General Description

The MAX14523A/MAX14523AL/MAX14523B/MAX14523C

programmable current-limit switches feature internal

current limiting to prevent damage to host devices due

to faulty load conditions. These current-limit switches

feature a low 70m

Ω on-resistance and operate from a

+1.7V to +5.5V input voltage range. The current limit is

adjustable from 250mA to 1.5A, making these devices

ideal for SDIO (secure digital input/output) and other

load-switching applications.

Each device in the family handles an overcurrent event

differently depending on the option selected. The

MAX14523A/MAX14523AL go into an autoretry mode,

the MAX14523B latches off the switch, and the

MAX14523C features a continuous current-limit mode.

Additional safety features include thermal shutdown to

prevent overheating and reverse-current blocking to

prevent current from being driven back into the source.

The MAX14523A/MAX14523AL/MAX14523B/MAX14523C

are available in a tiny 8-pin, 3mm x 3mm, TDFN pack-

age and operate over the -40°C to +125°C automotive

temperature range.

Applications

SDIO Ports

USB Ports

Notebook VGA Ports

GPS

Cell Phones

MP3 Players

UTCA/ATCA Platforms

Features

♦ Accurate (±10%) Overload Current Limit

♦ Adjustable Current-Limit Threshold

♦ Low-Dropout Voltage (70mV at 1A Load Current)

♦ Short-Circuit Protection

♦ Thermal-Shutdown Protection

♦ Reverse-Current Protection

♦ 170µA (typ) Supply Current

♦ Shutdown Reverse Current, 0.6µA (max)

♦ +1.7V to +5.5V Supply Voltage Range

♦ Tiny 8-Pin, 3mm x 3mm, TDFN Package

250mA to 1.5A, Adjustable

Current-Limit Switches

________________________________________________________________

Maxim Integrated Products

1

Ordering Information/Selector Guide

MAX14523A

MAX14523AL

MAX14523B

MAX14523C

1

μF

10k

Ω

BIAS

VOLTAGE

LOAD

CHARGE

PUMP

CONTROL

LOGIC

POWER

SUPPLY

μP

CURRENT

REFERENCE

GND

N.C.

1

μF

OUT

IN

FLAG

ON(ON)*

*ON FOR THE MAX14523AL ONLY.

Typical Operating Circuit

19-4814; Rev 1; 1/11

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.

PART

PIN-PACKAGE

TOP MARK

ON POLARTIY

OVERCURRENT RESPONSE

MAX14523AATA+

8 TDFN-EP*

BLO

Active-High

Autoretry

MAX14523ALATA+**

8 TDFN-EP*

BLP

Active-Low

Autoretry

MAX14523BATA+

8 TDFN-EP*

BLQ

Active-High

Latch-Off

MAX14523BATA/V+T

8 TDFN-EP*

BLQ

Active-High

Latch-Off

MAX14523CATA+

8 TDFN-EP*

BLS

Active-High

Continuous

Pin Configuration appears at end of data sheet.

Note: All devices are specified over the -40°C to +125°C operating temperature range.

+

Denotes a lead(Pb)-free package/RoHs-compliant package.

/V denotes an automotive qualified part.

*

EP = Exposed pad.

**

Future product—contact factory for availability.