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LTM8022| Datasheet

By datasheet - November 4th, 2008

LTM8022| Datasheet

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LTM8022 1A, 36V DC/DC uModule FEATURES
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DESCRIPTION
The LTM 8022 is a complete 1A, DC/DC step-down power supply. Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range of 3.6V to 36V, the LTM8022 supports an output voltage range of 0.8V to 10V, and a switching frequency range of 200kHz to 2.4MHz, each set by a single resistor. Only the bulk input and output filter capacitors are needed to finish the design. The low profile package (2.82mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. The LTM8022 is packaged in a thermally enhanced, compact (11.25mm 9mm) and low profile (2.82mm) overmolded Land Grid Array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8022 is RoHS compliant.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Module is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.

Complete Step-Down Switch Mode Power Supply Wide Input Voltage Range: 3.6V to 36V 0.8V to 10V Output Voltage 1A Output Current Adjustable Switching Frequency: 200kHz to 2.4MHz Current Mode Control (e4) RoHS Compliant Package with Gold Pad Finish Programmable Soft-Start Tiny, Low Profile (11.25mm 9mm 2.82mm) Surface Mount LGA Package

APPLICATIONS
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Automotive Battery Regulation Power for Portable Products Distributed Supply Regulation Industrial Supplies Wall Transformer Regulation

TYPICAL APPLICATION
7VIN to 36VIN , 5V/1A ModuleTM Regulator
VIN* 7V TO 36V 2.2F VOUT 5V 1A 4.7F 80 SHARE BIAS PG RT GND SYNC ADJ 29.4k 93.1k 40
8022 TA01a

Efficiency and Power Loss
100 90 VIN = 12V 0.8 0.7 0.6 POWER LOSS (W) EFFICIENCY POWER LOSS 0.5 0.4 0.3 50 0.2 0.1 0.1 0.01 LOAD CURRENT (A) 1
8022 TA01b

VIN

VOUT

LTM8022 AUX RUN/SS

EFFICIENCY (%)

70 60

30 0.001

0

*RUNNING VOLTAGE RANGE. PLEASE REFER TO APPLICATIONS INFORMATION FOR START-UP DETAILS

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