Electrical Specifications Subject to Change

LT3070

1

3070p

APPLICATIONS

TYPICAL APPLICATION

DESCRIPTION

5A, Low Noise,

Programmable Output,

85mV Dropout

Linear Regulator

The LT

sponse linear regulator. The device supplies up to 5A of

output current with a typical dropout voltage of 85mV.

A 0.01μF reference bypass capacitor decreases output

permits the use of low ESR ceramic capacitors, saving

bulk capacitance and cost. The LT3070’s features make

it ideal for high performance FPGAs, microprocessors or

sensitive communication supply applications.

Output voltage is digitally selectable in 50mV increments

over a 0.8V to 1.8V range. A margining function allows the

user to tolerance system output voltage in increments of

±1%, ±3% or ±5%. The IC incorporates a unique tracking

function to control a buck regulator powering the LT3070’s

input. This tracking function drives the buck regulator to

minimizing power dissipation.

Internal protection includes UVLO, reverse-current protec-

tion, precision current limiting with power foldback and

thermal shutdown. The LT3070 regulator is available in a

thermally enhanced 28-lead, 4mm

× 5mm QFN package.

0.9V, 5A Regulator

FEATURES

(15μF Minimum)

Power Dissipation and Optimize Efficiency

× 5mm) QFN Package

Dropout Voltage

XXX

0

2

3

40

LTXXXX • TPCXX

1

0

10

20

PLACE HOLDER

30

4

BIAS

50k

LT3070

IN

EN

330μF

2.2μF

2.2μF

0.01μF

1nF

4.7μF

3070 TA01a

10μF

PWRGD

0.9V

5A

MARGSEL

MARGTOL

VIOC

SENSE

OUT

2.2V TO 3.6V

1.2V

PWRGD

REF/BYP

GND

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. UltraFast is a trade mark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.