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FAN2534S30X View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
View to exact match
FAN2534S30X
Fairchild
Fairchild Semiconductor Fairchild
FAN2534S30X Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
www.fairchildsemi.com
FAN2534/FAN2535
150 mA CMOS LDO Regulator with Fast Start, Enable
Features
• 70dB Ripple rejection ( >45dB up to 1MHz)
• 150µsec Power On Time
• 150µsec Enable Time
• Low noise - 50µVrms
• Enable optimized for CDMA time slices
• 180 mV dropout voltage at 150 mA
• Enable/Shutdown Control
• Enable time independent of noise bypass capacitor value
• SOT23-5 package
• Thermal limiting
• 300 mA trimmed current limit
Applications
• Cellular Phones and accessories
• PDAs
• Portable cameras and video recorders
• Laptop, notebook and palmtop computers
Description
The FAN2534/FAN2535 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 computers,
and other portable devices. Proprietary design technics
ensure high ripple rejection. Other features include low
noise, short circuit current limit, thermal shutdown circuit,
low dropout voltage, fast enable required in CDMA handset
applications, exceptional loop stability to accommodate a
wide variety of external capacitors, and a compact SOT23-5
surface-mount package. These products offer significant
improvements over older Bipolar and CMOS designs and are
pin-compatible with many popular devices.
The FAN2534 and FAN2535 devices are distinguished by
the assignment of pin 4:
FAN2534: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
FAN2534-XX: pin 4 – BYP, to which a bypass capacitor
may be connected for optimal noise performance. Output
voltage is fixed, as specified by the suffix XX.
FAN2535-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 2.6V, 2.85V,
and 3.0V . Custom output voltages are also available: please
contact your local Fairchild Sales Office for information.
Block Diagrams
VIN
Bandgap
FAN2534
EN
Error
p
Amplifier
VOUT
Thermal
Sense
ADJ
GND
VIN
Bandgap
EN
Error
p
Amplifier
Thermal
Sense
FAN2534-XX
BYP
VIN
Bandgap
VOUT
EN
Error
p
Amplifier
ERR
VOUT
GND
Thermal
Sense
FAN2535-XX
GND
REV. 1.0.2 8/26/03
 

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