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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

Texas Instruments UCC27517ADBVR

Name: UCC27517ADBVR
Brand: Texas Instruments
SKU: UCC27517ADBVR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UCC27517ADBVR

Manufacturer:: Texas Instruments

Category:: Gate Drivers

Package:: SC-74A, SOT-753

Datasheet:: UCC27517ADBVR.pdf

Description:: IC GATE DRVR LOW-SIDE SOT23-5

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Product details

Overview

UCC27517ADBVR from Texas Instruments is a single-channel, high-speed, low-side MOSFET/IGBT gate driver with symmetrical 4-A peak source/sink drive capability, 13-ns typical propagation delay, and –5-V input voltage tolerance. It operates from 4.5 V to 18 V and supports both inverting (IN−) and non-inverting (IN+) configurations - enabling flexible integration in GaN-based DC–DC converters and motor control half-bridges.

For engineers reviewing the UCC27517ADBVR datasheet, UCC27517ADBVR pinout, UCC27517ADBVR application, or UCC27517ADBVR equivalent, key selection considerations include its dual-input logic flexibility, UVLO-protected power-up behavior, rail-to-rail output swing, TTL/CMOS-compatible input thresholds independent of VDD, and robust negative-input voltage handling for noisy gate-drive environments.

Technical Context

The UCC27517ADBVR uses a shoot-through-minimizing output stage architecture delivering symmetrical 4-A peak current into capacitive loads at 12 V VDD. Its dual-input structure allows either IN+ (non-inverting) or IN− (inverting) to serve as the primary PWM control input, while the unused pin functions as an enable/disable signal with internal pull-up/pull-down biasing.

Input thresholds are fixed at 2.2 V (high) and 1.2 V (low) with 1-V hysteresis - ensuring noise immunity across –40°C to +140°C - and absolute input voltage ratings extend to –6 V, decoupled from VDD bias. Internal UVLO holds OUT low below 3.7 V (rising) and releases above 4.65 V, with 0.3-V hysteresis preventing chatter during supply transients.

Key Specifications

Parameter	Value and Actual Design Meaning
VDD Range	4.5 V to 18 V - enables direct compatibility with 5-V, 12-V, and 15-V bias rails and emerging sub-5-V GaN gate requirements.
Peak Output Current	±4 A - provides sufficient drive strength for fast switching of high-Qg MOSFETs and GaN HEMTs up to 1 MHz.
Propagation Delay	13 ns (typ) - ensures minimal timing skew in high-frequency synchronous rectification and digital power control loops.
Input Voltage Range	–6 V to 20 V - allows safe operation under negative transient coupling (e.g., Miller-induced spikes) without external clamping.
Rise/Fall Time	9 ns / 7 ns (typ, C_L = 1.8 nF, VDD = 12 V) - supports clean edge integrity in hard-switched topologies with <10-ns dead-time margins.
UVLO Threshold	4.2 V (rising), 3.9 V (falling) - guarantees glitch-free startup/shutdown and prevents partial turn-on during brownout conditions.
Input Logic Type	TTL/CMOS compatible with VDD-independent thresholds - simplifies interface to 3.3-V microcontrollers and digital power controllers without level-shifting.

Pinout & Package

SOT-23 (DBV) 5-pin package: 2.90 mm × 1.60 mm body size, surface-mount, thermally enhanced bottom-pad variant not present - suitable for space-constrained power stages.

Pin/Terminal	Circuit Role	Design Meaning
1 - VDD	Bias supply input	Primary power rail for internal logic and output stage; requires local 0.1-μF ceramic + 1-μF bulk bypassing to sustain 4-A pulsed current.
2 - GND	Reference ground	Common return for all signals and output current; must be low-inductance connection to minimize ground bounce during switching.
3 - IN+	Non-inverting input	Accepts PWM signal for non-inverting operation; internally pulled down - must be tied to VDD or driven high to enable output when IN− is active.
4 - IN−	Inverting input	Accepts PWM signal for inverting operation; internally pulled up - must be tied to GND or driven low to enable output when IN+ is active.
5 - OUT	Driver output	Low-side gate-drive node; rail-to-rail swing (VDD to GND); capable of sourcing/sinking 4-A peaks into MOSFET gate capacitance.

Key Features

Feature	Design Value
Dual-input logic configuration	Single device supports both inverting and non-inverting gate-drive modes - eliminates need for separate part numbers or external inverters in multi-topology designs.
–5-V input voltage capability	Withstands negative transients on IN+/IN− pins without damage or false triggering - critical for high-dV/dt half-bridge layouts where Miller coupling induces negative spikes.
VDD-independent input thresholds	Fixed 2.2 V/1.2 V logic levels ensure consistent timing across 4.5–18 V supply range - avoids threshold drift in wide-input-range industrial supplies.
UVLO with hysteresis	Output held low until VDD exceeds 4.2 V and remains low until VDD drops below 3.9 V - prevents erratic switching during power sequencing and brownouts.
Floating-input protection	Internal pull-up (IN−) and pull-down (IN+) resistors force OUT low if either input floats - eliminates risk of unintended power-device turn-on during debug or fault conditions.

