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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Analog Devices Inc./Maxim Integrated MAX20076ATCB/V+T

Name: MAX20076ATCB/V+T
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX20076ATCB/V+T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX20076ATCB/V+T

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 12-WFDFN Exposed Pad

Datasheet:: MAX20076ATCB/V+T.pdf

Description:: IC REG BUCK PROG/1V 1.2A 12TDFN

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Product details

Overview

MAX20076ATCB/V+T from Analog Devices is a 36V-input, 1.2A synchronous buck converter with integrated high-side and low-side MOSFETs, fixed 3.3V output (±2% accuracy), 2.1MHz switching frequency, and AEC-Q100 qualification for automotive power rails. It operates from 3.5V to 36V input, supports 99% dropout duty cycle, and delivers stable 3.3V at up to 1.2A for infotainment and ADAS domain controllers.

For engineers reviewing the MAX20076ATCB/V+T datasheet, MAX20076ATCB/V+T pinout, MAX20076ATCB/V+T application, or MAX20076ATCB/V+T equivalent, key selection criteria include its 3.3V fixed output accuracy, 20ns minimum on-time enabling 3.3V from 36V input, spread-spectrum EMI reduction via SPS pin, PGOOD monitoring, and side-wettable TDFN-EP package for automated optical inspection in automotive PCB assembly.

Technical Context

This current-mode-controlled buck regulator uses internal slope compensation and fixed-frequency PWM (FPWM-only operation) to achieve tight regulation across wide input ranges. Its 20ns minimum on-time enables direct 3.3V conversion from automotive battery transients up to 40V, eliminating cascaded converters for low-voltage rails.

The device integrates 300mΩ high-side and 200mΩ low-side MOSFETs, features programmable soft-start (2.5ms), 40V load-dump protection, and thermal shutdown at 175°C with 15°C hysteresis - all optimized for under-hood automotive environments operating from −40°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.3V ±2% over 6V–18V input range; ensures stable MCU core supply without external feedback resistors.
Max Output Current	1.2A continuous; sufficient for powering dual-core microcontrollers or CAN/FlexRay transceivers in body control modules.
Input Voltage Range	3.5V to 36V, with 40V transient tolerance; survives cold-crank (3.5V) and load-dump (40V) events per ISO 7637-2.
Switching Frequency	2.1MHz (typ); enables use of compact 4.7µH inductors and 22µF ceramic output capacitors, minimizing solution footprint.
Minimum On-Time	66ns (typ); allows direct 3.3V regulation from 36V input (duty cycle ≈ 9.2%), avoiding two-stage conversion.
PGOOD Accuracy	Rising threshold at 93.5% VOUT (3.12V); provides precise power-rail validation before system boot sequence proceeds.
Thermal Rating	AEC-Q100 Grade 1 (−40°C to +125°C ambient); qualified for engine bay and front-end electronics placement.

Pinout & Package

MAX20076ATCB/V+T is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed pad (EP) for enhanced thermal dissipation. The EP must be soldered to PGND plane using ≥4 thermal vias for junction-to-board θJB = 9°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 SPS	Spread-spectrum enable	Logic-high enables ±6% frequency modulation to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable.
2 EN	High-voltage enable	Accepts 0–36V logic; no internal pullup/pulldown; enables direct connection to automotive KEY signal or 3.3V MCU GPIO.
3 BST	Bootstrap capacitor node	Requires 0.1µF ceramic cap to LX; sustains gate drive for high-side FET during continuous conduction in dropout mode.
4 SUP	Main supply input	3.5–36V input; bypass with 4.7µF ceramic cap to PGND; handles high di/dt ripple current during switching.
5 LX	Switching node	Connects to 4.7µH inductor; internal clamp diodes to PGND/AGND/SUP require careful layout to avoid exceeding power limits.
6 PGND	Power ground return	Low-impedance path for high-current switching loops; must be separated from AGND except at single-point OUT capacitor return.
7 AGND	Analog ground reference	Reference for FB, PGOOD, and internal bias; connects to PGND only at OUT capacitor cathode to prevent noise coupling.
8 FB	Feedback input	Internally tied to BIAS for fixed 3.3V output; open for resistor-divider configuration (1V–10V range).
9 OUT	Regulated output	3.3V output node; bypass with 22µF ceramic cap to PGND; serves as voltage sense point for feedback loop.
10 BIAS	Internal 5V bias rail	Supplies internal circuitry; requires 1µF ceramic cap to AGND; used as pullup for PGOOD and reference for FB in fixed-output mode.
11 SYNC	Sync clock input	Connect to BIAS to enable internal 2.1MHz oscillator; accepts external 1.7–2.6MHz clock for system-level synchronization.
12 PGOOD	Open-drain power-good	Active-high signal pulled low when VOUT < 3.12V; requires external 20kΩ pullup to BIAS or system rail for sequenced startup.

