FAN2501 Fairchild Semiconductor, FAN2501 Datasheet

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FAN2501

Manufacturer Part Number
FAN2501
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
Manufacturer
Fairchild Semiconductor
Datasheet

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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
FAN2500, FAN2501
100 mA CMOS LDO Regulators
V IN
FAN2500
Bandgap
Thermal
Sense
Error
Amplifier
EN
p
V IN
FAN2501-XX
GND
ADJ
Bandgap
V OUT
Thermal
Sense
Error
Amplifier
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.
EN
V IN
FAN2500-XX
Bandgap
p
GND
Thermal
Sense
ERR
Error
Amplifier
V OUT
EN
www.fairchildsemi.com
p
GND
BYP
V OUT
REV. 1.0.
/14/

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FAN2501 Summary of contents

Page 1

... 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. ...

Page 2

... BYP V OUT Pin Function Description FAN2500 Adjust. Ratio of potential divider from VOUT to ADJ determines output voltage. FAN2500-XX Bypass. Connect 470 pF capacitor for noise reduction. FAN2501-XX Error. Error flag output. 0: Output voltage < 95% of nominal. 1: Output voltage > 95% of nominal. Enable. 0: Shutdown V . OUT 1: Enable V ...

Page 3

... If this shutdown function is not needed, the pin can simply be connected to the V pin. Allowing this pin to IN float will cause erratic operation. Error Flag (FAN2501 only) To indicate conditions such as input voltage dropout (low V ), overheating, or overloading (excessive output cur- IN rent), the ERR pin indicates a fault condition open- ...

Page 4

... Component-side copper provides significantly better thermal performance for this surface-mount device, compared to that obtained when using only copper planes on the underside. FAN2500/FAN2501 , using an external resistor IN presented to the ADJ pin is fed to ADJ ...

Page 5

... FAN2500/FAN2501 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 Discharge Notes: 1. Functional operation under any of these conditions is NOT implied. Performance and reliability are guaranteed only if Operating Conditions are not exceeded ...

Page 6

... Logic Low Voltage IL V Logic High Voltage IH I Input Current High IH I Input Current Low I Switching Characteristics Parameter 4 Enable Input Response time Error Flag (FAN2501-XX) Response time Performance Characteristics Symbol Parameter Line regulation OUT Load regulation OUT OUT e Output noise ...

Page 7

... FAN2500/FAN2501 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 Frequency (Hz) Power Supply Rejection Ratio 100 3.0V OUT 100 A 20 OUT Cer. OUT 0 10 100 ...

Page 8

... Temperature ( C) Output Voltage vs. Temperature 3. 2.9 Typical 3V device I = 100 A L 2.85 - 125 Temperature ( C) Shutdown Delay Disable V OUT FAN2500/FAN2501 Dropout Voltage 100.00 80.00 60.00 40.00 20.00 0. 100 0.1 60 Output Current (mA) Dropout Voltage 125 100 100mA - 125 Temperature ( C) Time (20 s/div) REV ...

Page 9

... FAN2500/FAN2501 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 .95 BSC .075 BSC e1 1.90 BSC H .087 .126 2.20 .004 .024 . ...

Page 10

... Reel Size 7" 8mm 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 affect its safety or effectiveness. FAN2500/FAN2501 Package Marking ACA CE ACN ACW AC3 ADE /14 ...

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