General Description

Maxim’s MAX630 and MAX4193 CMOS DC-DC regula-

tors are designed for simple, efficient, minimum-size

DC-DC converter circuits in the 5mW to 5W range. The

MAX630 and MAX4193 provide all control and power

handling functions in a compact 8-pin package: a

1.31V bandgap reference, an oscillator, a voltage com-

parator, and a 375mA N-channel output MOSFET. A

comparator is also provided for low-battery detection.

Operating current is only 70µA and is nearly indepen-

dent of output switch current or duty cycle. A logic-level

input shuts down the regulator to less than 1µA quies-

cent current. Low-current operation ensures high effi-

ciency even in low-power battery-operated systems.

The MAX630 and MAX4193 are compatible with most

battery voltages, operating from 2.0V to 16.5V.

The devices are pin compatible with the Raytheon bipo-

lar circuits, RC4191/2/3, while providing significantly

improved efficiency and low-voltage operation. Maxim

also manufactures the MAX631, MAX632, and MAX633

DC-DC converters, which reduce the external compo-

nent count in fixed-output 5V, 12V, and 15V circuits.

See Table 2 at the end of this data sheet for a summary

of other Maxim DC-DC converters.

Applications

+5V to +15V DC-DC Converters

High-Efficiency Battery-Powered DC-DC

Converters

+3V to +5V DC-DC Converters

9V Battery Life Extension

Uninterruptible 5V Power Supplies

5mW to 5W Switch-Mode Power Supplies

Features

♦ High Efficiency—85% (typ)

♦ 70µA Typical Operating Current

♦ 1µA Maximum Quiescent Current

♦ 2.0V to 16.5V Operation

♦ 525mA (Peak) Onboard Drive Capability

♦ ±1.5% Output Voltage Accuracy (MAX630)

♦ Low-Battery Detector

♦ Compact 8-Pin Mini-DIP and SO Packages

♦ Pin Compatible with RC4191/2/3

CMOS Micropower Step-Up

Switching Regulator

________________________________________________________________ Maxim Integrated Products

1

GND

1

2

8

7

LBD

LBR

TOP VIEW

3

4

6

5

MAX630

MAX4193

Pin Configuration

Ordering Information

MAX630

+5V IN

470

μH

+15V

OUT

47pF

8

LBD

1

LBR

2

4

GND

7

3

6

5

+5 TO +15V CONVERTER

PART

TEMP RANGE

PIN-

PACKAGE

MAX630CPA

0

°C to +70°C

8 PDIP

MAX630CSA

0

°C to +70°C

8 SO

MAX630CJA

0

°C to +70°C

8 CERDIP

MAX630EPA

-40

°C to +85°C

8 PDIP

MAX630ESA

-40

°C to +85°C

8 SO

MAX630EJA

-40

°C to +85°C

8 CERDIP

MAX630MJA

-55

°C to +125°C

8 CERDIP**

MAX630MSA/PR

-55

°C to +125°C

8 SO†

MAX630MSA/PR-T

-55

°C to +125°C

8 SO†

MAX4193C/D

0

°C to +70°C

Dice*

MAX4193CPA

0

°C to +70°C

8 PDIP

MAX4193CSA

0

°C to +70°C

8 SO

MAX4193CJA

0

°C to +70°C

8 CERDIP

MAX4193EPA

-40

°C to +85°C

8 PDIP

MAX4193ESA

-40

°C to +85°C

8 SO

MAX4193EJA

-40

°C to +85°C

8 CERDIP

MAX4193MJA

-55

°C to +125°C

8 CERDIP**

Typical Operating Circuit

19-0915; Rev 2; 9/08

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

specifications.

**Contact factory for availability and processing to MIL-STD-883.

†Contact factory for availibility.