Key Features

Feature	Design Value
Synchronous buck with integrated FETs	Eliminates external MOSFETs and drivers; 300mΩ/200mΩ R_DS(on) reduces conduction loss and improves full-load efficiency >90% at 12V_IN/3.3V_OUT.
Automotive-grade protection suite	Includes 40V load-dump tolerance, −40°C to +125°C operation, AEC-Q100 qualification, thermal shutdown (175°C), and short-circuit hiccup mode.
Fixed 3.3V output with ±2% accuracy	Guaranteed over temperature and line/load; removes need for external resistor divider calibration and reduces BOM count by one component.
2.1MHz FPWM operation	Enables small magnetics and ceramics; avoids AM band (0.53–1.71MHz); constant frequency simplifies EMI filter design vs. variable-frequency alternatives.
Side-wettable TDFN package	Facilitates automated optical inspection (AOI) of solder joints on bottom-side pads; improves process yield in high-reliability automotive manufacturing.

Applications

Infotainment Power Supply	ADAS Camera Module Rail
Use Scenario: Powers SoC, display interface, and audio codec in automotive head units with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering clean, regulated power with fast transient response to dynamic SoC loads. Use Value: 20ns minimum on-time enables direct 3.3V generation from 36V transients, avoiding inefficient two-stage designs and reducing board area by 35%.	Use Scenario: Supplies image sensor and ISP in forward-facing camera modules requiring low-noise, stable 3.3V. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with PGOOD monitoring for safe power sequencing before sensor initialization. Use Value: ±2% output accuracy and 2.1MHz switching minimize output ripple (<15mV_pp), preventing image noise and frame corruption.
Body Control Unit (BCU)	Gateway ECU Power Management
Use Scenario: Provides 3.3V rail for LIN transceivers, door lock actuators, and ambient light sensors in centralized body controllers. IC Role / Device Role / Timing Role: High-input-voltage buck converter with 99% dropout capability maintaining regulation during cold-crank (3.5V). Use Value: 40V load-dump protection and AEC-Q100 qualification ensure uninterrupted operation during harsh automotive electrical events.	Use Scenario: Generates isolated 3.3V supply for CAN FD and Ethernet PHYs in vehicle gateway ECUs interfacing multiple domains. IC Role / Device Role / Timing Role: EMI-optimized buck regulator using spread-spectrum (SPS pin) to meet CISPR 25 Class 5 radiated emissions limits. Use Value: ±6% frequency modulation reduces peak spectral energy by 10dBµV, easing compliance without adding ferrite beads or shielding.

Infotainment Power Supply

ADAS Camera Module Rail

Use Scenario: Powers SoC, display interface, and audio codec in automotive head units with 12V battery input.

IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering clean, regulated power with fast transient response to dynamic SoC loads.

Use Value: 20ns minimum on-time enables direct 3.3V generation from 36V transients, avoiding inefficient two-stage designs and reducing board area by 35%.

Use Scenario: Supplies image sensor and ISP in forward-facing camera modules requiring low-noise, stable 3.3V.

IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with PGOOD monitoring for safe power sequencing before sensor initialization.

Use Value: ±2% output accuracy and 2.1MHz switching minimize output ripple (<15mV_pp), preventing image noise and frame corruption.

Body Control Unit (BCU)

Gateway ECU Power Management

Use Scenario: Provides 3.3V rail for LIN transceivers, door lock actuators, and ambient light sensors in centralized body controllers.

IC Role / Device Role / Timing Role: High-input-voltage buck converter with 99% dropout capability maintaining regulation during cold-crank (3.5V).

Use Value: 40V load-dump protection and AEC-Q100 qualification ensure uninterrupted operation during harsh automotive electrical events.

Use Scenario: Generates isolated 3.3V supply for CAN FD and Ethernet PHYs in vehicle gateway ECUs interfacing multiple domains.

IC Role / Device Role / Timing Role: EMI-optimized buck regulator using spread-spectrum (SPS pin) to meet CISPR 25 Class 5 radiated emissions limits.

Use Value: ±6% frequency modulation reduces peak spectral energy by 10dBµV, easing compliance without adding ferrite beads or shielding.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX20076ATCA/V+T	Fixed 5V output instead of 3.3V; identical package, pinout, and specs otherwise.	Used where 5V logic rails or USB peripherals require primary regulation.	Select MAX20076ATCA/V+T only if system architecture mandates 5V; MAX20076ATCB/V+T is optimal for 3.3V FPGA/MCU cores.
TPS62130ARGTR	3V–17V input, 3A output, 2.5MHz switching; not AEC-Q100 qualified; no 40V load-dump protection.	Suitable for industrial or consumer applications with benign input conditions and lower reliability requirements.	Choose TPS62130ARGTR only for non-automotive designs; MAX20076ATCB/V+T remains mandatory for automotive safety-critical systems.

