LP2983 Datasheet, PDF (13/25 Pages) National Semiconductor (TI) – Micropower 150 mA Voltage Regulator in SOT-23 Package For Output Voltages 1.2V Designed for Use with Very Low ESR Output Capacitors

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8 Application and Implementation
LP2983
SNVS170D – OCTOBER 2001 – REVISED APRIL 2016
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 (V_IN – V_OUT) 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
VIN
IN
1 µF
OUT
VOUT
GND
2.2 µF
ON/OFF*
ON/OFF
ESR
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*ON/OFF input must be actively terminated. Tie to V_IN 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:
PARAMETER
Input voltage
Output voltage
Output current
Output tolerance (1 mA ≤ I_L ≤ 50 mA at
25°C)
Table 1. Design Parameters
DESIGN REQUIREMENT
2.2 V to 16 V
1V or 1.2 V
0 mA to 150 mA
±1.5% (±1% with A-grade version)
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