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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management

Diodes Incorporated ZXCT1009QFTA

Name: ZXCT1009QFTA
Brand: Diodes Incorporated
SKU: ZXCT1009QFTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCT1009QFTA

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZXCT1009QFTA.pdf

Description:: IC CURRENT MONITOR 1% SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,354

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Product details

Overview

ZXCT1009QFTA from Diodes Incorporated is an automotive-grade micropower high-side current sense monitor in SOT23-3 package, delivering 1% typical accuracy, 4µA quiescent current, and 2.5V–20V supply range. It converts shunt voltage (up to 2.5V) into a proportional output current (10mA/V transconductance), enabling ground-referenced voltage sensing without ground-plane disruption-ideal for battery-powered automotive subsystems requiring low-power, AEC-Q100-compliant monitoring.

For engineers reviewing the ZXCT1009QFTA datasheet, ZXCT1009QFTA pinout, ZXCT1009QFTA application, or ZXCT1009QFTA equivalent, key selection criteria include its high-side topology, ultra-low I_Q, AEC-Q100 Grade 3 qualification, output current scaling capability, and compatibility with PCB trace shunts for cost-sensitive automotive current measurement.

Technical Context

The ZXCT1009QFTA operates as a fixed-transconductance current mirror: VSENSE+ and VSENSE− sense differential voltage across a high-side shunt, and IOUT delivers a precise 10mA/V output current independent of supply voltage. Its architecture eliminates ground-path interruption and supports operation down to 2.5V supply while maintaining 1% accuracy over temperature and load.

It features internal ESD protection (2kV HBM), operates from −40°C to +85°C, and integrates no active feedback loop-relying on external ROUT to set output voltage scale. The device's 300kHz bandwidth (at 100mV input) and 4µA quiescent current make it suitable for always-on automotive monitoring nodes where power budget and reliability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.5V to 20V - enables direct connection to 3.3V, 5V, 12V, and 24V automotive rails without LDO pre-regulation
Quiescent Current	4µA - allows continuous current monitoring in battery-backed systems with multi-year standby life
Transconductance	10mA/V - provides predictable, linear IOUT scaling for any VSENSE between 0–2.5V
Accuracy	±1% typical - ensures reliable overcurrent detection thresholds without system-level calibration
Sense Voltage Range	0–2.5V differential - accommodates standard shunt values (e.g., 10mΩ–100mΩ) at 1A–250A loads
Bandwidth	300kHz - supports fast transient detection in motor stall or short-circuit events
AEC-Q100 Grade	Grade 3 (−40°C to +85°C) - qualified for under-hood and cabin electronics with PPAP support

Pinout & Package

SOT23-3 package (suffix F), 2.9mm × 1.3mm footprint, 0.95mm height, thermal resistance θ_JA = 280°C/W, rated for 450mW dissipation at T_A = +25°C.

Pin/Terminal	Circuit Role	Design Meaning
VSENSE+	High-side shunt connection point	Connects to supply rail side of current-sense resistor; referenced to VIN
VSENSE−	Load-side shunt connection point	Connects to load side of shunt; defines differential sense voltage (VSENSE = VSENSE+ − VSENSE−)
IOUT	Proportional output current sink	Delivers 10mA/V × VSENSE; requires external ROUT to ground to generate VOUT

Key Features

Feature	Design Value
High-side sensing topology	Enables current monitoring without breaking ground return path-critical for isolated or mixed-signal systems
User-defined output scaling	External ROUT sets full-scale VOUT (e.g., 1kΩ yields 1V per 100mV VSENSE), eliminating need for precision op-amps
Ultra-low quiescent current	4µA operation allows integration into always-on vehicle modules (e.g., body control units) without battery drain penalty
PCB trace shunt compatibility	Linear transfer characteristic supports low-cost copper-trace shunts (e.g., 25mm × 0.25mm, ~150mΩ), reducing BOM count
AEC-Q100 Grade 3 qualification	Validated for automotive production use with documented PPAP readiness and thermal cycling reliability data

Applications

Automotive Battery Monitoring

DC Motor Stall Detection

Use Scenario: Real-time monitoring of 12V lead-acid or Li-ion battery discharge/charge current in start-stop systems.

IC Role / Device Role / Timing Role: High-side current sensor converting shunt voltage to scalable output current for ADC input.

Use Value: Enables accurate state-of-charge estimation and over-discharge protection with <1% gain error and no ground disturbance.

Use Scenario: Detecting stalled condition in automotive window lift or seat adjustment motors during end-of-travel.

IC Role / Device Role / Timing Role: Fast-response current monitor triggering MCU interrupt when load current exceeds threshold.

Use Value: 300kHz bandwidth captures rapid current rise during stall, preventing motor burnout before thermal shutdown occurs.

Overcurrent Protection Circuit

Body Control Module Load Monitoring

Use Scenario: Secondary overcurrent detection in fused power distribution networks for lighting or HVAC actuators.

