MAX16903_13 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 2.1MHz, High-Voltage, 1A Mini-Buck Converter

EVALUATION KIT AVAILABLE
MAX16903
2.1MHz, High-Voltage, 1A Mini-Buck Converter
General Description
The MAX16903 is a small, synchronous buck converter
with integrated high-side and low-side switches. The
device is designed to deliver 1A 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 MAX16903 can oper-
ate in dropout by running at 97% duty cycle, making it
ideal for automotive and industrial applications.
The MAX16903 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
MAX16903 can be ordered with spread-spectrum fre-
quency modulation, designed to minimize EMI-radiated
emissions due to the modulation frequency.
The MAX16903 is available in a thermally enhanced,
3mm x 3mm, 10-pin TDFN package or a 16-pin TSSOP
package. The MAX16903 operates over the -40°C to
+125°C automotive temperature range.
Applications
Automotive
Industrial
Military
High-Voltage Input-Power DC-DC Applications
Features
o Wide +3.5V to +28V Input Voltage Range
o Tolerates Input Voltage Transients to +42V
o 1A Minimum Output Current with Overcurrent
Protection
o Fixed Output Voltages (see the Selector Guide
and contact the factory for all available trimmed
output voltage options)
o 2.1MHz Switching Frequency with 3 Modes of
Operation
25µA Ultra-Low Quiescent Current Skip Mode
Forced Fixed-Frequency Operation
External Frequency Synchronization
o Optional Spread-Spectrum Frequency Modulation
o Power-Good Output
o Enable-Pin Compatible from +3.3V Logic Level to
+42V
o Thermal Shutdown Protection
o -40°C to +125°C Automotive Temperature Range
o 10-Pin TDFN-EP or 16-Pin TSSOP-EP Packages
o AEC-Q100 Qualified
Ordering Information
PART
SPREAD TEMP PIN-
SPECTRUM RANGE PACKAGE
MAX16903RAUE__/V+ Disabled ^{-40°C to} 16 TSSOP-EP*
+125°C
MAX16903RATB__/V+
Disabled
-40°C to
+125°C
10 TDFN-EP*
MAX16903SAUE__/V+ Enabled
-40°C to
+125°C
16 TSSOP-EP*
MAX16903SATB__/V+
Enabled
-40°C to
+125°C
10 TDFN-EP*
Note: Insert the desired suffix letters (from Selector Guide) into
the blanks to indicate the output voltage. Alternative output volt-
ages available upon request.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5038; Rev 4; 4/13