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STMicroelectronics L9001-TR
- Part No.:
- L9001-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Power Management - Specialized
- Package:
- 24-PowerBSOP (0.295", 7.50mm Width)
- Datasheet:
-
L9001-TR.pdf
- Description:
- SPS - SIMPLE POWER SUPPLY - MULT
- Quantity:
- Payment:
- Shipping:
Inventory:4,788
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Product details
Overview
L9001-TR from STMicroelectronics is an AEC-Q100 qualified automotive power supply IC integrating three configurable voltage regulators (VDD1 buck, VDD2 buck/LDO, ADCLDO), supervision circuitry (VS monitoring, overtemperature detection, output overcurrent protection), and fail-safe functions including watchdog, under/overvoltage reset generation, and low-power mode. It delivers 3.3 V/5 V/6 V @ 1 A (VDD1), 0.8–5.0 V @ 1 A (BUCK) or 300 mA (LDO) (VDD2), and 3.3 V/5 V @ 100 mA (ADCLDO) for microcontroller core, peripherals, and ADC reference in body control modules.
For engineers reviewing the L9001-TR datasheet, L9001-TR pinout, L9001-TR application, or L9001-TR equivalent, key selection criteria include regulator configurability via CONF pins, integrated diagnosis (RSTN1/RSTN2/ADCMON/TWN outputs), watchdog timing via external capacitor on WDT, thermal shutdown at 175 °C junction, and PowerSSO-24 package with exposed pad for automotive thermal reliability.
Technical Context
The L9001-TR implements a hierarchical power architecture: VDD1 operates as an asynchronous buck pre-regulator (3.3/5/6 V, 1 A) feeding VDD2 or external loads; VDD2 is software-configurable as either a synchronous buck (0.8–5.0 V, 1 A) or linear regulator (300 mA); ADCLDO provides isolated 3.3/5 V, 100 mA supply with dedicated monitor output (ADCMON).
Supervision includes VS undervoltage/overvoltage detection triggering safe state entry, internal temperature monitoring with TWN flag and thermal shutdown at 175 °C, and charge pump health monitoring. The watchdog block uses external capacitor on WDT to set timeout period and asserts WDO on failure, while latch mode disables system after repeated faults in watchdog, thermal, or charge pump subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD1 Output Voltage | Configurable to 3.3 V / 5.0 V / 6.0 V via CONF3 pin; enables flexible pre-regulation for downstream rails or MCU peripherals. |
| VDD2 Output Mode | Selectable BUCK (0.8–5.0 V, 1 A) or LDO (300 mA) via CONF2 pin; supports MCU core or I/O rail with efficiency vs. noise trade-off. |
| ADCLDO Output | 3.3 V or 5.0 V @ 100 mA via CONF1 pin; dedicated low-noise supply for ADC reference with independent fault monitoring (ADCMON). |
| Operating Input Range | VS = 5.5 V to 18 V; validated for 12 V automotive battery systems with cold-crank and load-dump tolerance. |
| Junction Temperature | -40 °C to +175 °C; AEC-Q100 Grade 0 qualification ensures operation in under-hood environments. |
| Fail-Safe Outputs | RSTN1, RSTN2, ADCMON, TWN, WDO - open-drain active-low flags for system-level fault handling and reset coordination. |
| Low-Power Mode | STBY pin high enables reduced quiescent current while maintaining bypass LDOs; auto-recovery when load demand increases. |
Pinout & Package
Package: PowerSSO-24 (exposed pad down), thermally enhanced for automotive under-hood applications; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, EP | GND | Global power ground and thermal path; exposed pad requires direct connection to PCB ground plane for thermal dissipation. |
| 3, 4 | RSTN1, RSTN2 | Open-drain reset outputs asserting low on VDD1/VDD2 undervoltage or overvoltage; drive external MCU reset or safety logic. |
| 5 | VDDIO | I/O voltage reference for digital interface pins (CONFx, WDI, STBY); decoupling required for noise immunity. |
| 6, 17, 18 | CONF3, CONF1, CONF2 | Digital configuration inputs latched at power-up; set VDD1 voltage (CONF3), ADCLDO voltage (CONF1), and VDD2 mode (CONF2). |
| 7 | WAKE | Edge-triggered wake-up input; initiates transition from OFF/LOW POWER mode to ACTIVE mode without full power cycle. |
| 8, 13 | V1O, V2O | Switching node (V1O) and BUCK output/LDO output (V2O); require external inductor (V1O) and feedback resistor divider (V2O). |
| 9 | VS | Main battery input (5.5–18 V); powers all regulators and internal blocks; monitored for UV/OV fault detection. |
| 10–12 | CP, CP1, CP2 | Charge pump outputs/capacitor connections; enable high-side gate drive for internal FETs; CP undervoltage triggers safe state. |
| 14 | VR1 | VDD1 output sense / VDD2 input; allows cascaded regulation (VDD1 → VDD2) or direct battery feed to VDD2. |
| 15 | FB2 | VDD2 feedback input; connects to external resistor divider for precise BUCK output voltage setting (0.8–5.0 V). |
