FAN1540

FAN1539/FAN1540 1A/1.3A, LDO with Low Quiescent Current

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FAN1539/FAN1540 1A/1.3A, LDO with Low Quiescent Current

November 2005

FAN1539/FAN1540 1A/1.3A, LDO with Low Quiescent Current
Features
Very Low Ground Current (IGND 1mA) Excellent Line Regulation Excellent Load Regulation Very Low Transient Overshoot Stable with low ESR Output Capacitor (ESR 0m) Thermal Shutdown Current Limit Output Options: 3.3V and 1.8V

Description
The FAN1539/FAN1540 series of high current LDOs (1.0A and 1.3A) has been developed for portable applications where low quiescent current is an important requirement. The device features excellent line and load transient response which does not exceed 10% of nominal output value for full operating temperature range even during power ON cycle and short circuit removal. Internally trimmed, temperature compensated bandgap reference guarantees 2.5% accuracy for full range of input voltage, output current and temperature. Included on the chip are accurate current limit and thermal shutdown protection. Device stability is achieved with only two external low ESR ceramic capacitors. The FAN1539/FAN1540 is available in thermally enhanced 3x3mm 6-lead MLP, 5x6mm 8-lead MLP and 3-lead TO-252 packages. The 5x6mm MLP package version features a separate Kelvin sense pin for high precision applications.

Applications
Disk Drive Circuits Desktop Computers Laptop, Notebook Computers General Purpose Three Terminal Regulator

Ordering Information
Product Number
FAN1540MMPX FAN1539MPX FAN1540MPX FAN1540DX FAN1540D18X

Output Voltage
3.3V 3.3V 3.3V 3.3V 1.8V

Package
5x6mm 8-Lead MLP in T R 3x3mm 6-Lead MLP in T R 3x3mm 6-Lead MLP in T R 3-Lead TO-252 in T R 3-Lead TO-252 in T R

Tape and Reel Information
Quantity
3000

Reel Size
7"

Width
8mm

2005 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN1539/FAN1540 Rev. 1.1.1