LP2985IM5-1.8 National Semiconductor, LP2985IM5-1.8 Datasheet - Page 7

• Manufacturer Part Number: LP2985IM5-1.8
• Description: IC, LDO VOLT REG, 1.8V, 150mA, 5-SOT-23
• Manufacturer: National Semiconductor

Specifications of LP2985IM5-1.8

• Primary Input Voltage: 16V
• Output Voltage Fixed: 1.8V
• No. Of Pins: 5
• Output Current: 150mA
• Operating Temperature Range: -40°C To +125°C
• Termination Type: SMD
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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I
I
O
O
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(SC)
(PK)
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 for the SOT-23 package, or pins 5 and 2 for the micro SMD package, is 1 kV.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T
A
Where the value of θ
allowable dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.
Note 4: For 12V option, output voltage survival: -0.3 to +16V. If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2985
output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V
will turn on this diode.
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: The LP2985 has foldback current limiting which allows a high peak current when V
forced to ground (see Typical Performance Characteristics curves).
Note 10: Exposing the micro SMD device to direct sunlight will cause misoperation. See Application Hints for additional information.
, and the ambient temperature, T
Symbol
Output Noise
Voltage (RMS)
Ripple Rejection
Short Circuit Current
Peak Output Current
J-A
for the SOT-23 package is 220°C/W in a typical PC board mounting and the micro SMD package is 225°C/W. Exceeding the maximum
Parameter
A
. The maximum allowable power dissipation at any ambient temperture is calculated using:
BW = 300 Hz to 50 kHz,
C
C
f = 1 kHz, C
C
R
(Note
V
OUT
OUT
BYPASS
OUT
L
= 0 (Steady State)
≥
= 10 µF
= 10 µF
9)
V
= 10 nF
Conditions
o
(NOM) −5%
BYPASS
IN
to V
OUT
= 10 nF
terminals that is normally reverse-biased. Reversing the polarity from V
7
OUT
Typ
400
350
30
45
> 0.5V, and then reduces the maximum output current as V
LP2985AI-X.X
Min
J
(MAX), the junction-to-ambient thermal resistance, θ
(Note
6)
Max
Min
LP2985I-X.X
(Note
6)
Max
www.national.com
IN
to V
Units
OUT
OUT
mA
mA
µV
dB
J-
is