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HomeProductsIntegrated Circuits (ICs)PMIC - Power Distribution Switches, Load DriversVN7040AJ-E
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VN7040AJ-E - STMicroelectronics

Manufacturer Part Number
VN7040AJ-E
Manufacturer
STMicroelectronics
Allelco Part Number
98D-VN7040AJ-E
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
11,511 pcs available, New & Original
Parts Description
IC PWR DRVR N-CHAN 1:1 PWRSSO16
Package
PowerSSO-16
Data sheet
VN7040AJ-E.pdf

PCN Part Status Change

VNYYY 21/Dec/2016.pdf

PCN Assembly/Origin

APG/15/9126 23/Mar/2015.pdf
RoHs Status
ROHS3 Compliant
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In stock: 11511

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Specifications

VN7040AJ-E Tech Specifications
STMicroelectronics - VN7040AJ-E technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - VN7040AJ-E

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Supply (Vcc/Vdd) Not Required
Voltage - Load 4V ~ 28V
Switch Type General Purpose
Supplier Device Package PowerSSO-16
Series VIPower™
Rds On (Typ) 40mOhm
Ratio - Input:Output 1:1
Package / Case 16-PowerLFSOP (0.154", 3.90mm Width)
Package Tube
Output Type N-Channel
Product Attribute Attribute Value
Output Configuration High Side
Operating Temperature -40°C ~ 150°C (TJ)
Number of Outputs 1
Mounting Type Surface Mount
Interface On/Off
Input Type Non-Inverting
Features Auto Restart, Status Flag
Fault Protection Current Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage, UVLO
Current - Output (Max) 24A
Base Product Number VN7040

