My Inquiry
My Account
STMicroelectronics L5952
- Part No.:
- L5952
- Manufacturer:
- STMicroelectronics
- Category:
- Special Purpose Regulators
- Package:
- 25-Flexiwatt, Formed Leads
- Datasheet:
-
L5952.pdf
- Description:
- IC REG CONV CAR 6OUT 25FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
L5952 from STMicroelectronics is a multifunction 5-output voltage regulator with integrated high-side driver, designed for automotive car radio systems. It delivers five regulated outputs (5V@500mA, 8.3V@250mA, I²C-presettable 7.7–8.5V, 5–7.3V, and 3.3–5V) plus a 1A high-side switch (RON = 0.6Ω), all controlled via I²C interface and featuring battery detection, reset generation, and load-dump protection.
For engineers reviewing the L5952 datasheet, L5952 pinout, L5952 application, or L5952 equivalent, key selection considerations include I²C-configurable output voltages, automotive-grade transient tolerance (50V/50ms load dump), ultra-low quiescent current (80–120 µA), and integrated battery monitoring with three independent detection thresholds.
Technical Context
The L5952 integrates five linear regulators and one high-side DMOS driver in a single Flexiwatt25 package. Each regulator features independent enable/control via I²C, with VOUT3–VOUT5 offering programmable voltage settings (5–7 settings each) and VOUT2/VOUT6 supporting ON/OFF control only. The device includes four battery detection comparators (Det1–Det3, Det17) with external resistor-adjustable thresholds and hysteresis.
It implements dual reset functions: a 2–4 ms delay reset triggered by ST-CAP voltage decay, and a hard reset (50–100 ms) activated by an external RC network on HRCAP. All outputs remain functional during 27V jump-start and 50V/50ms load-dump transients, meeting automotive electrical system requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 5 regulated linear outputs + 1 high-side driver (6 total power rails) |
| VOUT1 | Fixed 5V ±2.5% @ 500mA; used for microprocessor core supply |
| VOUT2 | Fixed 8.3V ±2.4% @ 250mA; tuner supply, I²C-controllable ON/OFF |
| VOUT3–VOUT5 | I²C-presettable: 7.7–8.5V / 5–7.3V / 3.3–5V; audio, CD, DSP/microcontroller supplies |
| High-Side Driver | RON = 0.6Ω max; 1A continuous, supports load-dump and short-circuit protection |
| Battery Detection | 4 independent comparators (Det1–Det3, Det17); thresholds adjustable via external resistors |
| Quiescent Current | 80–120 µA (all outputs active); meets automotive standby power requirements |
| Transient Tolerance | Withstands 50V/50ms load dump and 27V jump-start without latch-up or regulation loss |
Pinout & Package
Package: Flexiwatt25 (vertical, 25-pin, thermally enhanced with exposed tab). Pin 1 is top-left corner (TAB = GND), pin 25 is bottom-right. Tab is electrically connected to GND and serves as primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, TAB | GND | Main power ground and thermal pad; must be soldered to PCB copper pour |
| 2 | VOUT1 | Fixed 5V regulator output (500mA); powers main microcontroller |
| 3 | DELAY CAP | Capacitor connection for 2–4 ms delay reset timing (1µF typical) |
| 4 | VOUT2 | Fixed 8.3V regulator output (250mA); tuner supply, I²C-enabled |
| 5 | BATT-DET 1 | Input for battery detection comparator 1 (threshold ~7.3V rising) |
| 6 | IN | Main input supply (9–16V nominal; up to 26V DC, 50V transient) |
| 7 | VOUT3 | I²C-programmable 7.7–8.5V output (250mA); audio subsystem supply |
| 8 | BATT-DET 2 | Input for battery detection comparator 2 (threshold ~4.65V) |
| 9 | N.C. | No connect; internal node not bonded out |
| 10 | BATT-DET 3 | Input for battery detection comparator 3 (threshold ~8.35V) |
| 11 | HRCAP | Capacitor connection for hard reset timing (1µF + 150kΩ typical) |
| 12 | BATT-DET 1 | Duplicate input for Det1; allows parallel sensing or redundancy |
| 13 | BATT-DET 2 | Duplicate input for Det2; enables multi-point battery monitoring |
| 14 | BATT-DET 3 | Duplicate input for Det3; supports redundant low-battery warning |
| 15 | BATT-DET 1 | Third instance of Det1 input; used for calibration or filtering |
| 16 | REG | Internal regulator reference node; not user-accessible |
| 17 | RESET | Open-drain reset output (active-low); asserts during undervoltage or delay timeout |
