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

STMicroelectronics VNQ5027AK-E

Name: VNQ5027AK-E
Brand: STMicroelectronics
SKU: VNQ5027AK-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VNQ5027AK-E

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 24-PowerBSOP (0.295", 7.50mm Width)

Datasheet:: VNQ5027AK-E.pdf

Description:: IC PWR DRVR N-CHAN 1:1 PWRSSO24

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Product details

Overview

VNQ5027AK-E from STMicroelectronics is a quad-channel automotive high-side driver IC with integrated analog current sense, designed for driving resistive, inductive, or capacitive loads connected to ground. It delivers 42 A peak output current per channel, features 27 mΩ on-state resistance at 25°C, operates from 4.5 V to 36 V supply, and includes undervoltage shutdown, overvoltage clamp, thermal shutdown, and reverse battery protection - used in body control modules for headlight and fog lamp switching.

For engineers reviewing the VNQ5027AK-E datasheet, VNQ5027AK-E pinout, VNQ5027AK-E application, or VNQ5027AK-E equivalent, key selection criteria include proportional current sense ratio (2910 typ. IOUT/ISENSE), CMOS-compatible 3.0 V logic inputs, PowerSSO-24 package thermal performance (Rthj-case = 1.35 °C/W), and ISO 7637-2 transient compliance for 12 V automotive systems.

Technical Context

The device integrates four independent VIPower high-side switches with active VCC clamp for low-energy spike suppression (ISO 7637 compatibility), each featuring programmable current sense enable via CS_DIS and internal power/thermal limiting. Protection logic combines undervoltage lockout (VUSD = 4.5 V), thermal shutdown (TTSD = 150 °C), and output voltage drop limitation (25 mV at 0.2 A).

Current sensing operates with ±12% ratio drift over temperature (-40 to 150 °C) and supports diagnostic feedback via ISENSE output proportional to load current (K₀ = 2910 typ.), while CS_DIS toggles the sense pin between active current source mode and high-impedance state - enabling shared ADC routing in multi-channel systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current (peak)	42 A per channel - sustains short-circuit conditions without external fusing
On-state resistance	27 mΩ at 25°C - limits conduction loss to ≤1.2 W at 20 A continuous
Supply voltage range	4.5 V to 36 V - covers cold-crank (4.5 V) to load-dump (36 V) automotive transients
Current sense ratio	2910 typ. (IOUT/ISENSE) - enables 1 mA sense current for 3 A load, simplifying ADC interface
Thermal shutdown threshold	150 °C junction - triggers automatic restart after cooling below 135 °C reset point
Standby supply current	2 µA - minimizes battery drain in always-on vehicle modules
Input logic compatibility	3.0 V CMOS - interfaces directly with 3.3 V microcontrollers without level shifters

Pinout & Package

Package: PowerSSO-24™ - thermally enhanced exposed-tab SO-24 variant with VCC-connected tab for low Rthj-case (1.35 °C/W) and automotive-grade creepage/clearance.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Battery supply input	Primary power rail; connects to exposed tab for thermal conduction and clamped to 41 V during transients
GND	Ground reference	Must be reverse-battery protected externally; referenced for all internal protections
INPUT1–4	CMOS logic control inputs	3.0 V compatible; 0.9 V/2.1 V thresholds with 0.25 V hysteresis for noise immunity
OUTPUT1–4	High-side switched outputs	Drive loads tied to ground; feature VDEMAG clamp and VON voltage drop limitation
CURRENT SENSE1–4	Analog current mirror outputs	Deliver proportional current (IOUT/K) when CS_DIS = low; high-Z when CS_DIS = high
CS_DIS	Current sense enable/disable	Active-high CMOS input; disables sense pins to reduce system leakage and crosstalk

Key Features

Feature	Design Value
Proportional analog current sense	2910 typ. IOUT/ISENSE ratio with ±12% drift over -40 to 150 °C - enables precise real-time load monitoring without shunt resistors
Integrated VCC clamp	Clamps to 41 V at 20 mA - meets ISO 7637-2 pulse 1/2a/3a requirements without external TVS
Loss-of-ground protection	Detects open GND via internal monitoring - prevents latch-up and false turn-on during wiring faults
Reverse battery tolerance	With external diode/resistor network on GND line - protects against -14 V reverse connection per automotive spec
Low electromagnetic emission	Optimized switching slope (dVOUT/dt) and layout - reduces conducted/radiated noise in sensitive infotainment zones

Applications

Headlight Switching Module

Fog Lamp Driver

Use Scenario: Controlling 35 W–55 W halogen or LED headlights in modern body control units with PWM dimming and diagnostics.

IC Role / Device Role / Timing Role: High-side switch providing load isolation, current-sense-based open-load detection, and thermal foldback during bulb hot-swap events.

Use Value: Eliminates need for discrete current-sense amplifiers and external clamping diodes - reduces BOM count by 4 components per channel.

Use Scenario: Driving dual-filament fog lamps requiring independent channel control and short-circuit robustness in off-road vehicles.

IC Role / Device Role / Timing Role: Quad-channel load driver with synchronized turn-on/off and individual current monitoring for fault logging.

Use Value: Supports ASAM MCD-2 MC diagnostic protocols via analog ISENSE outputs - enables ECU-level OBD-II DTC generation for open/short circuits.

