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

STMicroelectronics VN920D-B5

Name: VN920D-B5
Brand: STMicroelectronics
SKU: VN920D-B5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VN920D-B5

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: P2PAK (4 Leads + Tab)

Datasheet:: VN920D-B5.pdf

Description:: IC PWR DRIVER N-CHAN 1:1 P2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:4,053

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Product details

Overview

VN920D-B5 from STMicroelectronics is a monolithic high-side driver IC fabricated in VIPower M0-3 technology, designed to switch resistive, inductive, or capacitive loads with one side grounded. It delivers 30 A continuous output current, features 18 mΩ R_DS(on) at 25°C, supports 36 V V_CC, and integrates on/off-state open-load detection, short-circuit protection, and reverse-battery immunity - enabling robust load control in automotive body electronics and industrial power distribution.

For engineers reviewing the VN920D-B5 datasheet, VN920D-B5 pinout, VN920D-B5 application, or VN920D-B5 equivalent, key selection criteria include its P2PAK package thermal performance (R_thj-case = 1.3 °C/W), ISO7637-2 pulse compatibility, active current limiting (30–75 A), and diagnostic status pin behavior under overtemperature or undervoltage conditions.

Technical Context

The VN920D-B5 implements a CMOS-compatible input stage with 0.5 V hysteresis and clamping to 6.8 V, driving an integrated vertical power MOSFET with active current limitation and thermal shutdown (trip at 150–200 °C, reset at 135 °C). Its status pin provides open-drain diagnostic feedback for overtemperature, overvoltage (≥36 V), undervoltage (≤5.5 V), and open-load events.

Protection logic includes loss-of-ground detection via internal monitoring of GND pin continuity, off-state output short-to-V_CC detection using voltage thresholding (V_OL = 1.5–3.5 V), and demagnetization energy clamping (V_demag = V_CC − 41 to V_CC − 55 V) during inductive turn-off - all coordinated without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
R_DS(on)	18 mΩ @ I_OUT = 10 A, T_j = 25°C - enables low conduction loss and <1 W dissipation at 30 A
I_OUT Continuous	30 A - rated output current with thermal derating above 25°C case temperature
V_CC Operating Range	5.5–36 V - supports 12 V/24 V automotive and industrial supply rails
Open-Load Detection	On-state: 300–700 mA threshold; Off-state: 1.5–3.5 V threshold - enables diagnostics without external sense resistors
Current Limit	30–75 A (typ. 45 A) - adjustable via junction temperature and V_CC, prevents destructive fault currents
ISO7637-2 Pulse Immunity	Pulse 1 (−100 V), Pulse 2a (+100 V), Pulse 3a/b (±150 V) - meets automotive transient robustness requirements
Standby Current	3.5 µA @ V_CC = 13 V, T_j = 25°C - minimizes battery drain in always-on systems

Pinout & Package

The VN920D-B5 is housed in a thermally enhanced P2PAK surface-mount package with exposed drain pad for PCB heat sinking. Its 5-pin configuration optimizes power delivery and thermal management in high-current applications.

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Power supply input	Clamped to 41 V max; supplies internal logic and gate drive; connects to battery rail
OUTPUT	Main power output	Drains load current; internally connected to power MOSFET drain; requires external heatsinking
INPUT	Digital control input	CMOS-compatible (V_IL ≤ 1.25 V, V_IH ≥ 3.25 V); 0.5 V hysteresis prevents noise-induced switching
STATUS	Diagnostic open-drain output	Asserts low on faults (overtemp, overvoltage, open load); requires external pull-up resistor
GND	Ground reference	Monitored for disconnection; loss triggers automatic shutdown to prevent floating output

Key Features

Feature	Design Value
Reverse-battery protection	Operates safely with −0.3 V applied to V_CC; no external diode required per application schematic
Active current limitation	Dynamic trip point (30–75 A) scales with junction temperature and V_CC, avoiding fixed-threshold blind spots
Loss-of-ground detection	Automatic shutdown if GND pin disconnects - prevents uncontrolled output state during wiring faults
Off-state short-to-V_CC detection	Identifies output shorted to battery before enabling, preventing inadvertent activation during maintenance
Low standby current	3.5 µA typical ensures <10 µA system-level quiescent draw in sleep mode

Applications

Automotive Body Control Module (BCM)

Industrial Motor Starter Circuit

Use Scenario: Driving headlamps, fog lamps, or cooling fans in 12 V vehicle electrical architecture.

IC Role / Device Role / Timing Role: High-side switch controlling load power path; replaces electromechanical relays with faster, quieter, and more reliable solid-state operation.

Use Value: Integrated open-load diagnostics reduce need for external current sensing, lowering BOM count and PCB area by >30% versus discrete FET + controller solutions.

Use Scenario: Controlling 3-phase motor contactor coils or solenoid valves in factory automation panels.

IC Role / Device Role / Timing Role: Robust load driver with built-in short-circuit and thermal protection, eliminating need for fuse coordination and manual reset.

Use Value: 30 A rating and 18 mΩ R_DS(on) enable direct drive of 24 V DC coils up to 720 W without external heatsink in ambient ≤50°C.

