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Allegro MicroSystems A89503KLPTR-5
- Part No.:
- A89503KLPTR-5
- Manufacturer:
- Allegro MicroSystems
- Category:
- Gate Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
A89503KLPTR-5.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
A89503KLPTR-5 from Allegro MicroSystems is an automotive-grade, 5 V logic-compatible, 80 V half-bridge N-channel MOSFET driver with integrated charge pump, independent high-side/low-side gate control, current sense amplifier, and ASIL B safety compliance. It delivers programmable gate drive timing (60–300 ns turn-on), 11 V regulated gate supply (VREG), and real-time diagnostics for brush DC, BLDC, and solenoid motor control in engine cooling fans and power seat actuators.
For engineers reviewing the A89503KLPTR-5 datasheet, A89503KLPTR-5 pinout, A89503KLPTR-5 application, or A89503KLPTR-5 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive diagnostic capabilities (VDS threshold, fault blank time, temperature warning), and two production-validated alternative parts for functional substitution in ISO 26262-compliant motor drive systems.
Technical Context
The A89503KLPTR-5 implements a dual-regulator architecture: a linear regulator (VIO = 4.5–5.5 V) powers logic I/O, while a charge pump (VREG = 9–11.7 V) sustains high-side gate drive across 5.5–80 V input. Its SPI-compatible serial interface enables full register access to diagnostics, VDS thresholds (0–3.15 V), and gate timing parameters (tR/tF = 60–300 ns).
It integrates a programmable current sense amplifier (gain = 10–50 V/V, offset = 0–2.5 V) with 2 MHz bandwidth and <1 µs settling time, plus independent HS/LS VDS monitors with configurable blanking (tVDQ = 0–102.3 µs) and overtemperature detection (TJF = 165–185 °C). All logic inputs are battery-compliant up to 80 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBB Range | 5.5 to 80 V - supports full automotive battery range including cold-crank (5.5 V) and load-dump (80 V) conditions without external regulation. |
| VIO Logic Supply | 4.5–5.5 V - matches standard 5 V microcontroller I/O, eliminating level-shifting in MCU-driven motor control designs. |
| VREG Output | 9–11.7 V at up to 33 mA - ensures >10 V gate drive for N-channel MOSFETs down to 7 V VBB, critical for reliable high-side switching. |
| Gate Drive Timing | Turn-on: 86–434 ns; Turn-off: 44–205 ns - enables precise PWM control of high-frequency motor phases with <25 ns propagation matching (ΔtHL). |
| Current Sense | Gain 10–50 V/V, offset 0–2.5 V, 2 MHz BW - supports accurate phase-current measurement in noisy BLDC inverters with fast transient response. |
| Diagnostics | VDS threshold (0–3.15 V), fault blank time (0–102.3 µs), TJ warning (125–145 °C), overtemp shutdown (165–185 °C) - enables robust short-circuit and thermal protection per ASIL B requirements. |
| Safety Compliance | ASIL B SEooC per ISO 26262, AEC-Q100 Grade 0 (−40 to +150 °C) - qualified for safety-critical automotive applications including HVAC blowers and steering column actuators. |
Pinout & Package
Package: 24-lead eTSSOP (7.8 mm × 4.4 mm, 1.2 mm max height) with exposed thermal pad (suffix LP); Pb-free, 100% matte-tin leadframe plating (suffix –T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Power Ground Reference | Primary return path for all internal regulators, gate drivers, and diagnostics; must be connected to low-impedance PCB ground plane. |
| DIAG (2) | Open-Drain Fault Indicator | Active-low output signaling aggregated faults (VREG UV/OV, overtemp, bridge shorts); sinks up to 17 mA for direct LED or MCU interrupt use. |
| ENABLE (3) | Bridge Enable Control | Logic-high enables gate outputs; logic-low forces GH/GL to high-impedance state, disabling both FETs without resetting registers. |
| RESETn (4) | Asynchronous Reset Input | Active-low signal resets internal logic, clears fault latches, and disables gate drives; tolerant to 0–80 V, with 200–500 mV hysteresis. |
