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

Allegro MicroSystems A4919GLPTR-5-T

Name: A4919GLPTR-5-T
Brand: Allegro MicroSystems
SKU: A4919GLPTR-5-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: A4919GLPTR-5-T

Manufacturer:: Allegro MicroSystems

Category:: Gate Drivers

Package:: 28-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: A4919GLPTR-5-T.pdf

Description:: IC GATE DRVR HI/LOW SIDE 28TSSOP

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Product details

Overview

A4919GLPTR-5-T from Allegro MicroSystems is a three-phase N-channel MOSFET gate driver IC with integrated 5 V low-dropout (LDO) regulator, operating from 5.5 V to 50 V supply, delivering high-current gate drive for BLDC motor control in battery-powered power tools and CPAP machines.

For engineers reviewing the A4919GLPTR-5-T datasheet, A4919GLPTR-5-T pinout, A4919GLPTR-5-T application, or A4919GLPTR-5-T equivalent, this page provides verified functional identity, validated LP-package pin mapping, confirmed 5 V LDO output capability, short-circuit protection architecture, and real-world motor phase fault detection behavior - all directly traceable to Allegro's A4919-DS Rev. 8 documentation.

Technical Context

The A4919GLPTR-5-T implements a charge pump–based gate drive supply (VREG ≈ 13 V) enabling full gate drive down to VBB = 7 V, with fallback operation at reduced drive strength down to 5.5 V. Its six independent TTL-compatible logic inputs (AHI/ALO/BHI/BLO/CHI/CLO) enable arbitrary commutation schemes under external microcontroller control.

Integrated protection includes per-phase drain-source voltage monitoring via programmable VDSTH pin (0.2–2.0 V threshold range), cross-conduction prevention logic, and open-drain FAULT output signaling short-to-supply, short-to-ground, undervoltage, and overtemperature events. The 5 V LDO (V5) supplies external circuitry only and is disabled during overtemperature warning.

Key Specifications

Parameter	Value and Actual Design Meaning
VBB Supply Range	5.5 V to 50 V - supports wide-input battery systems (e.g., 2S–12S Li-ion) without external pre-regulation.
V5 Output Voltage	4.85–5.25 V @ ≤70 mA - stable regulated 5 V rail for MCU, sensors, or level-shifters; requires ≥1 µF/≤250 mΩ ceramic capacitor.
VREG Output	12.5–13.75 V - regulated gate drive supply enabling >10 V turn-on for N-MOSFETs even at low VBB.
Gate Drive Strength	R_DS(on)UP = 5–13 Ω (high-side), R_DS(on)DN = 1.5–4.6 Ω (low-side) - ensures fast switching of typical 5–50 mΩ power MOSFETs.
Fault Detection	VDS threshold programmable via VDSTH (0.2–2.0 V), ±100 mV offset tolerance - enables precise short-circuit trip point tuning per motor winding resistance.
Thermal Resistance	R_θJA = 28 °C/W (LP package, 4-layer PCB) - enables >2 W continuous dissipation with standard thermal layout.
Logic Input Threshold	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - compatible with both 3.3 V and 5 V microcontrollers without level shifting.

Pinout & Package

Supplied in 28-pin TSSOP with exposed thermal pad (package type LP, suffix T), lead-free with 100% matte-tin plating. Thermal pad must be soldered to PCB ground plane for thermal and electrical integrity.

Pin	Circuit Role	Design Meaning
LSS	Low-side source return	Common return path for GLA/GLB/GLC sink current; must connect to low-impedance PCB trace to MOSFET source nodes.
GLC, GLB, GLA	Low-side gate drive outputs	Drive N-MOSFET gates referenced to LSS; each capable of 150 mA sink/source with <2.4 Ω on-resistance.
GHC, GHB, GHA	High-side gate drive outputs	Bootstrap-referenced drives for upper N-MOSFETs; output swing = V_Cx – 0.2 V (high), V_Sx + 0.3 V (low).
SC, SB, SA	Motor phase connections	Connect to motor windings; also serve as bootstrap capacitor negative terminals and VDS sense points.
CC, CB, CA	Bootstrap capacitor positive terminals	Each connects to dedicated 100–470 nF ceramic capacitor between Cx and Sx for high-side floating supply.
VREG	Regulated gate drive supply	13 V nominal output powering low-side drivers and charging bootstrap caps; requires ≥10 µF bulk capacitor.
CP1, CP2	Charge pump capacitor terminals	Connect 470 nF ceramic capacitor between CP1–CP2 to sustain VREG during low-VBB operation.
V5	5 V LDO output	Dedicated 5 V supply for external logic; not used internally; disabled during overtemperature warning.
VDSTH	VDS fault threshold programming	Analog input setting short-circuit detection level (0.2–2.0 V); high-impedance (>1 MΩ) allows resistor-divider configuration.
FAULT	Open-drain fault indicator	Active-high signal pulled high externally; asserts for VDS fault, VBB UVLO, or T_J > 170 °C.
AHI/ALO/BHI/BLO/CHI/CLO	Phase control inputs	TTL-compatible logic inputs controlling individual high/low-side drivers; internal crossover protection prevents shoot-through.
VBB	Main power supply	Primary input (5.5–50 V); powers all internal circuitry including LDO, charge pump, and logic; requires local 100 nF + 10 µF decoupling.

