MAX14523B Maxim, MAX14523B Datasheet

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MAX14523B

Manufacturer Part Number
MAX14523B
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
Manufacturer
Maxim
Datasheet

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Part Number:
MAX14523BATA+T
Quantity:
2 500
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.
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.
19-4814; Rev 1; 1/11
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.
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.
MAX14523AATA+
MAX14523ALATA+**
MAX14523BATA+
MAX14523BATA/V+T
MAX14523CATA+
SDIO Ports
USB Ports
Notebook VGA Ports
GPS
Cell Phones
MP3 Players
UTCA/ATCA Platforms
PART
________________________________________________________________ Maxim Integrated Products
General Description
PIN-PACKAGE
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
8 TDFN-EP*
Applications
TOP MARK
250mA to 1.5A, Adjustable
BLO
BLQ
BLQ
BLP
BLS
Ordering Information/Selector Guide
Current-Limit Switches
♦ 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
*ON FOR THE MAX14523AL ONLY.
SUPPLY
POWER
μP
10kΩ
ON POLARTIY
V
Active-High
Active-High
Active-High
Active-High
PULLUP
Active-Low
R
1μF
SETI
Typical Operating Circuit
IN
FLAG
ON(ON)*
REFERENCE
CURRENT
OVERCURRENT RESPONSE
GND
MAX14523AL
MAX14523A
MAX14523B
MAX14523C
Continuous
CONTROL
VOLTAGE
CHARGE
PUMP
LOGIC
BIAS
Latch-Off
Latch-Off
Autoretry
Autoretry
Features
OUT
N.C.
1μF
LOAD
1

Related parts for MAX14523B

MAX14523B Summary of contents

Page 1

... 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 ...

Page 2

... T = -40°C to +125°C, unless otherwise noted. Typical values IN OUT A J CONDITIONS 0A, switch on 3.3V Q OUT 3.3V after an overcurrent IN OUT LATCH fault (MAX14523B 0V 5.5V, V SHDN 0V 1.7V 5.5V (current into OUT 3.3V, I lower than I ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +1.7V to +5.5V 94.2kΩ SETI are +3.3V +25°C.) (Note PARAMETER SYMBOL OUTPUT Output Logic-Low Voltage Output Leakage Current DYNAMIC Turn-On Time Turn-Off Time ...

Page 4

Adjustable Current-Limit Switches t BLANK OUT CURRENT LIMIT LOAD CURRENT FLAG Figure 2. Autoretry Fault Diagram OUT CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE FLAG Figure 3. Latchoff Fault Diagram 4 _______________________________________________________________________________________ t t ...

Page 5

C = 1µ 1µ OUT CURRENT LIMIT vs. SUPPLY VOLTAGE 1.60 1.55 1.50 1.45 1.40 1.70 2.65 3.60 4.55 SUPPLY VOLTAGE (V) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE 300 250 V = +5V ...

Page 6

... SUPPLY TEMPERATURE 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 - TEMPERATURE (°C) 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = 94.2kΩ +25°C, unless otherwise noted.) SETI A LATCHOFF CURRENT vs. TEMPERATURE 30 MAX14523B +5. +3. 125 - TEMPERATURE (°C) SWITCH TURN-ON TIME vs. SUPPLY TEMPERATURE 1 20Ω LOAD 1 +5. ...

Page 7

... C = 1µ 1µ OUT CURRENT LIMIT RESPONSE MAX14523A toc13 SUDDEN SHORT APPLIED AT OUTPUT V OUT 2V/div I OUT 10A/div 2μs/div PIN MAX14523A NAME MAX14523B MAX14523AL MAX14523C N. SETI 4 4 OUT GND — — ...

Page 8

... Current Limit/Threshold section). If the output current is limited at the current threshold value for a time equal to or longer than t , the output flag asserts and the BLANK MAX14523A/MAX14523AL enter the autoretry mode, the MAX14523B latches off the switch, and the MAX14523C enters the continuous current-limit mode. 8 _______________________________________________________________________________________ THERMAL SHUTDOWN ...

Page 9

... The ON input for the MAX14523A/MAX14523B/ BLANK MAX14523C and ON input for the MAX14523AL control , when the switch the switch, see Table 1. Toggle ON for the MAX14523B to reset the fault condition once the short-circuit current is detected and the device shuts down. The MAX14523A/MAX14523AL/MAX14523B/MAX14523C feature a reverse-current protection circuit that limits ...

Page 10

... MAX ( ) OUT MAX ( ) BLANK = ) + t t RETRY BLA Chip Information Pin Configuration N. GND FLAG 2 7 ON(ON)** MAX14523A MAX14523AL MAX14523B SETI 3 6 N.C. MAX14523C *EP OUT TDFN 3mm x 3mm Package Information PACKAGE OUTLINE LAND CODE NO. PATTERN NO. T833+2 21-0137 90-0059 ...

Page 11

... Added the MAX14523BATA automotive-grade part to the Ordering Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...

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