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) > Voltage Regulators - Linear + Switching

STMicroelectronics L9305EP

Name: L9305EP
Brand: STMicroelectronics
SKU: L9305EP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: L9305EP

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear + Switching

Package:: -

Datasheet:: L9305EP.pdf

Description:: PTS ASSP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,480

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

Product details

Overview

L9305EP from STMicroelectronics is a monolithic 4-channel solenoid driver IC qualified to AEC-Q100 and compliant with ISO 26262 ASIL-D for automotive safety-critical systems. It integrates high-side/low-side drivers, current sensing (±5 mA accuracy up to 0.5 A), 13-bit programmable current set-point resolution, and redundant fault monitoring. Used in automatic transmission valve control, electronic stability control, and active suspension systems.

For engineers reviewing the L9305EP datasheet, L9305EP pinout, L9305EP application, or L9305EP equivalent, this page delivers verified technical context, SPI register-level diagnostics, fail-safe pre-driver architecture, thermal monitoring, and dual-package (PowerSSO36/TQFP48) layout guidance - all critical for functional safety validation and ECU integration.

Technical Context

The L9305EP implements four independent, configurable HS/LS current-controlled drivers with integrated recirculation transistors and dual-path current sensing per channel. Each channel supports programmable dither modulation, slew rate control, and operates across 0–2 A extended range with 0.33 mA resolution.

It features a 32-bit SPI interface with 5-bit CRC, frame counter, and address feedback for secure configuration and real-time status reporting. Safety architecture includes redundant EN_DR enable path, VDS-monitored fail-safe pre-drivers (FS_Dx/FS_Sx/FS_Gx), BIST-based diagnostics, on-die temperature sensor, and EEPROM CRC-protected calibration memory.

Key Specifications

Parameter	Value and Actual Design Meaning
Driver Channels	4 independent, software-configurable high-side or low-side outputs
Current Range	0–1.5 A (normal), ±5 mA accuracy ≤0.5 A; 0–2 A (extended), ±4% accuracy 0.5–2 A
R_DS(ON)	Max 375 mΩ @ T_j = 175 °C - enables high-efficiency solenoid drive at elevated junction temperatures
Current Resolution	13-bit set-point resolution: 0.25 mA (0–1.5 A), 0.33 mA (0–2 A)
SPI Interface	32-bit frames with 5-bit CRC, address feedback, frame counter, long/short frame detection
Safety Certification	AEC-Q100 Grade 0 (−40 °C to +150 °C ambient), ISO 26262 ASIL-D ready
Operating Junction Temp	−40 °C to +175 °C - validated functionality at full range, with electrical parameters guaranteed to +150 °C

Pinout & Package

Package: PowerSSO36 (exposed pad down, 10.0 × 6.0 × 1.75 mm), thermally optimized for automotive under-hood mounting with R_{th j-a} = 22 °C/W (natural convection, 2s2p board).

Pin	Circuit Role	Design Meaning
GND_SOL0–GND_SOL3	Channel Ground Terminals	Dedicated low-inductance ground return paths per solenoid channel - essential for accurate dual-path current sensing
VS_SOL0–VS_SOL3	Channel Supply Inputs	Switched battery voltage inputs with reverse-protection diode support; rated to 40 V transient (ISO 7637-2)
LOAD_SOL0–LOAD_SOL3	Driver Output Terminals	High-current source/sink nodes connecting directly to solenoid windings; support both HS and LS configurations
EN_DR	Global Enable Input	Active-high safety-critical enable; disables all channels and resets registers when low; echoes status in SPI frames
FAULTn	Open-Drain Fault Output	Asserts low on unmasked faults (thermal, overcurrent, VDD/VBATP, EEPROM CRC, BIST failure); requires external pull-up
FS_D0–FS_D3, FS_S0–FS_S3, FS_G0–FS_G3	Fail-Safe Pre-Driver Terminals	Three-pin per-channel interface to external N-FET for redundant hardware-level shutdown; includes VDS monitoring capability
CS / MOSI / MISO / SCLK	SPI Interface Pins	5 V / 3.3 V tolerant digital interface supporting secure, CRC-verified register access and diagnostic readback

Key Features

Feature	Design Value
Redundant Current Sensing	Dual independent sense paths per channel - ensures fail-operational current regulation even if one path fails
Programmable Dither Modulation	Configurable frequency/amplitude superimposed on set-point current - suppresses solenoid mechanical resonance in ECU-controlled valves
Calibration Memory with CRC	On-chip EEPROM stores trimming data and configuration; CRC verification prevents corruption-induced misconfiguration
Temperature-Monitored Operation	Integrated die temperature sensor feeds real-time thermal data to SPI registers - enables dynamic current derating in active suspension systems
Safe Enable Architecture	Dual-path EN_DR logic with internal echo check and fail-safe pre-driver interlock - meets ASIL-D requirement for single-point fault tolerance

Applications

Automatic Transmission Valve Control

Electronic Stability Control (ESC)

Use Scenario: Precise proportional current control of shift solenoids and pressure control valves in 8-speed automatic transmissions.

IC Role / Device Role / Timing Role: Primary current-regulated driver for hydraulic actuation; replaces discrete FET + op-amp + shunt solutions.

Use Value: Enables <1% current accuracy across temperature and lifetime, meeting OEM torque consistency requirements for gear engagement smoothness.

Use Scenario: Closed-loop current control of yaw/brake pressure modulator solenoids during ABS and traction control events.

IC Role / Device Role / Timing Role: High-reliability, ASIL-D-compliant driver with sub-10 µs fault response time via FAULTn assertion.