| 16, 19 | VR2, VADC | VDD2 bypass output and ADCLDO regulated output; VR2 supplies local logic; VADC powers ADC reference with dedicated monitor. |
| 20 | TWN | Thermal warning flag; asserts low before shutdown (Tj ≈ 150 °C), enabling preemptive system throttling. |
| 21, 24 | WDI, WDO | Watchdog input and error output; WDI receives MCU clock signal; WDO asserts low on timeout or sync failure. |
| 22 | STBY | Standby mode control; high level enters LOW POWER mode with regulators active but bias current minimized. |
| 23 | WDT | Watchdog timer capacitor connection; sets timeout period (±30% tolerance); determines watchdog window duration. |
Key Features
| Feature | Design Value |
|---|---|
| Triple Regulator Architecture | VDD1 (asynchronous buck), VDD2 (configurable buck/LDO), ADCLDO (dedicated LDO) - enables single-chip power tree for MCU + peripherals + analog subsystems. |
| Hardware-Configurable Outputs | Voltage and mode selection via discrete CONF pins (no firmware required); eliminates need for I²C/SPI configuration in safety-critical paths. |
| Integrated Fail-Safe Diagnostics | Independent reset outputs (RSTN1/RSTN2/ADCMON), thermal warning (TWN), and watchdog (WDO) - supports ASIL-B system-level fault containment. |
| Automotive Thermal Robustness | 175 °C max junction temperature with PowerSSO-24 exposed pad; Rθ(j-case) = 2 °C/W enables reliable operation in engine compartment environments. |
| Low-Power Mode with Auto-Recovery | STBY-controlled mode reduces quiescent current while maintaining regulated outputs; automatic reactivation prevents brownout during transient load surges. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) Camera ECU |
|---|---|
|
Use Scenario: Centralized power management for door modules, lighting controls, and window lifters in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Primary power supply IC delivering VDD1 (5 V for MCU), VDD2 (1.2 V for CAN transceiver), and ADCLDO (3.3 V for sensor interface). Use Value: Eliminates discrete DC-DC + LDO combinations; reduces BOM count by 3–4 components while providing unified fault reporting via RSTN1/RSTN2/ADCMON. |
Use Scenario: Powering image sensor, ISP, and CAN/FlexRay communication in front-facing camera ECUs requiring high reliability. IC Role / Device Role / Timing Role: Dual-rail regulator supplying VDD2 (1.0 V core for ISP) and ADCLDO (3.3 V for analog front-end), with TWN flag enabling thermal derating before shutdown. Use Value: Maintains stable 1.0 V core supply under thermal stress; ADCLDO's dedicated monitor prevents ADC data corruption during voltage droop events. |
| Infotainment Head Unit | Electric Power Steering (EPS) Control Unit |
|
Use Scenario: Supplying application processor, display driver, and audio codec in dashboard infotainment systems. IC Role / Device Role / Timing Role: Hierarchical regulation: VDD1 (5 V for USB PHY), VDD2 (BUCK mode, 1.1 V for SoC core), ADCLDO (3.3 V for touch controller). Use Value: Configurable VDD2 BUCK mode achieves >90% efficiency at 1 A load; ADCLDO isolation prevents switching noise from degrading touch sensitivity. |
Use Scenario: Powering torque motor drivers, position sensors, and MCU in safety-critical EPS systems meeting ISO 26262 ASIL-C requirements. IC Role / Device Role / Timing Role: Safety-oriented regulator with fail-safe outputs: RSTN2 triggers MCU reset on VDD2 fault; WDO monitors MCU oscillator integrity; TWN enables early thermal intervention. Use Value: Reduces diagnostic coverage gap by integrating watchdog, thermal, and supply monitoring into single AEC-Q100 device - simplifies FMEDA analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP81239MNTXG | Single-buck controller (no integrated FETs); requires external MOSFETs and separate LDOs for VDD2/ADCLDO rails. | Lacks integrated diagnosis (no RSTN2/TWN/ADCMON), watchdog, or low-power mode - demands external safety monitoring. | Choose when board space permits discrete FETs and system-level diagnostics are implemented externally. |
| TPS65381A-Q1 | Three integrated buck regulators (no LDO option for VDD2); fixed 3.3 V ADCLDO; no CONF-pin configurability - all settings programmed via SPI. | Requires MCU firmware interaction for configuration; lacks hardware-latched CONF pins for fail-operational boot sequences. | Prefer when SPI-based dynamic voltage scaling is needed and ASIL-B diagnostics are handled by host MCU. |
Compared with NCP81239MNTXG and TPS65381A-Q1, the L9001-TR uniquely combines hardware-configurable triple regulation, integrated fail-safe outputs (RSTN1/RSTN2/ADCMON/TWN/WDO), and AEC-Q100 Grade 0 thermal rating in a single PowerSSO-24 package - reducing design complexity for ASIL-B systems requiring deterministic power sequencing and fault reporting without MCU dependency.
