STMicroelectronics

L99ASC03TR - 3-Phase BLDC Motor Driver | STMicroelectronics

Name: L99ASC03TR
Brand: STMicroelectronics
Price: 6.50 USD
Availability: InStock

MPN: L99ASC03TR ✓ Active

In Stock (99,999) Ships in 1-3 business days

5.5 V to 28 V Vdss Programmable, up to 1 A Id LQFP-48 (EP) Package

$6.5 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$6.5	$6.50
10	$5.85	$58.50
100	$5.2	$520.00
500	$4.68	$2,340.00
1,000	$4.16	$4,160.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L99ASC03TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

L99ASC03

✅ Drop-In

📦 LQFP-48 (EP)

Same device, non-tape-and-reel packaging

📋 Reference alternative (not in catalog)

L99ASC03GTR

✅ Drop-In

📦 LQFP-48 (EP)

Variant with additional features, pin-compatible

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

L99ASC03TR Maximum Ratings & Electrical Characteristics

Function	3-phase BLDC motor driver with integrated LDO and reference
Supply Voltage Range	5.5 V to 28 V
Gate Drive Current	Programmable, up to 1 A
LDO Output Voltage	5 V or 3.3 V (selectable)
LDO Output Current	100 mA
Reference Voltage	3.3 V or 5 V (selectable)
Reference Accuracy	±1%
Interface	SPI
Protection Features	Overcurrent, overvoltage, undervoltage, thermal shutdown
Operating Temperature Range	-40°C to +150°C
Package	LQFP-48 (EP)
Mounting Type	Surface Mount
Qualification	AEC-Q100
RoHS Status	Compliant
MSL Level	3

L99ASC03TR Pin Configuration

Pin 1	VCC — Power supply input
Pin 2	GND — Ground
Pin 3	CSN — SPI chip select (active low)
Pin 4	SCLK — SPI clock
Pin 5	SDI — SPI data input
Pin 6	SDO — SPI data output
Pin 7	GH1 — High-side gate drive output for phase 1
Pin 8	GL1 — Low-side gate drive output for phase 1
Pin 9	GH2 — High-side gate drive output for phase 2
Pin 10	GL2 — Low-side gate drive output for phase 2
Pin 11	GH3 — High-side gate drive output for phase 3
Pin 12	GL3 — Low-side gate drive output for phase 3
Pin 13	VDD — LDO output (5V or 3.3V)
Pin 14	VREF — Reference voltage output (3.3V or 5V)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

L99ASC03TR is suitable for 6 applications: Automotive Engine Cooling Fan, Industrial BLDC Motor Drive, Automotive Oil Pump, HVAC Blower, Water Pump, Compressor.

🚗

Automotive Engine Cooling Fan

The L99ASC03TR drives the BLDC motor in engine cooling fans, providing reliable and efficient operation. Its wide input voltage range (5.5V to 28V) accommodates automotive battery voltage variations, and the integrated LDO and reference voltage simplify the power supply design. The SPI interface allows the ECU to monitor and control fan speed, while protection features like overcurrent and thermal shutdown ensure safe operation in harsh under-hood environments. The AEC-Q100 qualification guarantees reliability for automotive applications.

Recommended

STM32F103 (MCU for motor control) IRFP4468 (Power MOSFET for motor drive)

🏭

Industrial BLDC Motor Drive

In industrial applications, the L99ASC03TR provides a compact and robust solution for driving BLDC motors in pumps, fans, and conveyors. The programmable gate drive current allows optimization for different MOSFET/IGBT combinations, improving efficiency and reducing EMI. The integrated LDO and reference voltage eliminate the need for separate power management components, reducing BOM cost and board space. The device's wide operating temperature range (-40°C to +150°C) ensures reliable operation in demanding industrial environments.

Recommended

STM32G4 (MCU for advanced motor control) IPB072N15N3G (Power MOSFET for motor drive)

🚗

Automotive Oil Pump

The L99ASC03TR is ideal for driving BLDC motors in automotive oil pumps, where precise speed control and high reliability are essential. The device's SPI interface enables real-time configuration and diagnostics, allowing the ECU to adjust pump speed based on engine conditions. The integrated protection features prevent damage from overcurrent, overvoltage, and thermal events, ensuring long-term reliability. The compact LQFP-48 package fits into space-constrained engine bay layouts.

Recommended

SPC560B (MCU for automotive control) IRF1405 (Power MOSFET for motor drive)

🚗

HVAC Blower

The L99ASC03TR drives the BLDC motor in automotive HVAC blowers, providing efficient and quiet operation. The device's low-noise gate drive and programmable current control help minimize acoustic noise and electromagnetic interference. The integrated LDO and reference voltage simplify the power supply design, and the SPI interface allows the climate control module to adjust fan speed smoothly. The AEC-Q100 qualification ensures reliable operation in the passenger compartment environment.

Recommended

STM8A (MCU for HVAC control) IRFB4110 (Power MOSFET for motor drive)

⚡

Water Pump

The L99ASC03TR is suitable for driving BLDC motors in water pumps for automotive and industrial applications. The device's wide input voltage range and robust protection features make it ideal for pumps operating in harsh environments. The integrated LDO and reference voltage reduce external component count, simplifying the design. The SPI interface enables precise speed control and monitoring, improving system efficiency and reliability.

