My Inquiry
My Account
Allegro MicroSystems A4919GETTR-3-T
- Part No.:
- A4919GETTR-3-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Gate Drivers
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
A4919GETTR-3-T.pdf
- Description:
- IC GATE DRVR HI/LOW SIDE 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
A4919GETTR-3-T from Allegro MicroSystems is a three-phase N-channel MOSFET gate driver IC with integrated 3.3 V LDO regulator, designed for BLDC motor control in battery-powered systems. It supports 5.5–50 V supply voltage, delivers >10 V gate drive down to 7 V via charge pump, and provides phase-by-phase short-to-supply/ground detection with open-drain FAULT output. Used in power tools and CPAP machines.
For engineers reviewing the A4919GETTR-3-T datasheet, A4919GETTR-3-T pinout, A4919GETTR-3-T application, or A4919GETTR-3-T equivalent, key selection criteria include its QFN-28 package with exposed thermal pad, integrated 3.3 V LDO output (V3), bootstrap-based high-side drive architecture, and six independent logic-level inputs (AHI/ALO/BHI/BLO/CHI/CLO) for external commutation control.
Technical Context
The A4919GETTR-3-T implements a charge pump regulator (CP1/CP2) to sustain >10 V gate drive for high-side N-MOSFETs at VBB ≥ 7 V, and operates functionally down to 5.5 V with reduced drive. Its integrated 3.3 V LDO (V3) powers external circuitry but not internal logic - VBB remains sole supply for gate drivers, charge pump, and diagnostics.
Phase protection uses per-MOSFET drain-source voltage monitoring via SA/SB/SC and VDSTH-programmable thresholds, with fault reporting consolidated on a single open-drain FAULT pin. Crossover control prevents shoot-through by enforcing dead-time between complementary high/low-side drive signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBB Supply Range | 5.5–50 V: Enables operation across 2S–12S Li-ion battery packs and industrial DC rails. |
| V3 LDO Output | 3.15–3.53 V @ ≤70 mA: Powers microcontrollers, sensors, or level-shifters without external regulator. |
| VREG Gate Drive Supply | 12–13.75 V: Provides regulated voltage for low-side drivers and bootstrap capacitor charging. |
| Gate Drive Strength | RDS(on)UP = 5–13 Ω (high-side), RDS(on)DN = 1.5–4.6 Ω (low-side): Supports fast switching of low-RDS(on) MOSFETs. |
| Fault Detection | VDS threshold programmable 0.2–2.0 V via VDSTH pin: Enables precise short-circuit trip points per motor phase. |
| Thermal Resistance | RθJA = 32 °C/W (QFN-28 on 4-layer PCB): Requires minimal copper area for 105°C ambient operation. |
| Logic Input Threshold | VIH = 2.0 V, VIL = 0.8 V: Compatible with both 3.3 V and 5 V microcontroller GPIOs. |
Pinout & Package
Package: 28-terminal 5 mm × 5 mm × 0.90 mm QFN with exposed thermal pad (suffix ET, Pb-free, matte-tin plating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB | Main power supply input | Supplies all internal circuitry including charge pump, LDO, and gate drivers; requires local ceramic decoupling. |
| V3 | 3.3 V LDO output | Provides regulated 3.3 V to external logic; requires ≥1 µF ceramic capacitor with ESR ≤ 250 mΩ to GND. |
| GHA, GHB, GHC | High-side gate drive outputs | Drive gates of external N-MOSFETs in upper half of 3-phase bridge; each referenced to SA/SB/SC. |
| GLA, GLB, GLC | Low-side gate drive outputs | Drive gates of external N-MOSFETs in lower half; referenced to LSS, not GND. |
| SA, SB, SC | Motor phase connections | Connect to motor windings; serve as return paths for bootstrap capacitors and VDS sensing nodes. |
| AHI, ALO, BHI, BLO, CHI, CLO | Logic control inputs | Independent TTL-compatible inputs controlling each gate driver; no internal commutation logic. |
| FAULT | Open-drain fault indicator | Active-high signal indicating VDS fault, undervoltage, or overtemperature; requires external pull-up. |
