_______________General Description

The MAX710/MAX711 integrate a step-up DC-DC con-

verter with a linear regulator to provide step-up/down

voltage conversion. They are optimized for battery

applications where the input varies above and below

the regulated output voltage. They have an input range

from +1.8V to +11V. Typical efficiency when boosting

battery inputs is 85%.

The MAX710/MAX711 can be configured for minimum

noise or optimum efficiency. Shutdown control turns off

the part completely, disconnecting the input from the

the step-up converter and leaves the low-power linear

The MAX710 has a preset 3.3V or 5V output voltage.

The MAX711 has an adjustable output that can be set

from +2.7V to +5.5V with two resistors. Both devices

come in 16-pin narrow SO packages.

________________________Applications

Single-Cell, Lithium-Powered Portable Devices

Digital Cameras

2- to 4-Cell AA Alkaline Hand-Held Equipment

3.3V and Other Low-Voltage Systems

2-, 3-, and 4-Cell Battery-Powered Equipment

Battery-Powered Devices with AC Input Adapters

____________________________Features

o Step-Up/Down Voltage Conversion

o +1.8V to +11V Input Range

o Output:

o No External FETs Required

o Load Disconnected from Input in Shutdown

o Battery Drain:

7µA in Standby

0.2µA when Off

o Low-Noise and High-Efficiency Modes

3.3V/5V or Adjustable,

Step-Up/Down DC-DC Converters

________________________________________________________________

Maxim Integrated Products

1

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

LX

LX

PGND

GND

REF

PS

LBI+

LBI-

OUT

TOP VIEW

MAX710

MAX711

SO

PGND

ILIM

3/5 (FB)

SHDN

STBY

N/E

LBO

( ) IS FOR THE MAX711.

__________________Pin Configuration

MAX710

LBI+

LBO

N/E

SHDN

OFF

ON

STBY

3/5

LBI-

REF

PGND

C3

0.1

µF

GND

ILIM

LX

PS

C4

C1

C2

L1

OUTPUT

3.3V/5V

+1.8V TO +11V

INPUT

OUT

5V

3.3V

ON

STBY

__________Typical Operating Circuit

19-1254; Rev 0; 7/97

PART

MAX710C/D

MAX710ESE

MAX711C/D

0°C to +70°C

-40°C to +85°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

Dice

16 Narrow SO

Dice

EVALUATION

KIT MANUAL

FOLLOWS

DATA

SHEET

______________Ordering Information

MAX711ESE

-40°C to +85°C

16 Narrow SO

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.