Key Features

Feature	Design Value
Three-phase N-MOSFET gate drive	Enables efficient, scalable BLDC motor control using discrete external FETs - avoids integrated power stage thermal limitations.
Programmable VDS fault threshold	Voltage-controlled trip point (0.2–2.0 V on VDSTH) allows precise short-circuit detection calibrated to motor phase resistance and bus voltage.
Integrated 5 V LDO regulator	Provides clean, regulated 5 V supply (4.85–5.25 V, ≤70 mA) for external microcontrollers or sensors - eliminates need for separate LDO.
Bootstrap charge management	Automatic bootstrap capacitor recharge via low-side conduction ensures reliable high-side turn-on without external timing circuitry.
Cross-conduction protection	Hardware lockout prevents simultaneous AHI/ALO, BHI/BLO, or CHI/CLO activation - eliminates shoot-through risk regardless of controller timing errors.

Applications

Battery-Powered Power Tools	CPAP Machines
Use Scenario: Cordless drill/driver with 18–40 V Li-ion battery pack requiring high-efficiency, compact BLDC motor control. IC Role / Device Role / Timing Role: Three-phase gate driver coordinating external N-MOSFET half-bridges; receives PWM and commutation signals from MCU. Use Value: Enables >95% motor drive efficiency at 20 A phase current while providing real-time short-circuit shutdown (<4.5 µs blank time) to protect expensive power FETs.	Use Scenario: Medical-grade continuous positive airway pressure device needing quiet, reliable, and fail-safe motor control for blower assembly. IC Role / Device Role / Timing Role: Gate driver managing BLDC blower motor; integrates VDS monitoring and overtemperature warning for ISO 13485-compliant safety reporting. Use Value: Delivers certified fault diagnostics (open-drain FAULT output) and 5 V LDO for sensor/MCU supply - reducing BOM count and board space by one IC.
Lawn and Garden Equipment	Industrial Grinders
Use Scenario: Brushless string trimmer or hedge trimmer operating from 24–60 V battery packs in harsh outdoor environments. IC Role / Device Role / Timing Role: High-voltage gate driver supporting wide VBB range; uses VBRG sensing for accurate high-side drain voltage measurement. Use Value: Maintains full gate drive (>10 V) down to 7 V VBB and operates correctly at 5.5 V - extends usable battery runtime and prevents unexpected shutdown.	Use Scenario: High-torque industrial angle grinder requiring robust motor control with overload and stall protection. IC Role / Device Role / Timing Role: Fault-aware gate driver detecting phase shorts via per-MOSFET VDS monitoring and asserting FAULT for system-level shutdown. Use Value: Reduces field failure rate by catching winding shorts before catastrophic FET failure - supported by ±100 mV VSTGO/VSTPO offset tolerance.

Battery-Powered Power Tools

CPAP Machines

Use Scenario: Cordless drill/driver with 18–40 V Li-ion battery pack requiring high-efficiency, compact BLDC motor control.

IC Role / Device Role / Timing Role: Three-phase gate driver coordinating external N-MOSFET half-bridges; receives PWM and commutation signals from MCU.

Use Value: Enables >95% motor drive efficiency at 20 A phase current while providing real-time short-circuit shutdown (<4.5 µs blank time) to protect expensive power FETs.

Use Scenario: Medical-grade continuous positive airway pressure device needing quiet, reliable, and fail-safe motor control for blower assembly.

IC Role / Device Role / Timing Role: Gate driver managing BLDC blower motor; integrates VDS monitoring and overtemperature warning for ISO 13485-compliant safety reporting.

Use Value: Delivers certified fault diagnostics (open-drain FAULT output) and 5 V LDO for sensor/MCU supply - reducing BOM count and board space by one IC.

Lawn and Garden Equipment

Industrial Grinders

Use Scenario: Brushless string trimmer or hedge trimmer operating from 24–60 V battery packs in harsh outdoor environments.

IC Role / Device Role / Timing Role: High-voltage gate driver supporting wide VBB range; uses VBRG sensing for accurate high-side drain voltage measurement.

Use Value: Maintains full gate drive (>10 V) down to 7 V VBB and operates correctly at 5.5 V - extends usable battery runtime and prevents unexpected shutdown.

Use Scenario: High-torque industrial angle grinder requiring robust motor control with overload and stall protection.

IC Role / Device Role / Timing Role: Fault-aware gate driver detecting phase shorts via per-MOSFET VDS monitoring and asserting FAULT for system-level shutdown.

Use Value: Reduces field failure rate by catching winding shorts before catastrophic FET failure - supported by ±100 mV VSTGO/VSTPO offset tolerance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-phase gate driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP6532GQ-Z	No integrated LDO; 3.3 V logic-only supply; no VDSTH programming; fixed 1.2 V VDS threshold.	Lacks programmable fault threshold and 5 V supply - requires external LDO and comparator circuit for short detection.	Choose when cost sensitivity outweighs design flexibility and diagnostic granularity.
DRV8305PWP	Integrated current sense amplifiers; SPI interface; no VREG or V5 output; 12 V gate drive only.	Provides real-time phase current feedback but removes analog VDSTH control and dual-supply capability.	Prefer when closed-loop torque control is required and external 5 V rail is already available.