| 18 | VOUT4 | I²C-programmable 5–7.3V output (400mA); CD mechanism supply |
| 19 | DIG GND | Digital ground reference for I²C and logic interfaces |
| 20 | VOUT5 | I²C-programmable 3.3–5V output (500mA); DSP/microcontroller I/O supply |
| 21 | CLOCK | I²C clock input (SCL); 400 kHz max, 3V VIH threshold |
| 22 | VOUT6 | I²C-controllable high-side driver output (1A, RON ≤0.6Ω); lamp or motor drive |
| 23 | DATA | I²C data input/output (SDA); open-drain, 1V VIL threshold |
| 24 | VIN | Secondary input for high-side driver section; tied to main IN in standard config |
| 25 | ST-CAP | Capacitor connection for system reset timing; defines delay reset window |
Key Features
| Feature | Design Value |
|---|---|
| I²C-configurable outputs | VOUT3–VOUT5 offer 5–7 discrete voltage settings per rail; enables single-BOM flexibility across radio variants |
| Automotive transient robustness | Operates through 50V/50ms load dump and 27V jump-start without shutdown or regulation loss |
| Ultra-low standby consumption | 80–120 µA total quiescent current with all outputs enabled; meets ISO 8859-3 Class 3 requirements |
| Integrated battery monitoring | Four independent detection inputs (Det1–Det3, Det17) with resistor-adjustable thresholds and hysteresis |
| Dual reset architecture | Separate delay reset (ST-CAP) and hard reset (HRCAP) paths allow differentiated system recovery strategies |
| Thermally optimized packaging | Flexiwatt25 with exposed GND tab achieves Rth j-case = 1.3°C/W; supports 1A continuous HSD operation |
Applications
| Car Radio Mainboard | Tuner Module Power |
|---|---|
|
Use Scenario: Central power management unit on OEM car stereo mainboard supplying MCU, DSP, audio codec, and display controller. IC Role / Device Role / Timing Role: Primary multifunction regulator providing five independent, I²C-configurable rails and reset signaling. Use Value: Eliminates need for six discrete regulators and external I²C GPIO expanders; reduces BOM count by ≥12 components. |
Use Scenario: Dedicated power stage for analog FM/AM tuner IC requiring stable 8.3V at 250mA with fast enable/disable. IC Role / Device Role / Timing Role: Fixed-output regulator (VOUT2) with I²C-controlled ON/OFF switching for power gating. Use Value: Enables software-controlled tuner sleep/wake without external MOSFET or logic; <10 µs turn-on delay. |
| CD Mechanism Drive | DSP Audio Processing |
|
Use Scenario: Powering CD spindle motor driver and laser diode bias circuit requiring 5–7.3V at 400mA with thermal foldback. IC Role / Device Role / Timing Role: Adjustable linear regulator (VOUT4) with current limiting and thermal shutdown. Use Value: Supports multiple CD player models via I²C voltage selection; avoids redesign when changing motor specs. |
Use Scenario: Supplying 3.3V or 5V to digital signal processor and associated memory in premium audio head units. IC Role / Device Role / Timing Role: Programmable output (VOUT5) delivering 3.3–5V at 500mA with tight line/load regulation. Use Value: Allows same hardware platform to support both legacy 3.3V DSPs and newer 5V low-power cores. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multifunction automotive regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65136-Q1 | Single 5V + dual adjustable (1.2–5.5V) outputs; no high-side driver; I²C interface; smaller QFN package | Lacks battery detection, reset generation, and high-current HSD; suited for infotainment SoC power only | Select when system requires compact footprint and only needs three regulated rails without automotive monitoring features |
| MAX16922 | 3-output regulator (5V/3.3V/adjustable) + watchdog timer; SPI interface; 40V load-dump rating; no I²C or HSD | Missing I²C programmability, battery comparators, and high-side switch; targets simpler cluster displays | Choose for cost-sensitive instrument clusters where I²C configurability and HSD are unnecessary |
Compared with TPS65136-Q1 and MAX16922, the L5952 uniquely combines five I²C-programmable outputs, integrated high-side driver, four battery detectors, and automotive-grade transient immunity-making it irreplaceable for full-featured car radio power architectures requiring hardware-level flexibility and system supervision.