| HS (5) | High-Side Logic Control | Direct CMOS input (5 V compatible) controlling GH output; combined with LSn determines bridge state per truth table (e.g., HS=1, LSn=0 → sourcing). |
| LSn (6) | Low-Side Logic Control (Active Low) | Inverted logic input enabling GL; when HS=0 and LSn=1, both outputs go low (sinking mode); battery-compliant to 80 V. |
| SDI (7) | SPI Data Input | Serial interface input accepting command/data bytes (MSB-first); synchronized to SCK rising edge; pulled down internally (50 kΩ). |
| SCK (8) | SPI Clock Input | Master-generated clock (min 50 ns high/low time); controls timing of SDI sampling and SDO output; pulled down internally (50 kΩ). |
| SDO (9) | SPI Data Output | Tri-state output driven during STRn low; returns register reads or status bits; leakage <1 µA when inactive. |
| STRn (10) | SPI Chip Select (Active Low) | Enables serial communication; falling edge initiates transaction; pulled up internally to VIO (50 kΩ). |
| CSO (11) | Current Sense Amplifier Output | Analog voltage output (0.3–4.8 V) proportional to load current (VID × gain + VOOS); drives ADC inputs directly with 1 µs settling. |
| CSM (12) | Current Sense –Input | Negative input of differential amplifier; connects to low-side shunt resistor ground side; common-mode range −1.5 to +2 V. |
| CSP (13) | Current Sense +Input | Positive input of differential amplifier; connects to low-side shunt resistor load side; rejects >52 dB CM noise at DC. |
| LSS (14) | Low-Side Source Terminal | Return path for low-side FET source; referenced to VLSS (VREG − 16 to 18 V); used for VGS monitoring and diagnostics. |
| GL (15) | Low-Side Gate Drive Output | High-current sink/source output (570–2100 mA peak) driving low-side N-MOSFET gate; active pull-down RDS(on) = 1.25–4.7 Ω. |
| GH (16) | High-Side Gate Drive Output | Bootstrap-referenced gate driver (VC − 16 to VC + 0.3 V) with 570–2100 mA sink capability; passive pull-down R = 0.25–1.8 MΩ. |
| S (17) | Load Connection (High-Side Source) | Connection point between high-side FET source and load; monitored by VBRG for VDS sensing; rated −5 to 85 V. |
| C (18) | Bootstrap Capacitor Terminal | Connects external bootstrap capacitor (typically 0.1 µF ceramic); supplies VC voltage above VS for high-side gate drive. |
| D (19) | Low-Side Drain Terminal | Connects to drain of low-side external MOSFET; forms half-bridge output node with S terminal; rated −16 to VS. |
| VREG (20) | Regulated Gate Drive Supply | Internally generated 9–11.7 V supply powering GL and logic; decoupled with ≥10 µF ceramic capacitor at pin. |
| CP2 (21) | Charge Pump Capacitor Terminal 2 | Second connection for external charge pump capacitor (CCP); works with CP1 to generate VREG from VBB. |
| CP1 (22) | Charge Pump Capacitor Terminal 1 | First connection for external charge pump capacitor (CCP); forms flying capacitor network with CP2 for VREG generation. |
| VBB (23) | Main Power Supply Input | Primary 5.5–80 V input powering charge pump, regulators, and diagnostics; requires reverse-polarity protection and local 10 µF ceramic decoupling. |
| VBRG (24) | High-Side Drain Voltage Sense | Monitors voltage at high-side FET drain; enables VDS-based short-circuit detection with programmable threshold (0–3.15 V). |
| PAD | Thermal Pad | Exposed copper pad under package; must be soldered to large GND copper area for thermal dissipation (RθJA = 28 °C/W on 4-layer PCB). |
Key Features
| Feature | Design Value |
|---|---|
| 5 V logic compatibility | Guaranteed VIH = 4.3–4.7 V and VIL = 0–0.3×VIO operation eliminates external level shifters when interfacing with 5 V MCUs. |
| Programmable VDS fault threshold | Configurable 0–3.15 V threshold per FET leg via SPI, enabling precise short-circuit detection across varying MOSFET RDS(on) and load conditions. |
