MAX20031
PRODUCTIONDual Buck, Sync Boost and LDO–Complete Front-End Power Supply with 17μA IQ
Complete Front End Automotive Power Supply Enables a Space-Efficient, Crank-Ready Design
- Part Models
- 14
- 1ku List Price
- Starting From $3.77
Overview
- Meets Stringent OEM Module Power Consumption and Performance Specifications
- 17µA IQ with 3.3V Buck on
- 25µA IQ with 5V Buck on
- 25µA IQ with LDO on
- 65µA IQ with All Controllers Enabled
- Enables Crank-Ready Designs
- Synchronous Boost Converter for High-Current Capability and Efficiency
- 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
- Forced Fixed-Frequency PWM Operation
- Resistor-Programmable Frequency Between 220kHz and 2.2MHz
- Pin-Selectable Spread Spectrum
- Integration and Thermally Enhanced Packages Save Board Space and Cost
- Dual 2.2MHz Step-Down Controller with Synchronous Boost Controller and HV 200mA LDO
- Current-Mode Controller with Forced-Fixed Frequency and Skip Modes
- Thermally Enhanced 7mm x 7mm, 48-Pin TQFN Packages with Exposed Pad
- Protection Features Improve System Reliability
- Supply Overvoltage and Undervoltage Lockout
- Overtemperature and Short-Circuit Protections
The MAX20030/MAX20031 ICs are automotive 2.2MHz dual-synchronous step-down controllers with preboost controller and low-IQ LDO. The preboost controller enables VOUT1 and VOUT2 to stay in regulation during cold-crank operation all the way down to battery input of 2V. The ICs offer two high-voltage synchronous step-down controllers that operate 180 degrees out of phase. This device operates with an input-voltage supply from 3.5V to 42V and can operate in dropout conditions by running at 97% duty cycle. It is 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 step-down controllers operate at a frequency of 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 (220kHz to 2200kHz). SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and synchronization to an external clock. The ICs have a spread-spectrum pin for frequency modulation to minimize EMI interference.
The ICs will be offered with a synchronous step-up controller. This preboost circuitry turns on during low input-voltage conditions, and is designed to provide power to step-down controller channels with input voltages as low at 2V.
The ICs feature a power-OK monitor and overvoltage and undervoltage lockout. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20030/MAX20031 are specified for operation over the -40°C to +125°C automotive temperature range.
Applications
- Distributed DC Power Systems
- Instrument Cluster
- Navigation and Radio Head Units
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 |
|---|---|---|---|
| MAX20031BATMA/V+ | LFCSP | ||
| MAX20031BATMA/V+T | LFCSP | ||
| MAX20031BATMB/V+ | LFCSP | ||
| MAX20031BATMB/V+T | LFCSP | ||
| MAX20031BATMC/V+ | LFCSP | ||
| MAX20031BATMC/V+T | LFCSP | ||
| MAX20031BATMD/V+ | LFCSP | ||
| MAX20031BATMD/V+T | LFCSP | ||
| MAX20031BATME/V+ | LFCSP | ||
| MAX20031BATME/V+T | LFCSP | ||
| MAX20031BATMF/V+ | LFCSP | ||
| MAX20031BATMF/V+T | LFCSP | ||
| MAX20031CATMD/V+ | LFCSP | ||
| MAX20031CATMD/V+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 31, 2019 - 1853 WAFER FAB |
||
| MAX20031BATMB/V+ | PRODUCTION | |
| MAX20031BATMB/V+T | PRODUCTION | |
| MAX20031BATMC/V+T | PRODUCTION | |
| MAX20031BATMD/V+ | PRODUCTION | |
| MAX20031BATMD/V+T | PRODUCTION | |
| MAX20031BATME/V+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Learn MoreEvaluation Kits
Evaluation Kit for the MAX20030/MAX20031
Resources
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