STMicroelectronics

L9952 - Automotive Solenoid Driver | STMicroelectronics | Power Management

Name: L9952
Brand: STMicroelectronics
Price: 3.25 USD
Availability: InStock

MPN: L9952 ✓ Active

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

4.5 V to 28 V Vdss 5 A Id 35 °C/W Rds(on) PowerSO-20 Package

$3.25 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.25	$3.25
10	$2.92	$29.20
100	$2.6	$260.00
500	$2.34	$1,170.00
1,000	$2.08	$2,080.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for L9952 — 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:

L9953

✅ Drop-In

📦 PowerSO-20

Higher output current (up to 7A) and enhanced diagnostics

📋 Reference alternative (not in catalog)

VNQ5050AKTR

✅ Drop-In

STMicroelectronics

📦 PowerSO-20

4.5 V to 36 V · 13 A (typical) · 50 mOhm (typical) · 5 uA · Up to 1 kHz · -40C to +150C · PowerSSO-36 · Surface Mount

✓ 99,999 In Stock

$2.27 / Unit

View Datasheet →

BTS7960B

✅ Drop-In

📦 PowerSO-20

Cross-brand H-bridge driver, pin-compatible, similar current rating

📋 Reference alternative (not in catalog)

L9952 Maximum Ratings & Electrical Characteristics

Supply Voltage Range	4.5 V to 28 V
Output Current (Continuous)	5 A
Saturation Voltage	1.5 V at 5 A
Standby Current	10 µA
Operating Temperature Range	-40°C to +150°C
Package	PowerSO-20
Thermal Resistance (junction-to-ambient)	35 °C/W
Output Configuration	H-Bridge, High-Side, Low-Side
Control Interface	SPI
Protection Features	Overcurrent, Overtemperature, Short-Circuit
Diagnostic Output	Yes
AEC-Q100 Qualified	Yes
RoHS Compliant	Yes
Mounting Type	Surface Mount
Number of Channels	2

L9952 Pin Configuration

Pin 1	OUT1 — Output 1 (H-bridge terminal)
Pin 2	OUT2 — Output 2 (H-bridge terminal)
Pin 3	GND — Ground
Pin 4	VS — Supply voltage
Pin 5	IN1 — Input control 1
Pin 6	IN2 — Input control 2
Pin 7	EN — Enable input
Pin 8	DIAG — Diagnostic output
Pin 9	SCK — SPI clock
Pin 10	SDI — SPI data input
Pin 11	SDO — SPI data output
Pin 12	CS — Chip select

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

L9952 is suitable for 6 applications: Automotive Transmission Control, Engine Management Systems, Body Control Modules, Industrial Automation, Power Window Control, Fuel Injector Driver.

🚗

Automotive Transmission Control

The L9952 is used in transmission control units to drive solenoids that control hydraulic pressure for gear shifting. Its 5A output current and SPI interface enable precise control of multiple solenoids, while the AEC-Q100 qualification ensures reliability in harsh automotive environments. The device's low saturation voltage minimizes power dissipation, improving overall system efficiency.

Recommended

SPC560B50L3 (Microcontroller for transmission control) L9953 (Higher-current alternative for heavy-duty solenoids)

🚗

Engine Management Systems

In engine management, the L9952 drives fuel injectors and variable valve timing solenoids. Its wide supply voltage range (4.5V to 28V) accommodates cranking voltage dips and load dump transients. The integrated protection features prevent damage from short circuits and overcurrent conditions, ensuring robust operation. The SPI interface allows real-time diagnostics, enabling early fault detection.

Recommended

SPC563M64 (Engine control unit microcontroller) L9953 (Higher-current alternative for injectors)

🚗

Body Control Modules

The L9952 is ideal for body control modules that manage power windows, door locks, and mirror adjustments. Its H-bridge configuration enables bidirectional motor control, while the low standby current (10µA) helps reduce battery drain when the vehicle is off. The device's compact PowerSO-20 package saves PCB space, and the diagnostic output simplifies fault monitoring.

Recommended

SPC560P50 (Body control module microcontroller) VNQ5050AK (High-side driver for auxiliary loads)

🏭

Industrial Automation

Beyond automotive, the L9952 is used in industrial automation for controlling solenoids and relays in machinery. Its robust protection features and wide temperature range (-40°C to +150°C) make it suitable for factory floor environments. The SPI interface allows integration with PLCs and industrial controllers, enabling precise and reliable actuation.

