General Description

The MAX1793 low-dropout linear regulator (LDO) oper-

ates from +2.5V to +5.5V and delivers a guaranteed 1A

load current with a low 210mV dropout. The high-accu-

racy (±1%) output voltage is preset at an internally

trimmed voltage (see Ordering Information) or can be

adjusted from 1.25V to 5.0V with an external resistor-

divider.

An internal PMOS pass transistor allows a low 125µA

supply current, making the MAX1793 ideal for battery-

operated portable equipment. Other features include a

built-in reset output, low-power shutdown, and short-cir-

cuit and thermal overload protection. The MAX1793 is

available in a 1.5W, 16-pin power TSSOP package,

which is 30% smaller than a SOT223 package and only

1.1mm high.

________________________Applications

Notebook Computers

Cordless Telephones

Cellular Phones

Modems

Hand-Held Instruments

PDAs and Palmtop Computers

Features

o Guaranteed 1A Output Current

o Low 210mV Dropout at 1A

o Up to ±1% Output Voltage Accuracy

Preset at 1.5V, 1.8V, 2.0V, 2.5V, 3.3V or 5.0V

Adjustable from 1.25V to 5.0V

o Reset Output (4ms delay)

o Low 125µA Ground Current

o 0.1µA Shutdown

o Thermal Overload Protection

o Output Current Limit

o Tiny TSSOP Power Package (1.5W)

30% Smaller than SOT223 (only 1.1mm high)

________________________________________________________________ Maxim Integrated Products

1

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

N.C.

N.C.

OUT

OUT

OUT

OUT

SET

GND

N.C.

TOP VIEW

MAX1793

TSSOP-EP

IN

IN

RST

IN

IN

SHDN

N.C.

Pin Configuration

NC

MAX1793

IN

IN

IN

IN

IN

OFF

ON

SHDN

OUT

OUT

OUT

OUT

RST

SET

GND

OUT

RESET

OUTPUT

Typical Operating Circuit

19-1654; Rev 1; 11/00

Ordering Information

2.5 or Adj

MAX1793EUE-25 -40°C to +85°C 16 TSSOP-EP

†

5.0 or Adj

PART

MAX1793EUE-50 -40°C to +85°C

TEMP.

RANGE

PIN-

PACKAGE

*EP = Exposed Pad

† Contact factory for other preset output voltages.

16 TSSOP-EP*

3.3 or Adj

MAX1793EUE-33 -40°C to +85°C 16 TSSOP-EP*

2.0 or Adj

MAX1793EUE-20 -40°C to +85°C 16 TSSOP-EP

1.8 or Adj

MAX1793EUE-18 -40°C to +85°C 16 TSSOP-EP

1.5 or Adj

MAX1793EUE-15 -40°C to +85°C 16 TSSOP-EP

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.