4

8

3

6

5

1

2

7

LM5007

VCC

FB

SW

BST

VIN

RCL

RTN

RON

Shutdown

VIN

12V-75V

VOUT

L1

D1

200

NŸ

100

NŸ

0.01µF

100µH

1µF

0.1µF

0.1µF

3.01

NŸ

1

NŸ

15µF

1

Ÿ

LM5007

www.ti.com

SNVS252G – SEPTEMBER 2003 – REVISED NOVEMBER 2015

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LM5007 is a step down converter DC-DC converter. The LM5007 device is step-down DC-DC converter.

The device is typically used to convert a higher DC voltage to a lower DC voltage with a maximum available

output current of 500 mA. Use the following design procedure to select component values for the LM5007 device.

Alternately, use the WEBENCH® software to generate a complete design. The WEBENCH software uses an

iterative design procedure and accesses a comprehensive database of components when generating a design.

This section presents a simplified discussion of the design process.

8.2 Typical Application

The application schematic of an LM5007 based buck converter is shown in Figure 7. For an output voltage

Figure 7. 12-V to 75-V Input and 10-V, 400-mA Output Buck Converter

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 2 as the input parameters.

Table 2. Design Parameters

DESIGN PARAMETERS

VALUE

Input Voltage

15 V to 75 V

Output Voltage

10 V

Maximum Output Current

400 mA

Nominal Switching Frequency

380 kHz

Copyright © 2003–2015, Texas Instruments Incorporated

Submit Documentation Feedback

13

Product Folder Links: LM5007