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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

STMicroelectronics VN31SPTR-E

Name: VN31SPTR-E
Brand: STMicroelectronics
SKU: VN31SPTR-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VN31SPTR-E

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: PowerSO-10 Exposed Bottom Pad

Datasheet:: VN31SPTR-E.pdf

Description:: IC PWR DRIVER N-CHAN 1:1 PWRSO10

Quantity:: RFQ Add To RFQ list

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Inventory:1,349

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Product details

Overview

VN31SPTR-E from STMicroelectronics is a high-side smart power solid-state relay built with VIPower M0-3 technology, designed for automotive-grade switching of resistive or inductive loads with one side grounded. It delivers 11.5 A nominal current at Tc = 85 °C, features 0.03 Ω RDS(on) at 25 °C, integrated thermal shutdown (140 °C), open-drain diagnostic output, and -18 V fast demagnetization for inductive loads - used in body control modules and lighting drivers.

For engineers reviewing the VN31SPTR-E datasheet, VN31SPTR-E pinout, VN31SPTR-E application, or VN31SPTR-E equivalent, key selection criteria include ISO-compliant nominal current definition, load-dump pulse 5 level II immunity (46.5 V), reverse battery protection interface options, and diagnostic timing parameters (tpovl = 5–10 µs, tpol = 50–700 µs).

Technical Context

The VN31SPTR-E integrates a vertical Power MOSFET with embedded protection logic and diagnostics in a single PowerSO-10 package. Its high-side architecture enables direct battery-switching without load grounding constraints, while internal clamping and fast demag (-18 V) suppress inductive kickback energy during turn-off.

Protection functions operate autonomously: under-voltage lockout triggers at 5 V, overcurrent detection responds within microseconds for short-circuit events, and thermal shutdown activates at 140 °C with automatic reset at 125 °C - all compliant with ISO 7637-2 Pulse 5 Level II and ISO 16750-2 requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	60 V - Maximum drain-source breakdown voltage; supports 13 V nominal battery systems with margin for load dump transients up to 46.5 V.
R_DS(on)	0.03 Ω (typ.) at T_j = 25 °C - Enables low conduction loss (≤0.4 W at 11.5 A), reducing heatsink requirements in space-constrained modules.
I_NOM	11.5 A - ISO-defined nominal current at T_c = 85 °C and V_CC = 13 V with V_DS ≤ 0.5 V; defines safe continuous operation point.
I_MAX	31 A - Maximum continuous output current at T_c = 85 °C without self-protection activation; validated for 13 V battery conditions.
V_DEMAG	-18 V (typ.) - Negative clamp voltage during inductive turn-off; reduces demag energy dissipation by ~4× vs. standard freewheeling diodes.
t_POVL/t_POL	5–10 µs / 50–700 µs - Diagnostic delay times for overtemperature and open-load faults; meets ISO 16750-2 fault reporting timing windows.
V_IL/V_IH	0.8 V / 2 V - Logic-compatible input thresholds; interfaces directly with 5 V microcontrollers without level-shifting.

Pinout & Package

Package: PowerSO-10 (exposed die pad, thermally enhanced), 9.4 × 9.3 mm footprint, R_thj-case = 1.2 °C/W max when mounted on FR-4 with minimum recommended copper pad.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN)	Logic Input	CMOS-compatible control signal; accepts 0.8 V low / 2 V high; internally clamped to 6 V.
2 (GND)	Power Ground Reference	Return path for load current and internal circuitry; separate from signal ground in reverse-battery protection configurations.
3 (V_CC)	Battery Supply Input	Accepts 5.5–26 V; includes undervoltage lockout at 5 V and withstands ISO 7637-2 Pulse 5 Level II (46.5 V).
4–9 (OUT)	Power Output Terminals	Parallel-connected source terminals delivering up to 31 A; bonded to exposed die pad for thermal conduction.
10 (STAT)	Open-Drain Diagnostic Output	Active-low status: indicates open load (off-state), short-to-V_CC, or overtemperature; requires external pull-up.

Key Features

Feature	Design Value
Integrated Fast Demagnetization	Clamps inductive flyback to -18 V (typ.), reducing demag energy dissipation by >75% versus standard diode recovery.
ISO-Compliant Diagnostic Timing	Meets ISO 16750-2 open-load filtering (t_1(on)/t_1(off) = 1–10 ms) and fault reporting delays (t_pol, t_povl).
Load-Dump Immunity	Withstands ISO 7637-2 Test Pulse 5 Level II (46.5 V) without external components - simplifies ECU front-end design.
Reverse Battery Protection Ready	Supports Schottky diode-based reverse polarity protection (e.g., 1N5822) with defined V_f impact on input thresholds and UVLO.
Thermal Self-Protection	Shuts down at 140 °C junction temperature and auto-restarts at 125 °C - no external thermal sensor or reset required.

Applications

Body Control Module Outputs

Automotive Lighting Drivers

Use Scenario: Switching door locks, window lifts, and seat adjusters in modern BCMs.

IC Role / Device Role / Timing Role: High-side load switch with real-time open-load and overtemperature diagnostics per channel.

Use Value: Eliminates need for discrete sense resistors and comparators; diagnostic output directly interfaces with MCU GPIOs for fault logging.

Use Scenario: Driving halogen and LED headlamps, fog lamps, and interior lighting.

IC Role / Device Role / Timing Role: High-current, high-voltage tolerant switch with fast demag for lamp filament surge suppression.

