LP38690DT-3.3/NOPB National Semiconductor, LP38690DT-3.3/NOPB Datasheet - Page 13
![IC REG LDO 1A 3.3V TO-252](/photos/12/65/126582/td03b_sml.jpg)
LP38690DT-3.3/NOPB
Manufacturer Part Number
LP38690DT-3.3/NOPB
Description
IC REG LDO 1A 3.3V TO-252
Manufacturer
National Semiconductor
Series
PowerWise®r
Specifications of LP38690DT-3.3/NOPB
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 10V
Voltage - Dropout (typical)
0.65V @ 1A
Number Of Regulators
1
Current - Output
1A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-252-2, DPak (2 Leads + Tab), TO-252AA, SC-63
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
*LP38690DT-3.3
*LP38690DT-3.3/NOPB
LP38690DT-3.3
*LP38690DT-3.3/NOPB
LP38690DT-3.3
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP38690DT-3.3/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
Application Hints
OUTPUT NOISE
Noise is specified in two ways: Spot Noise or Output Noise
Density is the RMS sum of all noise sources, measured at
the regulator output, at a specific frequency (measured with
a 1Hz bandwidth). This type of noise is usually plotted on a
curve as a function of frequency. Total Output Noise or
Broad-Band Noise is the RMS sum of spot noise over a
specified bandwidth, usually several decades of frequencies.
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13
Attention should be paid to the units of measurement. Spot
noise is measured in units µV/root-Hz or nV/root-Hz and total
output noise is measured in µV(rms)
The primary source of noise in low-dropout regulators is the
internal reference. Noise can be reduced in two ways: by
increasing the transistor area or by increasing the current
drawn by the internal reference. Increasing the area will
decrease the chance of fitting the die into a smaller package.
Increasing the current drawn by the internal reference in-
creases the total supply current (ground pin current).
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