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

What are the key thermal and electrical limitations of the VN7040AJ-E that influence its use in high-current automotive applications?
The VN7040AJ-E is rated for a continuous output current of 24A with an on-resistance (Rds(on)) of 40mΩ at typical conditions, resulting in significant power dissipation under load. For instance, at 24A, conduction losses approximate 23W (I² × R = 576 × 0.04), necessitating careful thermal management. Operating junction temperature spans from -40°C to +150°C, but sustained operation near this limit requires derating based on PCB copper area and airflow. Its voltage range of 4V to 28V supports standard automotive systems, but transient robustness must be evaluated against ISO 7637-2 pulses, especially given its built-in overvoltage protection.
How does the VN7040AJ-E compare to the VN7040AJTR in terms of package and performance suitability for space-constrained designs?
Both the VN7040AJ-E and VN7040AJTR share identical electrical characteristics, including 24A peak current capability and 40mΩ Rds(on), but differ in packaging. The VN7040AJ-E uses the PowerSSO-16 (16-PowerLFSOP) package, which offers improved thermal performance and smaller footprint compared to older variants. This makes the VN7040AJ-E more suitable for compact automotive modules where board real estate is limited and heat dissipation is critical. Designers should verify layout compatibility due to pinout consistency, ensuring no signal integrity or thermal interference between adjacent components.
Can the VN7040AJ-E safely drive inductive loads such as motors or solenoids without external protection circuitry?
While the VN7040AJ-E includes robust internal protections like open-load detection and overcurrent limiting, driving inductive loads demands additional consideration. The device lacks integrated freewheeling diodes, so back-EMF generated by inductive switching can exceed its voltage tolerance unless suppressed externally. A Schottky diode or TVS array across the load terminals is strongly recommended. Additionally, the auto-restart feature may repeatedly engage during fault conditions if inductive kickback triggers false overcurrent flags, potentially causing thermal stress—designers must balance responsiveness with reliability in dynamic environments.
What role does the status flag pin play in diagnosing faults during system integration with the VN7040AJ-E?
The status flag provides a diagnostic output indicating active fault conditions such as overtemperature, undervoltage lockout (UVLO), overvoltage, or current overload. When asserted low, it signals microcontroller intervention without interrupting primary control logic. However, interpreting this signal requires understanding response thresholds: for example, UVLO typically activates below 6V, while overtemperature shutdown occurs around 175°C junction temperature. This feedback enables predictive maintenance strategies in automotive body control modules but should not replace hardware-level safeguards like fuses or current-sense resistors.
Is the VN7040AJ-E compatible with 3.3V logic levels commonly used in modern ECUs?
Yes, the VN7040AJ-E accepts a non-inverting input interface compatible with 3.3V logic, making it suitable for direct connection to microcontrollers. The threshold voltages for logic-high and logic-low states are designed to align with standard TTL/CMOS families, reducing the need for level-shifting components. Nevertheless, noise margins should be verified under worst-case supply conditions—especially near the 4V minimum operating voltage—to ensure reliable turn-on/off transitions during cold cranking or voltage dips in vehicle power networks.
How does the VN7040AJ-E’s current-limiting mechanism behave during short-circuit events compared to gradual overloads?
The VN7040AJ-E employs fixed current limiting rather than adjustable foldback, clamping output current to approximately 35–40A during sustained short circuits. Unlike some smart drivers that reduce current proportionally to voltage drop, this fixed threshold ensures consistent protection but increases instantaneous power dissipation. In practice, a 1-second short-circuit event could elevate die temperature by ~80°C above ambient depending on duty cycle and heatsinking. Engineers must assess whether this meets system-level thermal budgets, particularly in confined enclosures like door control units.
Why might someone choose the VN7040AJ-E over discrete MOSFET solutions when designing a high-side switch for a 24V lighting system?
Integrating the VN7040AJ-E eliminates gate-drive complexity, reduces component count, and simplifies PCB routing compared to discrete N-channel configurations requiring bootstrap circuits or charge pumps. Its monolithic structure also guarantees matched thermal behavior between switch and driver, minimizing mismatch-induced failures. With Rds(on) of only 40mΩ, conduction losses drop significantly versus typical discrete pairs using 80mΩ+ combined resistance, improving efficiency by several percentage points in continuous 20A+ applications such as LED matrix control or relay replacement.
Are there any known substitution risks when replacing legacy VN7040-based designs with the VN7040AJ-E?
Although the VN7040AJ-E is listed as a substitute for the VN7040AJTR, layout parasitics may shift slightly due to package geometry differences in PowerSSO-16 versus previous SO-16 forms. Thermal impedance is lower in the newer package, enhancing reliability but possibly altering transient response if existing traces were optimized for higher thermal resistance. Additionally, ensure firmware accommodates the same fault reporting behavior; no functional changes are expected, but validation testing under extreme conditions remains advisable for safety-critical systems.
How does moisture sensitivity affect storage and handling of the VN7040AJ-E in mass production environments?