Compared with MAX20076ATCA/V+T, this part offers tighter alignment with 3.3V digital rail requirements, while versus TPS62130ARGTR it provides essential automotive robustness - including load-dump survival, extended temperature range, and AEC-Q100 certification - that cannot be retrofitted in system design.

Availability

MAX20076ATCB/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and gateway ECUs requiring stable component supply with full automotive qualification and long-term lifecycle support.

Supply support for MAX20076ATCB/V+T 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and functional safety focus.

The MAX20076 is part of Analog Devices' automotive-qualified power management portfolio, designed specifically for demanding 12V/24V vehicle electrical systems requiring high input voltage tolerance, low EMI, and AEC-Q100 compliance.

FAQ

What is the maximum input voltage the MAX20076ATCB/V+T can withstand during load-dump events?

The MAX20076ATCB/V+T is rated for 40V transient input voltage per ISO 7637-2 Pulse 5a, with guaranteed operation up to 36V continuous. This allows it to survive automotive load-dump events without external TVS clamping, reducing system cost and board space. The device enters safe shutdown if junction temperature exceeds 175°C during sustained overload, and automatically recovers after cooling.

Does the MAX20076ATCB/V+T support adjustable output voltages, or is it fixed at 3.3V only?

The MAX20076ATCB/V+T is factory-trimmed for fixed 3.3V output with ±2% accuracy across temperature and line/load. While the MAX20076 family supports external resistor-divider programming (1V–10V), this specific variant (ATCB/V+T) is configured for 3.3V only - connecting FB to BIAS activates the internal reference. Using an external divider voids the output accuracy guarantee.

How does the spread-spectrum feature (SPS pin) affect EMI performance of the MAX20076ATCB/V+T?

When the SPS pin is driven high, the MAX20076ATCB/V+T modulates its 2.1MHz switching frequency by ±6%, spreading energy across a 252kHz bandwidth. This reduces peak radiated emissions by up to 10dBµV in CISPR 25 testing, helping meet Class 5 limits without added filtering. The modulation is disabled by default (SPS pulldown) and does not interfere with SYNC pin operation.

What is the recommended PCB layout practice for the exposed pad (EP) of the MAX20076ATCB/V+T?

The exposed pad of the MAX20076ATCB/V+T must be soldered to a solid PGND copper plane using ≥4 thermal vias (0.3mm diameter) placed within the pad boundary. The pad should connect exclusively to PGND - not AGND - and tie to the output capacitor's PGND terminal to minimize ground bounce. This achieves θJC = 9°C/W and prevents thermal derating above 70°C ambient.

Can the MAX20076ATCB/V+T operate in skip mode to improve light-load efficiency?

No - the MAX20076ATCB/V+T is specified for Forced-PWM (FPWM) operation only. Skip mode is not supported; attempting light-load operation outside FPWM may cause instability or violate output voltage accuracy. For skip-mode applications, Analog Devices recommends the MAX20076D variants (e.g., MAX20076DATCB/V+T), which are functionally distinct and not pin-compatible with MAX20076ATCB/V+T.

MAX20076ATCB/V+T Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 12-WFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Programmable (Fixed)

Number of Outputs:: 1

Voltage - Input (Min):: 3.5V

Voltage - Input (Max):: 36V

Voltage - Output (Min/Fixed):: 1V

Voltage - Output (Max):: 10V

Current - Output:: 1.2A

Frequency - Switching:: -

Synchronous Rectifier:: Yes

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-TDFN (3x3)

MAX20076ATCB/V+T FAQ

1.How can I place an order for MAX20076ATCB/V+T through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX20076ATCB/V+T 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 MAX20076ATCB/V+T reliable?

The price and inventory of MAX20076ATCB/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20076ATCB/V+T is usually 5 days.

3.What payment methods are accepted for MAX20076ATCB/V+T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20076ATCB/V+T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX20076ATCB/V+T?

MAX20076ATCB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX20076ATCB/V+T 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 MAX20076ATCB/V+T?

For technical support, including MAX20076ATCB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20076ATCB/V+T requirements.

6.How does Aetrix verify that MAX20076ATCB/V+T is sourced from the original manufacturer or authorized distributors?

All MAX20076ATCB/V+T 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 MAX20076ATCB/V+T meets industry standards.

7.What is the process for return or replacement of MAX20076ATCB/V+T?

All MAX20076ATCB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20076ATCB/V+T, 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 MAX20076ATCB/V+T part is unused and in its original packaging.

Return procedure for MAX20076ATCB/V+T:

1.Submit a request within 90 days.

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

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