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MAX4920B

Maxim Integrated
Part Number MAX4920B
Manufacturer Maxim Integrated
Description Battery Power-Up Logic
Published May 5, 2020
Detailed Description MAX4919B/MAX4920B/MAX4921B 19-0614; Rev 0; 8/06 Battery Power-Up Logic with Overvoltage and Overcurrent Protection Ge...
Datasheet PDF File MAX4920B PDF File

MAX4920B
MAX4920B

Overview
MAX4919B/MAX4920B/MAX4921B 19-0614; Rev 0; 8/06 Battery Power-Up Logic with Overvoltage and Overcurrent Protection General Description The MAX4919B/MAX4920B/MAX4921B overvoltage protection controllers protect low-voltage systems against high-voltage faults up to +28V.
An internal 1.
8A (min) pFET with low RON (100mΩ) switches a battery to the load and also protects the battery against short-circuit faults.
When a short circuit occurs, the current through the internal pFET is limited for a blanking period.
If the short condition is present after the blanking period, the switch is latched off and remains off until one of the input signals (IN, HP_PWR, PWR_ON) is cycled.
The pFET is turned on by a logic-high voltage at PWR_HOLD, HP_PWR, PWR_ON, or IN .
The overvoltage thresholds (OVLO) are preset to +6.
38V (MAX4919B), +5.
80V (MAX4920B), and +4.
65V (MAX4921B).
When the input voltage drops below the undervoltage lockout (UVLO) threshold, the devices enter a low-current standby mode.
In shutdown mode, the current is reduced to 0.
4µA.
The MAX4919B/MAX4920B have a +4.
27V UVLO threshold, and the MAX4921B has a +2.
35V UVLO threshold.
The MAX4919B/MAX4920B/MAX4921B are offered in a small 14-pin TDFN package (3mm x 3mm) with an exposed paddle and are specified over the extended -40°C to +85°C temperature range.
Applications Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players EN ACOK PWR_HOLD BTO BTO ONOK GND Features o Input Overvoltage Protection Up to +28V o Preset Overvoltage Protection Trip Level 6.
38V (MAX4919B) 5.
80V (MAX4920B) 4.
65V (MAX4921B) o Adapter/Car-Kit Auto-Selector o Low-Current Undervoltage Lockout Mode o Internal 1.
8A (min) Battery Switchover FET o Integrated Low-Battery Detect o Battery Short-Circuit Protection o Low-Cost External nMOS Overvoltage FET o 14-Pin TDFN Package (3mm x 3mm) Pin Configuration TOP VIEW 14 13 12 11 10 9 8 MAX4919B MAX4920B MAX4921B + *EP 1234567 GP1 IN GN1 BTI BTI HP_PWR PWR_ON TDFN (3mm x 3mm) *EXPOSED PADDL...


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