MAX16904

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


Description

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.
MAX16904: Functional Diagram MAX16904: Functional Diagram Enlarge+

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

Applications/Uses

  • Automotive
  • High-Voltage Input-Power DC-DC Applications
  • Industrial
  • Military
Part Number VIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. Method IOUT1
(A)
Switch Type Synchronous Switching Power Good Signal DC-DC Outputs Oper. Freq.
(kHz)
Budgetary
Price
min max min max max See Notes
MAX16904  3.5 28 3.3 5
3.3
5
Preset 0.6 Internal Yes Yes 1 2100 $3.25 @1k
See All Step-Down Switching Regulators (320)
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.


MAX16904EVKIT: Evaluation Kit for the MAX16904

Technical Documents

App Note 4944 Layout Guidelines Maximize Automotive Power-Supply Performance and Minimize Emissions

Quality and Environmental Data

Product Reliability Reports: MAX16904.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX16904
 

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