LMR16006

5 V, 0.6 A

CB

SW

FB

Cboot

100 nF

L1

22 µH

SHDN

VIN

VIN

GND

D1

Cin

R1

54.9 k

R2

10 k

Cout

10 µF

100 k



LMR16006

www.ti.com

SNVSA24 – OCTOBER 2014

9 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.

9.1 Application Information

The LMR16006 is a step down DC-to-DC regulator. It is typically used to convert a higher DC voltage to a lower

DC voltage with a maximum output current of 600 mA. The following design procedure can be used to select

components for the LMR16006. This section presents a simplified discussion of the design process.

9.2 Typical Application

Figure 9. Application Circuit, 5 V Output

9.2.1 Design Requirements

Table 1. Design Example Parameters

9 V to 16 V, Typical 12 V

5.0 V ± 3%

0.6 A

0.03 A

Transient Response 0.03 A to 0.6 A

5%

Output Voltage Ripple

1%

Switching Frequency Fsw

0.7 MHz

Target during Load Transient

Over Voltage Peak Value

106% of Output Voltage

Under Voltage Value

91% of Output Voltage

9.2.2 Detailed Design Procedure

This example details the design of a high frequency switching regulator using ceramic output capacitors. A few

parameters must be known in order to start the design process. These parameters are typically determined at the

system level:

9.2.2.1 Output Inductor Selection

The most critical parameters for the inductor are the inductance, peak current and the DC resistance. The

inductance is related to the peak-to-peak inductor ripple current, the input and the output voltages. Since the

ripple current increases with the input voltage, the maximum input voltage is always used to determine the

represents the amount of inductor ripple current relative to the maximum output current. A reasonable value is

setting the ripple current to be 30%-40% of the DC output current. For this design example, the minimum

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