulator
VDO Drop Out Voltage
VO Output Voltage Accuracy
VDO Reference Voltage Accuracy, Adjustable
Mode
VO3
Output Voltage Accuracy, Adjustable Mode
IGND
Ground Pin Current
Protection
Current Limit
IGSD
Shut-Down Current
TSH Thermal Protection Shutdown Temperature
ETL ERR Trip Level
Enable Input
VIL Logic Low Voltage
VIH Logic High Voltage
IIH Input Current High
II Input Current Low
Switching Characteristics (Notes 1, 2)
Parameter
Enable Input4
Response time
Error Flag (FAN2501-XX)
Response time
Conditions
Conditions
IOUT = 100 µA
IOUT = 50 mA
IOUT = 100 mA
IOUT = 100 mA
EN = 0V
FAN2501 only
Min.
Min. Typ. Max. Units
2.5 4
50 75
100 140
-2 2
1.24 1.32 1.40
-6 6
50
mV
mV
mV
%
V
%
µA
Thermally Protected
150
90 95
1
99
µA
°C
%
1.2 0.4
V
2.0 1.4
V
1 µA
1 µA
Typ.
Max.
500
3
Unit
µsec
msec
Performance Characteristics (Notes 1, 2)
Symbol
Parameter
Conditions
Min. Typ. Max. Units
VOUT/VIN
VOUT/VOUT
eN
PSRR
Line regulation
Load regulation
Output noise
Power Supply Rejection
VIN = (VOUT + 1) to 6.5V
IOUT = 0.1 to 100mA
10Hz–1KHz
COUT = 10µF,
CBYP = 0.01µF
>10KHz,
COUT = 10µF,
CBYP = 0.01µF
120 Hz,
COUT = 10µF,
CBYP = 0.01µF
0.3 % / V
1.0 2.0 %
<7
<0.01
µV/ Hz
43 dB
Notes:
1. Unless otherwise stated, TA = 25°C, VIN = VOUT + 1V, IOUT = 100µA, VIH > 2.0 V.
2. Bold values indicate -40 TJ 125°C.
3. The adjustable version, has a bandgap voltage range of 1.24V to 1.40V with a nominal value of 1.32V.
4. When using repeated cycling.
6 REV. 1.0.6 2/14/03

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