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MAX16903: 2.1MHz, High-Voltage, 1A Mini-Buck Converter Data Sheet (Rev. 10)4/25/2017PDF798K
MAX16903
2.1MHz, High-Voltage, 1A Mini-Buck Converter
1A Automotive Buck Converter Integrates High- and Low-Side FETs and Uses Only 25µA Quiescent Current
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Overview
Features and Benefits
- Meets Stringent Automotive Quality and Reliability Requirements
- +3.5V to +28V Input Voltage Range Allows Operation in "Cold Crank" Conditions
- Tolerates Input-Voltage Transients to +42V
- Enable-Pin Compatible from +3.3V Logic Level to +42V
- 1A Minimum Output Current with Overcurrent Protection
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
- Increased Efficiency and Reduced BOM Cost and Board Space
- Integrated High- and Low-Side FETs
- Fixed Output Voltages (see the Selector Guide in the full data sheet and Contact the Factory for All Available Trimmed Output-Voltage Options)
- 10-Pin TDFN-EP or 16-Pin TSSOP-EP Packages
- Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements
- 25µA Quiescent Current During Skip Mode Operation
- High Switching Frequency Allows Use of Small, Low-Cost External Components
- 2.1MHz Switching Frequency with Three Modes of Operation
- Skip Mode for Efficient, Low-Power Operation
- Forced Fixed-Frequency Operation
- External Frequency Synchronization
- Reduced EMI Emissions at the Switching Frequency
- Optional Spread-Spectrum Frequency Modulation
Product Details
The MAX16903 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver 1A with input voltages from +3.5V to +28V while using only 25µA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signal. The MAX16903 can operate in dropout by running at 97% duty cycle, making it ideal for automotive and industrial applications.
The MAX16903 operates at a 2.1MHz frequency, allowing for small external components and reduced output ripple. It guarantees no AM band interference. SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode (ultra-low quiescent current of 25µA), and synchronization to an external clock. The MAX16903 can be ordered with spread-spectrum frequency modulation, designed to minimize EMI-radiated emissions due to the modulation frequency.
The MAX16903 is available in a thermally enhanced, 3mm x 3mm, 10-pin TDFN package or a 16-pin TSSOP package. The MAX16903 operates over the -40°C to +125°C automotive temperature range.
Applications
- Automotive
- High-Voltage Input-Power DC-DC Applications
- Industrial
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