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Allegro MicroSystems ARG82801KLVATR-1
- Part No.:
- ARG82801KLVATR-1
- Manufacturer:
- Allegro MicroSystems
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ARG82801KLVATR-1.pdf
- Description:
- PMIC FOR SAFETY RELATED SYSTEMS
- Quantity:
- Payment:
- Shipping:
Inventory:4,583
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Product details
Overview
ARG82801KLVATR-1 from Allegro MicroSystems is a fully integrated automotive power management IC (PMIC) featuring a 2.2 MHz buck/buck-boost pre-regulator, four linear regulators (VUC: 3.3/5.0 V @ 350 mA; V5C: 5 V @ 115 mA; V5P1/V5P2: 120 mA tracking regulators), and four independent floating gate drivers with integrated charge pumps. It delivers tightly regulated power to microcontrollers, CAN transceivers, and sensors in underhood control modules.
For engineers reviewing the ARG82801KLVATR-1 datasheet, ARG82801KLVATR-1 pinout, ARG82801KLVATR-1 application, or ARG82801KLVATR-1 equivalent, this device supports ASIL D safety-critical systems per ISO 26262, offers SPI-based diagnostics and rail control, and integrates dual bandgaps for enhanced fault detection in high-reliability automotive power domains.
Technical Context
The ARG82801KLVATR-1 implements a programmable buck or buck-boost pre-regulator (VREG = 5.35 V ±100 mV) with 2.2 MHz switching frequency and ±10% dithering to reduce EMI. Its internal architecture includes two independent charge pumps (VCP1, VCP2) enabling high-side N-FET gate drive across full input range (3.8–36 V), and dual bandgap references-one for regulation, one for fault checking-to meet ASIL D SEooC requirements.
Control and monitoring are handled via a dedicated SPI interface supporting register read/write, fault status reporting, watchdog configuration (Q&A + Window), and individual LDO enable/disable. The device features logic-level (ENB) and high-voltage ignition (ENBAT) enables, NPOR and FFn diagnostic outputs, and comprehensive protection including UV/OV on all rails, thermal shutdown at 165°C, and foldback current limiting on all LDOs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8 V to 36 V operating; 40 V absolute max - supports full automotive battery transient profile including load dump and cold crank. |
| Pre-regulator Output | VREG = 5.35 V ±100 mV at 1.2 A - supplies all downstream LDOs and bias circuitry with tight regulation and hiccup-mode OCP. |
| VUC Output | Selectable 3.3 V or 5.0 V ±100 mV at 350 mA - configured by VUCSEL pin; used for MCU core supply with foldback short-circuit protection. |
| V5P1/V5P2 Outputs | 120 mA tracking LDOs with ±25 mV tracking error at 5 V and ±0.66% at 3.3 V - provide short-to-battery protected power for remote sensors. |
| Gate Drivers | Four independent floating drivers (GU/GV/GW/GVBB) with integrated charge pumps - support high-phase-slew-rate N-FET control up to 36 V battery voltage. |
| Safety Certification | ASIL D SEooC compliant per ISO 26262; AEC-Q100 qualified - validated for use in EPS, ABS, and other safety-critical automotive ECUs. |
| Package | 38-pin eTSSOP (LV suffix) with exposed thermal pad - 1.2 mm max height, RθJA = 30 °C/W, optimized for underhood thermal performance. |
Pinout & Package
ARG82801KLVATR-1 is housed in a 38-lead eTSSOP package (suffix "LV") with an exposed thermal pad for enhanced power dissipation in high-temperature underhood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 34–38 | Charge pump capacitor connections (VCP1, VCP2, CP1C1/C2, CP2C1/C2) | Interface points for external ceramic capacitors enabling high-side gate drive over full VIN range. |
| 3, 33 | VIN and PGND | Main power input and power ground - handle up to 36 V and high pulsed currents during motor phase switching. |
| 6, 10 | ENB and ENBAT | Logic-level (3.3/5 V) and high-voltage (−13 to 40 V) enable inputs - support microcontroller sequencing and ignition-key control. |
| 11–12, 13–14, 15–16, 17–18 | GVBB/SVBB, GW/SW, GV/SV, GU/SU | Floating gate driver pairs - independently control external N-FETs for battery isolation or 3-phase BLDC motor phases. |
| 19–20, 29–30 | V5P1, V5P2, V5C, VUC | Protected LDO outputs - V5P1/V5P2 track VUC voltage; all include short-to-battery, foldback, UV/OV, and thermal protection. |
| 21–24 | SCK, STRn, SDO, SDI | Full-duplex SPI interface - enables real-time fault reporting, watchdog control, and per-rail enable/disable via 16-bit register map. |
