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FAN2509x27 Datasheet

Download or read online Fairchild Semiconductor FAN2509x27 50 mA CMOS LDO Regulators pdf datasheet.
Also see for FAN2509x27: Datasheet #2 (10 pages)



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FAN2508, FAN2509
50 mA CMOS LDO Regulators
Features
• Ultra Low Power Consumption
• 50 mV dropout voltage at 50 mA
• 25 µA ground current at 50 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 FAN2508/09 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
EN
V IN
Bandgap
Error
Amplifier
Thermal
Sense
FAN2508
wide variety of external capacitors, and the compact SOT23-5
surface-mount package. The FAN2508/09 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 FAN2508 and FAN2509 devices are distinguished by
the assignment of pin 4:
FAN2508: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2508-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.
FAN2509-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.
V IN
Bandgap
p
V OUT
ADJ
GND
FAN2508-XX
EN
V IN
Bandgap
p
Error
Amplifier
Thermal
Sense
FAN2509-XX
www.fairchildsemi.com
EN
BYP
p
Error
Amplifier
V OUT
Thermal
Sense
GND
ERR
V OUT
GND
REV. 1.0.4 2/4/02

Summary of Contents

Page 1

FAN2508, FAN2509 50 mA CMOS LDO Regulators Features Ultra Low Power Consumption • dropout voltage 25 µA ground current Enable/Shutdown Control SOT23-5 package Thermal limiting 300 ...

Page 2

PRODUCT SPECIFICATION Pin Assignments Pin No. FAN2508 Pin Descriptions Pin Name Pin No. Type ADJ 4 Input BYP 4 Passive ERR 4 Open drain EN 3 Digital Input V 1 Power ...

Page 3

FAN2508/FAN2509 Depending on the model selected, a number of control and status functions are available to enhance the operation of the LDO regulator. An Enable pin, available on all devices, allows the user to shut down the regulator output to ...

Page 4

PRODUCT SPECIFICATION Thermal Characteristics The FAN2508/09 is designed to supply 50mA at the specified output voltage with an operating die (junction) temperature 125°C. Once the power dissipation and thermal resistance is known, the maximum junction temperature of ...

Page 5

FAN2508/FAN2509 Absolute Maximum Ratings Parameter Power Supply Voltages V (Measured to GND) IN Enable Input (EN) Applied voltage (Measured to GND) ERR Output Applied voltage (Measured to GND) Power 3 Dissipation Temperature Junction Lead Soldering (5 seconds) Storage 4 Electrostatic ...

Page 6

PRODUCT SPECIFICATION Electrical Characteristics Symbol Parameter Regulator V Drop Out Voltage DO V Output Voltage Accuracy O V Reference Voltage Accuracy, Adjustable DO Mode 3 V Output Voltage Accuracy, Adjustable Mode O I Ground Pin Current GND Protection Current Limit ...

Page 7

FAN2508/FAN2509 Typical Performance Characteristics Power Supply Rejection Ratio 100 I 100 A OUT C 1.0 F Cer. 80 OUT 4. 3.0V OUT 0 1k 10k 100k 1M 10M 10 100 ...

Page 8

PRODUCT SPECIFICATION Typical Performance Characteristics Ground Pin Current OUT I 100 125 -40 80 Temperature ( C) Dropout Characteristics 3.5 3 ...

Page 9

FAN2508/FAN2509 Mechanical Dimensions 5-Lead SOT-23-5 (S) Package Inches Millimeters Symbol Min. Max. Min. A .035 .057 .90 A1 .000 .006 .00 B .008 .20 .020 c .003 .010 .08 D .106 .122 2.70 E .059 .071 1.50 e .037 BSC ...

Page 10

... NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILDS 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 ...

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