MAX14701EWC+T - 5.915V OVP Protector w/ Surge | Maxim Integrated
MPN: MAX14701EWC+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.67 | $16.70 |
| 100 | $1.48 | $148.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.12 | $1,120.00 |
MAX14701EWC+T Overview
An OVP (overvoltage protector) is a power-path protection IC placed between an upstream supply (charger, USB VBUS, external adapter) and a downstream load (PMIC, SoC, battery). Its role is to disconnect or clamp the rail when the input voltage rises above a safe limit, preventing damage to sensitive downstream silicon. OVP protectors sit in the power management hierarchy below TVS diodes (which absorb the energy) and above PMIC input stages (which assume safe input voltage). Fast OVP response (sub-microsecond turn-off) is critical when protecting processors rated only to 5V from mis-wired 12V or 20V USB-PD adapters.
Key features include a 5.915V factory-trimmed overvoltage threshold with ±0.5 percent accuracy, sub-microsecond OVP response time, internal 100 mA to 1 A current-limit switch, and built-in surge protection rated for IEC 61000-4-5 (8 kV contact / 15 kV air ESD-style transients). The device operates from a wide 2.4V to 5.5V supply range while monitoring higher-voltage input transients, and provides an open-drain FLAG output to indicate OVP events. The WLP-12 (1.5 mm x 1.8 mm wafer-level package) is approximately 80 percent smaller than SOT-23-6 alternatives, enabling compact mobile and wearable designs.
The MAX14701 uses a back-to-back MOSFET architecture with an integrated charge pump for gate drive, achieving low on-resistance and clean turn-off during overvoltage events. Internal blanking timers prevent false trips on capacitive load transients during hot-attach.
Typical applications include smartphone and wearable charging path protection, USB Type-C VBUS protection, tablet and ultrabook input protection, Bluetooth and TWS earbud overvoltage protection, IoT sensor node power path, and any 5V rail exposed to user-replaceable cables or adapters. For higher voltage rails (12V / 20V USB-PD), consider the MAX14702 (13.95V threshold) or MAX14703 (23.05V threshold) in the same WLP-12 footprint.
Design tip: place the MAX14701EWC+T within 10 mm of the input connector so the internal TVS clamp can absorb surge energy before it propagates downstream; place a 1 uF ceramic bypass cap on VOUT.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, including a parameter-by-parameter comparison and BOM-friendly recommended companion parts.
Drop-in alternatives for MAX14701EWC+T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX14701EWC+T (same form factor and footprint) — differing in Function, OVP Threshold Accuracy, Operating Temperature, Package, Surge Protection.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX14701EWC+
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →MAX14702EWC+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX14703EWC+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX14701EWC+T Specifications
| Function | Overvoltage Protector with Surge Protection |
| OVP Threshold (Factory Trim) | 5.915 V (nominal) |
| OVP Threshold Accuracy | +/-0.5 % |
| Input Voltage Operating Range | 2.4 V to 5.5 V |
| Surge Protection | Integrated TVS, IEC 61000-4-5 rated |
| Current Limit | 100 mA to 1 A (programmable) |
| FLAG Output | Open-drain, active-low OVP indicator |
| Package | 12-bump WLP / WLCSP (1.5 mm x 1.8 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Lead-Free Finish | Yes |
MAX14701EWC+T Pin Configuration
| Pin A1 | VIN — Input supply (2.4V-5.5V operating, surge-tolerant higher) |
| Pin A2 | VOUT — Output to load |
| Pin A3 | GND — Ground |
| Pin B1 | FLAG — Open-drain OVP indicator (active low) |
| Pin B2 | EN — Enable input |
| Pin B3 | SET — Current-limit set resistor |
| Pin C1 | NC — Not connected (per datasheet) |
| Pin C2 | NC — Not connected (per datasheet) |
| Pin C3 | NC — Not connected (per datasheet) |
| Pin D1 | NC — Not connected (per datasheet) |
| Pin D2 | NC — Not connected (per datasheet) |
| Pin D3 | NC — Not connected (per datasheet) |
Typical Applications
MAX14701EWC+T is suitable for 7 applications: Smartphone Charging Path Protection, Wearable and TWS Earbud OVP, USB Type-C VBUS Protection, Tablet and Ultrabook Input Rail, IoT Sensor Node Power Path, Industrial 5V Sensor Power Rail, Bluetooth Module 5V Supply.
Smartphone Charging Path Protection
The MAX14701EWC+T protects the 5V VBUS rail of a smartphone from misapplied 9V, 12V, or 20V USB-PD adapters that fail to negotiate. Its 5.915V factory-trimmed threshold with +/-0.5 percent accuracy sits between the 5V USB default and the 9V USB-PD level, so any unauthorized voltage step triggers sub-microsecond MOSFET turn-off. The integrated IEC 61000-4-5 surge clamp absorbs transients at the connector so the downstream PMIC and SoC remain safe. The 12-bump WLP fits inside a 1.5 mm x 1.8 mm area, leaving room for the rest of the charging path ICs on the main board.
Recommended
Wearable and TWS Earbud OVP
In wearables and TWS earbuds the charging cradle exposes a 5V contact pin that is hot-plugged by the user, raising the risk of ESD and overvoltage events. The MAX14701EWC+T handles both: the integrated TVS absorbs IEC 61000-4-5 surge pulses and the OVP comparator disconnects the load when the cradle applies more than 5.915V. Its sub-microsecond response time prevents the small Li-ion cell and PMIC from being damaged by a miswired or contaminated charger. The WLP-12 footprint matches the small form factor typical of earbud charging PCBs.