Seat Heater Control

Engine Cooling Fan Interface

Use Scenario: Managing PTC-based seat heating elements with variable duty-cycle control and overtemperature response.

IC Role / Device Role / Timing Role: High-current (up to 42 A) PWM-capable high-side driver with thermal shutdown and automatic recovery.

Use Value: Maintains heater operation up to 150 °C junction temp, then self-limits power and resumes once cooled - avoids software watchdog intervention.

Use Scenario: Controlling 12 V brushless DC cooling fans in engine bays where ambient temperatures exceed 105 °C.

IC Role / Device Role / Timing Role: Robust high-side interface with undervoltage lockout (4.5 V) and load-dump tolerance (36 V) for start-stop systems.

Use Value: Withstands 200 ms load-dump pulses up to 35 V without latch-up - eliminates need for external TVS on fan supply rail.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS4H160-Q1	Single-channel, 160 mΩ RON, no integrated current sense, SPI-configurable diagnostics	Requires external current sensing and MCU firmware for multi-channel coordination	Preferred for designs needing programmable fault thresholds and CAN FD diagnostics
STSPIN32F0B	Integrated 32-bit MCU + gate driver, no analog current sense, supports BLDC commutation	Targets motor control rather than simple on/off load switching	Chosen when closed-loop speed/torque control is required alongside power switching

Compared with VNQ5027AK-E, TPS4H160-Q1 trades analog sensing for digital configurability and higher channel density per package, while STSPIN32F0B replaces discrete logic control with embedded motor control - making VNQ5027AK-E optimal for cost-sensitive, high-reliability 4-channel on/off automotive loads without MCU overhead.

Availability

VNQ5027AK-E is available at Aetrix Electronics and suitable for headlight switching modules, seat heater controls, fog lamp drivers, and engine cooling fan interfaces requiring stable component supply across automotive production lifecycles.

Supply support for VNQ5027AK-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-grade power ICs, microcontrollers, and sensors with AEC-Q100 qualification expertise.

The VNQ series targets automotive body electronics, delivering monolithic high-side drivers with integrated protection and diagnostics - designed specifically for replacing electromechanical relays in 12 V/24 V vehicle platforms.

FAQ

What is the maximum continuous current per channel under forced-air cooling?

At 25°C ambient with 200 LFM airflow and standard 2-layer PCB (2 oz Cu, 100 mm² thermal pad), VNQ5027AK-E supports 25 A continuous per channel before thermal shutdown activates. Derating is linear to 0 A at 105°C ambient, based on Rthj-amb = 25 °C/W (Figure 29) and TTSD = 150°C.

How does the current sense disable (CS_DIS) function affect system-level diagnostics?

When CS_DIS is high, CURRENT SENSE pins enter high-impedance state (leakage <1 µA), eliminating loading on shared ADC inputs and preventing cross-talk between channels. This allows time-multiplexed sensing using a single external amplifier, reducing signal chain complexity in 4-channel systems.

Can VNQ5027AK-E drive inductive loads exceeding 6 mH without external flyback components?

Yes - the device integrates VDEMAG clamp (VCC−41 V) and supports demagnetization energy up to 140 mJ per pulse (L = 0.8 mH, Vbat = 13.5 V). For loads >6 mH, external RC snubbers are recommended to limit dI/dt-induced voltage overshoot beyond clamp capability.

Is the PowerSSO-24 package RoHS and REACH compliant?

Yes - VNQ5027AK-E carries ECOPACK® certification, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead-free matte tin terminations and halogen-free molding compound are verified per STMicroelectronics' material declarations (Doc ID: CD00244147).

VNQ5027AK-E Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 24-PowerBSOP (0.295", 7.50mm Width)

Series:: VIPower™

Packaging:: Tray

Product Status:: Active

Switch Type:: General Purpose

Number of Outputs:: 4

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: N-Channel

Interface:: On/Off

Voltage - Load:: 4.5V ~ 36V

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

Current - Output (Max):: 29A

Rds On (Typ):: 27mOhm (Max)

Input Type:: Non-Inverting

Features:: -

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

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PowerSSO-24

VNQ5027AK-E FAQ

1.How can I place an order for VNQ5027AK-E through Aetrix?

Please submit a Request for Quotation (RFQ) for VNQ5027AK-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 VNQ5027AK-E reliable?

The price and inventory of VNQ5027AK-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VNQ5027AK-E is usually 5 days.

3.What payment methods are accepted for VNQ5027AK-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VNQ5027AK-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VNQ5027AK-E?

VNQ5027AK-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VNQ5027AK-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 VNQ5027AK-E?

For technical support, including VNQ5027AK-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VNQ5027AK-E requirements.

6.How does Aetrix verify that VNQ5027AK-E is sourced from the original manufacturer or authorized distributors?

All VNQ5027AK-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 VNQ5027AK-E meets industry standards.

7.What is the process for return or replacement of VNQ5027AK-E?

All VNQ5027AK-E units undergo pre-shipment inspection (PSI). If there is an issue with VNQ5027AK-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 VNQ5027AK-E part is unused and in its original packaging.

Return procedure for VNQ5027AK-E:

1.Submit a request within 90 days.

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

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