Document
www.fairchildsemi.com
FAN2514, FAN2515
200 mA CMOS LDO Regulators with Fast Start Enable
Features
• • • • • • • • Ultra Low Power Consumption Enable optimized for CDMA time phases 200 mV dropout voltage at 200 mA 75 µA ground current at 200 mA Enable/Shutdown Control SOT23-5 package Thermal limiting 300 mA peak current wide variety of external capacitors, and the compact SOT23-5 surface-mount package. In addition, the FAN2514/15 family offer the fast power-cycle time required in CDMA handset applications. The products offer significant improvements over older BiCMOS designs and are pin-compatible with many popular devices. The output is thermally protected against overload. The FAN2514 and FAN2515 devices are distinguished by the assignment of pin 4: FAN2514: pin 4 – ADJ, allowing the user to adjust the output voltage over a wide range using an external voltage divider. FAN2514-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. FAN2515-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.
Applications
• • • • Cellular Phones and accessories PDAs Portable cameras and video recorders Laptop, notebook and palmtop computers
Description
The FAN2514/15 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
EN VIN Bandgap Error Amplifier p VOUT ADJ Thermal Sense FAN2514 GND VIN Bandgap p VOUT Thermal Sense FAN2514-XX ERR Error Amplifier VIN Bandgap p VOUT EN BYP Error Amplifier
EN
GND
Thermal Sense FAN2515-XX
GND
REV. 1.0.8 2/14/03
PRODUCT SPECIFICATION
FAN2514/FAN2515
Pin Assignments
VIN GND EN
1 5
VOUT
2
3
4
ADJ/BYP/ERR
Pin No. 1. 2. 3. 4. 5.
FAN2514 VIN GND EN ADJ VOUT
FAN2514-XX VIN GND EN BYP VOUT
FAN2515-XX VIN GND EN ERR VOUT
Pin Descriptions
Pin Name ADJ BYP ERR Pin No. 4 4 4 Type Input Passive Open drain Pin Function Description FAN2514 Adjust. Ratio of potential divider from VOUT to ADJ determines output voltage. FAN2514-XX Bypass. Connect 470 pF capacitor for noise reduction. FAN2515-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.
EN
3
Digital Input
VIN VOUT GND
1 5 2
Power in Power out Power
Functional Description
Designed utilizing CMOS .