General Description

The MAX15009 includes a 300mA LDO regulator, a

switched output, and an overvoltage protection (OVP)

controller to protect downstream circuits from high-volt-

age load dump. The MAX15011 includes only the 300mA

LDO regulator and switched output. Both devices operate

over a wide supply voltage range from 5V to 40V and are

able to withstand load-dump transients up to 45V. The

MAX15009/MAX15011 feature short-circuit and thermal-

shutdown protection. These devices offer highly integrat-

ed power management solutions for automotive

applications such as instrument clusters, climate control,

and a variety of automotive power-supply circuits.

The 300mA LDO regulator consumes 70µA quiescent

current at light loads and is well suited to power always-

on circuits during “key off” conditions. The LDO features

independent enable and hold inputs, as well as a micro-

processor (µP) reset output with adjustable reset timeout

period.

The switched output of the MAX15009/MAX15011

switch internally connected to the output of the LDO

regulator. This switch features accurate current-limit

sensing circuitry and is capable of controlling remote

loads. The MAX15009/MAX15011 feature an adjustable

current limit and a programmable delay timer to set the

overcurrent detection blanking time of the switch and

autoretry timeout.

The MAX15009 OVP controller operates with an external

enhancement mode n-channel MOSFET. While the moni-

tored voltage remains below the adjustable threshold, the

MOSFET stays on. When the monitored voltage exceeds

the OVP threshold, the OVP controller quickly turns off the

external MOSFET. The OVP controller is configurable as a

load-disconnect switch or a voltage limiter.

The MAX15009/MAX15011 are available in a thermally

enhanced, 32-pin (5mm x 5mm), TQFN package and are

fully specified over the -40°C to +125°C automotive oper-

ating temperature range.

Applications

Instrument Clusters

Climate Control

AM/FM Radio Power Supply

Multimedia Power Supply

Telematics Power Supply

Features

♦ 300mA LDO Regulator, Switched Output, and OVP

Controller (MAX15009)

♦ 300mA LDO Regulator and Switched Output

(MAX15011)

♦ 5V to 40V Wide Operating Supply Voltage Range

♦ 45V Load Dump Protection

♦ 70µA Quiescent Current LDO Regulator

♦ OVP Controller Disconnects or Limits Output

Voltage During Battery Overvoltage Conditions

♦ LDO Regulator with Enable, Hold, and Reset

Features

♦ Internal 0.28Ω (typ) n-Channel Switch for

Switched Output

♦ 100mA Switched Output with Adjustable Current-

Limit Blanking/Autoretry Delay

Automotive 300mA LDO Regulators with

Switched Output and Overvoltage Protector

________________________________________________________________

Maxim Integrated Products

1

MAX15009

TQFN

(5mm x 5mm)

+

TOP VIEW

29

30

28

27

12

11

13

14

12

OUT_SW

45

6

7

23

24

22

20

19

18

N.C.

N.C.

N.C.

SOURCE

GATE

N.C.

3

21

31

10

N.C.

FB_PROT

32

9

N.C.

CT

OUT_SW

26

15

FB_LDO

*EP

*EP = EXPOSED PAD

N.C.

25

16

EN_LDO

8

17

HOLD

Pin Configurations

19-0923; Rev 0; 8/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

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

Typical Operating Circuits and Selector Guide appear at end

of data sheet.

Pin Configurations continued at end of data sheet.

Ordering Information

+

Denotes a lead-free package.

For tape and reel, add a T after “+.”

*

Future product—contact factory for availability.

**

EP = Exposed pad.

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX15009ATJ+

-40°C to +125°C

32 TQFN-EP** T3255-4

MAX15011ATJ+*

-40°C to +125°C

32 TQFN-EP** T3255-4