MAX14728
PRODUCTIONDual-Input, Bidirectional Overvoltage Protector with Automatic Path Control
One OVP to Protect Dual-Input-Powered Portable Devices
- Part Models
- 2
- 1ku List Price
- Starting From $1.76
Overview
- Protects Portable Devices with Dual-Input Power
- Wide Operating Input-Voltage Protection from 3V to 28V
- 5A Continuous-Current Capability
- Integrated 73mΩ (typ) nMOSFET Switch
- Allows Flexible and Precise Design in OVLO Implementation
- Wide Adjustable OVLO Threshold Range from 4V to 14V
- OTG Enables Allow OUT Supply INA/INB
- Preset Accurate Internal OVLO Thresholds:
- 13.75V ±2% (MAX14727)
- 10V ±2% (MAX14728)
- 5.92V ±2% (MAX14731)
- Increases System Reliability Through Premium Security
- Surge Immunity Over +100V
- Soft-Start to Minimize In-Rush Current
- Internal 15ms Startup Debounce
- Thermal Shutdown Protection
- Minimizes Board Space With Compact Package
- 30-Bump, 2.6mm x 2.2mm WLP
The MAX14727/MAX14728/MAX14731 provide protection to valuable consumer circuits against two positive voltage faults up to +28VDC. An internal clamp also protects the devices from surges up to 100V. The devices automatically select the input source, with channel A being the primary supply.
These devices feature reverse bias-blocking capabilities. Unlike other overvoltage protectors, when the devices are disabled, the voltage applied to OUT does not feed back into either INA or INB. These devices also feature two OTG enable pins (OTG_ENA, OTG_ENB) that allow OUT voltage to supply the corresponding input when OUT is higher than the output startup voltage.
These overvoltage-protection devices feature high-voltage, low on-resistance (73mΩ, typ) internal FETs, effectively minimizing a voltage drop across the device. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components. The devices also have thermal-shutdown protection against overload conditions.
The overvoltage-protection threshold can be adjusted with optional external resistors to any voltage between 4V and 14V. The devices automatically choose the appropriate internal trip thresholds when the overvoltage-lockout input is set lower than the external OVLO select voltage. The internal OVLO are preset to 13.75V (typ) (MAX14727), 10V (typ) (MAX14728), or 5.92V (typ) (MAX14731).
The devices are specified over the extended -40°C to +85°C temperature range, and are available in a 30-bump, wafer-level package (WLP).
Applications
- e-Readers
- Smartphones
- Tablets
Documentation
Data Sheet 1
Design Note 1
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX14728EWV+ | WLCSP | ||
| MAX14728EWV+T | WLCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareEvaluation Kits
Evaluation Kit for the MAX14727/MAX14728/MAX14731
Resources
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