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Diodes Incorporated ZXMS81045SPQ-13
- Part No.:
- ZXMS81045SPQ-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ZXMS81045SPQ-13.pdf
- Description:
- HIGH SIDE INTELLIFET SO-8EP T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
ZXMS81045SPQ from Diodes Incorporated is a single-channel, high-side power switch IC featuring integrated N-channel vertical MOSFET, charge-pumped gate drive, temperature/current sensing, and diagnostic feedback. It operates from 5–28V supply, delivers 4A nominal load current with 90mΩ RDS(ON) at 150°C, and provides proportional analog current-sense output (KILIS = 1200) for real-time load monitoring in automotive body control modules.
For engineers reviewing the ZXMS81045SPQ datasheet, ZXMS81045SPQ pinout, ZXMS81045SPQ application, or ZXMS81045SPQ equivalent, this device supports AEC-Q100-compliant high-side switching with open-load detection, overtemperature auto-restart, load-dump protection up to 41V, and logic-level enable (3.3V/5V compatible), making it suitable for replacing relays in 12V grounded-load systems.
Technical Context
The ZXMS81045SPQ integrates a monolithic N-channel vertical power MOSFET with on-die temperature and current sensors, enabling closed-loop protection without external components. Its charge-pumped gate driver sustains full conduction down to 5V supply while maintaining <0.5µA standby current in OFF state.
Diagnostic functionality includes a proportional IS pin output (linear 1200× scaling), fault signaling for overload/short-circuit/overtemperature/open-load, and dual-mode open-load detection-using current sense in ON state and output voltage threshold (3.5–4.5V) in OFF state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5–28V nominal; supports automotive battery transients up to 41V (ISO 7637 load dump) |
| RDS(ON) @ 150°C | 90mΩ max; enables 4A continuous operation with <1.6W power dissipation at 85°C ambient |
| Load Current Limit | 25A min at VDS = 5V; provides robust short-circuit protection with dynamic thermal cycling |
| Current Sense Ratio | KILIS = 1200 ±23% (50mA–4A range); maintains accuracy at low loads via voltage-drop regulation |
| Standby Current | 0.5µA max @ 25°C; reduces system quiescent power in sleep mode for always-on automotive ECUs |
| Undervoltage Threshold | 3.3V typ shutdown / 4.2V typ restart; prevents erratic switching during cold-cranking or brownout |
| Switching Times | tON = 90µs typ, tOFF = 170µs typ; optimized for EMC compliance in noisy vehicle environments |
Pinout & Package
Package: SO-8EP (Type E) with exposed heatsink pad (EP) for enhanced thermal performance; RoHS-compliant, halogen-free, AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference and thermal path | Primary return for internal circuitry; must be connected to PCB ground plane for loss-of-ground protection |
| 2 IN | Logic enable input | Active-high 3.3V/5V-compatible control; drives internal gate driver when pulled high |
| 3 DEN | Diagnostic enable | Allows shared IS bus across multiple devices; pulls IS high-impedance when low |
| 4 IS | Analog current-sense output | Outputs IOUT/1200 under normal operation; switches to 6–35mA fault current during overload/OT/open-load |
| 5 NC | No connection | Internal die pad; must remain unconnected per design |
| 6,7,8 OUT | High-side power output | Internally paralleled pins deliver load current to 12V grounded loads; connects directly to load |
| EP VS | Power supply input | Exposed pad serves as primary VS connection; requires soldered thermal pad for RθJC = 5.2K/W |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-dependent current limiting | Adjusts trip point from 25A @ 5V to 16A @ 28V, preventing thermal runaway during wide-input transients |
| Open-load detection (dual-mode) | Detects disconnected loads using IS current in ON state and VOUT > 3.5V in OFF state-no external comparator needed |
| Active output clamp (VDS(AZ)) | Clamps inductive kickback to 47V typ, eliminating need for external TVS diodes in motor/lamp drivers |
| Loss-of-ground protection | Automatically disables output if GND pin disconnects, preventing uncontrolled load activation in wiring faults |
| Charge-pumped gate drive | Maintains full RDS(ON) performance down to 5V supply, unlike bootstrap-based alternatives requiring ≥8V |
Applications
| Automotive Body Control | Industrial Load Management |
|---|---|
|
Use Scenario: Controlling headlamp, fog lamp, or interior lighting circuits in modern vehicle BCMs. IC Role / Device Role / Timing Role: High-side switch with real-time current monitoring and open-load diagnostics for LED/resistive lamp loads. Use Value: Replaces electromechanical relays with 90% smaller footprint, eliminates contact wear, and enables predictive maintenance via IS fault reporting. |
Use Scenario: Driving solenoids, valves, or small motors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Protected high-side driver with programmable current limit and thermal cycling for intermittent inductive loads. Use Value: Eliminates need for discrete current-sense resistors and external protection ICs, reducing BOM count by 4+ components per channel. |
| Smart Fuse Replacement | 12V Embedded Systems |
|
Use Scenario: Digitally controlled power distribution in automotive infotainment or ADAS domain controllers. IC Role / Device Role / Timing Role: Intelligent fuse with overcurrent/overtemperature latching and diagnostic feedback for system-level fault logging. Use Value: Provides precise 25A short-circuit trip with auto-restart behavior, enabling safe "soft-fuse" operation without manual reset. |
