LTM8045

1

8045fa

For more information www.linear.com/8045

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Inverting or SEPIC µModule

DC/DC Converter with Up

to 700mA Output Current

converter that can be configured as a SEPIC or inverting

converter by simply grounding the appropriate output rail.

In a SEPIC configuration the regulated output voltage can

beabove,beloworequaltotheinputvoltage.TheLTM8045

includes power devices, inductors, control circuitry and

passive components. All that is needed to complete the

design are input and output capacitors, and small resis-

tors to set the output voltage and switching frequency.

Other components may be used to control the soft-start

and undervoltage lockout.

The LTM8045 is packaged in a compact (6.25mm ×

11.25mm) overmolded ball grid array (BGA) package suit-

able for automated assembly by standard surface mount

equipment. The LTM8045 is RoHS compliant.

L

, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered

trademarks and Soft-Start is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

APPLICATIONS

n

SEPIC or Inverting Topology

n

Wide Input Voltage Range: 2.8V to 18V

n

n

n

2.5V to 15V or –2.5V to –15V Output Voltage

n

Selectable Switching Frequency: 200kHz to 2MHz

n

Programmable Soft-Start™

n

User Configurable Undervoltage Lockout

n

6.25mm × 11.25mm × 4.92mm BGA Package

n

Battery Powered Regulator

n

Local Negative Voltage Regulator

n

Low Noise Amplifier Power

Use Two LTM8045s to Generate ±5V

4.7µF

2.8VDC TO 18VDC

–5V

5V

FB

RUN

LTM8045

SS

RT

SYNC

GND

60.4k

22µF

130k

FB

8045 TA01b

RUN

LTM8045

SS

RT

SYNC

GND

45.3k

100µF

115k

Maximum Output Current

vs Input Voltage

INPUT VOLTAGE (V)

100

700

600

800

200

300

500

400

8045 TA01b

2

8

10

4

6

12

14

16

18