19-4814; Rev 1; 1/11
250mA to 1.5A, Adjustable
Current-Limit Switches
LB/MAX14523C
General Description
Features
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 70mΩ 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.
♦ Accurate (±±10% ꢀOerꢁlaꢂ ꢃurreꢄt ꢅLiLt
♦ Aꢂjustabꢁe ꢃurreꢄt-ꢅLiLt Threshlꢁꢂ
♦ ꢅlw-Drlplut Vlꢁtage (71iV at ±A ꢅlaꢂ ꢃurreꢄt%
♦ Shlrt-ꢃLrcuLt PrltectLlꢄ
♦ Theriaꢁ-Shutꢂlwꢄ PrltectLlꢄ
♦ ReOerse-ꢃurreꢄt PrltectLlꢄ
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.
♦ ±71µA (typ% Suppꢁy ꢃurreꢄt
♦ Shutꢂlwꢄ ReOerse ꢃurreꢄt, 1.6µA (iax%
♦ +±.7V tl +5.5V Suppꢁy Vlꢁtage Raꢄge
♦ TLꢄy 8-PLꢄ, 3ii x 3ii, TDFN Package
Typical Operating Circuit
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.
BIAS
VOLTAGE
IN
OUT
LOAD
POWER
SUPPLY
1μF
1μF
CHARGE
PUMP
Applications
SDIO Ports
R
SETI
CURRENT
REFERENCE
CONTROL
LOGIC
USB Ports
V
PULLUP
μP
Notebook VGA Ports
GPS
10kΩ
FLAG
N.C.
ON(ON)*
Cell Phones
MAX14523A
MAX14523AL
MAX14523B
MAX14523C
MP3 Players
UTCA/ATCA Platforms
GND
*ON FOR THE MAX14523AL ONLY.
PLꢄ ꢃlꢄfLguratLlꢄ appears at eꢄꢂ lf ꢂata sheet.
Ordering Information/Selector Guide
PART
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
TOP MARK
BLO
ON POLARTIY
Active-High
Active-Low
Active-High
Active-High
Active-High
OVERCURRENT RESPONSE
Autoretry
MAX14523AATA+
MAX14523ALATA+**
MAX14523BATA+
MAX14523BATA/V+T
MAX14523CATA+
BLP
Autoretry
BLQ
Latch-Off
BLQ
Latch-Off
BLS
Continuous
Nlte: 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.
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±
Flr prLcLꢄg, ꢂeꢁLOery, aꢄꢂ lrꢂerLꢄg LꢄflriatLlꢄ, pꢁease clꢄtact MaxLi DLrect at ±-888-629-4642,
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