Truck Trailer Lighting Interface

Commercial HVAC Blower Control

Use Scenario: Managing trailer stop/tail light loads subject to ISO16750-2 load dump transients and reverse-battery connection risk.

IC Role / Device Role / Timing Role: Fault-tolerant high-side driver with active V_CC clamp and reverse-polarity immunity.

Use Value: Withstands −0.3 V reverse battery and +100 V ISO7637-2 Pulse 2a without latch-up or damage - eliminates need for external TVS and series diode.

Use Scenario: Regulating multi-speed blower motors in rooftop HVAC units powered from 24 V DC backup supplies.

IC Role / Device Role / Timing Role: High-current switching element with diagnostic feedback for predictive maintenance via STATUS pin reporting.

Use Value: On/off-state open-load detection enables real-time wire-break verification, reducing field service calls by identifying open circuits before total system failure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STVN920DSO	SO-16L package; higher R_DS(on) (36 mΩ typ.); lower I_OUT (20 A continuous); 65 °C/W R_thj-amb	Better suited for space-constrained PCBs with moderate thermal budget; not for >25 A continuous loads	Select when board area is critical and peak current ≤20 A; verify SO-16L copper pour per Figure 26
Infineon BTS724G	Pg-TO263-7 package; 15 mΩ R_DS(on); 40 A rating; integrated watchdog timer and SPI interface	Requires microcontroller communication; adds functional safety layer but increases firmware complexity	Choose when ASIL-B compliance or programmable diagnostics are required; not drop-in compatible

Compared with VN920DSO, the VN920D-B5 offers 50% lower thermal resistance and 50% higher current capability in P2PAK, while the BTS724G trades simplicity for advanced digital control - making VN920D-B5 optimal for cost-sensitive, high-reliability analog-driven systems.

Availability

VN920D-B5 is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, commercial HVAC systems, and heavy-duty vehicle lighting requiring stable component supply across extended temperature and transient environments.

Supply support for VN920D-B5 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 power management, automotive ICs, and industrial control solutions.

The VN920D-B5 belongs to ST's VIPower™ high-side driver product line, engineered specifically for robust, self-protected load switching in harsh automotive and industrial environments where reliability, diagnostic capability, and transient immunity are mandatory.

FAQ

What is the maximum safe operating temperature for VN920D-B5?

The VN920D-B5 features internal thermal shutdown triggered at 150–200 °C junction temperature, with automatic restart after cooling to 135 °C. Its P2PAK package achieves R_thj-case = 1.3 °C/W, allowing 30 A operation at ≤50 °C case temperature with adequate heatsinking - exceeding AEC-Q100 Grade 1 requirements.

Does VN920D-B5 require an external flyback diode for inductive loads?

No - the VN920D-B5 integrates an active demagnetization clamp that limits V_OUT to V_CC − 41 V during inductive turn-off, eliminating need for external freewheeling diodes in most 12/24 V applications. This reduces component count and PCB footprint while maintaining controlled energy dissipation.

How does the STATUS pin behave during undervoltage conditions?

When V_CC drops below 3–5.5 V (under-voltage shutdown threshold), the STATUS pin asserts low to signal fault condition. The 0.5 V hysteresis prevents chatter near the trip point, and the pin remains low until V_CC rises above the hysteresis level - providing clean, debounced diagnostic signaling to MCU GPIO inputs.

Can VN920D-B5 drive loads directly connected to battery without additional protection?

Yes - the device includes active V_CC clamping (max 41 V), reverse-battery tolerance (−0.3 V), and ISO7637-2 transient immunity (Pulse 1/2a/3a/b), enabling direct battery connection in automotive applications. However, external TVS may still be recommended for Pulse 5a (load dump) in high-energy systems per ISO16750-2.

VN920D-B5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: P2PAK (4 Leads + Tab)

Series:: VIPower™

Packaging:: Tube

Product Status:: Obsolete

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 ~ 36V

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

Current - Output (Max):: 30A

Rds On (Typ):: 18mOhm (Max)

Input Type:: Non-Inverting

Features:: Auto Restart

Fault Protection:: Current Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: P2PAK

VN920D-B5 FAQ

1.How can I place an order for VN920D-B5 through Aetrix?

Please submit a Request for Quotation (RFQ) for VN920D-B5 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 VN920D-B5 reliable?

The price and inventory of VN920D-B5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VN920D-B5 is usually 5 days.

3.What payment methods are accepted for VN920D-B5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VN920D-B5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VN920D-B5?

VN920D-B5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VN920D-B5 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 VN920D-B5?

For technical support, including VN920D-B5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VN920D-B5 requirements.

6.How does Aetrix verify that VN920D-B5 is sourced from the original manufacturer or authorized distributors?

All VN920D-B5 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 VN920D-B5 meets industry standards.

7.What is the process for return or replacement of VN920D-B5?

All VN920D-B5 units undergo pre-shipment inspection (PSI). If there is an issue with VN920D-B5, 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 VN920D-B5 part is unused and in its original packaging.

Return procedure for VN920D-B5:

1.Submit a request within 90 days.

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

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