MAX4959

Obsolete

High-Voltage OVP with Battery Switchover

High-Voltage OVP Providing Overvoltage Lockout and Undervoltage Lockout with Battery Switchover

Data Sheet (Rev. 1) Product Selection Table

Viewing:

Overview

Overvoltage Protection Up to +28V
±2.5% Accurate Externally Adjustable OVLO/UVLO Thresholds
Battery Switchover pFET Control
Protection Against Incorrect Power Adapter
Low (100µA Typ) Supply Current
25ms Input Debounce Timer
25ms Blanking Time
10-Pin (2mm x 2mm) µDFN Packages

The MAX4959/MAX4960 overvoltage protection controllers protect low-voltage systems against high-voltage faults of up to +28V. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, these devices turn off an external pFET to prevent damage to the protected components. The undervoltage lockout (UVLO) threshold holds the external pFET off until the input voltage rises to the correct level. An additional safety feature latches off the pFET when an incorrect low-power adapter is plugged in.

The MAX4959/MAX4960 control an external battery switchover pFET (P2) (see Figures 4 and 6 in the full data sheet) that switches in the battery when the AC adapter is unplugged. The undervoltage and overvoltage trip levels can be adjusted with external resistors.

The input is protected against ±15kV HBM ESD when bypassed with a 1µF ceramic capacitor to ground. All devices are available in a small 10-pin (2mm x 2mm) µDFN and are specified for operation over the extended -40°C to +85°C temperature range.

Applications