Availability
L9001-TR is available at Aetrix Electronics and suitable for body control modules, ADAS camera ECUs, infotainment head units, and electric power steering control units requiring stable component supply across automotive production lifecycles.
Supply support for L9001-TR 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 specializing in automotive, industrial, and power management solutions, with broad portfolio of AEC-Q100 qualified devices and functional safety expertise.
The L9001 belongs to ST's SPS (Simple Power Supply) product line, designed specifically for cost-sensitive, safety-aware automotive ECUs needing integrated multi-rail regulation, supervision, and fail-safe operation without external configuration interfaces.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The L9001-TR is rated for continuous operation up to 175 °C junction temperature, validated per AEC-Q100 Grade 0 requirements. Thermal shutdown activates above this threshold, and the TWN pin asserts low at approximately 150 °C to provide early warning. The PowerSSO-24 package's 2 °C/W junction-to-case thermal resistance enables effective heat transfer to the PCB ground plane when the exposed pad is properly soldered.
How is VDD2 configured as either a buck or LDO regulator?
VDD2 mode is selected exclusively via the CONF2 pin: a HIGH logic level (connected to VS) configures it as a buck converter (0.8–5.0 V, 1 A), while a LOW level (connected to GND) configures it as an LDO (300 mA). This hardware-based selection is latched at power-up and requires no firmware or serial interface, ensuring deterministic behavior during boot and safety-critical operation.
Can the L9001-TR operate with VS below 6.5 V?
Yes, the L9001-TR operates with VS as low as 5.5 V, but VDD1 output performance degrades below 6.5 V depending on configuration - particularly at higher output voltages (e.g., 6 V) and load currents. For robust VDD1 regulation across full temperature range, VS ≥ 6.5 V is recommended; operation at 5.5–6.5 V is valid but requires verification of VDD1 ripple and dropout margin in the target application.
What happens to the regulators during low-power mode?
In low-power mode (activated by STBY = HIGH), main regulators (VDD1, VDD2, ADCLDO) remain active and continue supplying loads, but internal bias circuits and non-essential blocks are powered down to reduce quiescent current. Load current is continuously monitored; if demand exceeds threshold, the device automatically exits low-power mode to restore full functionality - preventing brownout without MCU intervention.
L9001-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-PowerBSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 150µA
- Voltage - Supply:
- 5.5V ~ 18V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSSO-24
L9001-TR FAQ
1.How can I place an order for L9001-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L9001-TR 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 L9001-TR reliable?
The price and inventory of L9001-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9001-TR is usually 5 days.
3.What payment methods are accepted for L9001-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9001-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L9001-TR?
L9001-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L9001-TR 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 L9001-TR?
For technical support, including L9001-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9001-TR requirements.
6.How does Aetrix verify that L9001-TR is sourced from the original manufacturer or authorized distributors?
All L9001-TR 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 L9001-TR meets industry standards.
7.What is the process for return or replacement of L9001-TR?
All L9001-TR units undergo pre-shipment inspection (PSI). If there is an issue with L9001-TR, 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 L9001-TR part is unused and in its original packaging.
Return procedure for L9001-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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