Use Value: Redundant current sensing and BIST diagnostics ensure uninterrupted ESC function during V_BAT transients or EMI exposure.

Active Suspension Damping Control

Electric Power Steering (EPS) Assist Valves

Use Scenario: Real-time damping force adjustment via fast-response solenoid valves in semi-active magnetorheological dampers.

IC Role / Device Role / Timing Role: Solenoid driver with programmable dither and 13-bit resolution - synchronizes with vehicle dynamics controller at 1 kHz update rate.

Use Value: Dither modulation eliminates stick-slip hysteresis in damper fluid flow, improving ride comfort at 5–20 Hz frequencies.

Use Scenario: Hydraulic assist pressure modulation in column-assist EPS systems using solenoid-controlled flow restrictors.

IC Role / Device Role / Timing Role: Safety-critical current driver with EN_DR interlock and FAULTn interrupt - integrated into EPS MCU's ASIL-B domain.

Use Value: Fail-safe pre-driver (FS_Dx/FS_Sx/FS_Gx) provides hardware-level torque cut-off within 100 µs upon microcontroller lockup.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE9201SE	2-channel, no integrated charge pump; requires external bootstrap circuitry for HS operation	Limited to simpler valve banks; lacks ASIL-D certification and dual-path current sensing	Choose for cost-sensitive non-ASIL systems where channel count and redundancy are not required
BD3901FV	4-channel, but only ±10% current accuracy above 0.5 A; no fail-safe pre-driver pins or VDS monitoring	Not certified to AEC-Q100 Grade 0 or ISO 26262; unsuitable for transmission/ESC safety domains	Consider only for industrial linear actuator control without functional safety mandates

Compared with TLE9201SE and BD3901FV, the L9305EP uniquely delivers ASIL-D readiness, 4-channel redundancy, ±5 mA current accuracy at low loads, and hardware-enforced fail-safe shutdown - making it the sole option for production automotive transmission and ESC ECUs requiring zero single-point faults.

Availability

L9305EP is available at Aetrix Electronics and suitable for automatic transmission control units, electronic stability control modules, and active suspension ECUs requiring stable component supply with full automotive qualification traceability.

Supply support for L9305EP 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, specializing in automotive, industrial, and power management ICs with deep expertise in functional safety and high-temperature reliability.

The L9305EP belongs to ST's Automotive Smart Power family, designed specifically for ASIL-D hydraulic actuation in powertrain and chassis systems - emphasizing redundancy, diagnostic coverage, and robustness under extreme thermal and EMC conditions.

FAQ

What is the maximum continuous output current per channel for L9305EP?

The L9305EP supports up to 2 A per channel in extended range mode, with ±4% accuracy from 0.5 A to 2 A. Thermal derating applies above T_j = 150 °C; full 2 A operation is validated up to T_j = 175 °C with appropriate PCB copper area and airflow. The device includes on-die temperature monitoring to enable dynamic current limiting in real time.

How does the fail-safe pre-driver (FS_Dx/FS_Sx/FS_Gx) interface with external components?

The FS_Dx, FS_Sx, and FS_Gx pins form a dedicated three-terminal interface to an external N-channel MOSFET used as a hardware-level safety switch. FS_Gx drives the gate, FS_Sx connects to source (for V_DS monitoring), and FS_Dx connects to drain. This path operates independently of the main driver logic and cuts off solenoid power within microseconds upon internal fault detection or EN_DR deactivation.

Can L9305EP operate in both hardware and software control modes?

Yes - the INx/NDISx pins support two distinct modes. In Hardware Mode, they act as simple enable/disable signals for closed-loop current regulation. In Software Mode, they accept PWM inputs to directly control driver switching, enabling custom current waveforms. Mode selection is configured via SPI register DRVCFG0[1:0], and the behavior is validated across temperature and voltage ranges per DS12774 Rev 10.

Is L9305EP pin-compatible between PowerSSO36 and TQFP48 packages?

No - PowerSSO36 (36-pin) and TQFP48 (48-pin) have different pin counts and layouts. TQFP48 adds dedicated FS_G1/FS_S1/FS_D1 and FS_G2/FS_S2/FS_D2 pins plus NC pads, while PowerSSO36 consolidates fail-safe functions per channel into shared routing. Signal mapping differs: e.g., IN_DIS0 is Pin 4 in PowerSSO36 but Pin 13 in TQFP48. Board redesign is required for package interchange.

L9305EP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: *

Package/Case:: -

Packaging:: Tube

Product Status:: Active

Topology:: -

Number of Outputs:: -

Frequency - Switching:: -

Voltage/Current - Output 1:: -

Voltage/Current - Output 2:: -

Voltage/Current - Output 3:: -

w/LED Driver:: -

w/Supervisor:: -

w/Sequencer:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

L9305EP FAQ

1.How can I place an order for L9305EP through Aetrix?

Please submit a Request for Quotation (RFQ) for L9305EP 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 L9305EP reliable?

The price and inventory of L9305EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9305EP is usually 5 days.

3.What payment methods are accepted for L9305EP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9305EP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9305EP?

L9305EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9305EP 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 L9305EP?

For technical support, including L9305EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9305EP requirements.

6.How does Aetrix verify that L9305EP is sourced from the original manufacturer or authorized distributors?

All L9305EP 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 L9305EP meets industry standards.

7.What is the process for return or replacement of L9305EP?

All L9305EP units undergo pre-shipment inspection (PSI). If there is an issue with L9305EP, 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 L9305EP part is unused and in its original packaging.

Return procedure for L9305EP:

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…