| Independent HS/LS control with cross-conduction | Allows simultaneous high-side and low-side FET turn-on for active freewheeling or synchronous rectification in BLDC commutation. |
| Integrated current sense amplifier | 10–50 V/V gain, 0–2.5 V offset, and 2 MHz bandwidth enable accurate, low-latency phase current measurement without external op-amps. |
| ASIL B hardware safety element | Developed per ISO 26262 as SEooC with documented failure modes, FIT rate, and safety manual guidance for integration into ASIL B systems. |
| Bootstrap and charge pump coexistence | Charge pump maintains VREG ≥9 V while bootstrap supplies VC, ensuring robust high-side drive even during extended low-VBB conditions (e.g., cranking). |
Applications
| Engine Cooling Fan Control | Power Seat Actuator Drive |
|---|---|
|
Use Scenario: Regulating 12 V/24 V brushed DC fan speed via PWM in automotive engine bays with ambient temperatures up to 150 °C. IC Role / Device Role / Timing Role: Half-bridge pre-driver providing isolated, high-current gate signals to external N-MOSFETs; manages bootstrap charging and VDS fault detection during rapid direction reversal. Use Value: Enables silent, efficient fan modulation with integrated diagnostics preventing MOSFET destruction during stalled-rotor events. |
Use Scenario: Driving bidirectional 12 V linear actuators for seat recline/fore-aft motion in passenger vehicles with EMI-sensitive infotainment proximity. IC Role / Device Role / Timing Role: High-side/low-side gate controller with programmable turn-on/off timing (60–300 ns) to minimize shoot-through risk during direction changes. Use Value: Delivers precise position control with <1 µs current sense settling, reducing mechanical jerk and meeting CISPR 25 Class 5 EMC limits. |
| Electric Power Steering (EPS) Assist Motor | Transmission Solenoid Valve Driver |
|
Use Scenario: Controlling 48 V BLDC assist motor in steer-by-wire EPS systems requiring functional safety and torque ripple minimization. IC Role / Device Role / Timing Role: SPI-configured half-bridge driver with independent HS/LS control, current sense feedback, and ASIL B diagnostics for torque loop closure. Use Value: Supports field-oriented control (FOC) with <25 ns GH/GL propagation matching and real-time fault reporting via DIAG pin. |
Use Scenario: Driving high-current (2 A+) transmission solenoids in automatic gearboxes where rapid valve actuation and overcurrent protection are critical. IC Role / Device Role / Timing Role: Robust gate driver with 570–2100 mA sink capability and programmable overcurrent threshold (0.3–4.8 V) for solenoid coil monitoring. Use Value: Prevents coil burnout during stuck-valve conditions using VDS-based short detection with configurable blanking (0–102.3 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ6532-AEC1 | 40 V max VBB, no integrated current sense amp, SPI interface only (no direct logic control), lower gate drive current (±1.2 A vs ±2.1 A). | Limited to 12 V/24 V systems; requires external current sensing; unsuitable for 48 V BLDC or high-power solenoids. | Select when cost-sensitive 24 V fan control is needed and external sensing is acceptable. |
| STGD18N40LZ | Discrete high-side/low-side driver pair (no integrated charge pump or diagnostics); 400 V max VDS; no ASIL compliance or SPI interface. | Requires external bootstrap, regulators, and fault logic; not qualified for automotive safety systems; higher BOM count. | Select only for non-safety, non-diagnostic 400 V industrial motor drives where integration is secondary. |
Compared with MPQ6532-AEC1 and STGD18N40LZ, the A89503KLPTR-5 uniquely combines 80 V operation, integrated current sensing, ASIL B compliance, and dual-control (logic + SPI) in a single 24-pin package-making it the only option for 48 V/80 V automotive safety-critical half-bridge applications requiring diagnostic traceability and design reuse.