Availability
L5952 is available at Aetrix Electronics and suitable for automotive infotainment, OEM car radio production, and Tier-1 module development requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for L5952 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 vertical manufacturing capability.
The L5952 belongs to ST's automotive power management portfolio, engineered specifically for car radio and infotainment systems requiring integrated regulation, battery monitoring, and high-side drive in a single package.
FAQ
What is the maximum allowable input voltage for continuous operation?
The L5952 supports continuous DC input from 9 V to 16 V, with absolute maximum rating of 26 V. It remains fully operational during 27 V jump-start events (<1 minute) and 50 V/50 ms load-dump transients without regulation loss or latch-up, as verified in the Absolute Maximum Ratings table and Electrical Characteristics section.
How many I²C address bits are used, and what is the default address?
The L5952 uses a fixed 7-bit I²C slave address of 0x44 (1000100b), with LSB = 0 for write mode. No address pins are provided; the address is hardwired internally. Communication supports standard-mode (100 kHz) and fast-mode (400 kHz) clocks, with rise/fall times specified at ≤300 ns.
Can VOUT1 be disabled or adjusted via I²C?
No. VOUT1 is a fixed 5 V output with no I²C control - it powers the internal logic and is always active when VIN is present and within operating range. Its enable state is tied to the RESET signal and internal bandgap startup; voltage adjustment or software disable is not supported per the Output Voltage 1 specification table.
What is the purpose of the four BATT-DET pins, and how are they configured?
Det1–Det3 and Det17 are independent comparator inputs with distinct threshold ranges: Det1 (~7.3 V), Det2 (~4.65 V), Det3 (~8.35 V), and Det17 (~17 V). Each accepts external resistor dividers to set precise trip points; hysteresis (30–150 mV) prevents chatter. Pins 5, 8, 10, and 12–15 provide duplicated inputs for noise immunity or multi-sensor routing.
L5952 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 25-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Car Audio System
- Voltage - Input:
- 9V ~ 16V
- Number of Outputs:
- 6
- Voltage - Output:
- 5V, 8.3V, Adj
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 25-Flexiwatt (Vertical)
L5952 FAQ
1.How can I place an order for L5952 through Aetrix?
Please submit a Request for Quotation (RFQ) for L5952 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 L5952 reliable?
The price and inventory of L5952 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L5952 is usually 5 days.
3.What payment methods are accepted for L5952?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L5952 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L5952?
L5952 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L5952 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 L5952?
For technical support, including L5952 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L5952 requirements.
6.How does Aetrix verify that L5952 is sourced from the original manufacturer or authorized distributors?
All L5952 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 L5952 meets industry standards.
7.What is the process for return or replacement of L5952?
All L5952 units undergo pre-shipment inspection (PSI). If there is an issue with L5952, 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 L5952 part is unused and in its original packaging.
Return procedure for L5952:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
L5952 Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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.
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…
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…
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…
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 …
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…
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…
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…
