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MAX25431

MAX25431

Automotive 40V, 2.2MHz, H-Bridge Buck-Boost Controller

Industry's Lowest IQ Buck-Boost Controller with Best in Class Transient Response

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Overview

Description

The MAX25431 is a current-mode buck-boost controller. The device operates with input voltages from 6V to 36V. The switching frequency is resistor programmable from 220kHz to 2.2MHz and can be synchronized to an external clock..

The device output voltage is available as 5V fixed or adjustable from 4V to 25V. The wide input voltage range, along with its ability to maintain constant output voltage during battery transients, makes the device ideal for automotive applications. In light load applications, a logic input (FSYNC) allows the devices to operate in fixed-frequency, forced-PWM mode to eliminate frequency variaion and help minimize EMI. Protection features include cycle-by-cycle current limit followed by hiccup during sustained overloads, input under-voltage lockout (UVLO), out- put overvoltage protection and thermal shut- down with automatic recovery.

The MAX25431 is available in a small 4mm x 4mm 24-pin TQFN-EP SW package.

MAX25431: Typical Application Circuit MAX25431: Typical Application Circuit Enlarge+

Key Features

  • Meets Stringent Automotive Quality and Reliability Requirements
    • Operating VIN Range: 2V to 36V Allows Operation in Cold-Crank Conditions
    • Tolerates Input Transients to 40V
    • EN Pin Compatible from +3.3V to +40V
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified
  • Efficient Solution in a Small Solutions Size
    • Fixed 5V Output Voltage and Adjustable 3V to 25V
    • High Switching Frequency Allows Use of Small External Components
    • Small 4mm x 4mm 24-Pin SWTQFN Package
  • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements
    • 10µA (max) Quiescent Current in Shutdown
  • EMI Mitigation to meet CISPR25 Class 5 Requirements
    • 220kHz to 2.2MHz Operating Frequency
    • Fixed-Frequency PWM Mode
    • External Frequency Synchronization or SYNC OUT Capability

Applications/Uses

  • Dedicated Charging Modules
  • Rear-Seat Entertainment Modules
  • USB Hubs, Breakout Boxes and Multimedia Hubs

Parametric Specs

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


Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		IOUT1
(A)
(min)(max)(min)(max)
MAX25431 NEW!24030.6

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.

Design Resources


MAX25431EVKIT: Evaluation Kit for the MAX25431

Quality And Environmental

Request Reliability Report for: MAX25431 
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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Reference Designs

Type ID Title
Evaluation Board10671MAX25431EVKIT Evaluation Kit for the MAX25431