| 8–9 | NPOR and FFn | Open-drain diagnostic outputs - NPOR signals power-on-reset status; FFn asserts on any latched fault (thermal, OV, UV, OCP). |
Key Features
| Feature | Design Value |
|---|---|
| ASIL D Safety Architecture | Dual independent bandgaps, startup self-test (BIST), and fault-isolated SPI reporting enable compliance with ISO 26262 SEooC requirements. |
| Buck/Buck-Boost Pre-regulator | 2.2 MHz operation with frequency dithering and controlled slew rates reduces EMI/EMC emissions without external filtering. |
| Floating Gate Drivers | Four isolated drivers with integrated charge pumps eliminate need for external bootstrap circuits and support >100 V/ns phase slew rates. |
| Tracking LDOs with Short-to-Battery Protection | V5P1/V5P2 maintain precise ratio to VUC and survive direct short to battery - critical for sensor power in harsh wiring environments. |
| Configurable Watchdog System | Independent Q&A and Window Watchdog timers activated via secure SPI commands - prevent system lockup in safety-critical motor control loops. |
Applications
| Electronic Power Steering (EPS) | Advanced Braking Systems (ABS) |
|---|---|
Use Scenario: Powers MCU, torque sensor, CAN transceiver, and 3-phase gate drivers in electric power steering ECU mounted near engine compartment. IC Role / Device Role / Timing Role: Central PMIC providing sequenced, fault-monitored power to safety-critical subsystems with ASIL D compliance. Use Value: Integrated charge pump drivers eliminate external high-side gate drive components; tracking LDOs ensure sensor bias stability during battery transients. |
Use Scenario: Supplies ABS controller MCU, wheel speed sensors, solenoid drivers, and CAN FD interface in brake module exposed to extreme temperature cycling. IC Role / Device Role / Timing Role: Single-chip power solution delivering regulated rails and isolated gate drive with diagnostic feedback for ISO 26262-compliant braking functions. Use Value: Dual bandgap fault detection and NPOR/FFn signaling enable rapid fault containment; wide VIN range handles stop-start battery fluctuations. |
| Engine Control Unit (ECU) | Electric Turbocharger Actuator |
Use Scenario: Provides primary power to engine control MCU, knock sensors, oxygen sensors, and injector drivers in high-temperature underhood location. IC Role / Device Role / Timing Role: High-integration PMIC replacing discrete regulators and gate drivers while maintaining functional safety integrity. Use Value: V5P1/V5P2 short-to-battery protection prevents sensor failure due to harness chafing; thermal shutdown at 165°C ensures reliability at peak underhood temps. |
Use Scenario: Powers turbine position controller MCU, Hall-effect sensors, and high-current MOSFET half-bridge drivers in compact turbo actuator housing. IC Role / Device Role / Timing Role: Combines pre-regulation, precision LDOs, and floating gate drivers in space-constrained module requiring minimal external components. Use Value: 2.2 MHz buck-boost pre-regulator minimizes inductor size; SPI-controlled rail enable/disable supports dynamic power gating during idle states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20420ATPA/VY+ | Single 3.3 V/5 V selectable LDO (300 mA); no gate drivers; uses I²C instead of SPI; ASIL B rated. | Lacks integrated gate drivers and ASIL D certification - suitable only for non-safety-critical MCU power, not motor control. | Choose when gate drive integration and ASIL D are unnecessary and I²C interface is preferred. |
| TPS65381A-Q1 | Three LDOs (not tracking), no gate drivers, 1.2 MHz pre-regulator, single watchdog timer, RθJA = 42 °C/W. | Lower integration density and thermal performance; lacks short-to-battery protection on sensor LDOs. | Consider for cost-sensitive ASIL B designs where gate drive and sensor protection are implemented externally. |
Compared with MAX20420ATPA/VY+ and TPS65381A-Q1, the ARG82801KLVATR-1 uniquely combines ASIL D compliance, four-channel floating gate drivers, and short-to-battery protected tracking LDOs - enabling single-chip power and isolation control in high-integrity motor systems without external protection circuitry.
Availability
ARG82801KLVATR-1 is available at Aetrix Electronics and suitable for electronic power steering (EPS), advanced braking systems (ABS), and engine control units (ECU) requiring stable component supply across extended automotive temperature and lifetime requirements.
