LD1117 Datasheet – 800mA, Low Drop Voltage Regulator

Part Number: LD1117,  LD1117V18,  LD1117V33,  LD1117V50

Function: Adjustable and fixed low drop positive voltage regulator

Package: TO-220, DPAK, SOT-223, SO-8 Type

Manufacturer: STMicroelectronics


LD1117 Voltage Regulator


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 flows mostly into the load. Only a very common 10 μF minimum capacitor is needed for stability.



LD1117 datasheet pinout


1. Low dropout voltage (1 V typ.)
2. 2.85 V device performances are suitable for SCSI-2 active termination
3. Output current up to 800 mA
4. Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V
5. Adjustable version availability (VREF = 1.25 V)
6. Internal current and thermal limit
7. Available in ± 1 % (at 25 °C) and 2 % in full temperature range
8. Supply voltage rejection: 75 dB (typ.)

Ordering Information

LD1117 ordering information


Official Homepage: https://www.st.com/en/power-management/ld1117.html

LD1117 Datasheet

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