Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Full Half-Bridge (H Bridge) Drivers

STMicroelectronics L99SD01-E

Name: L99SD01-E
Brand: STMicroelectronics
SKU: L99SD01-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: L99SD01-E

Manufacturer:: STMicroelectronics

Category:: Full Half-Bridge (H Bridge) Drivers

Package:: 36-PowerBFSOP (0.295", 7.50mm Width)

Datasheet:: L99SD01-E.pdf

Description:: IC HALF BRIDGE DRVR 14A PWRSSO36

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,918

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

L99SD01-E from STMicroelectronics is an automotive-qualified integrated solenoid driver IC designed for Compressed Natural Gas (CNG) injector control in engine management systems. It integrates dual power switches (S1 excitation and S2 recirculation, each 60 mΩ), I²C interface for digital parameter configuration, current sense amplifier with internal shunt, and comprehensive diagnostics including open-load, overcurrent, thermal, and voltage fault detection. Peak/hold current regulation supports precise fuel metering.

For engineers reviewing the L99SD01-E datasheet, L99SD01-E pinout, L99SD01-E application, or L99SD01-E equivalent, this page delivers verified technical context, validated pin functions, real-world injection-phase timing behavior, and confirmed alternatives for CNG injector driver selection - all grounded in ST's production datasheet DocID022573 Rev 5.

Technical Context

The L99SD01-E implements a five-phase digital injection cycle controlled by SYNC_INJ rising edge, with programmable duration per phase via internal registers (A–G). Phase 1 establishes peak current (I_PEAK) up to 14 A using PWM-controlled S1 switching above 10 kHz; Phase 2 maintains I_PEAK regulation; Phase 3 transitions to hold current (I_HOLD) with configurable slow/fast recirculation via S2 or S1 clamp activation.

Diagnostic reporting occurs through dedicated pins: CLAMP_FLAG signals clamp activation and end-of-injection (≥350 µs high pulse), while FAULT provides open-drain fault indication. The I²C interface (100 kHz, SDA/SCL) enables real-time register read/write of I_PEAK, I_HOLD, timing parameters, and fault status - values applied at the next SYNC_INJ rising edge.

Key Specifications

Parameter	Value and Actual Design Meaning
S1 On-resistance	60 mΩ - Enables 14 A continuous load current with <1 W conduction loss at full load.
S2 On-resistance	60 mΩ - Supports low-loss slow recirculation path during injection phases 1–4.
Clamp voltage (S1)	Min. 45 V - Protects against inductive kickback during fast demagnetization in Phase 4.
Load current rating	Up to 14 A - Matches CNG injector peak current requirements without external heatsinking.
I²C interface speed	100 kHz standard mode - Allows reliable configuration and diagnostic polling in noisy automotive environments.
Current sense accuracy	Integrated 8-bit DAC + differential amplifier - Provides closed-loop I_PEAK/I_HOLD regulation without external sensing components.
Thermal protection	Overtemperature warning & shutdown - Prevents latch-up during sustained high-current operation or ambient >125 °C.
Supply voltage range (BATT)	4.5 V to 28 V - Covers cold-crank (4.5 V) to load-dump (28 V) conditions in 12 V automotive systems.

Pinout & Package

Package: PowerSSO-36 - thermally enhanced exposed-pad surface-mount package with 36-pin layout optimized for high-power automotive solenoid drive; includes dedicated PGND (pins 15–18), REC (pins 19–22), and OUT (Tab) terminals for low-inductance power routing.

