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

Diodes Incorporated ZXCT180B3W5-7

Name: ZXCT180B3W5-7
Brand: Diodes Incorporated
SKU: ZXCT180B3W5-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZXCT180B3W5-7

Manufacturer:: Diodes Incorporated

Category:: Current Regulation/Management

Package:: SC-74A, SOT-753

Datasheet:: ZXCT180B3W5-7.pdf

Description:: CM VOLTAGE OUTPUT SOT25 T&R 3K

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Inventory:3,000

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Product details

Overview

ZXCT180B3W5-7 from Diodes Incorporated is a unidirectional current shunt monitor optimized for high-side and low-side sensing in automotive and industrial power systems, featuring 100V/V fixed gain, ±1% max gain error over −40°C to +125°C, 400μV max input offset voltage at 12V common-mode, and rail-to-rail output swing - enabling accurate detection of fault currents in motor control and solar inverter DC-link monitoring.

For engineers reviewing the ZXCT180B3W5-7 datasheet, ZXCT180B3W5-7 pinout, ZXCT180B3W5-7 application, or ZXCT180B3W5-7 equivalent, this device supports fast 150kHz small-signal bandwidth (C_L = 10pF), 2V/μs slew rate, and operation across −0.3V to 26V common-mode voltage independent of its 2.7V–5.5V supply - critical for robust current sensing in noisy 12V/24V automotive subsystems.

Technical Context

The ZXCT180B3W5-7 implements a precision current-sense amplifier topology with internal matched resistor networks to achieve 100V/V gain without external components. Its input stage operates beyond the supply rail, allowing direct sensing of shunt voltages referenced to 26V bus potentials while powered only by 5V.

It delivers rail-to-rail output (V_OH = V_S − 20mV, V_OL = GND + 0.5mV) into 10kΩ loads across full temperature range, with CMRR ≥84dB (typ. 110dB) and PSRR ≥−40μV/V - ensuring stable measurement accuracy under supply ripple and high common-mode transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	100V/V fixed - eliminates need for external gain-setting resistors; matches 10mV shunt drop to 1V output for 12-bit ADC full-scale use.
Common-Mode Range	−0.3V to 26V - enables direct sensing on battery rails or MOSFET source/drain nodes without level-shifting circuitry.
Bandwidth	150kHz @ C_L = 10pF - supports real-time detection of fast overcurrent events in BLDC motor commutation or inverter switching faults.
Input Offset Voltage	±400μV max (−40°C to +125°C) - ensures ≤0.4% full-scale error for 100mΩ shunt at 1A, critical for low-current fault thresholding.
Quiescent Current	370μA max - allows continuous monitoring in always-on automotive modules without excessive standby power draw.
Supply Voltage	2.7V to 5.5V - compatible with standard 3.3V or 5V microcontroller I/O domains and ADC reference voltages.
Temperature Range	−40°C to +125°C (AEC-Q100 Grade 1) - qualified for under-hood automotive applications including engine control and ADAS power stages.

Pinout & Package

Supplied in a 5-pin SOT25 package (3.0mm × 1.6mm × 1.1mm height), with gull-wing leads and matte tin plating per MIL-STD-202. Moisture sensitivity level 1 (J-STD-020).

Pin/Terminal	Circuit Role	Design Meaning
GND (Pin 2)	Reference ground	Return path for internal bias and output stage; must be star-connected to shunt and ADC ground to minimize measurement error.
VS (Pin 5)	Power supply	2.7V–5.5V analog supply; requires 0.1μF ceramic bypass capacitor placed within 2mm of pin for stability.
IN+ (Pin 1)	High-side sense input	Connects to shunt's supply-side terminal; withstands up to 26V regardless of VS presence - enables hot-swap sensing.
IN− (Pin 3)	Low-side sense input	Connects to shunt's load-side terminal; differential input rejects common-mode noise on high-voltage buses.
OUT (Pin 4)	Analog output	Voltage proportional to (I_LOAD × R_SHUNT) × 100; rail-to-rail swing (GND+0.5mV to VS−20mV) interfaces directly with 3.3V/5V ADCs.

Key Features

Feature	Design Value
Rail-to-rail output	Enables full dynamic range utilization of 3.3V or 5V ADCs without external level-shifting or amplification stages.
100V/V fixed gain	Eliminates external resistor matching errors and board space; guarantees ±1% gain accuracy over temperature and life.
−0.3V to 26V common-mode range	Supports bidirectional placement - measures current on either side of shunt without redesigning PCB layout or adding isolation.
2V/μs slew rate	Ensures <1μs response to step changes in load current, critical for detecting short-circuit events before MOSFET destruction.
AEC-Q100 Grade 1 qualification	Validated for automotive powertrain and chassis applications requiring reliability at +125°C ambient and thermal cycling endurance.

Applications

Motor Control

Automotive Body Control Module

Use Scenario: Real-time phase current monitoring in 3-phase BLDC motor drives for field-oriented control (FOC).

IC Role / Device Role / Timing Role: High-side current sensor measuring instantaneous current through upper-leg MOSFETs during PWM dead-time intervals.

Use Value: Enables precise torque regulation and overcurrent shutdown within 2μs of fault onset, preventing IGBT latch-up and thermal runaway.

Use Scenario: Load current supervision for smart fuse replacement in 12V vehicle lighting and HVAC subsystems.

IC Role / Device Role / Timing Role: Low-side current monitor feeding ADC input of body controller MCU to detect open/short circuits and gradual degradation.

