2.1MHz, High-Voltage, 600mA Mini-Buck Converter

600mA Automotive Buck Converter Integrates High-Side and Low-Side FETs and Uses Only 25µA Quiescent Current
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Status Explanations for product status codes

Part Number Status
MAX16904 Active: In Production.


The MAX16904 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver 600mA with input voltages from +3.5V to +28V while using only 25µA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signal. The MAX16904 can operate in dropout by running at 97% duty cycle, making it ideal for automotive and industrial applications.

The MAX16904 operates at a 2.1MHz frequency, allowing for small external components and reduced output ripple. It guarantees no AM band interference. SYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, SKIP mode (ultra-low quiescent current of 25µA), and synchronization to an external clock. The MAX16904 can be ordered with spread-spectrum frequency modulation, designed to minimize EMI-radiated emissions due to the modulation frequency.

The MAX16904 is available in a thermally enhanced, 3mm x 3mm, 10-pin TDFN package or a 16-pin TSSOP package. The MAX16904 operates over the -40°C to +125°C automotive temperature range.

Data Sheet

Download this datasheet in PDF formatDownload Rev 8 (PDF, 522.8kB)
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An evaluation board is available: MAX16904EVKIT

Key Features

  • Wide +3.5V to +28V Input Voltage Range
  • Tolerates Input Voltage Transients to +42V
  • 600mA Minimum Output Current with Overcurrent Protection
  • Fixed Output Voltages (See the Selector Guide in the full data sheet and Contact Factory for All Available Trimmed Output Voltage Options)
  • 2.1MHz Switching Frequency with Three Modes of Operation
    • 25µA Ultra-Low Quiescent Current SKIP Mode
    • Forced Fixed-Frequency Operation
    • External Frequency Synchronization
  • Optional Spread-Spectrum Frequency Modulation
  • Power-Good Output
  • Enable-Pin Compatible from +3.3V Logic Level to +42V
  • Thermal Shutdown Protection
  • -40°C to +125°C Automotive Temperature Range
  • 10-Pin TDFN-EP or 16-Pin TSSOP-EP Packages
  • AEC-Q100 Qualified


  • Automotive
  • High-Voltage Input-Power DC-DC Applications
  • Industrial
  • Military

Key Specifications:

Step-Down Switching Regulators
Part Number VIN
Preset VOUT
Output Adjust. Method IOUT1 (max)
Switch Type Synchronous Switching Power Good Signal DC-DC Outputs Oper. Freq.
min max min max See Notes
MAX16904  3.5 28 3.3 5
Preset 0.6 Internal Yes Yes 1 2100 $3.25 @1k
See All Step-Down Switching Regulators (310)

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.


MAX16904: Functional Diagram
Functional Diagram

More Information

Topmark Coding MAX16904
New Product Press Release   2010-12-07 ]

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Document Ref.: 19-5481 Rev 8; 2014-01-07
This page last modified: 2014-01-07