| VDSTH | VDS threshold programming pin | Analog input setting per-phase short-circuit detection level; high-impedance, supports resistor-divider configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Charge pump gate drive | Maintains >10 V high-side gate drive at VBB ≥ 7 V, enabling efficient N-MOSFET use without P-MOSFET compromises. |
| Integrated 3.3 V LDO (V3) | Eliminates need for external regulator to power MCU or interface logic, reducing BOM count and layout area. |
| Per-phase VDS monitoring | Independent SA/SB/SC sensing with programmable VDSTH allows tailored short-circuit response per motor winding. |
| Crossover protection | Hardware-enforced dead-time prevents simultaneous high/low-side conduction, eliminating shoot-through risk. |
| Bootstrap capacitor management | Internal charge pump and VREG regulation simplify bootstrap design; startup sequence requires initial GLx activation. |
Applications
| Lawn and Garden Equipment | Battery-Powered Power Tools |
|---|---|
Use Scenario: Cordless string trimmers and brush cutters using 24–48 V battery packs with sensorless BLDC motors. IC Role / Device Role / Timing Role: Three-phase gate driver coordinating external N-MOSFETs; receives commutation timing from MCU via discrete logic inputs. Use Value: High-efficiency gate drive enables >95% inverter efficiency; integrated VDS monitoring protects against blade stall faults. | Use Scenario: 18–40 V cordless drills and impact drivers requiring high peak torque and thermal robustness. IC Role / Device Role / Timing Role: Gate driver IC managing 6 external MOSFETs in 3-phase inverter; V3 powers motor controller MCU and current-sense ADC. Use Value: 3.3 V LDO reduces system component count; fault reporting via FAULT pin enables rapid shutdown during jam events. |
| Industrial Grinders | CPAP Machines |
Use Scenario: Portable industrial angle grinders operating from 36 V nominal battery packs with aggressive duty cycles. IC Role / Device Role / Timing Role: High-current gate driver delivering fast turn-on/off to low-RDS(on) MOSFETs; thermal pad ensures reliable heat dissipation. Use Value: RθJP = 2 °C/W (QFN) enables sustained 10 A phase current without derating; VBB range accommodates battery voltage sag. | Use Scenario: Medical-grade continuous positive airway pressure devices requiring ultra-low acoustic noise and high reliability. IC Role / Device Role / Timing Role: Precision BLDC driver for quiet, low-vibration blower motor; V3 powers pressure sensor and communication interface. Use Value: Programmable VDSTH allows fine-tuned short-circuit sensitivity to avoid false trips during pressure transients. |
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 | Integrated 5 V LDO only (no 3.3 V option); no VDSTH programmability; fixed 1.2 V VDS threshold. | Suitable where fixed-threshold protection suffices and 5 V bias is preferred; lacks flexibility for multi-voltage systems. | Select MP6532GQ-Z if 5 V LDO matches system rail and simplified fault setup is acceptable. |
| DRV8305PWP | Includes integrated current sense amplifiers and SPI interface; no standalone LDO; 3.3 V output derived from internal regulator. | Better suited for closed-loop current-controlled systems requiring real-time feedback; adds complexity vs. A4919GETTR-3-T's simplicity. | Select DRV8305PWP when current measurement and digital configurability outweigh BOM simplicity. |
Compared with MP6532GQ-Z and DRV8305PWP, the A4919GETTR-3-T uniquely combines user-programmable VDS fault thresholds, dedicated 3.3 V LDO output, and hardware crossover protection - making it optimal for cost-sensitive, high-reliability BLDC drives where analog fault tuning and dual-voltage biasing are required.
Availability
A4919GETTR-3-T is available at Aetrix Electronics and suitable for battery-operated power tools, CPAP machines, and industrial grinders requiring stable component supply across extended production lifecycles.
Supply support for A4919GETTR-3-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 and power ICs for motion control and energy-efficient systems.