Compared with MP6532GQ-Z and DRV8305PWP, the A4919GLPTR-5-T uniquely combines programmable VDS fault detection, self-contained 5 V LDO, and robust 13 V gate drive regulation - making it optimal for cost-sensitive, safety-critical BLDC systems where external component count and diagnostic precision matter.

Availability

A4919GLPTR-5-T is available at Aetrix Electronics and suitable for battery-operated power tools, CPAP machines, lawn and garden equipment requiring stable component supply across long production lifecycles.

Supply support for A4919GLPTR-5-T 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

Allegro MicroSystems is a U.S.-based semiconductor company specializing in magnetic sensing, power ICs, and motor control solutions, with design centers in North America, Europe, and Asia.

The A4919 product line delivers high-voltage, high-current gate drivers for brushless DC motors - engineered specifically for rugged, battery-powered applications demanding fault resilience, wide input range, and minimal external components.

FAQ

What is the function of the V5 pin on the A4919GLPTR-5-T?

The V5 pin on the A4919GLPTR-5-T is the output of an integrated 5 V low-dropout regulator, delivering up to 70 mA for external circuitry such as microcontrollers or sensors. It is not used internally, requires ≥1 µF ceramic capacitance to GND for stability, and shuts down during overtemperature warning - ensuring safe operation during thermal faults.

Does the A4919GLPTR-5-T support sleep mode?

No, the A4919GLPTR-5-T does not support sleep mode. Sleep mode is only available on the A4919x (no-LDO) variants like A4919GLPTR-T. The A4919GLPTR-5-T maintains full functionality at all times - all gate drivers, diagnostics, and the 5 V LDO remain active even when all logic inputs are held low.

How is short-circuit protection implemented in the A4919GLPTR-5-T?

The A4919GLPTR-5-T implements per-phase short-circuit protection via drain-source voltage monitoring on each external MOSFET. The VDSTH pin accepts an analog voltage (0.2–2.0 V) to set the trip threshold, with ±100 mV offset tolerance. A fault triggers the open-drain FAULT pin and disables affected gate drives within 4.5 µs blank time.

What package type is used for the A4919GLPTR-5-T?

The A4919GLPTR-5-T uses the 28-pin TSSOP package with exposed thermal pad (Allegro package type LP). It measures 9.7 mm × 4.4 mm × 1.2 mm, is lead-free, and features 100% matte-tin leadframe plating. The thermal pad must be soldered to a PCB ground plane for thermal performance and electrical noise immunity.

Can the A4919GLPTR-5-T drive both high-side and low-side N-channel MOSFETs?

Yes, the A4919GLPTR-5-T drives six N-channel MOSFETs - three high-side (GHA/GHB/GHC) and three low-side (GLA/GLB/GLC) - using bootstrap capacitors (CA/CB/CC to SA/SB/SC) for high-side floating supply and VREG-referenced low-side drive. Integrated crossover control prevents shoot-through during switching transitions.

A4919GLPTR-5-T Specifications

Product attributes: Attribute value

Manufacturer:: Allegro MicroSystems

Series:: -

Package/Case:: 28-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Driven Configuration:: High-Side or Low-Side

Channel Type:: 3-Phase

Number of Drivers:: 6

Gate Type:: N-Channel MOSFET

Voltage - Supply:: 5.5V ~ 50V

Logic Voltage - VIL, VIH:: 0.8V, 2V

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

Input Type:: TTL

High Side Voltage - Max (Bootstrap):: -

Rise / Fall Time (Typ):: 35ns, 20ns

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-TSSOP-EP

A4919GLPTR-5-T FAQ

1.How can I place an order for A4919GLPTR-5-T through Aetrix?

Please submit a Request for Quotation (RFQ) for A4919GLPTR-5-T 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 A4919GLPTR-5-T reliable?

The price and inventory of A4919GLPTR-5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A4919GLPTR-5-T is usually 5 days.

3.What payment methods are accepted for A4919GLPTR-5-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A4919GLPTR-5-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for A4919GLPTR-5-T?

A4919GLPTR-5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your A4919GLPTR-5-T 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 A4919GLPTR-5-T?

For technical support, including A4919GLPTR-5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A4919GLPTR-5-T requirements.

6.How does Aetrix verify that A4919GLPTR-5-T is sourced from the original manufacturer or authorized distributors?

All A4919GLPTR-5-T 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 A4919GLPTR-5-T meets industry standards.

7.What is the process for return or replacement of A4919GLPTR-5-T?

All A4919GLPTR-5-T units undergo pre-shipment inspection (PSI). If there is an issue with A4919GLPTR-5-T, 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 A4919GLPTR-5-T part is unused and in its original packaging.

Return procedure for A4919GLPTR-5-T:

1.Submit a request within 90 days.

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

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