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STMicroelectronics EVALA5970AD

Name: EVALA5970AD
Brand: STMicroelectronics
SKU: EVALA5970AD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EVALA5970AD

Manufacturer:: STMicroelectronics

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: EVALA5970AD.pdf

Description:: EVAL BOARD FOR A5970AD

Quantity:: RFQ Add To RFQ list

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Shipping:

Inventory:1,118

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Product details

Overview

EVALA5970AD from STMicroelectronics is an automotive-grade evaluation board for the A5970AD 1 A step-down switching regulator, designed to validate power supply designs in cold-crank (4 V) to battery-transient (36 V) automotive environments. It supports adjustable output voltages from 1.235 V to VIN, features 500 kHz fixed-frequency operation, internal P-channel DMOS switch (R_DS(on) = 250 mΩ), and AEC-Q100-qualified thermal shutdown and current limiting.

For engineers reviewing the EVALA5970AD datasheet, EVALA5970AD pinout, EVALA5970AD application, or EVALA5970AD equivalent, this board enables rapid validation of buck converter loop stability, synchronization behavior, zero-load burst-mode operation, and short-circuit protection under real-world automotive input transients and thermal stress conditions.

Technical Context

The EVALA5970AD implements the full functional schematic of the A5970AD IC-including its internal 3.3 V reference, COMP compensation node, SYNCH master/slave interface, and INH inhibit control-on a SO-8 footprint PCB with optimized high-current paths and thermal relief. It integrates all required passive components for a standard buck configuration: input/output capacitors, power inductor, feedback divider, and soft-start network.

It directly exposes all eight pins of the A5970AD (OUT, SYNCH, INH, COMP, FB, VREF, GND, VCC) via test points and solder pads, enabling real-time probing of switching waveforms, error amplifier dynamics, and synchronization signal integrity. The board supports external clock injection, feedback disconnection testing, and thermal monitoring via onboard temperature sensor pads.

Key Specifications

Parameter	Value and Actual Design Meaning
Target Device	A5970AD monolithic buck regulator (SO-8 package, P-channel DMOS, 1 A DC output)
Input Voltage Range	4 V to 36 V - validated for automotive cold-crank (4 V) and load-dump (36 V) compliance
Switching Frequency	500 kHz ±15% - fixed internal oscillator; supports synchronization via SYNCH pin
Output Adjustment	1.235 V to VIN - set by external resistor divider on FB pin; includes 3.3 V VREF pin for biasing
Protection Features	Pulse-by-pulse current limit (1.35 A min), thermal shutdown (150 °C ±10 °C), feedback disconnect disable, OVP (30% above FB threshold)
Quiescent Current	2.7 mA operating; ≤100 µA in INH-disabled standby - enables always-on automotive subsystems
Thermal Design	SO-8 footprint with exposed thermal pad; R_thJA = 120 °C/W on evaluation board per datasheet

Availability

EVALA5970AD is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power rails, ADAS camera supplies, and telematics ECUs requiring stable component supply across extended temperature (-40 °C to +125 °C) and harsh electrical environments.

Supply support for EVALA5970AD 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, specializing in automotive, industrial, and power management ICs with broad AEC-Q100 qualification coverage and ISO/TS 16949 manufacturing certification.

The A5970AD product line delivers compact, robust buck regulators for automotive subsystems where input voltage resilience, low quiescent current, and integrated protection are mandatory - targeting replacement of discrete DC/DC solutions in ECU power trees.

FAQ

What is the purpose of the EVALA5970AD evaluation board?

The EVALA5970AD is a fully assembled, tested reference design board that demonstrates the A5970AD buck regulator in a typical automotive application circuit. It enables engineers to verify performance metrics - including efficiency, transient response, thermal behavior, and protection activation - without designing a custom PCB, accelerating development of 12 V or 24 V automotive power supplies.

Does EVALA5970AD support synchronization with other regulators?

Yes. The board exposes the SYNCH pin of the A5970AD IC and includes routing for master/slave configuration. When multiple EVALA5970AD boards are connected via their SYNCH pins, the device with the highest natural switching frequency (up to 570 kHz) automatically becomes the master, eliminating beat-frequency noise in multi-rail systems - confirmed per Section 5.3 and Figure 6 of the A5970AD datasheet.

How is feedback disconnection protection verified on this board?

The EVALA5970AD implements the A5970AD's built-in feedback disconnect detection: if the FB pin is left floating or disconnected during operation, the IC disables the power stage within microseconds to prevent uncontrolled output voltage rise. This behavior can be observed using an oscilloscope on the OUT pin while manually lifting the FB divider connection - matching the functional description in Section 6.1 of the datasheet.

Can EVALA5970AD operate down to 4 V input for cold-crank simulation?

Yes. The board is validated to start and regulate continuously at V_IN = 4 V (minimum specified operating voltage), maintaining stable output under full 1 A load. This capability is enabled by the A5970AD's low dropout operation (100% duty cycle) and UVLO hysteresis tuned for automotive battery sag - as characterized in Table 2 (Absolute Maximum Ratings) and Section 5.2 of the datasheet.

EVALA5970AD Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Box

Product Status:: Active

Main Purpose:: DC/DC, Step Down

Outputs and Type:: 1 Non-Isolated Output

Voltage - Output:: -

Current - Output:: 1.235V ~ 35V

Voltage - Input:: 1A

Regulator Topology:: 4V ~ 36V

Frequency - Switching:: Buck

Contents:: 500kHz

Utilized IC / Part:: Board(s)

Power - Output:: A5970AD

EVALA5970AD FAQ

1.How can I place an order for EVALA5970AD through Aetrix?

Please submit a Request for Quotation (RFQ) for EVALA5970AD 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 EVALA5970AD reliable?

The price and inventory of EVALA5970AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EVALA5970AD is usually 5 days.

3.What payment methods are accepted for EVALA5970AD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EVALA5970AD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EVALA5970AD?

EVALA5970AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EVALA5970AD 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 EVALA5970AD?

For technical support, including EVALA5970AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EVALA5970AD requirements.

6.How does Aetrix verify that EVALA5970AD is sourced from the original manufacturer or authorized distributors?

All EVALA5970AD 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 EVALA5970AD meets industry standards.

7.What is the process for return or replacement of EVALA5970AD?

All EVALA5970AD units undergo pre-shipment inspection (PSI). If there is an issue with EVALA5970AD, 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 EVALA5970AD part is unused and in its original packaging.

Return procedure for EVALA5970AD:

1.Submit a request within 90 days.

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

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