Supply support for ARG82801KLVATR-1 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 designer and manufacturer of high-performance power ICs and magnetic sensors for automotive and industrial applications.
The ARG82801KLVATR-1 belongs to Allegro's safety-certified PMIC product line, engineered specifically for ASIL D automotive control modules requiring integrated power regulation, diagnostics, and high-current gate drive in underhood environments.
FAQ
What is the input voltage range supported by the ARG82801KLVATR-1?
The ARG82801KLVATR-1 supports an operating input voltage range of 3.8 V to 36 V, with an absolute maximum rating of 40 V. This range accommodates automotive battery conditions including cold-crank (down to ~3.8 V) and load-dump transients (up to 40 V), making it suitable for underhood applications where voltage stability is challenged by engine start-stop cycles and alternator regulation.
How does the ARG82801KLVATR-1 achieve ASIL D compliance?
The ARG82801KLVATR-1 achieves ASIL D compliance through dual independent bandgap references (one for regulation, one for fault checking), built-in startup self-test (BIST), undervoltage/overvoltage detect self-tests, and fault-isolated SPI reporting. These features are documented in its ISO 26262 SEooC safety manual and validated per AEC-Q100 Grade 0 qualification, enabling its use in safety-critical EPS and ABS systems without additional hardware redundancy.
Can the VUC output voltage be changed dynamically during operation?
No - the VUC output voltage (3.3 V or 5.0 V) is latched at startup based on the state of the VUCSEL pin and cannot be changed dynamically during operation. VUCSEL must be tied high (to VCC) for 5.0 V or low (to GND) for 3.3 V before power-up; the selected voltage remains fixed throughout device operation, ensuring deterministic MCU core supply behavior in safety-critical firmware execution.
What protection features are included for the V5P1 and V5P2 regulators?
The V5P1 and V5P2 regulators in the ARG82801KLVATR-1 include foldback short-circuit protection, short-to-battery protection (surviving direct connection to 12 V/24 V battery), undervoltage lockout (UVLO), overvoltage protection (OVP), and thermal shutdown. Their tracking behavior to VUC ensures consistent sensor bias even during MCU voltage scaling, and their ±25 mV tracking accuracy at 5 V supports precision analog sensor interfaces.
Does the ARG82801KLVATR-1 require external components for gate driver operation?
Yes - the ARG82801KLVATR-1 requires four external ceramic capacitors (two per charge pump: CP1C1/CP1C2 and CP2C1/CP2C2) to enable its floating gate drivers. These capacitors form the charge pump reservoirs needed to sustain high-side N-FET gate voltage above battery potential. No external bootstrap diodes or high-voltage level shifters are required, but proper layout and capacitor selection per the datasheet (e.g., 0.22 µF X7R 16 V) is essential for reliable phase-switching performance.
ARG82801KLVATR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (1) or Step-Down/Step-Up (Buck/Boost) (1), Linear (LDO) (4)
- Number of Outputs:
- 9
- Frequency - Switching:
- 2.2MHz
- Voltage/Current - Output 1:
- 5.35V/1.2A
- Voltage/Current - Output 2:
- 3.3V, 5V/350mA
- Voltage/Current - Output 3:
- 5V/115mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 3.8V ~ 36V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-eTSSOP
ARG82801KLVATR-1 FAQ
1.How can I place an order for ARG82801KLVATR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ARG82801KLVATR-1 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 ARG82801KLVATR-1 reliable?
The price and inventory of ARG82801KLVATR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ARG82801KLVATR-1 is usually 5 days.
3.What payment methods are accepted for ARG82801KLVATR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ARG82801KLVATR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ARG82801KLVATR-1?
ARG82801KLVATR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ARG82801KLVATR-1 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 ARG82801KLVATR-1?
For technical support, including ARG82801KLVATR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ARG82801KLVATR-1 requirements.
6.How does Aetrix verify that ARG82801KLVATR-1 is sourced from the original manufacturer or authorized distributors?
All ARG82801KLVATR-1 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 ARG82801KLVATR-1 meets industry standards.
7.What is the process for return or replacement of ARG82801KLVATR-1?
All ARG82801KLVATR-1 units undergo pre-shipment inspection (PSI). If there is an issue with ARG82801KLVATR-1, 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 ARG82801KLVATR-1 part is unused and in its original packaging.
Return procedure for ARG82801KLVATR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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