LD1117AXX Datasheet, PDF (1/29 Pages) STMicroelectronics – Low drop fixed and adjustable positive voltage regulators

LD1117Axx
Low drop fixed and adjustable positive voltage regulators
Features
■ Low dropout voltage
(1.15 V typ. @ I_OUT = 1 A, 25 °C)
■ Very low quiescent current
(5 mA typ. @ 25 °C)
■ Output current up to 1 A
■ Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,
3.3 V
■ Adjustable version availability (V_REL = 1.25 V)
■ Internal current and thermal limit
■ Only 10 µF for stability
■ Available in ± 2 % (at 25 °C) and 4 % in full
temperature range
■ High supply voltage rejection:
– 80 dB typ. (at 25 °C)
■ Temperature range: 0 °C to 125 °C
Description
The LD1117A is a low drop voltage regulator able
to provide up to 1 A of output current, available
even in adjustable version (V_REF = 1.25 V).
Concerning fixed versions, are offered the
following Output Voltages: 1.2 V, 1.8 V, 2.5 V and
3.3 V. The device is supplied in: SOT-223, DPAK,
D^²PAK/A and TO-220. Surface mount packages
optimize the thermal characteristics even offering
a relevant space saving effect. High efficiency is
assured by NPN pass transistor. Only a very
common 10 µF minimum capacitor is needed for
TO-220
SOT-223
DPAK
D²PAK/A
stability. Only chip trimming allows the regulator to
reach a very tight output voltage tolerance, within
± 2 % at 25 °C.
Table 1. Device summary
April 2008
LD1117AXX12
LD1117AXX18
LD1117AXX25
Part numbers
Rev 20
LD1117AXX33
LD1117AXX
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