lp2980im5-adjep National Semiconductor Corporation, lp2980im5-adjep Datasheet - Page 4

• Manufacturer Part Number: lp2980im5-adjep
• Description: Micropower Sot, 50 Ma Ultra Low-dropout Adjustable Voltage Regulator
• Manufacturer: National Semiconductor Corporation

www.national.com
Electrical Characteristics
Note 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.
Note 2: The ESD rating of pins 3 and 4 is 1 kV.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T
and the ambient temperature, T
The value of θ
will go into thermal shutdown.
Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2980-ADJ output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V
will turn on this diode (see Application Hints).
Note 6: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.
Note 8: The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.
Note 9: See Typical Performance Characteristics curves.
Typical Performance Characteristics
1V, I
test circuit is as shown in Basic Application Circuit.
Unless otherwise specified: T
L
= 1 mA, ON/OFF pin tied to V
J-A
Dropout Voltage vs. Temperature
Output Voltage vs. Temperature
for the SOT-23 package is 300˚C/W. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
A
= 25˚C, V
IN
, R
ADJ
IN
(Continued)
= V
= 86.6k, and
10000107
10000105
O
(NOM) +
IN
and V
OUT
terminals that is normally reverse-biased. Reversing the polarity from V
4
Dropout Voltage vs. Load Current
J
(MAX), the junction-to-ambient thermal resistance, θ
Dropout Characteristics
10000106
10000108
IN
to V
OUT
J-A
,