ON/OFF

ON/OFF*

GND

IN

ESR

OUT

VOUT

VIN

2.2 µF

1 µF

Copyright © 2016, Texas Instruments Incorporated

13

LP2983

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SNVS170D – OCTOBER 2001 – REVISED APRIL 2016

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Copyright © 2001–2016, Texas Instruments Incorporated

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 LP2983 is a linear voltage regulator operating from 2.2 V to 16 V on the input and regulates voltages

between

≤ 1.2 V with high accuracy and a 150-mA maximum output current. To achieve high efficiency, the

dropout voltage (VIN – VOUT) must be as small as possible. Successfully implementing an LDO in an application

depends on the application requirements. If the requirements are simply input voltage and output voltage,

compliance specifications (such as internal power dissipation or stability) must be verified to ensure performance.

8.2 Typical Application

*ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used.

**Minimum capacitance is shown to ensure stability (may be increased without limit). A ceramic capacitor is required

for output (see External Capacitors).

Figure 23. LP2983 Typical Application

8.2.1 Design Requirements

For typical voltage regulator applications, use the parameters listed in Table 1:

Table 1. Design Parameters

PARAMETER

DESIGN REQUIREMENT

Input voltage

2.2 V to 16 V

Output voltage

1V or 1.2 V

Output current

0 mA to 150 mA

Output tolerance (1 mA

≤ IL ≤ 50 mA at

25°C)

±1.5% (±1% with A-grade version)