MAX14571 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Adjustable Overvoltage and Overcurrent Protectors with High Accuracy

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MAX14571/MAX14572/MAX14573
Adjustable Overvoltage and Overcurrent
Protectors with High Accuracy
General Description
The MAX14571/MAX14572/MAX14573 adjustable over-
voltage and overcurrent-protection devices are ideal
to protect systems against positive and negative input
voltage faults up to Q40V and feature low 100mI (typ)
RON FETs.
The overvoltage-protector (OVP) feature protects voltages
between 6V and 36V, while the undervoltage-protector
(UVP) feature protects voltages between 4.5V and 24V.
The overvoltage-lockout (OVLO) and undervoltage-lockout
(UVLO) thresholds are set using optional external resistors.
The factory-preset internal OVLO threshold is 33V (typ)
and the preset internal UVLO threshold is 19.2V (typ).
The ICs also feature programmable current-limit protec-
tion up to 4.2A. Once current reaches the threshold, the
MAX14571 turns off after the 20.7ms (typ) blanking time
and stays off during the retry period. The MAX14572
latches off after the blanking time, and the MAX14573
limits the current continuously. In addition, these devices
feature reverse current and thermal-shutdown protec-
tion.
The ICs are available in a small 14-pin TSSOP (5mm x
6.5mm) package and are specified over the extended
-40NC to +85NC temperature range.
Applications
Industrial Equipment
Consumer Electronics
Marine Equipment
Battery-Powered Applications
Features
S Wide 4.5V to 36V Operating Input Range
S Adjustable OVLO and UVLO Thresholds
±3% Accurate Preset Thresholds
Automatic Internal and External Selection
S Programmable Forward Current Limit
Adjustable Current Limit Up to 4.2A
±15% Accuracy Limit
S 100mω (typ) On-Resistance FET
S Dual-Enable Inputs
High-Voltage-Capable Input HVEN
Microprocessor Input EN
S Reverse Current Flow Control Input RIEN
S Thermal-Shutdown Protection
Ordering Information
PART
TEMP PIN-
OVERCURRENT
RANGE PACKAGE PROTECTION
MAX14571EUD+T*
-40NC to
+85NC
14 TSSOP-
EP**
Autoretry
MAX14572EUD+T
-40NC to 14 TSSOP-
+85NC EP**
Latchoff
MAX14573EUD+T*
-40NC to
+85NC
14 TSSOP-
EP**
Continuous
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
T = Tape and reel.
**EP = Exposed pad.
Typical Operating Circuit
VPOWER
SYSTEM
INPUT
CIN
R3 R1
R4 R2
IN
OUT
IN
OUT
IN
OUT
MAX14571
MAX14572
MAX14573
UVLO
FLAG
OVLO
EN
SET1
RIEN
HVEN
GND
COUT
V_PULLUP
SYSTEM
NOTE: R1, R2, R3, AND R4 ARE ONLY REQUIRED FOR ADJUSTABLE
OVLO/UVLO; OTHERWISE, CONNECT UVLO/OVLO TO GND.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6470; Rev 0; 9/12