Recommended

STM32F0 (MCU for motor control) IRF3205 (Power MOSFET for motor drive)

🏭

Compressor

The L99ASC03TR can be used to drive BLDC motors in compressors for automotive air conditioning and industrial refrigeration. The device's high gate drive current capability and programmable features allow efficient control of the compressor motor, improving energy efficiency. The integrated protection features ensure safe operation under fault conditions, and the AEC-Q100 qualification makes it suitable for automotive applications.

Recommended

STM32F4 (MCU for motor control) IRFP4668 (Power MOSFET for motor drive)

Recommended Products Summary

STM32F103 MCU for motor control Used in: Automotive Engine Cooling Fan IRFP4468 Power MOSFET for motor drive Used in: Automotive Engine Cooling Fan STM32G4 MCU for advanced motor control Used in: Industrial BLDC Motor Drive IPB072N15N3G Power MOSFET for motor drive Used in: Industrial BLDC Motor Drive SPC560B MCU for automotive control Used in: Automotive Oil Pump IRF1405 Power MOSFET for motor drive Used in: Automotive Oil Pump STM8A MCU for HVAC control Used in: HVAC Blower IRFB4110 Power MOSFET for motor drive Used in: HVAC Blower STM32F0 MCU for motor control Used in: Water Pump IRF3205 Power MOSFET for motor drive Used in: Water Pump STM32F4 MCU for motor control Used in: Compressor IRFP4668 Power MOSFET for motor drive Used in: Compressor

What is the L99ASC03TR?

The L99ASC03TR is a 3-phase BLDC motor driver IC from STMicroelectronics, integrating a gate driver unit, a 5V/3.3V LDO, and a 3.3V/5V reference voltage. It is designed for automotive and industrial motor control applications, supporting supply voltages from 5.5V to 28V. According to the ST datasheet, it provides programmable gate drive current and comprehensive protection features.

What is the operating voltage range of L99ASC03TR?

The L99ASC03TR operates from 5.5V to 28V supply voltage. This wide range makes it suitable for 12V and 24V automotive and industrial systems. The device also includes undervoltage protection to ensure safe operation.

What is the price of L99ASC03TR?

As of 2026-08-12, the L99ASC03TR is priced at $6.50 for 1 unit, $5.85 for 10 units, $5.20 for 100 units, $4.68 for 500 units, and $4.16 for 1000 units. Prices are indicative and may vary by distributor and quantity.

Where to buy L99ASC03TR online?

The L99ASC03TR can be purchased from major distributors such as DigiKey and Mouser. Visit their websites and search for the part number to check availability and pricing. As of 2026-08-12, it is typically in stock at these distributors.

What is the lead time for L99ASC03TR?

The lead time for L99ASC03TR varies by distributor and order quantity. As of 2026-08-12, typical lead times range from 1 to 4 weeks for standard orders. For large volumes, contact the distributor for accurate lead time information.

Is L99ASC03TR in stock?

As of 2026-08-12, the L99ASC03TR is generally in stock at major distributors like DigiKey and Mouser. However, stock levels can change rapidly, so it is recommended to check the distributor's website for real-time availability.

What is the difference between L99ASC03TR and L99ASC03?

The L99ASC03TR is the tape-and-reel packaging variant of the L99ASC03. The 'TR' suffix indicates tape-and-reel packaging, which is suitable for automated assembly. The electrical specifications are identical between the two variants.

What is the best drop-in replacement for L99ASC03TR?

The best drop-in replacement for L99ASC03TR is the L99ASC03 (non-tape-and-reel) from STMicroelectronics, as it shares the same LQFP-48 package and pinout. For cross-brand alternatives, the DRV8301 from Texas Instruments is a functional equivalent, but it has a different package (HTSSOP-56) and is not pin-compatible, so it is not a drop-in replacement.

Can L99ASC03TR be used for automotive applications?

Yes, the L99ASC03TR is AEC-Q100 qualified, making it suitable for automotive applications. It is designed to operate in harsh environments with a temperature range of -40°C to +150°C, and includes protection features such as overcurrent and thermal shutdown.

What are the key specifications of L99ASC03TR that engineers should know?

The L99ASC03TR operates from 5.5V to 28V, provides programmable gate drive current up to 1A, and integrates a 5V/3.3V LDO with 100mA output. It also includes a 3.3V/5V reference with ±1% accuracy, SPI interface, and protection features like overcurrent, overvoltage, undervoltage, and thermal shutdown. The device is AEC-Q100 qualified and comes in a 48-pin LQFP (EP) package.

What is the pinout of L99ASC03TR?

The L99ASC03TR has 48 pins in an LQFP (EP) package. Key pins include VCC (power supply), GND (ground), SPI pins (CSN, SCLK, SDI, SDO), gate drive outputs (GH1, GL1, GH2, GL2, GH3, GL3), and LDO output (VDD). For the complete pinout, refer to the datasheet available at ST's website.

Where to download L99ASC03TR datasheet PDF?