Classified as MSL 3, the VN7040AJ-E has a floor life of 168 hours (7 days) after opening before mandatory baking is required. This aligns with IPC/JEDEC J-STD-033 standards for lead-free soldering processes. Production lines must track time-to-reflow accurately, especially in humid climates, to prevent popcorn cracking during reflow. Using dry-pack bags with desiccants and humidity indicators minimizes risk, ensuring long-term solder joint integrity in harsh automotive environments where thermal cycling accelerates latent defects.
Does the VN7040AJ-E support hot-swapping applications such as plugging in diagnostic tools mid-operation?
Hot-swappability is not guaranteed due to lack of soft-start circuitry and reliance on external load characteristics. Sudden insertion into live circuits can trigger overcurrent or overvoltage faults if the load presents high capacitance or inrush currents exceeding 24A. While internal protections mitigate damage, repeated hot-plug cycles increase stress on bond wires and substrate layers. For true hot-swap compliance, designers should add series resistors, pre-charge circuits, or dedicated hot-swap controllers upstream of the VN7040AJ-E to dampen transients.
What impact does PCB trace inductance have on switching performance when using the VN7040AJ-E in pulsed applications?
High parasitic inductance in power loops amplifies voltage spikes during rapid turn-off, potentially exceeding the 28V absolute maximum rating even within the 4–28V operational window. At 24A and 100kHz switching, di/dt can reach 2.4×10⁶ A/s, inducing hundreds of millivolts across trace inductance. Minimizing loop area using wide, parallel planes and placing bypass capacitors close to the device mitigates ringing and improves EMI performance, preserving both component longevity and system compliance with CISPR 25.
How does the VN7040AJ-E’s auto-restart feature affect system recovery after a sustained fault condition?
After detecting an overtemperature or overcurrent event, the VN7040AJ-E enters a hiccup-mode auto-restart, attempting periodic reactivation every few hundred milliseconds. If the fault persists, it cycles off and on until resolved. This prevents catastrophic failure but risks repeated stress on semiconductor layers if the root cause isn’t addressed—for example, a stuck relay drawing continuous overload. System software should monitor the status flag to log faults and disable outputs permanently upon recurring issues, avoiding unintended automatic re-enabling in mission-critical functions.
Can the VN7040AJ-E be paralleled to increase current capacity in high-power actuator drives?
Paralleling is generally discouraged without current-sharing mechanisms due to slight variations in Rds(on) and thermal coupling. Mismatches can cause one device to carry disproportionate current, leading to localized heating and premature failure. If necessary, use ballast resistors or active current-balancing techniques, but these add cost and complexity. Given the device’s 24A limit and compact footprint, integrating multiple VIPOWER™ stages in separate channels often proves more effective than paralleling single devices for scalable power delivery.
What considerations apply when selecting heatsinking or copper pour area for the VN7040AJ-E in a sealed enclosure?
Without forced airflow, natural convection limits heat transfer; thus, adequate copper pours (≥4 oz Cu, 50mm² minimum) and thermal vias under the exposed pad are essential. Assuming 20A continuous load and 40mΩ Rds(on), steady-state power loss is ~16W, raising case temperature by roughly 60–80°C above ambient depending on layout. In sealed modules, this necessitates derating current or accepting reduced MTBF. Monitoring junction temperature via thermal modeling tools ensures operation stays within the 150°C maximum for long-term reliability.
How does the VN7040AJ-E comply with automotive EMC requirements despite lacking built-in filtering?
As a power switch, the device itself doesn’t generate emissions but must survive conducted and radiated disturbances per ISO 11452-4. Proper layout—short drain-source loops, common ground planes, and proximity to input capacitors—reduces susceptibility. Output side should include RC snubbers or ferrite beads if driving noisy loads. Input filtering with bulk capacitance and TVS diodes suppresses transients from ignition coils or alternators, aligning with functional safety standards like ISO 26262 by preventing latch-up or erratic switching during surge events.
What documentation should engineers consult beyond the datasheet when qualifying the VN7040AJ-E for production?
Beyond the datasheet, review STMicroelectronics application notes such as AN5127 on VIPOWER™ thermal design, AN4197 for fault diagnostics, and qualification reports referencing AEC-Q100 Grade 1 certification. These provide accelerated life test data, failure mode analysis, and layout examples validated in real-world automotive deployments. Cross-reference with IATF 16949 process guidelines to ensure manufacturing controls meet quality expectations, especially for traceability, conformal coating compatibility, and solder paste inspection criteria affecting joint reliability under vibration.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics VN7040AJ-E

Product Attribute VN7040AJTR-E VN7020AJTR-E VN7040ASTR-E VN7050AJTR-E
Part Number VN7040AJTR-E VN7020AJTR-E VN7040ASTR-E VN7050AJTR-E
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Switch Type - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output Configuration - - - -
Voltage - Supply (Vcc/Vdd) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Ratio - Input:Output - - - -
Current - Output (Max) - - - -
Input Type - - - Differential
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Load - - - -
Interface - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Fault Protection - - - -
Number of Outputs - - - -
Features - - - Simultaneous Sampling
Rds On (Typ) - - - -

VN7040AJ-E Datasheet PDF

Download VN7040AJ-E pdf datasheets and STMicroelectronics documentation for VN7040AJ-E - STMicroelectronics.

PCN Part Status Change
VNYYY 21/Dec/2016.pdf
PCN Assembly/Origin
APG/15/9126 23/Mar/2015.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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STMicroelectronics

VN7040AJ-E

STMicroelectronics
98D-VN7040AJ-E

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