Applications

High-Frequency DC–DC Converters	GaN-Based Power Supplies
Use Scenario: 1-MHz synchronous buck converter powering FPGA core voltage with tight regulation and low EMI. IC Role / Device Role / Timing Role: Low-side gate driver controlling synchronous rectifier MOSFET; delivers precise 13-ns-delayed, rail-to-rail gate pulses synchronized to controller PWM. Use Value: Enables >95% efficiency at 1 MHz by minimizing conduction loss and dead-time penalty via 4-A drive strength and sub-10-ns rise/fall times.	Use Scenario: 48-V-to-12-V GaN half-bridge DC–DC module for server power delivery with <100-ns dead time. IC Role / Device Role / Timing Role: Low-side driver for GaN eHEMT; handles –5-V input transients from high dV/dt switching and interfaces directly to 3.3-V digital controller. Use Value: Eliminates external level shifters and negative clamp diodes due to VDD-independent thresholds and –6-V absolute input rating.
Motor Control Half-Bridges	Uninterruptible Power Supplies (UPS)
Use Scenario: 24-V BLDC inverter stage driving three-phase motor with field-oriented control. IC Role / Device Role / Timing Role: Low-side gate driver per phase leg; configured in non-inverting mode with IN− used as hardware enable for safety shutdown. Use Value: Dual-input design allows independent hardware disable without modifying controller firmware - meeting IEC 61800-5-2 functional safety requirements.	Use Scenario: Online double-conversion UPS with bidirectional AC/DC and DC/AC stages using SiC MOSFETs. IC Role / Device Role / Timing Role: Low-side driver in PFC boost stage and inverter leg; operates across full 4.5–18 V VDD range during battery backup transitions. Use Value: Wide VDD range and 140°C junction rating support reliable operation during extended overload and thermal stress conditions in sealed UPS enclosures.

High-Frequency DC–DC Converters

GaN-Based Power Supplies

Use Scenario: 1-MHz synchronous buck converter powering FPGA core voltage with tight regulation and low EMI.

IC Role / Device Role / Timing Role: Low-side gate driver controlling synchronous rectifier MOSFET; delivers precise 13-ns-delayed, rail-to-rail gate pulses synchronized to controller PWM.

Use Value: Enables >95% efficiency at 1 MHz by minimizing conduction loss and dead-time penalty via 4-A drive strength and sub-10-ns rise/fall times.

Use Scenario: 48-V-to-12-V GaN half-bridge DC–DC module for server power delivery with <100-ns dead time.

IC Role / Device Role / Timing Role: Low-side driver for GaN eHEMT; handles –5-V input transients from high dV/dt switching and interfaces directly to 3.3-V digital controller.

Use Value: Eliminates external level shifters and negative clamp diodes due to VDD-independent thresholds and –6-V absolute input rating.

Motor Control Half-Bridges

Uninterruptible Power Supplies (UPS)

Use Scenario: 24-V BLDC inverter stage driving three-phase motor with field-oriented control.

IC Role / Device Role / Timing Role: Low-side gate driver per phase leg; configured in non-inverting mode with IN− used as hardware enable for safety shutdown.

Use Value: Dual-input design allows independent hardware disable without modifying controller firmware - meeting IEC 61800-5-2 functional safety requirements.

Use Scenario: Online double-conversion UPS with bidirectional AC/DC and DC/AC stages using SiC MOSFETs.

IC Role / Device Role / Timing Role: Low-side driver in PFC boost stage and inverter leg; operates across full 4.5–18 V VDD range during battery backup transitions.

Use Value: Wide VDD range and 140°C junction rating support reliable operation during extended overload and thermal stress conditions in sealed UPS enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC27511DBVR	Asymmetrical drive (4-A source / 8-A sink), 6-pin SOT-23, no negative input voltage rating.	Better suited for bootstrap-fed high-side drivers requiring stronger sink current; lacks –5-V input tolerance.	Select UCC27511DBVR only when sink-current dominance is required and negative transients are absent.
TPS28225DRVT	4-A symmetrical drive, 5-pin SOT-23, 5-V–14-V VDD range, no –5-V input rating, lower temp grade (–40°C to 125°C).	Optimized for cost-sensitive 5-V systems; insufficient for 18-V industrial rails or GaN gate drive below 4.5 V.	Choose TPS28225DRVT for 5-V-only applications where extended VDD range and negative input capability are unnecessary.

Compared with UCC27511DBVR and TPS28225DRVT, the UCC27517ADBVR uniquely combines symmetrical 4-A drive, –5-V input tolerance, 4.5–18-V operation, and dual-input configurability - making it the only option among the three qualified for GaN half-bridges, wide-input industrial SMPS, and safety-critical enable/disable implementations.

