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General Description

The MAX15008 features a 300mA LDO regulator, a volt-

age tracker, and an overvoltage protection (OVP) con-

troller to protect downstream circuits from high-voltage

load dump. The MAX15010 includes only the 300mA

LDO voltage regulator and voltage tracker. Both devices

operate over a wide 5V to 40V supply voltage range and

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

MAX15008/MAX15010 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 less than 67µA qui-

escent 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

microprocessor (µP) reset output with an adjustable reset

timeout period.

The voltage tracker accurately (±3mV) tracks a voltage

applied to its input from either the LDO output or an exter-

nal source. It can supply up to 50mA of current to a

remote sensor, allowing for precise ratiometric tracking in

automotive applications. A separate enable input turns

the tracker on or off, reducing supply current when the

tracker is unused. The voltage tracker also features pro-

tection against battery reversal, an output short circuit to

the battery, or an output-voltage excursion below ground

potential to as much as -5V.

The MAX15008 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 MAX15008/MAX15010 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

o 300mA LDO Regulator, Voltage Tracker, and OVP

Controller (MAX15008)

o 300mA LDO Regulator and Voltage Tracker

(MAX15010)

o 50mA Voltage Tracker with ±3mV Tracking Accuracy

o 5V to 40V Wide Operating Supply Voltage Range

o 45V Load Dump Protection

o 67µA Quiescent Current LDO Regulator

o OVP Controller Disconnects or Limits Output from

Battery Overvoltage Conditions (MAX15008)

o LDO Regulator with Enable, Hold, and Reset

Features

MAX15008/MAX15010

Automotive 300mA LDO Voltage Regulators

with Tracker Output and Overvoltage Protector

________________________________________________________________

Maxim Integrated Products

MAX15008

TQFN

(5mm x 5mm)

TOP VIEW

N.C.

ADJ

SGND

PGND

RESET

N.C.

OUT_LDO

N.C.

EN_PROT

N.C.

4567

2324 22 20 19 18

FB_TRK

TRACK

REF

SOURCE

GATE

N.C.

OUT_TRK

OUT_LDO

N.C.

FB_PROT

N.C.

FB_LDO

*EP

*EP = EXPOSED PAD

N.C.

EN_LDO

N.C.

EN_TRK

HOLD

Pin Configurations

19-0996; Rev 1; 2/08

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 appear at end of data sheet.

Pin Configurations continued at end of data sheet.

Ordering Information

Denotes a lead-free package.

EP = Exposed pad.

PART LDO

TRACKER

OVP

CONTROLLER

MAX15008 √√ √

MAX15010 √√ —

Selector Guide

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX15008ATJ+

-40°C to +125°C 32 TQFN-EP*

T3255-4

MAX15010ATJ+

-40°C to +125°C 32 TQFN-EP*

T3255-4

1 2 3 4 5 6 ... 23 24

MAX15008/MAX15010 1

Resumo do Conteúdo

Página 1 - MAX15008/MAX15010

General DescriptionThe MAX15008 features a 300mA LDO regulator, a volt-age tracker, and an overvoltage protection (OVP) con-troller to protect downstr

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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Detailed DescriptionThe MAX15008/MAX15010 integrate a 300mA LDOvoltage regulator, a voltage tracker, and an OVP con-troller. These devices operate ove

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Applications InformationLoad DumpMost automotive applications run off a multicell 12Vlead-acid battery with a nominal voltage that swingsbetween 9V an

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MAX15008/MAX15010Setting the RESETTimeout PeriodThe reset timeout period is adjustable to accommodatea variety of applications. Set the reset timeout

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Setting the Overvoltage Threshold(MAX15008 Only)The MAX15008 provides an accurate means to set theovervoltage threshold for the OVP controller usingFB

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MAX15008/MAX15010External MOSFET SelectionSelect the external MOSFET with adequate voltagerating, VDSS, to withstand the maximum expected load-dump in

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Calculate the discharge time, t1, using the followingequation:where t1is in ms, VOVis the adjusted overvoltagethreshold in volts, ILOADis the external

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage ProtectorMaxim cannot assume responsibility for use of any

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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MAX15008/MAX15010Automotive 300mA LDO Voltage Regulatorswith Tracker Output and Overvoltage Protector_________________________________________________

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Rainbow-electronics MAX15010 Manual do Utilizador

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