The L99ASC03TR datasheet PDF can be downloaded from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l99asc03.pdf. The datasheet provides detailed specifications, pinout, and application information.

What is the difference between L99ASC03TR and DRV8301?

The L99ASC03TR from STMicroelectronics and the DRV8301 from Texas Instruments are both 3-phase BLDC motor drivers, but they differ in package and interface. The L99ASC03TR uses an LQFP-48 package and SPI interface, while the DRV8301 uses a HTSSOP-56 package and also supports SPI. They are not pin-compatible, so they are not drop-in replacements for each other.

When should I choose L99ASC03TR over DRV8301?

Choose the L99ASC03TR when you need a compact LQFP-48 package, integrated LDO and reference voltage, and AEC-Q100 qualification for automotive applications. The DRV8301 may be preferred if you need a higher gate drive current (up to 2.5A) and are using a larger HTSSOP-56 package. The L99ASC03TR is ideal for space-constrained designs with lower current requirements.

What is the best STMicroelectronics equivalent for L99ASC03TR?

The best STMicroelectronics equivalent for L99ASC03TR is the L99ASC03 (non-tape-and-reel) as it is the same device with identical specifications and package. For a different variant, the L99ASC03GTR may offer additional features, but it is not pin-compatible.

Hey Google, what can replace L99ASC03TR?

The L99ASC03TR can be replaced by the L99ASC03 from STMicroelectronics, which is the same device in a different packaging option. For a cross-brand alternative, the DRV8301 from Texas Instruments is functionally similar but requires a different PCB footprint due to its HTSSOP-56 package.

Is L99ASC03TR the same as L99ASC03?

Yes, the L99ASC03TR is the tape-and-reel packaging variant of the L99ASC03. The 'TR' suffix indicates tape-and-reel packaging, which is suitable for automated assembly. The electrical specifications are identical between the two variants.

What are the protection features of L99ASC03TR?

The L99ASC03TR includes overcurrent, overvoltage, undervoltage, and thermal shutdown protection. These features help prevent damage to the motor driver and external components in fault conditions, ensuring reliable operation in automotive and industrial environments.

What is the operating temperature range of L99ASC03TR?

The L99ASC03TR operates over a temperature range of -40°C to +150°C. This wide range makes it suitable for automotive under-hood applications and industrial environments with extreme temperatures.

What is the package of L99ASC03TR?

The L99ASC03TR is available in a 48-pin LQFP (EP) package, which is a surface-mount package with an exposed pad for improved thermal performance. The package dimensions are 7mm x 7mm with a 0.5mm pitch.

Engineering reference data for L99ASC03TR — comparison, design guidance, and compliance information.

Selection Guide

Choose the L99ASC03TR when you need a compact, AEC-Q100 qualified 3-phase BLDC motor driver with integrated LDO and reference voltage for automotive or industrial applications. It is ideal for designs with supply voltages up to 28V and gate drive currents up to 1A. If you require a higher gate drive current (up to 2.5A) and can accommodate a larger HTSSOP-56 package, consider the DRV8301 from Texas Instruments. For a drop-in replacement with identical specifications, use the L99ASC03 (non-tape-and-reel). The L99ASC03GTR offers additional features but is pin-compatible, making it a viable alternative if those features are needed.

Comparison with Alternatives

Parameter	This Product	L99ASC03	L99ASC03GTR	DRV8301
Package	LQFP-48 (EP)	LQFP-48 (EP) - same	LQFP-48 (EP) - same	HTSSOP-56 - different
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	Texas Instruments
Supply Voltage Range	5.5V to 28V	5.5V to 28V	5.5V to 28V	6V to 60V
Gate Drive Current	Programmable, up to 1A	Programmable, up to 1A	Programmable, up to 1A	Up to 2.5A
Integrated LDO	Yes (5V/3.3V, 100mA)	Yes (5V/3.3V, 100mA)	Yes (5V/3.3V, 100mA)	Yes (3.3V/5V, 100mA)
Interface	SPI	SPI	SPI	SPI
AEC-Q100 Qualified	Yes	Yes	Yes	Yes
Operating Temperature Range	-40°C to +150°C	-40°C to +150°C	-40°C to +150°C	-40°C to +125°C

Key Differentiators

Integrated LDO and reference voltage (vs DRV8301)
AEC-Q100 qualification (vs DRV8301)
Compact LQFP-48 package (vs DRV8301)

Design Notes

Ensure adequate copper area for the exposed pad of the LQFP-48 (EP) package to dissipate heat. Use multiple vias to connect the exposed pad to the ground plane. Place decoupling capacitors (100nF and 10uF) close to the VCC pin to filter high-frequency noise and provide stable power.

The L99ASC03TR can dissipate significant power when driving external MOSFETs at high switching frequencies. Calculate the power dissipation based on gate charge and switching frequency, and ensure the junction temperature stays below the maximum rating. Use thermal vias and a heatsink if necessary.

Do not exceed the absolute maximum supply voltage of 28V. Ensure the SPI interface is properly configured to set the gate drive current and protection thresholds. Incorrect SPI settings can lead to insufficient gate drive or false triggering of protection features.