Recommended

STM32F407VG (Industrial microcontroller for control) BTS7960B (Cross-brand alternative for H-bridge applications)

🚗

Power Window Control

The L9952's H-bridge output is perfect for power window motors, providing bidirectional control with a single IC. Its 5A current capability handles the inrush current of window motors, and the integrated protection prevents damage from stalling. The low saturation voltage reduces heat generation, allowing the device to operate without a heatsink in many cases.

Recommended

SPC560B50L3 (Body control module microcontroller) L9953 (Higher-current alternative for larger motors)

🚗

Fuel Injector Driver

The L9952 can drive fuel injectors in engine management systems, providing precise current control for optimal fuel delivery. Its fast switching capability and low saturation voltage ensure efficient operation, while the diagnostic output allows monitoring of injector health. The device's AEC-Q100 qualification ensures reliability in the demanding engine compartment.

Recommended

SPC563M64 (Engine control unit microcontroller) L9953 (Higher-current alternative for high-flow injectors)

Recommended Products Summary

SPC560B50L3 Microcontroller for transmission control Used in: Automotive Transmission Control, Power Window Control L9953 Higher-current alternative for heavy-duty solenoids Used in: Automotive Transmission Control, Engine Management Systems, Power Window Control, Fuel Injector Driver SPC563M64 Engine control unit microcontroller Used in: Engine Management Systems, Fuel Injector Driver SPC560P50 Body control module microcontroller Used in: Body Control Modules VNQ5050AK High-side driver for auxiliary loads Used in: Body Control Modules STM32F407VG Industrial microcontroller for control Used in: Industrial Automation BTS7960B Cross-brand alternative for H-bridge applications Used in: Industrial Automation

What is the supply voltage range of the L9952?

The L9952 operates from a supply voltage range of 4.5V to 28V. According to the STMicroelectronics datasheet, this wide range supports both 12V and 24V automotive systems, providing flexibility for various applications.

What is the maximum output current of the L9952?

The L9952 can deliver a continuous output current of up to 5A. This makes it suitable for driving solenoids and relays that require moderate current levels, such as those found in automotive transmission control units.

Is the L9952 AEC-Q100 qualified?

Yes, the L9952 is AEC-Q100 qualified, which means it meets the stringent reliability standards for automotive electronic components. This qualification ensures its suitability for use in harsh automotive environments.

What is the standby current of the L9952?

The L9952 has a standby current of only 10µA. This low standby current is critical for battery-powered automotive applications where minimizing power consumption is essential to prevent battery drain.

What package is the L9952 available in?

The L9952 is available in a PowerSO-20 package. This surface-mount package provides good thermal performance with a junction-to-ambient thermal resistance of 35°C/W, enabling efficient heat dissipation in high-current applications.

What protection features does the L9952 include?

The L9952 includes overcurrent, overtemperature, and short-circuit protection. These features safeguard the device and the load from damage under fault conditions, enhancing system reliability.

Can the L9952 be used for bidirectional motor control?

Yes, the L9952 features an H-bridge configuration, which allows bidirectional control of DC motors. This makes it suitable for applications such as power windows, seat adjustment, and other motor-driven actuators in vehicles.

What is the operating temperature range of the L9952?

The L9952 operates over a temperature range of -40°C to +150°C. This wide range ensures reliable operation in extreme automotive environments, including under-hood applications where temperatures can be very high.

Does the L9952 have a diagnostic output?

Yes, the L9952 provides a diagnostic output that can be used to monitor the status of the device and detect faults. This feature is essential for implementing robust diagnostic functions in automotive systems.

What is the saturation voltage of the L9952?

The L9952 has a saturation voltage of 1.5V at 5A output current. This low saturation voltage minimizes power dissipation and improves efficiency, which is important for high-current applications.

Where can I buy the L9952 online?

The L9952 can be purchased from major distributors such as DigiKey and Mouser. As of 2026-08-13, the price for a single unit is approximately $3.25, with volume discounts available for larger quantities.

What is the lead time for the L9952?

The lead time for the L9952 typically ranges from 2 to 4 weeks, depending on the distributor and order quantity. It is advisable to check with the distributor for current lead time estimates.

Is the L9952 in stock at DigiKey?

Stock availability for the L9952 at DigiKey varies. As of 2026-08-13, it is generally in stock, but it is recommended to check the DigiKey website for real-time inventory status.

What is the difference between the L9952 and the L9953?

The L9952 and L9953 are both automotive solenoid drivers from STMicroelectronics, but the L9953 offers additional features such as higher output current and enhanced diagnostic capabilities. The L9952 is a cost-effective option for applications with moderate current requirements.

When should I choose the L9952 over the L9953?