Use Value: Prevents contact arcing and extends lamp life via controlled inductive energy recovery at -18 V.

Engine Bay Solenoid Control

Heating/Ventilation Actuators

Use Scenario: Controlling fuel injectors, purge valves, and turbocharger actuators in harsh engine bay environments.

IC Role / Device Role / Timing Role: Robust high-side driver with load-dump immunity and thermal resilience up to 150 °C junction.

Use Value: Survives repeated ISO 7637-2 Pulse 5 exposure and maintains functionality during extended 125 °C ambient operation.

Use Scenario: Managing HVAC blend doors, heater core valves, and blower motor relays.

IC Role / Device Role / Timing Role: Low-R_DS(on) switch enabling compact PCB layout and minimal thermal derating in sealed enclosures.

Use Value: 0.03 Ω R_DS(on) limits conduction loss to <0.4 W at 11.5 A, avoiding forced-air cooling in dashboard modules.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side automotive switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
VN5E025AJTR-E	Lower I_NOM (2.5 A), smaller PowerSSO-12 package, integrated current sensing (0.5 mV/mA)	Suitable for low-power solenoids and sensors; lacks -18 V demag and Pulse 5 Level II immunity	Select when precise current monitoring is required and peak load current ≤2.5 A.
TPS27082LDR	Lower R_DS(on) (12 mΩ), 2.5 A rating, no integrated demag, no open-load detection in off-state	Targeted at industrial PLC outputs; not qualified for automotive transients or ISO diagnostics	Choose only for non-automotive 24 V systems requiring ultra-low on-resistance and no diagnostic reporting.

Compared with VN5E025AJTR-E and TPS27082LDR, the VN31SPTR-E uniquely combines 11.5 A nominal current, -18 V fast demag, ISO-compliant diagnostics, and Pulse 5 Level II immunity - making it the only option for high-power automotive body electronics requiring full functional safety-aware fault reporting.

Availability

VN31SPTR-E is available at Aetrix Electronics and suitable for automotive body control modules, lighting drivers, and engine bay solenoid control requiring stable component supply across extended temperature ranges and transient-heavy environments.

Supply support for VN31SPTR-E 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 capabilities.

The VN31SPTR-E belongs to ST's VIPower high-side switch product line, engineered specifically for ISO-compliant automotive load switching with integrated diagnostics, thermal protection, and robustness against battery transients.

FAQ

What is the maximum continuous output current for VN31SPTR-E and under what conditions is it specified?

The VN31SPTR-E supports 31 A maximum continuous output current at case temperature T_c = 85 °C with V_CC = 13 V, provided self-protection circuits (thermal, overcurrent) remain inactive. This rating assumes proper PCB thermal design using the recommended PowerSO-10 copper pad area and ambient airflow per ST's AN4429 guidelines.

How does the open-drain STAT pin indicate different fault conditions?

The STAT pin is active-low and reports three distinct states: high impedance (open load in off-state), low (short-to-V_CC or overtemperature), or low with specific timing delays (tpovl for overtemp, tpol for open load). The truth table in ST's datasheet Rev 2, page 6, confirms that STAT goes low immediately upon overtemperature but applies 5–10 ms filtering for open-load detection in on-state.

Can VN31SPTR-E be used without external components for reverse battery protection?

No - reverse battery protection requires an external Schottky diode (e.g., 1N5822) between the GND pin and chassis ground. Without it, -26 V reverse voltage exceeds the -4 V absolute maximum rating. ST provides two implementation options: one with shifted input thresholds (using diode drop), and another with isolated signal ground (pin 6 referenced) to preserve native logic levels.

What is the significance of the -18 V demagnetization voltage during inductive load turn-off?

The -18 V (typ.) clamp voltage accelerates current decay in inductive loads by increasing the di/dt during turn-off, reducing demagnetization time and total energy dissipated in the switch. As shown in ST's application note AN4429, this lowers P_dem by ~4× compared to standard 0.7 V diode recovery, directly extending device lifetime in high-cycle solenoid applications.

VN31SPTR-E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: PowerSO-10 Exposed Bottom Pad

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Switch Type:: General Purpose

Number of Outputs:: 1

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: N-Channel

Interface:: On/Off

Voltage - Load:: 5.5V ~ 26V

Voltage - Supply (Vcc/Vdd):: Not Required

Current - Output (Max):: 31A

Rds On (Typ):: 30mOhm (Max)

Input Type:: Non-Inverting

Features:: Status Flag

Fault Protection:: Open Load Detect, Over Temperature

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-PowerSO

VN31SPTR-E FAQ

1.How can I place an order for VN31SPTR-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VN31SPTR-E 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 VN31SPTR-E reliable?

The price and inventory of VN31SPTR-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN31SPTR-E is usually 5 days.

3.What payment methods are accepted for VN31SPTR-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN31SPTR-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN31SPTR-E?

VN31SPTR-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN31SPTR-E 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 VN31SPTR-E?

For technical support, including VN31SPTR-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN31SPTR-E requirements.

6.How does Aetrix verify that VN31SPTR-E is sourced from the original manufacturer or authorized distributors?

All VN31SPTR-E 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 VN31SPTR-E meets industry standards.

7.What is the process for return or replacement of VN31SPTR-E?

All VN31SPTR-E units undergo pre-shipment inspection (PSI). If there is an issue with VN31SPTR-E, 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 VN31SPTR-E part is unused and in its original packaging.

Return procedure for VN31SPTR-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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