LP2981IM5-3.3 Datasheet, PDF (2/24 Pages) Texas Instruments – LP2981-N Micropower 100 mA Ultra Low-Dropout Regulator in SOT-23 Package

LP2981-N
SNOS773K – MARCH 2000 – REVISED APRIL 2013
Connection Diagram
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Figure 1. 5-Lead Small Outline Package (SOT-23)
Top View
See Package Number DBV0005A
Name
V_IN
GND
ON/OFF
N/C
V_OUT
Pin
Number
1
2
3
4
5
PIN DESCRIPTIONS
Function
Input Voltage
Common Ground (device substrate)
Logic high enable input
Post package trim - do not connect to this pin
Regulated output voltage
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS⁽¹⁾⁽²⁾
Storage Temperature Range
Operating Junction Temperature Range
Lead Temperature (Soldering, 5 sec.)
ESD Rating⁽³⁾
Power Dissipation⁽⁴⁾
Input Supply Voltage (Survival)
Input Supply Voltage (Operating)
Shutdown Input Voltage (Survival)
Output Voltage (Survival⁽⁵⁾)
I_OUT (Survival)
Input-Output Voltage (Survival,⁽⁶⁾)
−65°C to +150°C
−40°C to +125°C
260°C
2 kV
Internally Limited
−0.3V to +16V
2.1V to +16V
−0.3V to +16V
−0.3V to +9V
Short Circuit Protected
−0.3V to +16V
(1) Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply
when operating the device outside of its rated operating conditions.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(3) The ESD rating of pins 3 and 4 for the SOT-23 package is 1 kV.
(4) The maximum allowable power dissipation is a function of the maximum junction temperature, T_J(MAX), the junction-to-ambient thermal
resistance, θ_JA, and the ambient temperature, T_A. The maximum allowable power dissipation at any ambient temperature is calculated
using:
The value of θ_JA for the SOT-23 package is 220°C/W. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
(5) If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2981-N output must be diode-clamped
to ground.
(6) The output PNP structure contains a diode between the V_IN and V_OUT terminals that is normally reverse-biased. Reversing the polarity
from V_IN to V_OUT will turn on this diode (see APPLICATION HINTS).
2
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