Texas Instruments UCD7201PWPR

Overview

UCD7201PWPR from Texas Instruments is a dual low-side ±4-A MOSFET gate driver IC with programmable cycle-by-cycle current limiting, integrated 3.3-V/10-mA regulator, and digital controller interface compatibility for digitally controlled DC/DC converters. It features 20-ns IN-to-OUT propagation delay, 25-ns CS-to-OUT response, and operates from 4.5 V to 15 V supply across –40°C to 105°C.

For engineers reviewing the UCD7201PWPR datasheet, UCD7201PWPR pinout, UCD7201PWPR application, or UCD7201PWPR equivalent, this page delivers verified technical context on TrueDrive™ output architecture, programmable ILIM threshold (0.25–1.0 V), CLF flag latching behavior, HTSSOP-14 thermal performance (RθJA = 50.7°C/W), and dual-channel handshaking for push-pull and half-bridge topologies.

Technical Context

The UCD7201PWPR implements two independent low-side drivers using Texas Instruments' TrueDrive™ architecture-hybrid bipolar/MOSFET output stages delivering ±4 A peak during the Miller plateau region for efficient MOSFET switching. Each channel accepts 3.3-V logic inputs up to 2 MHz with internal Schmitt triggers.

It integrates a fast current-sense comparator referenced to the ILIM pin (0.25–1.0 V range), triggering a latched CLF flag when CS exceeds ILIM −25 mV; the flag resets only on the next rising edge of IN1 or IN2. The device includes UVLO (4.25–4.75 V) and supports local protection even if the host digital controller fails.

Key Specifications

Pinout & Package

UCD7201PWPR is housed in a PowerPAD™ HTSSOP-14 package (4.40 mm × 5.00 mm), thermally enhanced with exposed die pad for PCB heat sinking. Pin 1 is NC; Pin 14 is NC; Pin 9 is PGND (power ground return); Pin 4 and Pin 5 are AGND (analog ground) and must be separated from PGND at the board level for noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-side gate driver applications.

Compared with LM5113SDX/NOPB and UCC27524ADGNR, UCD7201PWPR uniquely integrates current sensing, programmable threshold, latched CLF flag, and 3.3-V regulator-making it the only option among the three that enables autonomous, sub-50-ns hardware-level overcurrent shutdown without external components or controller intervention.

Availability

UCD7201PWPR is available at Aetrix Electronics and suitable for digitally controlled DC/DC converters, half-bridge motor drives, and isolated power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for UCD7201PWPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company designing analog and embedded processing chips for industrial, automotive, and communications applications.

The UCD7201PWPR belongs to the UCD7K family of digital-control-compatible gate drivers, engineered specifically for fast, autonomous cycle-by-cycle current limiting in digitally regulated power stages-targeting high-reliability telecom, server, and motor control systems.

FAQ

What is the default current limit threshold for UCD7201PWPR when the ILIM pin is left unconnected?

When the ILIM pin is left floating, UCD7201PWPR defaults to an internal current limit threshold of 0.55 V, corresponding to approximately 11-A peak current with a 50-mΩ sense resistor. This value is confirmed in Section 8.3.3 of the SLUS645F datasheet and remains stable across temperature (±0.03 V from –40°C to 105°C). The UCD7201PWPR uses this default to enable immediate operation without external programming.

How does the CLF flag behave during continuous overcurrent events on UCD7201PWPR?

The CLF flag on UCD7201PWPR latches high upon first overcurrent detection (when CS > ILIM −25 mV) and remains asserted until the next rising edge appears on either IN1 or IN2. During sustained overcurrent, UCD7201PWPR holds both OUT1 and OUT2 low continuously-no automatic retry or hiccup mode. This behavior ensures deterministic fault containment and requires explicit host controller intervention to resume operation.

Can UCD7201PWPR drive high-side MOSFETs directly?

No, UCD7201PWPR is strictly a dual low-side gate driver and cannot drive high-side N-channel MOSFETs directly due to lack of bootstrap or floating supply capability. Its PVDD and PGND pins are referenced to power ground, and its outputs swing only between PGND and PVDD. To drive high-side switches, UCD7201PWPR must be paired with external level-shifting circuitry or used in low-side-only configurations such as synchronous rectifiers or half-bridge bottom switches.

What is the purpose of separating AGND and PGND in UCD7201PWPR layout?

AGND (Pin 4) serves the analog current-sense comparator and 3.3-V regulator reference, while PGND (Pin 9) carries high di/dt switching currents from OUT1/OUT2. Separating these grounds prevents noise coupling from power switching transients into the sensitive CS comparator-ensuring accurate current limit triggering. The UCD7201PWPR datasheet mandates separate AGND and PGND traces joined at a single point near the device's exposed thermal pad to maintain signal integrity.

Does UCD7201PWPR support 5-V logic inputs, or is it strictly 3.3-V compatible?

UCD7201PWPR accepts only 3.3-V logic-level inputs on IN1 and IN2, with absolute maximum ratings of –0.3 V to 3.6 V. Its input thresholds are centered at 1.65 V (VIT+) and 1.33 V (VIT−), optimized for 3.3-V CMOS signaling. Applying 5-V logic directly violates the absolute maximum rating and risks permanent damage. For 5-V controller interfaces, a level-shifter or resistive divider is required before connecting to UCD7201PWPR.