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 controllers regulate the output voltage to the set upper threshold voltage (MAX16915), or switch to high resistance (MAX16914) for the duration of the overvoltage transient to prevent damage to the downstream circuitry.

Features

◆ 4.5V to 19V Input Voltage Operation

◆ Transient Voltage Protection Up to +44V and -75V

◆ Adjustable Overvoltage Limit with Resistor Divider Shut Off in Shutdown

◆ Ideal Diode Reverse-Battery Protection

◆ Low Voltage Drop When Used with Properly Sized External pFETs

◆ Back-Charge Prevention

◆ Overvoltage Indicator

◆ Shutdown Input

◆ 29µA Low Operating Current

◆ 6µA Low Shutdown Current

◆ Thermal-Overload Protection

◆ -40NC to +125NC Operating Temperature Range

◆ Small 10-Pin µMAX Package

◆ AEC-Q100 Qualified

Applications

Automotive

Industrial