LP38690DT-1.8/NOPB National Semiconductor, LP38690DT-1.8/NOPB Datasheet - Page 13

• Manufacturer Part Number: LP38690DT-1.8/NOPB
• Description: IC REG LDO 1A 1.8V TO-252
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP38690DT-1.8/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: Up to 10V
• Voltage - Dropout (typical): 0.95V @ 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-1.8; *LP38690DT-1.8/NOPB; LP38690DT-1.8

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.
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)
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The primary source of noise in low-dropout regulators is the
internal reference. Noise can be reduced in two ways: by in-
creasing 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 increases the total
supply current (ground pin current).
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