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MAX16904
2.1MHz, High-Voltage,
600mA Mini-Buck Converter
General Description
Features
● Wide +3.5V to +28V Input Voltage Range
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.
● Tolerates Input Voltage Transients to +42V
● 600mA Minimum Output Current with Overcurrent
Protection
● Fixed Output Voltages (See the Selector Guide and
Contact Factory for All Available Trimmed Output
Voltage Options)
● 2.1MHz Switching Frequency with Three Modes
of Operation
The MAX16904 operates at a 2.1MHz frequency, allow-
ing 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.
• 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
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.
● -40°C to +125°C Automotive Temperature Range
● 10-Pin TDFN-EP or 16-Pin TSSOP-EP Packages
● AEC-Q100 Qualified
Applications
● Automotive
● Industrial
● Military
Ordering Information
SPREAD
SPECTRUM RANGE PACKAGE
TEMP PIN-
PART
● High-Voltage Input-Power DC-DC Applications
-40°C to
MAX16904RATB__/V+
Disabled
10 TDFN-EP*
16 TSSOP-EP*
10 TDFN-EP*
16 TSSOP-EP*
+125°C
-40°C to
+125°C
MAX16904RAUE__/V+ Disabled
-40°C to
+125°C
Selector Guide appears at end of data sheet.
MAX16904SATB__/V+
Enabled
Enabled
-40°C to
+125°C
MAX16904SAUE__/V+
Note: Insert the desired suffix letters (from Selector Guide)
into the blanks to indicate the output voltage.
Alternative output voltages available upon request.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
*EP = Exposed pad.
19-5481; Rev 15; 12/18