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MAX16920

MAX16920

Automotive Power-Management IC with Three Step-Down Converters and Linear Regulator

4-Channel, High-Frequency Automotive Power Supply has Overvoltage Protection

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Overview

Description

The MAX16920 power-management IC integrates three high-voltage step-down DC-DC converters, one high-voltage linear regulator, and an overvoltage protection block. The three step-down converters deliver up to 150mA, 600mA, and 1.5A, while the linear regulator is capable of up to 150mA. The MAX16920 is designed to operate with input voltages between 5.5V to 28V and survive voltage transients to 45V, making it ideal for automotive applications.

The MAX16920 is optimized for high efficiency and low standby current. The MAX16920A features 400kHz switching frequency, while the MAX16920B features 2MHz switching frequency. The MAX16920 can be ordered with spread-spectrum frequency modulation. The DC-DC converters can also be synchronized to an external frequency reference using the SYNC input minimize EMI.

The MAX16920 includes power-good outputs (PG_) for DC-DC2, DC-DC3, LDOA, and a power-on reset (active-low POR) for DC-DC1. All regulators other than DC-DC1 have an enable input (EN_). DC-DC1 always operates when power is applied to the MAX16920.

The MAX16920 operates over the -40°C to +125°C temperature range, and is available in a compact, thermally enhanced 32-pin TQFN package (7mm x 7mm).
MAX16920A: Typical Operating Circuit MAX16920A: Typical Operating Circuit Enlarge+

Key Features

  • 5.5V to 28V Wide Operating Voltage Range
  • Tolerates Input Voltage Transients Up to 45V
  • Three High-Voltage Buck Converters with High Efficiency
  • DC-DC1: 150mA (max), Always-On, Ultra-Low Quiescent Current (25µA)
    • 3.3V Fixed or Adjustable from 1.22V to 5V
  • DC-DC2: 600mA (max), 5.0V Fixed or Adjustable Output Voltage from 1.22V to 5V
  • DC-DC3: 1.5A (max), 3.3V Fixed or Adjustable from 1.22V to 8.0V
  • One High-Voltage 5V Linear Regulator (150mA)
  • pMOS Driver Output with Fixed Overvoltage Shutdown
  • 400kHz (MAX16920A) or 2.2MHz (MAX16920B) Switching Frequency
  • Frequency Synchronization Input
  • Open-Drain Power-Good Outputs for DC-DC2, DC-DC3, LDOA, and Power-On Reset for DC-DC1
  • Enable Inputs for DC-DC2, DC-DC3, and LDO
  • Internal Soft-Start
  • ±2% Undervoltage Comparator
  • Overtemperature Shutdown
  • -40°C to +125°C Operating Temperature Range
  • Compact 32-Pin TQFN Package (7mm x 7mm)

Applications/Uses

  • Automotive Navigation Systems
  • Automotive Radios

Parametric Specs

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		Output Adjust. MethodIOUT1
(A)		Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)		Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX16920 4281.228
3.3
5
Preset
Resistor
1.5InternalYes3
400
2200
TQFN/32
$5.21 @1k
See All Step-Down Switching Regulators (380)
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


MAX16920BEVKIT: Evaluation Kit for the MAX16920A and MAX16920B

Quality and Environmental Data

Request Reliability Report for: MAX16920 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX16920BATJ/V+
  • MAX16920BATJ/V+T
    •

    Quality And Environmental

    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >

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    Reference Designs

    Type ID Title
    Evaluation Board7271MAX16920BEVKIT Evaluation Kit for the MAX16920A and MAX16920B