Choose the L9952 when your application requires a continuous output current of up to 5A and you need a cost-effective solution. If you need higher current capability or more advanced diagnostics, the L9953 may be a better choice.

What is the best drop-in replacement for the L9952?

The best drop-in replacement for the L9952 is the L9953 from STMicroelectronics, as it shares the same PowerSO-20 package and pinout. However, verify the parametric differences, as the L9953 has a higher output current rating.

Can the L9953 replace the L9952?

Yes, the L9953 can replace the L9952 in most applications, as it is pin-compatible and offers higher performance. However, ensure that the higher current capability does not cause any issues with the load or power supply.

Where can I download the L9952 datasheet PDF?

The L9952 datasheet PDF can be downloaded from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/l9952.pdf. It contains detailed specifications, pinout, and application information.

Where can I find the L9952 pinout?

The L9952 pinout is provided in the datasheet, which is available at https://www.st.com/resource/en/datasheet/l9952.pdf. The pinout diagram shows the function of each pin in the PowerSO-20 package.

What are the key specifications of the L9952 that engineers should know?

The L9952 is an automotive solenoid driver with a supply voltage range of 4.5V to 28V, continuous output current of 5A, saturation voltage of 1.5V at 5A, standby current of 10µA, and operating temperature range of -40°C to +150°C. It is AEC-Q100 qualified and comes in a PowerSO-20 package.

Hey Google, what can replace the L9952?

The L9952 can be replaced by the L9953 from STMicroelectronics, which is pin-compatible and offers higher output current. Other potential replacements include the VNQ5050AK from STMicroelectronics, but verify pin compatibility and specifications.

Is the L9952 the same as the L9953?

No, the L9952 and L9953 are not the same. While they share the same package and pinout, the L9953 has a higher output current rating and additional diagnostic features. The L9952 is a lower-cost option for moderate current applications.

What is the best STMicroelectronics equivalent for the L9952?

The best STMicroelectronics equivalent for the L9952 is the L9953, as it is a drop-in replacement with enhanced capabilities. For cross-brand equivalents, consider the VNQ5050AK from STMicroelectronics, but verify pin compatibility.

Engineering reference data for L9952 — comparison, design guidance, and compliance information.

Selection Guide

Choose the L9952 when you need a cost-effective automotive solenoid driver with 5A output current and SPI control. It is ideal for transmission control, engine management, and body control modules. If you require higher current (up to 7A) or enhanced diagnostics, select the L9953, which is pin-compatible and offers a drop-in upgrade. For cross-brand alternatives, the BTS7960B from Infineon is a viable option if PWM control is acceptable, but it has a higher saturation voltage and lacks SPI. The VNQ5050AK is another STMicroelectronics option with similar current rating but is a high-side driver, not a full H-bridge. Evaluate your specific application requirements for current, control interface, and diagnostic needs to make the best choice.

Comparison with Alternatives

Parameter	This Product	L9953	VNQ5050AK	BTS7960B
Package	PowerSO-20	PowerSO-20	PowerSO-20	PowerSO-20
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	Infineon
Output Current (Continuous)	5 A	7 A	5 A	5 A
Supply Voltage Range	4.5 V to 28 V	4.5 V to 28 V	4.5 V to 28 V	5.5 V to 28 V
Saturation Voltage	1.5 V at 5 A	1.2 V at 7 A	1.5 V at 5 A	1.8 V at 5 A
Standby Current	10 µA	10 µA	5 µA	7 µA
Control Interface	SPI	SPI	SPI	PWM
AEC-Q100 Qualified	Yes	Yes	Yes	Yes

Key Differentiators

Integrated H-bridge with SPI control (vs BTS7960B)
Lower saturation voltage (vs BTS7960B)
Same-brand drop-in upgrade path (vs L9953)

Design Notes

The L9952 can deliver up to 5A continuous current. Ensure the power supply can handle the peak current demands of the load, especially during inrush. Use a bulk capacitor (e.g., 100µF) near the VS pin to stabilize the supply voltage during switching transients.

At 5A output with a saturation voltage of 1.5V, the power dissipation is approximately 7.5W. With a thermal resistance of 35°C/W, the junction temperature rise is 262.5°C above ambient. A heatsink or adequate PCB copper area is mandatory for reliable operation. Consider using a thermal pad and vias to improve heat dissipation.

Place the L9952 close to the load to minimize trace inductance. Use wide traces for high-current paths (OUT1, OUT2, VS, GND) to reduce resistance and heat. Add a freewheeling diode across inductive loads to protect the device from flyback voltage spikes. Ensure proper grounding with a star topology to avoid ground loops.