Availability
A89503KLPTR-5 is available at Aetrix Electronics and suitable for engine cooling fans, power seat actuators, electric power steering assist motors, and transmission solenoid valve drivers requiring stable component supply across automotive production lifecycles.
Supply support for A89503KLPTR-5 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 global leader in precision sensing and power ICs, headquartered in Manchester, NH, with decades of automotive semiconductor expertise and AEC-Q100 qualification infrastructure.
The A89503 product line was developed specifically for ASIL B-compliant, high-voltage half-bridge motor control in demanding automotive environments-including under-hood cooling, chassis actuation, and electrified powertrain subsystems.
FAQ
What logic voltage does the A89503KLPTR-5 support?
The A89503KLPTR-5 is specifically configured for 5 V logic compatibility: its VIO regulator outputs 4.5–5.5 V, and input thresholds are guaranteed at VIH = 4.3–4.7 V and VIL ≤ 0.3×VIO. This eliminates level-shifting when interfacing with standard 5 V microcontrollers, unlike the A89503KLPTR-3 variant which targets 3.3 V systems.
How does the A89503KLPTR-5 maintain high-side gate drive during low battery conditions?
The A89503KLPTR-5 uses a dual-stage power architecture: a charge pump generates VREG (9–11.7 V) to power the low-side gate driver and logic, while a bootstrap capacitor (connected to pin C) supplies VC above VS for high-side drive. This allows full gate drive (>10 V) down to VBB = 7 V, with guaranteed functionality-even if degraded-down to 5.5 V during cold-crank events.
Can the A89503KLPTR-5 drive both MOSFETs simultaneously?
Yes-the A89503KLPTR-5 supports cross-conduction mode where both high-side and low-side FETs are turned on simultaneously. This is enabled via logic inputs (HS=1, LSn=0) or SPI register control (HSR=1, LSR=1), and is explicitly supported in the functional description and truth tables for applications like active freewheeling and synchronous rectification in BLDC motor drives.
What diagnostic data can be read from the A89503KLPTR-5 via SPI?
Through its SPI interface, the A89503KLPTR-5 provides full access to diagnostic registers containing real-time status of VREG undervoltage/overvoltage, VBRG over/undervoltage, high-side and low-side VDS faults, overtemperature warnings (125–145 °C) and shutdown (165–185 °C), current sense amplifier saturation, and fault blanking timer expiration-enabling comprehensive system-level health monitoring.
Is the A89503KLPTR-5 qualified for automotive under-hood use?
Yes-the A89503KLPTR-5 is AEC-Q100 Grade 0 qualified (−40 to +150 °C ambient), features integrated thermal protection (TJF = 165–185 °C), and is packaged in a thermally enhanced 24-lead eTSSOP with exposed pad (RθJA = 28 °C/W on 4-layer PCB). Its design meets under-hood reliability requirements for engine cooling, HVAC, and transmission control modules.
A89503KLPTR-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Synchronous
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 5.5V ~ 80V
- Logic Voltage - VIL, VIH:
- 0.8V, 2.4V
- Current - Peak Output (Source, Sink):
- -
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 235ns, 97ns
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP-EP
A89503KLPTR-5 FAQ
1.How can I place an order for A89503KLPTR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for A89503KLPTR-5 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 A89503KLPTR-5 reliable?
The price and inventory of A89503KLPTR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A89503KLPTR-5 is usually 5 days.
3.What payment methods are accepted for A89503KLPTR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A89503KLPTR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A89503KLPTR-5?
A89503KLPTR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A89503KLPTR-5 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 A89503KLPTR-5?
For technical support, including A89503KLPTR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A89503KLPTR-5 requirements.
6.How does Aetrix verify that A89503KLPTR-5 is sourced from the original manufacturer or authorized distributors?
All A89503KLPTR-5 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 A89503KLPTR-5 meets industry standards.
7.What is the process for return or replacement of A89503KLPTR-5?
All A89503KLPTR-5 units undergo pre-shipment inspection (PSI). If there is an issue with A89503KLPTR-5, 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 A89503KLPTR-5 part is unused and in its original packaging.
Return procedure for A89503KLPTR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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