IC Role / Device Role / Timing Role: Analog front-end providing fault signal to supervisor IC or microcontroller GPIO.

Use Value: 2.5V max sense range supports high-current shunts (e.g., 5mΩ @ 50A), enabling compact, low-loss protection design.

Use Scenario: Continuous current logging of door lock, mirror, or interior lighting circuits in BCM firmware.

IC Role / Device Role / Timing Role: Micropower current sense element feeding low-speed SAR ADC in 8-bit MCU.

Use Value: 4µA I_Q permits integration into resource-constrained, low-cost BCMs without compromising sleep-mode battery life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX4080TASA+	Higher quiescent current (75µA), wider V_SUPPLY (4.5V–76V), integrated gain resistor, SO8 package	Requires higher minimum supply; better suited for 24V commercial truck systems than 12V passenger car battery monitoring	Select when >20V operation or integrated gain is required; avoid if µA-level I_Q is mandatory
INA219AIDR	I²C digital output, 12-bit ADC, bidirectional sensing, 26V max common-mode, SO8 package	Replaces analog signal chain with digital interface; adds firmware overhead but enables multi-channel monitoring	Select when system already uses I²C bus and requires voltage/current/power telemetry-not for simple analog threshold detection

Compared with MAX4080TASA+ and INA219AIDR, the ZXCT1009QFTA offers the lowest power consumption and smallest footprint for basic high-side analog current scaling, making it optimal for cost- and space-constrained automotive modules where simplicity and AEC-Q100 compliance are primary drivers.

Availability

ZXCT1009QFTA is available at Aetrix Electronics and suitable for automotive battery monitoring, DC motor stall detection, and overcurrent protection circuits requiring stable component supply, AEC-Q100 Grade 3 qualification, and long-term production continuity.

Supply support for ZXCT1009QFTA 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, automotive-qualified components with broad distribution and application engineering support.

The ZXCT1009QFTA belongs to Diodes' automotive current sensing product line, designed specifically for high-side, micropower, AEC-Q100-compliant current monitoring in battery management, motor control, and power distribution systems.

FAQ

What is the maximum sense voltage the ZXCT1009QFTA can handle?

The ZXCT1009QFTA supports a maximum differential sense voltage (VSENSE = VSENSE+ − VSENSE−) of 2.5V. This limit is specified in the Absolute Maximum Ratings table and confirmed in Electrical Characteristics. Exceeding this may cause permanent damage or accuracy degradation, especially at elevated temperatures.

Can the ZXCT1009QFTA be used with a 3.3V supply?

Yes-the ZXCT1009QFTA operates from 2.5V to 20V, so 3.3V is fully supported. At 3.3V supply, it maintains 1% typical accuracy and 4µA quiescent current. Output current scales linearly with VSENSE, and ROUT must be selected to ensure VOUT remains within the safe operating range of downstream circuitry.

How does the ZXCT1009QFTA achieve AEC-Q100 Grade 3 qualification?

The ZXCT1009QFTA underwent full AEC-Q100 stress testing including temperature cycling (−40°C to +125°C), high-temperature operating life (1000 hours at +85°C), and ESD (2kV HBM). Diodes Incorporated provides PPAP documentation, failure analysis reports, and lot traceability-confirmed in DS36990 Rev. 1–2 and their automotive compliance portal.

Is a PCB trace usable as the sense resistor with ZXCT1009QFTA?

Yes-Diodes explicitly validates PCB copper traces as shunts in the datasheet (page 7). A 25mm × 0.25mm trace with 1oz copper yields ~150mΩ and exhibits PTC behavior that compensates the device's NTC drift. Layout guidelines and normalized performance curves are provided in the Application Information section.

ZXCT1009QFTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Monitor

Sensing Method:: High-Side

Accuracy:: ±1%

Voltage - Input:: 2.5V ~ 20V

Current - Output:: 9.98mA

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZXCT1009QFTA FAQ

1.How can I place an order for ZXCT1009QFTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCT1009QFTA 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 ZXCT1009QFTA reliable?

The price and inventory of ZXCT1009QFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT1009QFTA is usually 5 days.

3.What payment methods are accepted for ZXCT1009QFTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT1009QFTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCT1009QFTA?

ZXCT1009QFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCT1009QFTA 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 ZXCT1009QFTA?

For technical support, including ZXCT1009QFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT1009QFTA requirements.

6.How does Aetrix verify that ZXCT1009QFTA is sourced from the original manufacturer or authorized distributors?

All ZXCT1009QFTA 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 ZXCT1009QFTA meets industry standards.

7.What is the process for return or replacement of ZXCT1009QFTA?

All ZXCT1009QFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT1009QFTA, 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 ZXCT1009QFTA part is unused and in its original packaging.

Return procedure for ZXCT1009QFTA:

1.Submit a request within 90 days.

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

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