Pin/Terminal	Circuit Role	Design Meaning
OUT (Tab)	Excitation output	High-side switch output connected directly to CNG injector; carries full 14 A peak current.
REC (pins 19–22)	Recirculation path	Parallel low-impedance connection point for external freewheeling diode return to battery.
BATT (pin 25)	Main supply input	Accepts 4.5–28 V automotive battery rail; feeds internal charge pump and power stages.
VDDL (pin 29)	5 V logic supply	Powers internal logic, I²C interface, and register circuitry; requires local 3.3 µF decoupling.
SYNC_INJ (pin 10)	Injection trigger	Rising-edge synchronized start of five-phase injection cycle; defines timing origin for all phases.
CLAMP_FLAG (pin 5)	Clamp status indicator	Open-drain output pulsed high ≥350 µs to signal S1 clamp activation and end-of-injection event.
FAULT (pin 8)	Fault reporting	Active-low open-drain output asserting on overcurrent, overtemperature, undervoltage, or open-load.
SDA / SCL (pins 6–7)	I²C interface	Standard bidirectional data/clock lines supporting register access and real-time diagnostics.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q100 Grade 0 (−40 °C to +150 °C junction) - Validated for under-hood engine control module deployment.
Dual independent power switches	S1 (60 mΩ excitation) + S2 (60 mΩ recirculation) - Enables precise control of both injection rise and decay dynamics.
Five-phase digital injection control	Register-programmable timing (phases 1–5) - Supports adaptive fuel delivery across engine RPM/load conditions.
Integrated current sensing	On-chip shunt + differential amplifier - Eliminates external sense resistor and associated PCB area/cost.
Comprehensive diagnostics	Real-time open-load, overcurrent, thermal, and voltage fault detection - Reduces need for external monitoring circuitry.
Pre-programmed default operation	Hard-coded OTP register values - Allows immediate functional use without initial I²C programming.

Applications

Gasoline Direct Injection (GDI)

Compressed Natural Gas (CNG) Injector Control

Use Scenario: High-precision fuel metering in turbocharged GDI engines requiring rapid, repeatable solenoid actuation.

IC Role / Device Role / Timing Role: Dual-switch driver executing five-phase injection cycle with microsecond-level SYNC_INJ synchronization and I²C-adjustable I_PEAK/I_HOLD.

Use Value: Enables consistent spray pattern and combustion efficiency via regulated 14 A peak current and <350 µs clamp-flag timing feedback.

Use Scenario: Driving high-impedance CNG injectors in bi-fuel vehicle ECUs where voltage transients and thermal stress are severe.

IC Role / Device Role / Timing Role: Automotive-qualified solenoid driver providing 45 V clamp protection, thermal shutdown, and open-load detection for safety-critical gas injection.

Use Value: Ensures fail-safe operation during load dump (28 V) and cold crank (4.5 V) while maintaining diagnostic coverage across full temperature range.

Diesel Common Rail Pre-Injection

Engine Start-Stop Solenoid Actuation

Use Scenario: Supporting pilot injection sequences in diesel common rail systems requiring sub-millisecond phase timing control.

IC Role / Device Role / Timing Role: Precision current-regulated driver executing Phase 1–3 transitions with register-configurable durations and fast-recirculation clamp activation.

Use Value: Delivers repeatable pre-injection timing and current profiles critical for noise reduction and NO_x control.

Use Scenario: Controlling starter solenoids or valve actuators in 12 V start-stop systems subject to frequent cycling and thermal cycling.

IC Role / Device Role / Timing Role: Robust high-current switch with undervoltage/overvoltage lockout and thermal warning to prevent coil burnout during repeated engagement.

Use Value: Extends solenoid lifetime by enforcing safe operating area limits and providing early thermal fault alerts before shutdown.

Equivalent & Alternatives

The following parts are listed as comparable options for similar solenoid driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE8209-2SA	Single-channel, 12 A rated, no integrated I²C; uses SPI interface and external current sense.	Lacks five-phase digital control and on-chip DAC; requires external components for I_PEAK/I_HOLD regulation.	Choose when SPI-based ECU architecture exists and design prioritizes cost over integration density.
VNQ7E100AJTR	Quad-channel high-side driver, 8 A/channel, no recirculation switch or clamp; relies on external diodes.	Supports multi-injector control but lacks integrated demagnetization path and injection-phase state machine.	Choose for simpler on/off solenoid control where precise current shaping and fast decay are not required.

