L6935 Datasheet, PDF (1/20 Pages) STMicroelectronics – High performance 3 A ULDO linear regulator

L6935
High performance 3 A ULDO linear regulator
Features
■ Up to 5 V input voltage range
■ 60 mΩ max R_DS(on)
■ 35 µA shut-down current
■ 3 A maximum output current
■ Split bias and power supplies
■ Adjustable output voltage: 0.5 V to 3.0 V
■ Excellent load and line regulation: 1 %
accuracy (over temperature)
■ MLCC supported
■ Programmable soft-start
■ Short-circuit protection
■ 3.5 A overcurrent protection
■ Thermal shut-down
■ VFQFPN20 4 x 4 x 1.0 mm package
Applications
■ Motherboard
■ Mobile PC
■ Hand-held instruments
■ PCMCIA cards
■ Processors I/O
■ Chipset and RAM supply
Table 1. Device summary
Order codes
VFQFPN20
(4.0 x 4.0 x 1.0 mm)
Description
L6935 is an ultra low drop output linear regulator
operating up to 5 V input and is able to support
output current up to 3 A. Designed with an
internal low-R_DS(on) N-channel MOSFET, it can
be used for on-board DC-DC conversions saving
in real estate, list of components and power
dissipation.
Bias input and power input are split to allow linear
conversion from buses lower than 1.2 V
minimizing power losses.
L6935 provides the application with an adjustable
voltage from 0.5 V to 3.0 V with a voltage
regulation accuracy of 1 %. soft-start is available
to program the output voltage rise-time according
to the external capacitor connected.
Enable and Power Good functions make L6935
suitable for complex systems and programmable
start-up sequencing.
The current limit at 3 A protects the system during
a short circuit. The current is sensed in the power
DMOS in order to limit the power dissipation.
Thermal shut down limits the internal temperature
at 150 °C with a hysteresis of 20 °C.
Package
Packing
L6935
L6935TR
VFQFPN20
Tube
Tape and reel
May 2008
Rev 1
1/20
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