LD49300XX08 Datasheet, PDF (1/20 Pages) STMicroelectronics – 3 A very low drop-out voltage regulator

LD49300XX08
LD49300XX10, LD49300XX12
3 A very low drop-out voltage regulator
Features
■ Input voltage range:
– V_I = 1.4 V to 5.5 V
– V_BIAS = 3 V to 6 V
■ Stable with ceramic capacitor
■ ±1.5 % initial tolerance
■ Maximum dropout voltage (V_I - V_O) of 400 mV
over temperature
■ Adjustable output voltage down to 0.8 V
■ Ultra fast transient response (up to 10 MHz
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
Applications
■ Graphics processors
■ PC add-in cards
■ Microprocessor core voltage supply
■ Low voltage digital ICs
■ High efficiency linear power supplies
■ SMPS post regulators
PPAK
Description
The LD49300xx is a high-bandwidth, low drop-
out, 3.0 A voltage regulator, ideal for powering
core voltages of low-power microprocessors. The
LD49300xx implements a dual supply
configuration allowing for very low output
impedance and very fast transient response. The
LD49300xx 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 1.4 V to 5.5 V and the bias supply
requires between 3 V and 6 V for proper
operation. The LD49300xx offers fixed output
voltages from 0.8 V to 1.8 V and adjustable output
voltages down to 0.8 V. The LD49300xx requires a
minimum output capacitance for stability, and
works optimally with small ceramic capacitors.
Table 1. Device summary
Order codes
LD49300PT08R ⁽¹⁾
LD49300PT10R
LD49300PT12R
1. Adjustable version.
June 2010
Package
PPAK (Tape and reel)
PPAK (Tape and reel)
PPAK (Tape and reel)
Doc ID 12861 Rev 3
Packaging
2500 parts per reel
2500 parts per reel
2500 parts per reel
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