MAX16903 Maxim Integrated Products, MAX16903 Datasheet

MAX16903

Manufacturer Part Number

MAX16903

Description

1A Mini-Buck Converter

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX16903.pdf (13 pages)

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DataSheet.in

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.

19-5038; Rev 1; 7/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

2.1MHz, High-Voltage, 1A Mini-Buck Converter

Automotive

Industrial

Military

High-Voltage Input-Power DC-DC Applications

________________________________________________________________ Maxim Integrated Products

General Description

Applications

o Wide +3.5V to +28V Input Voltage Range

o Tolerates Input Voltage Transients to +42V

o 1A Minimum Output Current with Overcurrent

o Fixed Output Voltages (+3.3V and +5V)

o 2.1MHz Switching Frequency with 3 Modes of

o Optional Spread-Spectrum Frequency Modulation

o Power-Good Output

o Enable-Pin Compatible from +3.3V Logic Level to

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

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.

MAX16903RAUE__/V+

MAX16903RATB__/V+

MAX16903SAUE__/V+

MAX16903SATB__/V+

Protection

Operation

+42V

25µA Ultra-Low Quiescent Current Skip Mode

Forced Fixed-Frequency Operation

External Frequency Synchronization

PART

Ordering Information

SPEC T R UM

SPREAD

Disabled

Enabled

RANGE

-40°C to

+125°C

TEMP

Features

PIN-

PACKAGE

16 TS S OP - E P *

10 TD FN -E P*

16 TS S OP - E P *

10 TD FN -E P*

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