L9753CAXPTR - Multi-Channel Engine Control PMIC | STMicroelectronics
MPN: L9753CAXPTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.09 | $11.09 |
| 10 | $10.4 | $104.00 |
| 100 | $9.1 | $910.00 |
| 500 | $7.85 | $3,925.00 |
| 1,000 | $6.95 | $6,950.00 |
L9753CAXPTR Overview
A PMIC (Power Management Integrated Circuit) is a mixed-signal device that combines multiple voltage regulators, gate drivers, watchdog timers, and communication interfaces into one package. The L9753 family sits within ST's automotive PMIC hierarchy as an Engine Control IC, bridging the gap between simple power switches and full ECU microcontrollers. It typically works alongside an SPC5 or STM32 microcontroller, providing the high-current drive stage that the MCU cannot source directly.
Key features of the L9753CAXPTR include integrated charge-pump support for N-channel high-side switching, programmable current-limit and thermal-shutdown per output, ISO 7637/16750-compatible transient robustness, and SPI diagnostics for fault reporting. It operates over an automotive battery range from 4.5V to 36V and survives load-dump events up to 40V. Each low-side channel handles peak currents appropriate for injector and ignition coil drive.
Typical use cases include gasoline direct-injection ECUs, electronic throttle body controllers, transmission control modules, and 12V body-wirder nodes requiring multiple high-current outputs. Compared with discrete MOSFET + gate-driver solutions, the L9753CAXPTR reduces PCB area by roughly 60% and improves diagnostic coverage through per-channel fault flags. According to the ST product page, the device is qualified to AEC-Q100 Grade 1, making it suitable for under-hood deployment.
When designing with the L9753CAXPTR, observe the maximum junction temperature of 150C and use the exposed pad as the primary thermal path. Decoupling capacitors must be placed within 5 mm of the supply pins, and the SPI bus should be isolated if the MCU sits on a different supply domain. Read together with the SPC56 or SPC58 MCU datasheet for typical application reference schematics.
This page synthesizes distributor inventory, parametric pricing, drop-in alternatives, and design notes that complement - but do not replace - the manufacturer datasheet.
Drop-in alternatives for L9753CAXPTR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with L9753CAXPTR (same form factor and footprint) — differing in Package, Product Type, RoHS Status, AEC-Q100 Qualification, Communication Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
L9753CAX
✅ Drop-In📋 Reference alternative (not in catalog)
L9678PTR-S
✅ Drop-In✓ In Stock
$3.5 / Unit
View Datasheet →L9679P
✅ Drop-In✓ In Stock
$6.18 / Unit
View Datasheet →ISO8200BTR
✅ Drop-In✓ In Stock
$5.2 / Unit
View Datasheet →L9753CAXPTR Maximum Ratings & Electrical Characteristics
| Product Type | Automotive Engine Control PMIC / Multi-channel Driver |
| Number of High-side Drivers | 3 pre-drivers (N-channel external MOSFETs) |
| Number of Low-side Drivers | 8 N-channel MOSFET drivers |
| Supply Voltage Range | 4.5 V to 36 V (load-dump tolerant to 40 V) |
| Output Configuration | 3:8 High-side pre-driver / Low-side driver |
| Communication Interface | SPI (diagnostics and fault flags) |
| Operating Temperature Range | -40C to +150C (AEC-Q100 Grade 1, Tj max) |
| Package | PowerSSO-36 with exposed thermal pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| AEC-Q100 Qualification | Yes - Grade 1 |
| RoHS Compliance | Compliant |
| Lead-Free | Yes |
| Charge Pump | Integrated, for N-channel high-side gate drive |
| Diagnostics | Per-channel open-load, short-to-ground, short-to-battery, thermal warning |
| Manufacturer | STMicroelectronics |
L9753CAXPTR powersso-36 with exposed thermal pad Pin Configuration Guide
Pin configuration for L9753CAXPTR (powersso-36 with exposed thermal pad package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for L9753CAXPTR.
Refer to the datasheet for full pin configuration.
Typical Applications
L9753CAXPTR is suitable for 6 applications: 4-Cylinder Gasoline Engine Control Unit, Electronic Throttle Body Controller, Automatic Transmission Control Module, Diesel Engine ECU (Common-Rail Injectors), Motorcycle ECU / Powersport Engine Control, Industrial 24V Solenoid / Relay Controller.
4-Cylinder Gasoline Engine Control Unit
The L9753CAXPTR is purpose-built for 4-cylinder gasoline direct-injection ECUs where it drives 4 fuel injectors, ignition coils, the electronic throttle body, oxygen-sensor heaters, and various solenoid loads from one IC. Its 3 high-side pre-drivers and 8 low-side drivers match 4 direct-injection channels plus auxiliary outputs, and the integrated SPI diagnostics let the host MCU read per-channel fault flags (open-load, short-to-ground, short-to-battery) every injection cycle. The AEC-Q100 Grade 1 qualification supports under-hood mounting with ambient temperatures to 125C, and the 4.5V to 36V supply range with 40V load-dump tolerance covers the full ISO 16750-2 transient envelope of a 12V automotive battery.
Recommended
Electronic Throttle Body Controller
The L9753CAXPTR drives the dual H-bridge that controls an electronic throttle body, with its 8 low-side drivers paired with 3 high-side pre-drivers to drive the two throttle-plate motors and a position-sensor heater. The per-channel current limiting prevents stall-current damage if the throttle plate jams, while the SPI fault diagnostics report partial short-circuit or open-load conditions back to the ECU within 200 microseconds. The 5 MHz SPI bus is fast enough for closed-loop throttle position control at 1 kHz update rates, and the AEC-Q100 Grade 1 thermal rating handles under-hood ambient peaks without derating.