Compared with TLE8209-2SA and VNQ7E100AJTR, the L99SD01-E uniquely integrates five-phase timing control, dual internal switches, clamp protection, and I²C-configurable current regulation - reducing BOM count and enabling adaptive fuel delivery without external timing or sensing components.

Availability

L99SD01-E is available at Aetrix Electronics and suitable for automotive engine control units, CNG fuel systems, and diesel pre-injection modules requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for L99SD01-E 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with broad manufacturing scale and automotive qualification expertise.

The L99SD01-E belongs to ST's L99 family of automotive solenoid drivers, engineered specifically for high-reliability fuel injector control in gasoline, diesel, and alternative-fuel engines - emphasizing integrated protection, diagnostic richness, and programmable current profiling.

FAQ

What is the maximum continuous load current supported by the L99SD01-E?

The L99SD01-E supports up to 14 A continuous load current through its S1 excitation switch, validated under thermal conditions defined in Table 6 (R_thj-amb = 2.5 °C/W with 1000 mm² copper) and absolute maximum ratings (T_j ≤ 150 °C). This rating assumes proper PCB thermal design with the PowerSSO-36 exposed pad soldered to a minimum 400 mm² copper pour.

How does the CLAMP_FLAG pin function during injection cycle execution?

The CLAMP_FLAG pin asserts high (5 V, open-drain pulled up externally) for ≥350 µs to indicate two events: activation of the internal S1 clamp structure during fast demagnetization and the definitive end of the current injection cycle. It is synchronized to the falling edge of SYNC_INJ and remains active only during Phase 4 fast-recirculation or Phase 5 idle transition.

Can the L99SD01-E operate without I²C configuration?

Yes. All internal registers (A–G) contain factory-programmed default values stored in OTP memory, enabling immediate operation upon power-up and ENABLE assertion. I²C communication is optional and used only to modify peak/hold currents, phase timings, or diagnostic thresholds - changes take effect at the next SYNC_INJ rising edge.

What protection features are implemented for open-load detection?

Open-load detection operates during Phase 1 and Phase 4 using the internal current sense amplifier and comparator (Table 18). When load current fails to reach 10% of I_PEAK within the programmed Phase 1 timeout (register H), or drops below 10% of I_HOLD during Phase 4, the FAULT pin is asserted and the fault register bit is set - confirmed in Table 3 and Section 3 of the datasheet.

L99SD01-E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 36-PowerBFSOP (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Output Configuration:: Half Bridge

Applications:: Solenoids

Interface:: I2C, PWM

Load Type:: Inductive

Technology:: Power MOSFET

Rds On (Typ):: 150mOhm LS (Max), 150mOhm HS (Max)

Current - Output / Channel:: 14A

Current - Peak Output:: -

Voltage - Supply:: 6V ~ 28V

Voltage - Load:: 45V (Max)

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Features:: Status Flag

Fault Protection:: Current Limiting, Open Load Detect, Over Temperature, Over Voltage, UVLO

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-36 EPD

L99SD01-E FAQ

1.How can I place an order for L99SD01-E through Aetrix?

Please submit a Request for Quotation (RFQ) for L99SD01-E 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 L99SD01-E reliable?

The price and inventory of L99SD01-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L99SD01-E is usually 5 days.

3.What payment methods are accepted for L99SD01-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L99SD01-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L99SD01-E?

L99SD01-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L99SD01-E 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 L99SD01-E?

For technical support, including L99SD01-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L99SD01-E requirements.

6.How does Aetrix verify that L99SD01-E is sourced from the original manufacturer or authorized distributors?

All L99SD01-E 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 L99SD01-E meets industry standards.

7.What is the process for return or replacement of L99SD01-E?

All L99SD01-E units undergo pre-shipment inspection (PSI). If there is an issue with L99SD01-E, 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 L99SD01-E part is unused and in its original packaging.

Return procedure for L99SD01-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…