Availability

UCC27517ADBVR is available at Aetrix Electronics and suitable for high-frequency DC–DC converters, GaN-based power supplies, and motor control half-bridges requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for UCC27517ADBVR 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 specializing in analog, embedded processing, and power management technologies, with leadership in high-performance analog ICs for industrial, automotive, and computing markets.

The UCC27517ADBVR belongs to TI's UCC2751x family of high-speed low-side gate drivers - engineered specifically for efficient, robust switching of wide-bandgap power devices (GaN, SiC) and high-frequency silicon MOSFETs in demanding power conversion systems.

FAQ

What is the maximum allowable negative voltage on the IN+ and IN− pins of the UCC27517ADBVR?

The UCC27517ADBVR specifies an absolute maximum input voltage range of –6 V to 20 V on both IN+ and IN− pins, per Section 8.1 of the datasheet. This –6-V rating enables reliable operation under worst-case Miller-induced negative transients in half-bridge configurations. The device is tested to handle –5 V continuously, and the –6-V limit provides margin against short-duration spikes. This capability eliminates the need for external negative clamping diodes in most GaN and SiC gate-drive layouts.

Can the UCC27517ADBVR be used in a high-side gate-drive configuration?

No, the UCC27517ADBVR is strictly a low-side gate driver and cannot be used for high-side drive. Its output stage is referenced to GND, with no floating supply or level-shifting capability. Attempting to use it in a high-side configuration would result in incorrect logic translation, potential latch-up, and violation of absolute maximum ratings. For high-side drive, TI recommends complementary parts such as the UCC27531 (single-channel high-side) or UCC27624 (dual-channel high-/low-side).

How does the dual-input architecture of the UCC27517ADBVR affect PCB layout and signal routing?

The dual-input architecture of the UCC27517ADBVR allows either IN+ or IN− to serve as the primary PWM input, with the other used for hardware enable/disable - reducing need for external logic gates. Layout must ensure both inputs are properly biased: IN− requires a GND tie or active-low signal; IN+ requires a VDD tie or active-high signal. Unused inputs must never float, as internal pull-up/pull-down resistors will hold OUT low. Keep input traces short and away from noisy power nodes to preserve the 1-V hysteresis noise immunity.

Does the UCC27517ADBVR require external bootstrap components when driving N-channel MOSFETs in high-side applications?

No - the UCC27517ADBVR is not designed for high-side drive and therefore does not support or require bootstrap circuitry. It is a dedicated low-side driver with GND-referenced output. Bootstrap components (e.g., flying capacitor, diode) are only relevant for high-side drivers like the UCC27714 or IRS2007. Using the UCC27517ADBVR in a high-side role would violate its pin functionality and electrical specifications, risking permanent damage.

What thermal derating guidance applies to the UCC27517ADBVR in continuous 4-A output operation?

At 4-A peak current and 12-V VDD, the UCC27517ADBVR's power dissipation depends on duty cycle and switching frequency. With R_θJA = 217.6°C/W (SOT-23), continuous DC output current is limited to 300 mA per Section 8.1 - meaning sustained 4-A operation must be pulsed (≤0.5 µs pulse width). For high-frequency switching, thermal performance relies on PCB copper area: ≥1 in² of 2-oz copper connected to GND pin reduces R_θJA significantly. Derate output current linearly above 100°C ambient per Figure 14's propagation delay vs. temperature data.

UCC27517ADBVR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: Low-Side

Channel Type:: Single

Number of Drivers:: 1

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 4.5V ~ 18V

Logic Voltage - VIL, VIH:: 1V, 2.4V

Current - Peak Output (Source, Sink):: 4A, 4A

Input Type:: Inverting, Non-Inverting

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 8ns, 7ns

Operating Temperature:: -40°C ~ 140°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

UCC27517ADBVR FAQ

1.How can I place an order for UCC27517ADBVR through Aetrix?

Please submit a Request for Quotation (RFQ) for UCC27517ADBVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for UCC27517ADBVR reliable?

The price and inventory of UCC27517ADBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC27517ADBVR is usually 5 days.

3.What payment methods are accepted for UCC27517ADBVR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC27517ADBVR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UCC27517ADBVR?

UCC27517ADBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UCC27517ADBVR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for UCC27517ADBVR?

For technical support, including UCC27517ADBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC27517ADBVR requirements.

6.How does Aetrix verify that UCC27517ADBVR is sourced from the original manufacturer or authorized distributors?

All UCC27517ADBVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UCC27517ADBVR meets industry standards.

7.What is the process for return or replacement of UCC27517ADBVR?

All UCC27517ADBVR units undergo pre-shipment inspection (PSI). If there is an issue with UCC27517ADBVR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The UCC27517ADBVR part is unused and in its original packaging.

Return procedure for UCC27517ADBVR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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