www.DataSheet4U.com
19-0874; Rev 0; 7/07
High-Voltage OVP with Battery Switchover
General Description
The MAX4959/MAX49...
www.DataSheet4U.com
19-0874; Rev 0; 7/07
High-
Voltage OVP with Battery Switchover
General Description
The MAX4959/MAX4960 over
voltage protection controllers protect low-
voltage systems against high-
voltage faults of up to +28V. When the input
voltage exceeds the over
voltage lockout (OVLO) threshold, these devices turn off an external pFET to prevent damage to the protected components. The under
voltage 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) that switches in the battery when the AC adapter is unplugged. The under
voltage and over
voltage 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 10-pin µMAX packages and are specified for operation over the extended -40°C to +85°C temperature range. o Over
voltage Protection Up to +28V o ± 2.5% Accurate Externally Adjustable OVLO/UVLO Thresholds o Battery Switchover pFET Control o Protection Against Incorrect Power Adapter o Low (100µA Typ) Supply Current o 25ms Input Debounce Timer o 25ms Blanking Time o 10-Pin (2mm x 2mm) µDFN and 10-Pin µMAX Packages
Features
MAX4959/MAX4960
Ordering Information
PART TEMP RANGE PINTO...