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STMicroelectronics L5962
- Part No.:
- L5962
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- PowerSO-36 Exposed Top Pad
- Datasheet:
-
L5962.pdf
- Description:
- IC REG CONV CAR AUD 5OUT PWRSO36
- Quantity:
- Payment:
- Shipping:
Inventory:1,968
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Product details
Overview
L5962 from STMicroelectronics is a multi-rail automotive power management IC for car-radio systems, integrating one synchronous step-down switching regulator (1.2–8 V, up to 2.5 A), three programmable linear regulators (VSTBY: 3.3/5 V @ 150 mA; VLR1: 5/8.5 V @ 350 mA; VLR2: 3.3/10 V @ 1 A), two I²C-controlled high-side drivers (0.5 V drop @ 0.5 A), reset with configurable delay, battery UV/OV detection, and load-dump protection - all in a single PowerSO36 package.
For engineers reviewing the L5962 datasheet, L5962 pinout, L5962 application, or L5962 equivalent, this device supports complex voltage sequencing, I²C-configurable rail selection, thermal-protected high-side switching, and low-quiescent-current standby operation critical for infotainment system power architecture design and compliance with automotive battery transient requirements.
Technical Context
The L5962 implements a BCD-process-based mixed-signal power SoC with independent thermal shutdown per regulator and driver, enabling safe concurrent operation of multiple regulated rails under varying load and temperature conditions. Its I²C interface controls VLR1/VLR2 output selection and enables/disables both switched linear regulators and high-side drivers with register-level granularity.
The switching regulator features internal NDMOS high-/low-side FETs, 185 kHz free-run frequency (extendable to 400 kHz via SYNC), and selectable current limit (1.2 A / 2.5 A) via CLIM pin. The VSTBY regulator remains active during battery backup (min 4.5 V with external Schottky), delivering ≤90 µA quiescent current across –40 °C to +85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VSTBY Output | 3.3 V or 5 V selectable via VSTBYSEL pin; supports always-on standby logic with ≤90 µA IQ |
| VLR1 Output | 5 V or 8.5 V selectable via I²C; delivers 350 mA with 650 mV dropout at full load |
| VLR2 Output | 3.3 V or 10 V selectable via I²C; delivers 1 A with 1.2 V dropout at 3.3 V output |
| Switching Regulator | 1.2–8 V adjustable via resistor divider; 2.5 A max load; 185 kHz free-run (220–400 kHz sync-capable) |
| High-Side Drivers | Two independent drivers; 0.5 V max saturation drop @ 0.5 A; short-to-battery/ground and loss-of-ground protected |
| Battery Detection | UV threshold 7.5 V (adjustable via LVWIN); OV shutdown at 29 V; hysteresis ≥400 mV on OV, ≥1 V on UV |
| Reset Function | RST open-drain output asserted until VSTBY regulation + RSTDLY capacitor charge; delay configurable via external cap (25–75 µs typical) |
Pinout & Package
Package: PowerSO36 (slug-up), thermally enhanced with exposed TAB connected to PGND for optimal heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB (Pin 1) | Thermal pad / GND | Mandatory connection to PCB ground plane for thermal management and EMI reduction |
| PGND (Pin 2) | Switching regulator ground | Power return path for high-current switching stage; must be separated from AGND |
| CBS (Pin 3) | Bootstrap capacitor input | Provides gate drive voltage for internal high-side NDMOS; requires 0.1 µF ceramic |
| PH (Pin 4) | Switching phase output | Drives external inductor; connects to PHASE node in buck converter topology |
| VINsw (Pin 7) | Switching regulator input | Direct battery feed (VBAT) for buck stage; rated for 50 V transients |
| HSD1/HSD2 (Pins 8, 11) | High-side driver outputs | Drive lamps, relays, or solenoids; integrated diagnostics and fault reporting via I²C |
| VSTBYSEL (Pin 15) | Standby regulator selector | GND = 3.3 V; 5 V = 5 V; sets VSTBY output before I²C initialization |
| SCL/SDA (Pins 29, 24) | I²C bus interface | Standard-mode (≤400 kHz) interface for configuring VLR1/VLR2, enabling HSDs, reading status |
| EN (Pin 28) | Global enable input | Active-high logic control for switching regulator and I²C controller; disables all non-VSTBY rails |
| RST/RSTDLY (Pins 27, 12) | Reset generation & delay | RST is open-drain; RSTDLY charges external cap to set release timing after VSTBY regulation |
Key Features
| Feature | Design Value |
|---|---|
| I²C-programmable dual switched linear regulators | VLR1 (5/8.5 V @ 350 mA) and VLR2 (3.3/10 V @ 1 A) enable flexible rail assignment without hardware changes |
| Always-on 3.3/5 V standby regulator with ultra-low IQ | ≤90 µA quiescent current over –40 °C to +85 °C ensures compliance with automotive parking mode current budgets |
| Integrated high-side drivers with fault protection | Two drivers with short-to-battery/ground, loss-of-ground, and thermal shutdown - eliminate need for discrete protection circuitry |
| Configurable battery monitoring and reset | Adjustable UV threshold (via LVWIN), OV shutdown (29 V), and programmable RST delay support robust cold-cranking and load-dump recovery |
| Load-dump tolerant design | Withstands ISO 7637-2 Pulse 5a (±100 V, 100 ms) when used with recommended external TVS/clamp network |
Applications
| Car Radio Main Supply | Infotainment System Standby |
|---|---|
|
Use Scenario: Primary DC-DC conversion for AM/FM/DAB tuner, DSP, and display subsystems in head-unit designs. IC Role / Device Role / Timing Role: Synchronous buck regulator (VSW) provides 5 V/2.5 A main supply; VLR2 supplies 10 V to audio amplifier; VLR1 powers USB PHY. Use Value: Single-chip solution eliminates 3 discrete regulators and associated layout complexity while meeting CISPR-25 conducted emission limits via fixed-frequency operation. |
