LD49300 Datasheet, PDF (1/20 Pages) STMicroelectronics – 3A Very low drop for low output voltage regulator

LD49300
3A Very low drop for low output voltage regulator
Feature summary
■ Input voltage range:
V_I = 1.4V to 5.5V
V_BIAS = 3V to 6V
■ Stable with ceramic capacitor
■ ±1.5% initial tolerance
■ Maximum dropout voltage (V_I - V_O) of 400mV
over temperature
■ Adjustable output voltage down to 0.8V
■ Ultra fast transient response (up to 10MHz
bandwidth)
■ Excellent line and load regulation
specifications
■ Logic controlled shutdown option
■ Thermal shutdown and current limit protection
■ Junction temperature range: –25°C to 125°C
Description
The LD49300 is a high-bandwidth, low-dropout,
3.0A voltage regulator, ideal for powering core
voltages of low-power microprocessors. The
LD49300 implements a dual supply configuration
allowing for very low output impedance and very
fast transient response. The LD49300 requires a
bias input supply and a main input supply,
allowing for ultra-low input voltages on the main
supply rail. The input supply operates from 1.4V to
PPAK
5.5V and the bias supply requires between 3V
and 6V for proper operation. The LD49300 offers
fixed output voltages from 0.8V to 1.8V and
adjustable output voltages down to 0.8V.
The LD49300 requires a minimum output
capacitance for stability, and work optimally with
small ceramic capacitors.
Applications
■ Graphics processors
■ PC Add-In Cards
■ Microprocessor core voltage supply
■ Low voltage digital ICs
■ High Efficiency Linear power supplies
■ SMPS post regulators
Order code
Part number
LD49300PT08R ⁽¹⁾
LD49300PT10R
LD49300PT12R
1. Adjustable Version.
December 2006
Package
PPAK (Tape&Reel)
PPAK (Tape&Reel)
PPAK (Tape&Reel)
Rev. 2
Packaging
2500 parts per reel
2500 parts per reel
2500 parts per reel
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