MAX16930
2MHz, 36V, Dual Buck with Preboost and 20µA Quiescent Current
Industry's Highest Performance Automotive Dual Buck Controller with Preboost Enables a Space-Efficient, Crank-Ready Design
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Overview
Features and Benefits
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 20µA Quiescent Current in Skip Mode
- ±1% Output-Voltage Accuracy: 5.0V/3.3V Fixed or Adjustable Between 1V and 10V
- Enables Crank-Ready Designs
- Integrated Preboost for Operation Down to 2V in Bootstrap Mode
- Wide Input Supply Range from 3.5V to 36V (without Preboost)
- EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range
- 50ns (typ) Minimum On-Time Guarantees Skip-Free Operation for 3.3V Output from Car Battery at 2.2MHz
- Frequency-Synchronization Input
- Resistor-Programmable Frequency Between 200kHz and 2.2MHz
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- Dual, 2MHz Step-Down Controllers
- 180° Out-of-Phase Operation
- Current-Mode Controllers with Forced-Continuous and Skip Modes
- Thermally Enhanced 40-Pin TQFN-EP and Side-Wettable QFND-EP Packages
- Protection Features Improve System Reliability
- Supply Overvoltage and Undervoltage Lockout
- Overtemperature and Short-Circuit Protection
Product Details
The MAX16930/MAX16931 offer two high-voltage, synchronous step-down controllers and a step-up preboost controller. They operate with an input voltage supply from 2V to 42V with preboost active and can operate in drop-out condition by running at 95% duty cycle. The devices are intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions.
The MAX16930/MAX16931 step-down controllers operate 180° out-of-phase at frequencies up to 2.2MHz to allow small external components, reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor adjustable. The FSYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current (20µA), and synchronization to an external clock. The devices also provide a spread-spectrum option to minimize EMI interference.
The MAX16930/MAX16931 are offered with an asynchronous step-up controller. This preboost circuitry turns on during low input voltage conditions. It is designed to provide power to step-down controller channels with input voltages as low as 2V.
The devices also feature a power-OK monitor and overvoltage and undervoltage lockout. Protection features include cycle-by-cycle current limit and thermal shutdown.
The devices are available in 40-pin TQFN-EP and side-wettable QFND-EP packages and are specified for operation over the -40°C to +125°C automotive temperature range.
Applications
- Distributed DC Power Systems
- Navigation and Radio Head Units
- POL Applications for Automotive Power
Product Lifecycle
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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.
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