MAX20040BATPA/VY+T

3.5V–36V Input, High-Efficiency Automotive Step-Down Regulator

Product Description

Product Overview

The MAX20040BATPA/VY+T is an automotive-qualified high-voltage step-down DC/DC converter designed to operate from wide input voltages up to 36 V, making it ideal for directly regulating power from automotive batteries. Featuring integrated high-side and low-side MOSFETs, the device delivers high efficiency across a wide load range while minimizing external component count. Advanced control architecture enables fast transient response, robust EMI performance, and reliable operation under harsh automotive and industrial conditions.

Key Features

Wide input voltage range: 3.5 V to 36 V
Automotive-grade AEC-Q100 qualified
Integrated high-side and low-side MOSFETs
High efficiency across wide load range
Supports up to 2 A continuous output current
Fixed-frequency PWM operation with spread-spectrum option
Fast transient response and current-mode control
Excellent EMI performance
Built-in soft-start
Comprehensive protection: UVLO, OVP, OCP, thermal shutdown
Compact TQFN power package with exposed pad

Applications

Automotive battery-powered systems
ADAS and infotainment power rails
Body electronics and ECU power supplies
Industrial 24 V distributed power systems
Automotive post-regulation stages
Embedded and edge computing platforms

Electrical Characteristics

Parameter	Typical
Converter Type	Step-Down (Buck) DC/DC
Input Voltage Range	3.5 V – 36 V
Output Voltage	Adjustable
Output Current	Up to 2 A
Switching Frequency	Fixed PWM (with spread spectrum)
Control Method	Current Mode
Integrated MOSFETs	Yes
Soft-Start	Internal
Protection	UVLO / OVP / OCP / TSD
Operating Temp.	–40 °C ~ +125 °C
Qualification	AEC-Q100 Automotive
Package	TQFN-EP
RoHS Compliance	RoHS Compliant