MAX16977

PRODUCTION

36V, 2A, 2.2MHz Step-Down Converter with Low Operating Current

Direct Car Battery Voltage Conversion to 3.3V Above AM Radioband at 2A

Data Sheet (Rev. 5) Product Selection Table

Part Models: 15
1ku List Price: Starting From $2.62

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Overview

Supports Up to 2A Loads without External FET Saves Space and Cost
- Integrated 2A Internal High-Side (70mΩ typ) Switch
- Fast Load-Transient Response and Current-Mode Architecture
Direct Car Battery to Sub-5V Rail Conversion at Beyond 2MHz Reduces External Component Count
- 5V Fixed or 1V to 10V Adjustable Output Voltage
- High Duty Cycle During Undervoltage Transients
Robust Input Voltage Up to 36V Supports Automotive Applications
- Wide 3.5V to 36V Input Voltage Range
- 42V Input Transients Tolerance
- Overvoltage, Undervoltage, Overtemperature, and Short-Circuit Protections
Meets Tight OEM Power-Consumption Requirements with Low I_Q
- 30µA Standby Mode Operating Current
- 5µA Typical Shutdown Current
Advanced Clock Capabilities Offer Further Reduction in EMI if Necessary to Enable Noise-Free System Design
- Adjustable Switching Frequency (1MHz to 2.2MHz)
- Frequency-Synchronization Input
- Spread Spectrum (Optional)

The MAX16977 is a 2A, current-mode, step-down converter with an integrated high-side switch. The device is designed to operate with input voltages from 3.5V to 36V while using only 30µA quiescent current at no load. The switching frequency is adjustable from 1MHz to 2.2MHz by an external resistor and can be synchronized to an external clock. The output voltage is pin selectable to be 5V fixed or adjustable from 1V to 10V. The wide input voltage range along with its ability to operate at high duty cycle during undervoltage transients make the device ideal for automotive and industrial applications.

The device operates in skip mode for reduced current consumption in light-load applications. Protection features include overcurrent limit, overvoltage, and thermal shutdown with automatic recovery. The device also features a power-good monitor to ease power-supply sequencing.

The device operates over the -40°C to +125°C automotive temperature range, and is available in 16-pin TSSOP and TQFN (5mm x 5mm) packages with exposed pads.

Applications

Automotive
High-Voltage Input DC-DC Converters
Industrial
Point-of-Load Applications

Part Models: 15
1ku List Price: Starting From $2.62

Documentation

Data Sheet 1

MAX16977: 36V, 2A, 2.2MHz Step-Down Converter with Low Operating Current Data Sheet (Rev.5) 02/20/2017

User Guide 1

UG-5861: EE-SIM Design and Simulation Environment User Guide 05/05/2014

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX16977RATE+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RATE+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RATE/V+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RATE/V+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RAUE+	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RAUE+T	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RAUE/V+	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977RAUE/V+T	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SATE+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SATE+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SATE/V+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SATE/V+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SAUE+T	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SAUE/V+	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX16977SAUE/V+T	16-TSSOP_4.4_EP-4.4_MM	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX16977RATE+	PRODUCTION
MAX16977SATE+	PRODUCTION
Oct 3, 2014 - 1452 ELECTRICAL DATASHEET
		pcn_1452
MAX16977RATE+	PRODUCTION
MAX16977RATE/V+	PRODUCTION
MAX16977RATE/V+T	PRODUCTION
MAX16977RAUE+	PRODUCTION
MAX16977RAUE/V+	PRODUCTION
MAX16977RAUE/V+T	PRODUCTION
MAX16977SATE+	PRODUCTION
MAX16977SATE/V+	PRODUCTION
MAX16977SATE/V+T	PRODUCTION
MAX16977SAUE+T	PRODUCTION
MAX16977SAUE/V+	PRODUCTION
MAX16977SAUE/V+T	PRODUCTION
Jun 18, 2021 - 2161 ASSEMBLY
		pcn_2161
MAX16977RATE/V+	PRODUCTION
MAX16977RATE/V+T	PRODUCTION
MAX16977SATE/V+	PRODUCTION
MAX16977SATE/V+T	PRODUCTION
May 11, 2022 - 2236N ASSEMBLY
		pcn_2236n
MAX16977RAUE+	PRODUCTION
MAX16977SAUE+T	PRODUCTION
Jul 13, 2022 - 2236A ASSEMBLY
		pcn_2236a
MAX16977RAUE/V+	PRODUCTION
MAX16977RAUE/V+T	PRODUCTION
MAX16977SAUE/V+	PRODUCTION
MAX16977SAUE/V+T	PRODUCTION
Apr 9, 2018 - 1682 ASSEMBLY
		pcn_1682
MAX16977SATE+	PRODUCTION	pcn_1682
Feb 11, 2025 - 2455B ASSEMBLY
		pcn_2455b
MAX16977SATE/V+	PRODUCTION
MAX16977SATE/V+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 1
MAX16907	PRODUCTION	36V, 2.2MHz Step-Down Converter with Low Operating Current

Evaluation Kits

Evaluation Kit for the MAX16977

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Features and Benefits

Wide 3.5V to 36V Input Supply Range
Pin-Programmable Adjustable Output Voltage
Adjustable Switching Frequency (2.2MHz Default)
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX16977 evaluation kit (EV kit) demonstrates the MAX16977 2A, current-mode step-down converter with an integrated high-side switch. The EV kit operates over a wide 3.5V to 36V input voltage range. The EV kit has a switching frequency of 2.2MHz and a voltage output of 5V at 2A.