MAX16914 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Ideal Diode, Reverse-Battery, and Overvoltage Protection Switch/Limiter Controllers with External MOSFETs

19-4964; Rev 0; 9/09
Ideal Diode, Reverse-Battery, and Overvoltage Protection
Switch/Limiter Controllers with External MOSFETs
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.
Automotive
Industrial
Applications
Pin Configuration
TOP VIEW
+
V_CC 1
GATE1 2
SENSE IN 3
SHDN 4
MAX16914
MAX16915
OV 5
10 GATE2
9 SENSE OUT
8 TERM
7 SET
6 GND
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
S AEC-Q100 Qualified
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16914AUB/V+ -40NC to +125NC
10 FMAX
MAX16915AUB/V+ -40NC to +125NC
10 FMAX
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified device.
Typical Operating Circuit
VBATT
P1
P2
VOUT
ON
OFF
VCC _MAX16914 GATE2
MAX16915
GATE1
SENSE OUT
SENSE IN
SHDN
OV
TERM
SET
GND
OV
R1
R2
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products   1
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.