MAX20040

RECOMMENDED FOR NEW DESIGNS

Automotive, 2V to 36V, 2.2MHz, 0.6A/1.2A Buck-Boost Converters with Integrated H-Bridge Architecture Industry's First 2Mhz Automotive Buck-Boost Converter Operates Seamlessly from 2V Cold Crank to VBATT

Analog Devices MAX20040 Product Info

10 February 2026 5

Features

Meets Stringent Automotive Quality and Reliability Requirements
- 2V to 36V Operating V_IN Allows Operation in Cold-Crank Conditions
- Tolerates Input Transients Up to 40V
- EN Pin Compatible from 3.3V to 40V
- 0.6A (max) Output Current (MAX20039)
- 1.2A (max) Output Current (MAX20040)
- −40°C to +125°C Automotive Temperature Range
- AEQ-100
- Increased Efficiency with Reduced BOM Cost and Board Space
- Integrated FETs H-Bridge Architecture
- Fixed Output Voltages
- 20-Pin SWTQFN Package

Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements (B and D Version only)
- 52µA Quiescent Current when in Standby Mode
- 10µA (max) Quiescent Current in Shutdown Mode
High Switching Frequency Allows Use of Small External Components
- 200kHz to 2.2MHz Operating Frequency
- Skip Mode for Efficient Low-Power Operation (B and D version only)
- Fixed-Frequency PWM Mode
- External Frequency Synchronization
Reduced EMI Emissions at the Switching Frequency
- Spread Spectrum Can Be Enabled or Disabled

Part details & applications

The MAX20039/MAX20040 ICs are a small, synchronous buck-boost converter family with integrated high-side and low-side switches. The MAX20040 is designed to deliver up to 1.2A with input voltages from 2V to 36V while using only 52µA quiescent current at no load. The ICs provide an accurate output voltage of ±2%. Voltage quality can be monitored by observing the PGOOD signal.

The MAX20039/MAX20040 offer a fixed output voltage of 5V and a programmable range of 4.0V to 15V. See the Ordering Information table for more details. Frequency is adjustable from 220kHz to 2.2MHz, which allows for small external components, reduced output ripple, and guarantees no AM interference. Skip mode with low quiescent current of 52µA is available in the MAX20040B and MAX20040D versions of the IC. The ICs can operate with spread-spectrum frequency modulation designed to minimize EMI-radiated emissions due to the modulation frequency.

The MAX20039/MAX20040 are available in a small, 4mm × 4mm, 20-pin, side-wettable TQFN package and use very few external components.

Applications

Body Electronics
Infotainment Systems
Point-of-Load (PoL) Power Supply
Power over Coax (PoC)
Start-Stop Systems

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