Features and Benefits
- Wide 3.5V to 36V Input Voltage Range
- 42V Input Transient Tolerance
- High Duty Cycle During Undervoltage Transients
- 220kHz to 1MHz Adjustable Switching Frequency
- Current-Mode Control Architecture
- Adjustable (1V to 10V) Output Voltage with ±2% Accuracy
- Three Operating Modes
- 50µA Ultra-Low Quiescent Current Skip Mode
- Forced Fixed-Frequency Mode
- External Frequency Synchronization
- Lowest BOM Count, Current-Mode Control Architecture
- Power-Good Output
- Enable Input Compatible from 3.3V Logic Level to 42V
- Current-Limit, Thermal Shutdown, and Overvoltage Protection
- -40°C to +125°C Automotive Temperature Range
- Automotive Qualified
The MAX16955 is a current-mode, synchronous PWM step-down controller designed to operate with input voltages from 3.5V to 36V while using only 50µA of quiescent current at no load. The switching frequency is adjustable from 220kHz to 1MHz by an external resistor and can be synchronized to an external clock up to 1.1MHz. The MAX16955 output voltage is pin programmable to be either 5V fixed or adjustable from 1V to 10V. The wide input voltage range, along with its ability to operate in dropout during undervoltage transients, makes it ideal for automotive and industrial applications.
The MAX16955 operates in fixed-frequency PWM mode and low quiescent current skip mode. It features an enable logic input, which is compatible up to 42V to disable the device and reduce its shutdown current to 10µA. Protection features include overcurrent limit, overvoltage, undervoltage, and thermal shutdown with automatic recovery. The device also features a powergood monitor to ease power-supply sequencing.
The MAX16955 is available in a thermally enhanced 16-pin TSSOP package with exposed pad and is specified for operation over the -40°C to +125°C automotive temperature range.
- Point of Load
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The MAX16955 evaluation kit (EV kit) is a fully assembled and tested PCB that contains all the components necessary to evaluate the performance of the MAX16955 synchronous PWM step-down controller. The device is available in a 16-pin TSSOP package and features an exposed pad for enhanced thermal dissipation.
The EV kit requires a 6V to 36V power supply for normal operation. The EV kit output is configured to 5V and can deliver up to 5A output current. The EV kit can be easily reconfigured to operate the controller in continuous PWM mode, SKIP mode, or external synchronization operation. The controller switching frequency is set to 400kHz. The EV kit includes a jumper to enable the circuit and an LED to monitor the power-good output.
- Point of Load
Features & Benefits
- 6V to 36V Input Range
- 5V at Up to 5A Output
- 400kHz Switching Frequency
- Selectable Forced Fixed-Frequency PWM Mode, SKIP Mode, or External Synchronization
- Power-Good LED Indicator
- Enable Input
- Cycle-by-Cycle Current Limit and Thermal Protection
- Proven PCB Layout
- Fully Assembled and Tested
Documentation & Resources
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.
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(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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