MAX20030

Dual 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


Please check latest availability status for a specific part variant.

Description

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.

MAX20030, MAX20031: Block Diagram MAX20030, MAX20031: Block Diagram Enlarge+

Key Features

  • 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

Applications/Uses

  • Distributed DC Power Systems
  • Instrument Cluster
  • Navigation and Radio Head Units

See parametric specs for Step-Down/Up Switching Regulators (33)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
IOUT1
(A)
(min)(max)(min)(max)
MAX20031 NEW!242110

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX20030EVKIT: Evaluation Kit for the MAX20030/MAX20031

Tools & Models

  • EE-Sim: Design & Simulate MAX20030
  • Request Reliability Report for: MAX20030 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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