Datasheet

Ideal Diode, Reverse-Battery, and Overvoltage Protection
Switch/Limiter Controllers with External MOSFETs
MAX16914/MAX16915
General Description
The MAX16914/MAX16915 low-quiescent-current over-
voltage and reverse-battery protection controllers are
designed for automotive and industrial systems that
must tolerate high-voltage transient and fault conditions.
These conditions include load dumps, voltage dips, and
reversed input voltages. The controllers monitor the input
voltage on the supply line and control two external pFETs
to isolate the load from the fault condition. The external
pFETs are turned on when the input supply exceeds
4.5V and stay on up to the programmed overvoltage
threshold. During high-voltage fault conditions, the con-
trollers regulate the output voltage to the set upper
threshold voltage (MAX16915), or switch to high resis-
tance (MAX16914) for the duration of the overvoltage
transient to prevent damage to the downstream circuitry.
The overvoltage event is indicated through an active-low,
open-drain output, OV.
The reverse-battery pFET behaves as an ideal diode,
minimizing the voltage drop when forward biased. Under
reverse bias conditions, the pFET is turned off, prevent-
ing a downstream tank capacitor from being discharged
into the source.
Shutdown control turns off the IC completely, discon-
necting the input from the output and disconnecting
TERM from its external resistor-divider to reduce the
quiescent current to a minimum.
Both devices are available in a 10-pin FMAX
M
package
and operate over the automotive -40NC to +125NC tem-
perature range.
Applications
Industrial
Features
S 4.5V to 19V Input Voltage Operation
S Transient Voltage Protection Up to +44V and -75V
S Adjustable Overvoltage Limit with Resistor-
Divider Shut Off in Shutdown
S Ideal Diode Reverse-Battery Protection
S Low Voltage Drop When Used with Properly Sized
External pFETs
S Back-Charge Prevention
S Overvoltage Indicator
S Shutdown Input
S 29µA Low Operating Current
S 6µA Low Shutdown Current
S Thermal-Overload Protection
S -40NC to +125NC Operating Temperature Range
S Small 10-Pin µMAX Package
19-4964; Rev 2; 10/14
Pin Configuration
Typical Operating Circuit
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
1
+
2
3
4
5
10
9
8
7
6
GATE2
SENSE OUT
TERM
SETSHDN
SENSE IN
GATE1
V
CC
MAX16914
MAX16915
TOP VIEW
GNDOV
V
CC
V
BATT
V
OUT
P2P1
GATE1
SENSE IN
R1
R2
SHDN
ON
OFF
MAX16914
MAX16915
GATE2
SENSE OUT
OV
TERM
SET
GND
OV
PART TEMP RANGE PIN-PACKAGE
MAX16914AUB+ -40NC to +125NC 10 FMAX
MAX16915AUB+ -40NC to +125NC 10 FMAX
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.