Use Scenario: Power sequencing and load switching in compact industrial gateways or telematics units. IC Role / Device Role / Timing Role: Low-quiescent (<0.5µA) high-side switch for always-on subsystems requiring wake-on-event capability. Use Value: Enables ultra-low-power sleep modes while retaining diagnostic readiness-critical for battery-backed remote monitoring nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon BTS7004-1EPP | Higher RDS(ON) (120mΩ @ 150°C); no integrated current-sense ratio calibration; requires external sense resistor | Lacks proportional IS output; open-load detection requires external voltage comparator | Choose when cost sensitivity outweighs diagnostic precision and board space is not constrained |
| STMicroelectronics VNQ7050AJTR | Lower nominal current (3.5A); fixed 1000× KILIS; no voltage-dependent current limiting | Supports only 5–28V but lacks 41V load-dump clamping; thermal shutdown is non-cycling | Prefer for simpler designs where dynamic overload response and ISO 7637 compliance are not required |
Compared with BTS7004-1EPP and VNQ7050AJTR, the ZXMS81045SPQ uniquely combines calibrated 1200× current sensing, voltage-dependent short-circuit limiting, and active 41V load-dump clamping-enabling single-chip replacement of relay+fuse+sense+protection in space-constrained automotive modules.
Availability
ZXMS81045SPQ is available at Aetrix Electronics and suitable for automotive body control, industrial PLC I/O, smart fuse replacement, and 12V embedded systems requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for ZXMS81045SPQ 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF16949-certified manufacturing.
The ZXMS81045SPQ belongs to Diodes' IntelliFET® family of intelligent high-side switches, designed specifically for AEC-Q100-compliant automotive power distribution with integrated diagnostics and protection.
FAQ
What is the maximum load-dump voltage the ZXMS81045SPQ can withstand?
The ZXMS81045SPQ is rated for 41V load-dump protection per ISO 7637-2, achieved through internal active clamping between VS and GND. This eliminates the need for external TVS diodes in automotive 12V systems, and the clamping voltage remains stable at 47V typical across temperature and current conditions.
How does open-load detection work in both ON and OFF states?
In ON state, open-load is detected by monitoring IS current-if load current falls below 5mA while IN is high, the device asserts IIS(FAULT). In OFF state, it measures VOUT; if voltage exceeds 3.5–4.5V (indicating no ground path), it triggers open-load fault signaling via IS pin, enabling fail-safe diagnostics without external components.
Can the ZXMS81045SPQ drive inductive loads like motors or solenoids?
Yes-the device includes an active output clamp (VDS(AZ) = 47V typical) that safely dissipates inductive ring-back energy during turn-off. It supports inductive loads up to 5µH with 4A current, and its slew-rate-controlled switching (0.25V/µs typical) minimizes EMI in motor-control applications.
Is the current-sense ratio (KILIS) stable across load current and temperature?
KILIS is specified as 1200 ±23% from 50mA to 4A, with tighter tolerance at higher currents (±5% at 4A). The device uses voltage-drop regulation to maintain sense accuracy at low loads, and temperature dependency is characterized and compensated within the monolithic die-no external calibration is required.
ZXMS81045SPQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed 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:
- 5V ~ 28V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 4A
- Rds On (Typ):
- 34mOhm
- Input Type:
- Non-Inverting
- Features:
- Auto Restart, Slew Rate Controlled
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, Over Voltage, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
ZXMS81045SPQ-13 FAQ
1.How can I place an order for ZXMS81045SPQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXMS81045SPQ-13 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 ZXMS81045SPQ-13 reliable?
The price and inventory of ZXMS81045SPQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXMS81045SPQ-13 is usually 5 days.
3.What payment methods are accepted for ZXMS81045SPQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXMS81045SPQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXMS81045SPQ-13?
ZXMS81045SPQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXMS81045SPQ-13 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 ZXMS81045SPQ-13?
For technical support, including ZXMS81045SPQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXMS81045SPQ-13 requirements.
6.How does Aetrix verify that ZXMS81045SPQ-13 is sourced from the original manufacturer or authorized distributors?
All ZXMS81045SPQ-13 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 ZXMS81045SPQ-13 meets industry standards.
7.What is the process for return or replacement of ZXMS81045SPQ-13?
All ZXMS81045SPQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with ZXMS81045SPQ-13, 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 ZXMS81045SPQ-13 part is unused and in its original packaging.
Return procedure for ZXMS81045SPQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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