Recommended
USB Type-C VBUS Protection
The MAX14701EWC+T is designed for the VBUS rail of a USB Type-C port when the device only supports 5V default-current or 1.5A / 3A Type-C current modes but is exposed to a USB-PD charger. The OVP comparator prevents the 9V or higher VBUS from reaching the downstream 5V PMIC. The surge clamp handles ESD and hot-plug transients from cable insertion. Compared with a discrete TVS diode + PTC fuse combination, the MAX14701EWC+T offers auto-recovery when the OVP condition clears, avoiding user-replaceable fuse logistics in the field.
Recommended
Tablet and Ultrabook Input Rail
Tablets and ultrabooks ship with USB-C chargers rated up to 100W. When the internal SoC and PMIC are designed only for 5V legacy operation, the MAX14701EWC+T placed at the input protects against a USB-PD adapter that fails to negotiate correctly and applies full 20V to a 5V-only section. Its 1A current limit covers legacy 5V/2A charging paths while the integrated surge clamp protects against cable discharge transients. The WLP-12 package occupies less board area than the SOT-23-6 footprint of competing discrete solutions.
Recommended
IoT Sensor Node Power Path
Battery-powered IoT sensor nodes typically accept a 5V input for the boost charger. The MAX14701EWC+T guards the charger IC and downstream microcontroller from an overvoltage event caused by a damaged cable or wrong adapter. The OVP threshold is well matched to 5V rails and the sub-microsecond response prevents the boost inductor and MOSFET from being stressed. The 12-bump WLP integrates the full protection IC plus surge clamp into a footprint that fits on a coin-cell-sized sensor PCB, with the FLAG output driving an interrupt to the host MCU.
Recommended
Industrial 5V Sensor Power Rail
In industrial 24V-bus environments with intermediate 5V rails, an OVP event can occur if a wiring fault applies 24V to a 5V-rated sensor or PLC input. The MAX14701EWC+T provides the 5.915V cutoff that protects 5V analog front ends and 3.3V downstream MCUs. The integrated surge clamp handles the inductive kickback from solenoids and motor loads sharing the same wiring harness. The open-drain FLAG output can be wired back to the PLC for fault logging without adding optocouplers.
Recommended
Bluetooth Module 5V Supply
Bluetooth audio modules and IoT radios typically operate from a 3.3V or 1.8V LDO downstream of a 5V rail. The MAX14701EWC+T at the 5V input protects the LDO and the radio from miswired power adapters. Its compact WLP-12 footprint lets it share the small module PCB. The programmable current limit between 100 mA and 1 A fits common Bluetooth module peak-current profiles, and the FLAG output indicates an OVP event to the host MCU for diagnostic logging.
Recommended
Recommended Products Summary
Engineering reference data for MAX14701EWC+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX14701EWC+ | MAX14702EWC+T | MAX14703EWC+T |
|---|---|---|---|---|
| Package | 12-bump WLP (1.5 mm x 1.8 mm) | 12-bump WLP (1.5 mm x 1.8 mm) - same | 12-bump WLP (1.5 mm x 1.8 mm) - same | 12-bump WLP (1.5 mm x 1.8 mm) - same |
| Brand | Analog Devices (Maxim Integrated) | Analog Devices (Maxim Integrated) - same | Analog Devices (Maxim Integrated) - same | Analog Devices (Maxim Integrated) - same |
| OVP Threshold | 5.915 V | 5.915 V - same | 13.95 V (+135%) | 23.05 V (+290%) |
| OVP Accuracy | +/-0.5 % | +/-0.5 % | +/-0.5 % | +/-0.5 % |
| Integrated Surge Protection | Yes (IEC 61000-4-5) | Yes | Yes | Yes |
| Operating Input Range | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 13.95 V | 2.4 V to 23.05 V |
| FLAG Output | Open-drain, active-low | Open-drain, active-low | Open-drain, active-low | Open-drain, active-low |
Key Differentiators
- Smallest OVP + surge footprint in its class (vs MAX14702EWC+T)
- Integrated surge + OVP single-chip solution (vs TPS25200DRLR (TI))
- Pin-compatible family for multiple voltage rails (vs MAX14701EWC+ (no +T suffix))
Design Notes
Place the MAX14701EWC+T within 10 mm of the input connector so the integrated TVS surge clamp can absorb the surge energy before it propagates downstream. Use a 1 uF X7R ceramic bypass capacitor on VOUT and a 1 uF X7R on VIN, both placed as close to the device as possible. The WLP-12 bumps require non-solder-mask-defined (NSMD) pads on the PCB for reliable assembly; design the land pattern to the JEDEC WLP recommendation in the datasheet.
Estimated: at 5V VBUS, 1A load, and 25 C ambient, the MAX14701EWC+T dissipates (RON * I^2). For a typical 100 milliohm RON and 1 A load, dissipation is approximately 0.1 W, well within the WLP-12 thermal envelope. Avoid placing the device directly under a hotspot or near a thermal mass; the WLP uses the PCB copper for heat spreading, so a 0.5 square inch copper pour on the opposite side is recommended for high-current paths.
Do not assume the integrated TVS replaces a dedicated TVS diode for very high-energy surges; if the surge specification exceeds the MAX14701EWC+T IEC 61000-4-5 rating, add an external TVS such as SMAJ5.0A or SMBJ5.0A at the connector. Ensure the SET resistor for the current-limit pin is a 1 percent tolerance part; an out-of-tolerance resistor will shift the current limit and may trigger false trips or fail to protect during a fault. Verify FLAG is pulled up to a logic-level rail (1.8V or 3.3V) compatible with the downstream controller.
Compliance Information
RoHS compliant per Maxim Integrated / Analog Devices product page. Industrial temperature grade -40C to +85C. AEC-Q100 qualification not stated on distributor pages; consult Analog Devices for automotive-grade variant.
