www.fairchildsemi.com
FAN2510, FAN2511
100 mA CMOS LDO Regulators with Fast Start Enable
wide variety of external capacitors, and the compact SOT23-5
surface-mount package. In addition, the FAN2510/11 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
Features
• Ultra Low Power Consumption
• Enable optimized for CDMA time slices
• 100 mV dropout voltage at 100 mA
• 25 µA ground current at 100 mA
• Enable/Shutdown Control
against overload.
• SOT23-5 package
• Thermal limiting
• 300 mA peak current
The FAN2510 and FAN2511 devices are distinguished by
the assignment of pin 4:
FAN2510: pin 4 – ADJ, allowing the user to adjust the
output voltage over a wide range using an external voltage
divider.
Applications
• Cellular Phones and accessories
• PDAs
• Portable cameras and video recorders
FAN2510-XX: pin 4 – BYP, to which a bypass capacitor
• Laptop, notebook and palmtop computers
may be connected for optimal noise performance. Output
voltage is fixed, indicated by the suffix XX.
Description
The FAN2510/11 family of micropower low-dropout voltage
regulators utilize CMOS technology to offer a new level of
cost-effective performance in GSM, TDMA, and CDMA
FAN2511-XX: pin 4 – ERR, a flag which indicates that the
output voltage has dropped below the specified minimum
due to a fault condition.
cellular handsets, Laptop and Notebook portable computers,
The standard fixed output voltages available are 2.5V, 2.6V,
and other portable devices. Features include extremely low
2.7V, 2.8V, 2.85V, 3.0V, and 3.3V. Custom output voltage are
power consumption and low shutdown current, low dropout
also available: please contact your local Fairchild Sales
voltage, exceptional loop stability able to accommodate a
Office for information.
Block Diagrams
EN
EN
V
IN
V
IN
BYP
Bandgap
Bandgap
p
p
Error
Error
Amplifier
Amplifier
V
ADJ
OUT
V
OUT
Thermal
Sense
Thermal
Sense
GND
GND
FAN2510
FAN25100-XX
EN
V
IN
ERR
Bandgap
p
Error
Amplifier
V
OUT
Thermal
Sense
GND
FAN2511-XX
REV. 1.0.4 2/5/02