Use Scenario: Maintaining microcontroller RTC, memory retention, and wake-up logic during vehicle ignition-off state. IC Role / Device Role / Timing Role: VSTBY regulator (3.3 V selected via VSTBYSEL) remains active; draws ≤90 µA to meet ISO 16750-2 Class D quiescent current requirement. Use Value: Eliminates need for separate low-IQ LDO; integrated RST signal synchronizes MCU boot sequence with stable 3.3 V rail. |
| Automotive Audio Amplifier Bias | Head-Unit High-Side Load Switching |
|
Use Scenario: Providing clean, low-noise 10 V bias for Class AB/D audio amplifier stages in premium sound systems. IC Role / Device Role / Timing Role: VLR2 configured via I²C to 10 V output; PSRR >60 dB (120 Hz–10 kHz) suppresses battery ripple from amplifier supply. Use Value: Replaces discrete 10 V LDO + filter network; 1 A capability supports multi-channel amplifiers without thermal derating. |
Use Scenario: Controlling power to LED backlight, cooling fan, or antenna motor with diagnostic feedback. IC Role / Device Role / Timing Role: HSD1/HSD2 driven via I²C commands; real-time fault status (short, open-load) reported back over same bus. Use Value: Enables ASAM-compliant diagnostics without additional sense resistors or external comparators; reduces BOM count by 4+ components per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029 | Single 3.3 V/2.5 A buck + dual LDOs (150 mA each); no high-side drivers or I²C configurability | Lacks VLR2 1 A rail and HSDs; suitable only for simpler radio architectures without load switching | Select when system requires only basic buck+LDO and no diagnostics or programmable rail selection |
| TLE9261 | Three independent high-side switches + watchdog + SPI interface; no integrated regulators | Requires external buck/LDOs for rail generation; focuses on load control rather than power conversion | Select when primary need is intelligent load switching with CAN/SPI communication, not multi-rail regulation |
Compared with MAX20029 and TLE9261, the L5962 uniquely integrates regulation, switching, and diagnostics in one package - enabling full car-radio power architecture consolidation without sacrificing I²C-based flexibility or automotive-grade protection.
Availability
L5962 is available at Aetrix Electronics and suitable for automotive infotainment systems, head-unit power management, and telematics modules requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for L5962 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 coverage from discrete devices to highly integrated SoCs.
The L5962 belongs to ST's automotive power management IC family, designed specifically to consolidate voltage regulation, high-side driving, and system supervision in car-radio and infotainment ECUs - reducing board space, improving reliability, and accelerating time-to-market.
FAQ
What is the minimum operating voltage for the VSTBY regulator?
The VSTBY regulator operates down to 4.1 V on VBATP (protected battery input), and with an external Schottky diode for backup functionality, the system can maintain standby operation at as low as 4.5 V - meeting automotive cold-cranking requirements where battery voltage dips below 6 V during engine start.
How is output voltage selected for the VLR1 and VLR2 linear regulators?
VLR1 and VLR2 output voltages are selected exclusively via I²C register writes: VLR1 supports 5 V or 8.5 V; VLR2 supports 3.3 V or 10 V. Selection occurs after power-up and EN assertion, and configuration persists until rewritten - enabling dynamic rail reassignment during runtime without hardware modification.
Does the L5962 include built-in protection against load dump transients?
Yes - the L5962 incorporates internal clamp structures and is rated to withstand ISO 7637-2 Pulse 5a (±100 V, 100 ms) when used with the recommended external TVS diode (e.g., SM712) and input filtering network specified in the datasheet application diagram, ensuring robustness in 12 V automotive electrical systems.
Can the switching regulator be synchronized to an external clock?
Yes - the SYNC pin accepts an external clock signal between 220 kHz and 400 kHz, allowing synchronization of the internal buck converter to avoid beat frequencies with other switching regulators in the system, which is essential for meeting stringent CISPR-25 radiated emission limits in automotive EMC testing.
L5962 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- PowerSO-36 Exposed Top Pad
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Converter, Car Audio System
- Voltage - Input:
- 4.1V ~ 27V
- Number of Outputs:
- 5
- Voltage - Output:
- Multiple
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerSO-36
L5962 FAQ
1.How can I place an order for L5962 through Aetrix?
Please submit a Request for Quotation (RFQ) for L5962 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 L5962 reliable?
The price and inventory of L5962 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L5962 is usually 5 days.
3.What payment methods are accepted for L5962?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L5962 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L5962?
L5962 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L5962 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 L5962?
For technical support, including L5962 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L5962 requirements.
6.How does Aetrix verify that L5962 is sourced from the original manufacturer or authorized distributors?
All L5962 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 L5962 meets industry standards.
7.What is the process for return or replacement of L5962?
All L5962 units undergo pre-shipment inspection (PSI). If there is an issue with L5962, 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 L5962 part is unused and in its original packaging.
Return procedure for L5962:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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