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PDF LD1117 Data sheet ( Hoja de datos )
| Número de pieza | LD1117 | |
| Descripción | Adjustable and fixed low drop positive voltage regulator | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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LD1117
Adjustable and fixed low drop positive voltage regulator
TO-220
DPAK
Datasheet - production data
flows mostly into the load. Only a very common
10 µF minimum capacitor is needed for stability.
On chip trimming allows the regulator to reach a
very tight output voltage tolerance, within ± 1 % at
25 °C. The adjustable LD1117 is pin to pin
compatible with the other standard. Adjustable
voltage regulators maintaining the better
performances in terms of drop and tolerance.
SOT-223
SO-8
Features
• Low dropout voltage (1 V typ.)
• 2.85 V device performances are suitable for
SCSI-2 active termination
• Output current up to 800 mA
• Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,
3.3 V, 5.0 V
• Adjustable version availability (VREF = 1.25 V)
• Internal current and thermal limit
• Available in ± 1 % (at 25 °C) and 2 % in full
temperature range
• Supply voltage rejection: 75 dB (typ.)
Description
The LD1117 is a low drop voltage regulator able
to provide up to 800 mA of output current,
available even in adjustable version (VREF =
1.25 V). Concerning fixed versions, are offered
the following output voltages: 1.2 V, 1.8 V, 2.5 V,
2.85 V, 3.3 V and 5.0 V. The device is supplied in:
SOT-223, DPAK, SO-8 and TO-220. The SOT-
223 and DPAK surface mount packages optimize
the thermal characteristics even offering a
relevant space saving effect. High efficiency is
assured by NPN pass transistor. In fact in this
case, unlike than PNP one, the quiescent current
November 2013
This is information on a product in full production.
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LD1117
1 Diagram
Figure 1. Block diagram
Diagram
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LD1117
Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Symbol
Table 5. Electrical characteristics of LD1117#25
Parameter
Test condition
Min.
Typ. Max.
Unit
VO Output voltage
VO Output voltage
ΔVO Line regulation
ΔVO Load regulation
ΔVO Temperature stability
ΔVO Long term stability
Vin Operating input voltage
Id Quiescent current
IO Output current
eN Output noise voltage
SVR Supply voltage rejection
Vd Dropout voltage
Thermal regulation
Vin = 4.5 V, IO = 10 mA, TJ = 25 °C
IO = 0 to 800 mA, Vin = 3.9 to 10 V
Vin = 3.9 to 10 V, IO = 0 mA
Vin = 3.9 V, IO = 0 to 800 mA
1000 hrs, TJ = 125 °C
IO = 100 mA
Vin ≤ 10 V
Vin = 7.5 V TJ = 25 °C
B = 10 Hz to 10 kHz, TJ = 25 °C
IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 5.5 V, Vripple = 1 VPP
IO = 100 mA
IO = 500 mA
IO = 800 mA
Ta = 25 °C, 30 ms Pulse
2.475
2.45
800
2.5 2.525
2.55
16
1 10
0.5
0.3
15
5 10
950 1300
100
V
V
mV
mV
%
%
V
mA
mA
µV
60 75
dB
1 1.1
1.05 1.15 V
1.10 1.2
0.01 0.1 %/W
DocID2572 Rev 33
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LD1117.PDF ] | |
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