LP3981IMM-2.5/NOPB National Semiconductor, LP3981IMM-2.5/NOPB Datasheet - Page 5

• Manufacturer Part Number: LP3981IMM-2.5/NOPB
• Description: IC REG LDO 300MA 2.5V 8MSOP
• Manufacturer: National Semiconductor

Specifications of LP3981IMM-2.5/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.5V
• Voltage - Input: 2.7 ~ 6 V
• Voltage - Dropout (typical): 0.132V @ 300mA
• Number Of Regulators: 1
• Current - Output: 300mA
• Current - Limit (min): 300mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3981IMM-2.5; LP3981IMM-2.5TR

V
T
Symbol
C
ON
IH
OUT
Electrical Characteristics
Unless otherwise specified: V
cal values and imits appearing in standard typeface are for T
junction temperature range for operation, −40˚C to +125˚C. (Notes 6, 7)
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: The figures given for Absolute Maximum Power disipation for the device are calculated using the following equations:
where T
E.g. for the LLP package θ
−20mW/˚C, thus below 25˚C the power dissipation figure can be increased by 20W per degree, and similarity decreased by this factor for temperatures above 25˚C
Note 4: The human body model is 100pF discharged through 1.5kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each
pin.
Note 5: As for the Maximum Power dissipation, the maximum power in operation is dependant on the ambient temperature. This can be calculated in teh same way
using T
Note 6: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with T
Statistical Quality Control (SQC) methods. All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations
and applying statistical process control.
Note 7: The target output voltage, which is labeled V
Note 8: An increase in the load current results in a slight decrease in the output voltage and vice versa.
Note 9: Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification does not apply for
input voltages below 2.5V.
Note 10: Guaranteed by design.
Note 11: Turn-on time is time measured between the enable input just exceeding V
Note 12: For V
i.e. I
Output Capacitor, Recommended Specification
Symbol
Q(MAX)
J
J(MAX)
=125˚C, giving 2W as the maximum power dissipation for the LLP package in operation. The same derating factor applies.
= 210 + ((V
Logic High Input threshold
Turn-On Time
(Note 10) (Note 11)
is the maximum junction temperature, T
Parameter
Output Capacitor
OUT
>
2.5C, Increase I
OUT(NOM)
JA
Parameter
=50˚C/W, T
- 2.5) * 25)µA
EN
Q(MAX)
= 1.2V, V
J(MAX)
FIGURE 1. Line Transient Response Input Perturbation
by 2.5µA for every 0.1V increase in V
=150˚C and using T
OUT(nom)
IN
A
(Continued)
is the ambient temperature, and θ
= V
V
C
Conditions
Capacitance
ESR
IN
BYPASS
OUT
, is the desired voltage option.
= 2.7 to 6.0V
+ 0.5V, C
A
=25˚C the maximum power dissipation is found to be 2.5W. The derating factor (−1/θ
= 0.033 µF
Conditions
J
= 25˚C. Limits appearing in boldface type apply over the entire
IN
5
= 2.2 µF, C
OUT(NOM)
IH
and the output voltage just reaching 95% of its nominal value.
JA
.
is the junction-to-ambient thermal resistance.
BP
= 0.033 µF, I
Typ
Typ
240
OUT
= 1mA, C
2.2
5
Min
Min
1.4
J
Limit
Limit
= 25˚C or correlated using
OUT
22
500
Max
Max
350
= 2.2 µF. Typi-
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20020308
Units
µF
mΩ
Units
µs
JA
V
) =