The A4919 product line delivers high-current three-phase gate drivers with integrated regulators and diagnostics, targeting compact, high-efficiency BLDC motor inverters in portable and medical equipment.
FAQ
What is the function of the V3 pin on the A4919GETTR-3-T?
The V3 pin on the A4919GETTR-3-T is the output of an integrated 3.3 V low-dropout regulator, capable of supplying up to 70 mA to external circuitry such as microcontrollers or sensors. It is not used to power internal logic - the VBB pin remains the sole supply for gate drivers, charge pump, and diagnostics. A minimum 1 µF ceramic capacitor with ESR ≤ 250 mΩ must be placed between V3 and GND for stability.
Does the A4919GETTR-3-T support sleep mode?
No, the A4919GETTR-3-T does not support sleep mode. Sleep mode is only available on A4919 variants without an LDO regulator (e.g., A4919GLPTR-T). On the A4919GETTR-3-T, all logic inputs remain active regardless of state, and quiescent current remains at ~10 mA in operational mode - no low-power state is implemented in this 3.3 V LDO variant.
How is high-side gate drive achieved in the A4919GETTR-3-T?
The A4919GETTR-3-T achieves high-side gate drive using an internal charge pump (CP1/CP2) that generates a regulated VREG (~13 V), which charges external bootstrap capacitors (CA/CB/CC) connected between Cx and Sx terminals. When the corresponding low-side MOSFET turns on (pulling Sx low), the bootstrap capacitor charges; when Sx rises, the capacitor supplies gate voltage above the phase voltage, enabling N-MOSFET high-side conduction.
Can the A4919GETTR-3-T drive P-channel high-side MOSFETs?
No, the A4919GETTR-3-T is specifically designed to drive N-channel MOSFETs only - both high-side and low-side. Its high-side gate drivers (GHA/GHB/GHC) are floating, bootstrap-referenced outputs intended for N-MOSFETs in high-side position. Driving P-channel devices would require inverted logic, different voltage referencing, and is not supported by the A4919GETTR-3-T's architecture or electrical specifications.
What is the purpose of the VDSTH pin on the A4919GETTR-3-T?
The VDSTH pin on the A4919GETTR-3-T sets the drain-source voltage threshold for short-circuit detection on each motor phase. Applying 0.2–2.0 V to VDSTH configures the trip point with specified accuracy; below 0.1 V disables VDS fault reporting; above 2.7 V defaults to internal 1.2 V threshold. This enables precise, application-specific fault sensitivity without external comparators.
A4919GETTR-3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 28-VFQFN 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, 1.5V
- 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-QFN (5x5)
A4919GETTR-3-T FAQ
1.How can I place an order for A4919GETTR-3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A4919GETTR-3-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 A4919GETTR-3-T reliable?
The price and inventory of A4919GETTR-3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A4919GETTR-3-T is usually 5 days.
3.What payment methods are accepted for A4919GETTR-3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A4919GETTR-3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A4919GETTR-3-T?
A4919GETTR-3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A4919GETTR-3-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 A4919GETTR-3-T?
For technical support, including A4919GETTR-3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A4919GETTR-3-T requirements.
6.How does Aetrix verify that A4919GETTR-3-T is sourced from the original manufacturer or authorized distributors?
All A4919GETTR-3-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 A4919GETTR-3-T meets industry standards.
7.What is the process for return or replacement of A4919GETTR-3-T?
All A4919GETTR-3-T units undergo pre-shipment inspection (PSI). If there is an issue with A4919GETTR-3-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 A4919GETTR-3-T part is unused and in its original packaging.
Return procedure for A4919GETTR-3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
A4919GETTR-3-T Tags
-
ZXGD3009E6TA
Diodes Incorporated
-
1EDN7512BXTSA1
Infineon Technologies
-
UCC27517DBVR
Texas Instruments
-
MCP1416T-E/OT
Microchip Technology
-
MCP1402T-E/OT
Microchip Technology
-
MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
-
IRS2005STRPBF
Infineon Technologies
-
IRS2008STRPBF
Infineon Technologies
-
IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
