MAX1956
PRODUCTION1.6V to 5.5V Input, 0.5% Accurate, Dual 180° Out-of-Phase Step-Down Controllers
Industry's First 0.5%-Accurate, 1.6V to 5.5V Input, Dual-Output, Step-Down DC-DC Controllers
- Part Models
- 2
- 1ku List Price
- Starting From $6.55
Overview
- Operates from a 1.6V to 5.5V Supply (MAX1956)
- 0.5% Output Accuracy
- 0.8V to 0.9VIN Output Range
- Up to 25A per Phase Output Current
- On-Chip Boost Regulator Provides 5V Gate Drive
- Up to 93% Efficiency
- 180° Out-of-Phase Operation
- ±4% Voltage Margining
- Lossless, Foldback Current Limit
- Selectable Voltage Sequencing
- Synchronizable to External Clock
- Digital Soft-Start and Soft-Stop
- Small 28-Pin, 5mm x 5mm Thin QFN Package
The MAX1955/MAX1956 are dual-output, fixed-frequency, voltage-mode, pulse-width modulated (PWM) step-down controllers with 0.5% output accuracy. Each controller switches at a constant 600kHz and is 180° out-of-phase with the other controller, reducing input ripple current and the number of input capacitors.
An on-chip bias supply generates a 5V gate drive to deliver up to 25A output current per phase with low-cost N-channel MOSFETs at up to 93% efficiency. Lossless adjustable current limit eliminates expensive current-sense resistors and improves efficiency. Foldback current limit reduces power dissipation during short-circuit conditions and handles transient overloads better than controllers using hiccup-mode short-circuit protection.
Output voltage margining shifts output voltage by ±4% from the nominal value to simplify system test. Outputs also can be powered up and down in selectable sequences to meet core and logic supply-rail requirements.
The MAX1955/MAX1956 are available in a 28-lead thin QFN package with exposed pad.
Applications
- DSP, ASIC, µP, and FPGA Supplies
- Servers
- Telecom and Network Equipment
- Wireless Base Stations
Documentation
Data Sheet 1
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 |
|---|---|---|---|
| MAX1956ETI+ | LFCSP | ||
| MAX1956ETI+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX1956ETI+ | PRODUCTION | |
| MAX1956ETI+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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