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Fairchild Semiconductor Electronic Components Datasheet

FAN2513 Datasheet

150 mA CMOS LDO Regulators with Fast Start Enable

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FAN2513 pdf
www.fairchildsemi.com
FAN2512, FAN2513
150 mA CMOS LDO Regulators with Fast Start Enable
Features
• Ultra Low Power Consumption
• Enable optimized for CDMA time phases
• 150 mV dropout voltage at 150 mA
• 25 µA ground current at 150 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 FAN2512/13 family of micropower low-dropout voltage
regulators utilize CMOS technology to offer a new level of
cost-effective performance in GSM, TDMA, and CDMA
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
FAN2512
Thermal
Sense
ADJ
GND
VIN
Bandgap
wide variety of external capacitors, and the compact SOT23-5
surface-mount package. In addition, the FAN2512/13 family
offer the fast power-cycle time required in CDMA handset
applications. These products offer significant improvements
over older BiCMOS designs and are pin-compatible with
many popular devices. The output is thermally protected
against overload.
The FAN2512 and FAN2513 devices are distinguished by
the assignment of pin 4:
FAN2512: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2512-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.
FAN2513-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
FAN2512-XX
EN
Error
Amplifier
p
Thermal
Sense
ERR
VOUT
GND
FAN2513-XX
Thermal
Sense
GND
REV. 1.1.7 2/14/03


Fairchild Semiconductor Electronic Components Datasheet

FAN2513 Datasheet

150 mA CMOS LDO Regulators with Fast Start Enable

No Preview Available !

FAN2513 pdf
PRODUCT SPECIFICATION
Pin Assignments
FAN2512/FAN2513
VIN 1
GND 2
EN 3
5 VOUT
4 ADJ/BYP/ERR
Pin No.
1.
2.
3.
4.
5.
FAN2512
VIN
GND
EN
ADJ
VOUT
FAN2512-XX
VIN
GND
EN
BYP
VOUT
FAN2513-XX
VIN
GND
EN
ERR
VOUT
Pin Descriptions
Pin Name Pin No. Type
ADJ 4 Input
BYP
ERR
4 Passive
4 Open drain
EN 3 Digital Input
VIN
VOUT
GND
1 Power in
5 Power out
2 Power
Pin Function Description
FAN2512 Adjust. Ratio of potential divider from VOUT to ADJ
determines output voltage.
FAN2512-XX Bypass. Connect 470 pF capacitor for noise reduction.
FAN2513-XX Error. Error flag output.
0: Output voltage < 95% of nominal.
1: Output voltage > 95% of nominal.
Enable.
0: Shutdown VOUT.
1: Enable VOUT.
Voltage Input. Supply voltage input.
Voltage Output. Regulated output voltage.
Ground.
Functional Description
Designed utilizing CMOS process technology, the
FAN2512/13 family of products are carefully optimized for
use in compact battery-powered devices, offering a unique
combination of low power consumption, extremely low
dropout voltages, high tolerance for a variety of output
capacitors, and the ability to disable the output to less than
1µA under user control. In the circuit, a difference amplifier
controls the current through a series-pass P-Channel
MOSFET, comparing the load voltage at the output with an
onboard low-drift bandgap reference. The series resistance
of the pass P-Channel MOSFET is approximately 1, result-
ing in an unusually low dropout voltage under load when
compared to older bipolar pass-transistor designs.
Protection circuitry is provided onboard for overload condi-
tions. In conditions where the device reaches temperatures
exceeding the specified maximums, an onboard circuit shuts
down the output, where it remains suspended until it has
cooled before re-enabling. The user is also free to shut down
the device using the Enable control pin at any time.
Careful design of the output regulator amplifier assures loop
stability over a wide range of ESR values in the external
output capacitor. A wide range of values and types can be
accommodated, allowing the user to select a capacitor
meeting his space, cost, and performance requirements,
and enjoy reliable operation over temperature, load, and
tolerance variations.
2 REV. 1.1.7 2/14/03


Part Number FAN2513
Description 150 mA CMOS LDO Regulators with Fast Start Enable
Maker Fairchild Semiconductor
Total Page 10 Pages
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