Use Value: Provides ±1% current accuracy across −40°C to +125°C, enabling predictive maintenance alerts before fuse failure occurs.

Solar Inverter DC-Link Monitoring

Industrial PLC Output Stage Protection

Use Scenario: Continuous DC-link current measurement upstream of H-bridge in string inverters for MPPT and anti-islanding compliance.

IC Role / Device Role / Timing Role: High-side shunt monitor operating at 26V common-mode on PV array input, isolated from 5V control domain.

Use Value: Delivers 150kHz bandwidth and 2V/μs slew rate to capture rapid current surges during grid fault conditions, meeting UL 1741 SA requirements.

Use Scenario: Output current verification for 24V DC solid-state relay (SSR) modules in programmable logic controllers.

IC Role / Device Role / Timing Role: Low-side current sensor verifying SSR turn-on integrity and detecting wire-break or contact-weld failures.

Use Value: Achieves 400μV offset stability over temperature, reducing false-trip rate in safety-critical machine control loops.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional current sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA240A3IDR	100V/V gain, but wider common-mode (−4V to 80V); higher quiescent current (1.8mA); SOIC-8 package.	Better suited for 48V industrial systems; less optimal for space-constrained automotive PCBs due to larger footprint.	Select when >26V common-mode or enhanced ESD (±4kV contact) is required; avoid if 370μA supply budget is critical.
MAX4080TASA+	100V/V gain, but narrower common-mode (−0.1V to 24V); lower offset (±50μV typ); same SOT23-5 package.	Higher precision for lab-grade instrumentation; not AEC-Q100 qualified; limited to non-automotive environments.	Select for test equipment or medical devices needing sub-0.1% offset; avoid for automotive or harsh-environment deployment.

Compared with INA240A3IDR and MAX4080TASA+, the ZXCT180B3W5-7 uniquely balances AEC-Q100 Grade 1 qualification, 26V common-mode capability, ultra-low quiescent current, and SOT25 footprint - making it the optimal choice for cost-sensitive, thermally demanding automotive current sensing where board area and standby power are constrained.

Availability

ZXCT180B3W5-7 is available at Aetrix Electronics and suitable for motor control, automotive body electronics, and solar inverter DC-link monitoring requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for ZXCT180B3W5-7 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, with manufacturing certified to IATF 16949 and product qualification aligned to AEC standards.

The ZXCT180 series targets cost-effective, high-reliability current sensing in automotive power distribution and industrial motor drives - delivering precision performance in compact packages without external gain components.

FAQ

What is the difference between ZXCT180B3W5-7 and ZXCT180A3W5-7?

The ZXCT180B3W5-7 uses Pinout B (OUT on Pin 4), while ZXCT180A3W5-7 uses Pinout A (OUT on Pin 1). Both deliver identical 100V/V gain, electrical specs, and temperature performance. The pinout variation provides layout flexibility: Pinout B places OUT adjacent to GND and IN−, simplifying routing for low-noise low-side sensing configurations.

Can ZXCT180B3W5-7 measure current in high-side configuration with 24V bus voltage while powered by 3.3V?

Yes. The device supports common-mode input voltages from −0.3V to 26V independently of its 2.7V–5.5V supply. With 3.3V on VS, IN+ and IN− can be referenced to a 24V rail, and OUT will swing rail-to-rail (0.0005V to 3.28V) - enabling direct interface with 3.3V ADCs without level shifters.

What is the maximum capacitive load the OUT pin can drive without instability?

The ZXCT180B3W5-7 is stable with up to 1nF capacitive load on the OUT pin, as verified in the datasheet's "Maximum Capacitive Load" specification. For loads >100pF, add a 10Ω series resistor close to the OUT pin to isolate capacitance and prevent peaking or oscillation in high-impedance ADC sampling paths.

Does ZXCT180B3W5-7 require external filtering for accurate current measurement?

No external RC filter is required for basic operation, but a 0.1μF ceramic bypass capacitor is mandatory between VS and GND, placed within 2mm of the pins. For noisy environments (e.g., motor drive PWM), a 10nF capacitor from OUT to GND may be added to suppress high-frequency coupling without affecting 150kHz bandwidth.

ZXCT180B3W5-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Current Monitor

Sensing Method:: High/Low-Side

Accuracy:: ±0.1%

Voltage - Input:: 2.7V ~ 5.5V

Current - Output:: 8mA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-25

ZXCT180B3W5-7 FAQ

1.How can I place an order for ZXCT180B3W5-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXCT180B3W5-7 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 ZXCT180B3W5-7 reliable?

The price and inventory of ZXCT180B3W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXCT180B3W5-7 is usually 5 days.

3.What payment methods are accepted for ZXCT180B3W5-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXCT180B3W5-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXCT180B3W5-7?

ZXCT180B3W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXCT180B3W5-7 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 ZXCT180B3W5-7?

For technical support, including ZXCT180B3W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXCT180B3W5-7 requirements.

6.How does Aetrix verify that ZXCT180B3W5-7 is sourced from the original manufacturer or authorized distributors?

All ZXCT180B3W5-7 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 ZXCT180B3W5-7 meets industry standards.

7.What is the process for return or replacement of ZXCT180B3W5-7?

All ZXCT180B3W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXCT180B3W5-7, 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 ZXCT180B3W5-7 part is unused and in its original packaging.

Return procedure for ZXCT180B3W5-7:

1.Submit a request within 90 days.

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

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