MAX14738：High-Current Overvoltage Protectors with Adjustable OVLO

High-Current OVP for Mid-to-Low-Tier Portable Devices

The MAX14738/MAX14739 overvoltage protection devices feature a low 76mΩ (typ) on-resistance (RON) internal FET and protect low-voltage systems against voltage faults up to +36V. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components. The overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 4V and 20V. With the OVLO input set below the external OVLO select voltage, the devices automatically choose the accurate internal trip thresholds. The internal overvoltage thresholds (OVLO) are preset to 6.8V (typ) (MAX14738) or 10V (typ) (MAX14739). The devices are also protected against overcurrent events by an internal thermal shutdown. The MAX14738/MAX14739 are offered in a small, 6-bump 1.3mm x 0.9mm wafer-level package (WLP) with an exposed pad and operate over the -40°C to +85°C extended temperature range.

Key Features

Protects High-Power Portable Devices
- Wide Operating Input-Voltage Protection from +2.2V to +36V
- 3A Continuous-Current Capability
- Integrated 76mΩ (typ) nMOSFET Switch
Flexible Overvoltage Protection Design
- Adjustable Overvoltage Protection Trip Level
- Wide Adjustable OVLO Threshold Range from +4V to +20V
  - Preset Internal Accurate OVLO Thresholds: 6.8V±2.9% (MAX14738), 10V±3.0% (MAX14739)
Additional Protection Features Increase System Reliability
- Soft-Start to Minimize In-Rush Current
- Internal 18ms Startup Debounce
- Thermal-Shutdown Protection
Minimize PCB Area
- 6-Bump WLP (1.3mm x 0.9mm)

Applications/Uses

Mobile Internet Devices
Smartphones
Tablet PCs

Parametrics

Part Number	Channels	V_IN (V)	V_IN (V)	Over Voltage Trip Level (V)	Under Voltage Lockout (V)	t_GATE (On) (ms)	t_GATE (Off) (µs)	Oper. Temp. (°C)	Package/Pins
Part Number	Channels	min	max	Over Voltage Trip Level (V)	Under Voltage Lockout (V)	t_GATE (On) (ms)	t_GATE (Off) (µs)	Oper. Temp. (°C)	Package/Pins
MAX14738	1	2.2	36	Adjustable (6.8V)	2	4	0.2	-40 to +85	WLP/6
MAX14739	1	2.2	36	Adjustable (10V)	2	4	0.2	-40 to +85	WLP/6

Design kits & evaluation modules

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX14738EWT+	Active		WLP,;6 pin;WLP;	-40°C to +85°C	See data sheet
MAX14738EWT+T	Active		WLP,;6 pin;WLP;	-40°C to +85°C	See data sheet