Recommended
Automatic Transmission Control Module
The L9753CAXPTR is well suited to automatic transmission control modules where it drives shift solenoids, line-pressure control valves, torque-converter lockup clutch, and gear-position sensors. Its 8 low-side outputs can each handle PWM-driven proportional solenoids at frequencies up to 2 kHz, while the 3 high-side pre-drivers power the lockup clutch and main pressure regulator. The integrated SPI diagnostics detect solenoid winding shorts before they damage the PCB, and the 40V load-dump tolerance protects against transients from the transmission harness.
Recommended
Diesel Engine ECU (Common-Rail Injectors)
The L9753CAXPTR's high-side pre-drivers and 8 low-side drivers can drive piezo common-rail injectors on a 4-cylinder diesel engine, where the charge-pump-based high-side stage generates the gate-drive voltage needed for N-channel high-side MOSFETs. The device's AEC-Q100 Grade 1 rating supports under-hood ambient up to 125C, and its SPI fault diagnostics monitor each injector winding for short-to-ground faults. Compared with discrete driver solutions, the L9753CAXPXPTR reduces PCB area by roughly 60 percent and consolidates fault reporting to one SPI bus, simplifying the ECU software architecture.
Recommended
Motorcycle ECU / Powersport Engine Control
The L9753CAXPTR can be applied to motorcycle and powersport engine controllers where space is at a premium and a single driver IC must replace several discrete MOSFET+gate-driver chains. Its PowerSSO-36 footprint occupies roughly 30 percent less board area than competing multi-channel solutions, and its AEC-Q100 Grade 1 thermal performance handles the vibration and ambient peaks typical of powersport applications. The 3 high-side and 8 low-side drivers can drive fuel injectors, ignition coils, idle-air control valves, and fan control relays from one SPI-controlled stage.
Recommended
Industrial 24V Solenoid / Relay Controller
Although designed for automotive use, the L9753CAXPTR's 4.5V to 36V supply range and 8 low-side outputs make it equally useful for industrial 24V solenoid and relay controllers in factory automation. Each low-side channel handles PWM-driven proportional solenoids up to a few hundred mA, and the integrated SPI interface lets a host PLC read open-load diagnostics over an SPI-to-CAN bridge. The exposed-pad PowerSSO-36 package dissipates heat into a DIN-rail mountable aluminum backplate, allowing 8-channel solenoid drive at industrial ambient temperatures to 85C without active cooling.
Recommended
Recommended Products Summary
Engineering reference data for L9753CAXPTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9753CAX | L9678PTR-S | L9679P | ISO8200BTR |
|---|---|---|---|---|---|
| Package | PowerSSO-36 (exposed pad) | PowerSSO-36 (exposed pad) - same | PowerSSO-36 (exposed pad) - same | PowerSSO-36 (exposed pad) - same | PowerSSO-36 (exposed pad) - same |
| Brand | STMicroelectronics | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same | STMicroelectronics - same |
| Product Function | Engine Control PMIC (3 HS pre + 8 LD drivers) | Engine Control PMIC - identical die | Airbag/squib driver IC | Airbag/safety multi-channel IC | 8-channel isolated intelligent power switch |
| Output Topology | 3 HS pre-drivers + 8 LD drivers | 3 HS pre-drivers + 8 LD drivers - same | 8-channel airbag drivers | Multi-channel safety drivers | 8 HS/LS isolated channels with galvanic isolation |
| Communication | SPI (up to 5 MHz) | SPI - same | SPI | SPI | SPI |
| Supply Voltage Range | 4.5V to 36V (40V load-dump) | 4.5V to 36V - same | 4.5V to 28V | 4.5V to 28V | 4.5V to 36V |
| AEC-Q100 Grade | Grade 1 (-40C to +150C Tj) | Grade 1 - same | Grade 1 | Grade 1 | Grade 1 |
| Charge Pump (for N-channel HS drive) | Yes - integrated | Yes - same | Yes | Yes | Internal (isolated supply) |
| Packing Format | Tape & Reel (PTR suffix) | Tube | Tape & Reel | Tube (P suffix) | Tape & Reel |
Key Differentiators
- Engine-control-optimized 3 high-side + 8 low-side driver topology (vs ISO8200BTR)
- Tape-and-reel packing variant of the same silicon (vs L9753CAX)
- AEC-Q100 Grade 1 qualification with -40C to +150C Tj range (vs L9678PTR-S)
Design Notes
The PowerSSO-36 exposed pad is the primary thermal path. At full 8-channel drive (assuming 500 mA peak per low-side at 100 percent duty) the IC can dissipate up to 2 W. Place at least 1 square cm of copper directly under the exposed pad on top and bottom PCB layers connected by thermal vias. Without sufficient copper, junction temperature may exceed 150C and trigger thermal shutdown under sustained fault conditions.
Place the battery-supply decoupling capacitors (typically 100 nF ceramic in parallel with 10 uF electrolytic) within 5 mm of the VCC pin. Keep the SPI traces short and route away from the gate-drive outputs to avoid capacitive coupling into the SPI bus, which can corrupt fault-flag reads during high-strain-time switching events. A continuous GND pour beneath the device improves both thermal performance and EMI immunity.
Do not operate the L9753CAXPTR without the SPI watchdog being serviced - the device defaults to a safe state (all outputs off) if SPI communication is interrupted beyond the watchdog timeout. Always initialize the configuration registers before enabling any driver channel, and ensure the host MCU enables SPI CS in push-pull mode (not open-drain) to avoid spurious SPI glitches during ECU power-up.
Compliance Information
RoHS and REACH compliant per ST product page. AEC-Q100 Grade 1 qualified for automotive under-hood environments. Lead-free reflow-compatible per JEDEC J-STD-020.
