MAX20098

Versatile Automotive 36V 2.2MHz Buck Controller with 3.5µA IQ

Industry's Lowest IQ Automotive Synchronous Step-Down Controller Uses Only 3.5µA of Quiescent Current at Light Loads


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Description

The MAX20098 is an automotive 2.2MHz synchronous step-down controller IC with 3.5µA IQ. This IC operates with an input-voltage supply from 3.5V to 42V and can operate in dropout condition by running at 99% 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 IC’s step-down controller operates at up to 2.2MHz frequency to allow small external components, reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor adjustable (220kHz to 2.2MHz). FSYNC 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 IC also provides a SYNC output to enable two controllers to operate in parallel. The IC has a factory-programmable spread-spectrum option for frequency modulation to minimize EMI interference.

The IC features a PGOOD monitor for undervoltage. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20098 is specified for operation over the -40°C to +125°C automotive temperature range.
MAX20098 MAX20098 Enlarge+

Key Features

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 3.5µA Quiescent Current in Skip Mode at VOUT = 3.3V
    • ±1% Output-Voltage Accuracy: 5.0V/3.3V Fixed, or Adjustable Between 1V and 10V
  • Enables Crank-Ready Designs
    • Wide Input Supply Range from 3.5V to 42V
  • 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
    • Spread-Spectrum Option
    • Frequency-Synchronization Input
    • Resistor-Programmable Frequency Between 220kHz and 2.2MHz
  • Integration and Thermally Enhanced Packages Save Board Space and Cost
    • 2MHz Step-Down Controller
    • Current-Mode Controller with Forced-Continuous and Skip Modes
    • 16-Pin Side-Wettable (SW) TQFN-EP Package
    • 20A Reference Design Available
  • Protection Features Improve System Reliability
    • Supply Undervoltage Lockout
    • Overtemperature and Short-Circuit Protection
    • Output Overvoltage and Undervoltage Monitoring
    • -40°C to +125°C Grade 1 Automotive Temperature Range

Applications/Uses

  • General-Purpose Point-of-Load (POL)
  • Infotainment Systems
  • USB Hub
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/Pins
minmaxminmax
MAX20098 3.542110
3.3
5
Preset
Resistor
15ExternalYesYes1
220
250
275
300
330
350
400
440
500
540
560
600
700
750
800
1200
1700
2000
2100
2200
EE-Sim
TQFN-CU/16
See All Step-Down Switching Regulators (358)
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.


MAX20098EVKIT: Evaluation Kit for the MAX20098

Tools & Models

  • EE-Sim: Design & Simulate MAX20098
  • 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 >

     
    Status:
    Package:
    Temperature:

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