LD1117DTTR

LD1117DTTR is a low-dropout linear regulator from the LD1117 family. Key points:
- Delivers up to about 1 A with a dropout around 1.1–1.3 V at full load.
- Available in fixed outputs (e.g., 3.3 V, 5.0 V) and adjustable versions (roughly 1.25–5.0 V).
- Input voltage up to about 15 V; includes protection features like current limit and thermal shutdown.
- DTTR suffix denotes a specific package/reel code used by manufacturers (check the datasheet for exact packaging).
- Requires input and output capacitors for stability (typical 10 µF or larger with low ESR; place close to the regulator).
- Pinout (front view): left = ADJ/GND, middle = Vout, right = Vin.
- Common uses: simple, cost-effective 5 V/3.3 V rails for microcontrollers, sensors, and logic; but it’s less efficient than switching regulators and will dissipate heat with large Vin−Vout or high current.
For exact voltage options and package details, consult the specific datasheet for your LD1117DTTR variant.

LD1117DTTR is a 1 A LDO regulator. Equivalents with the same pinout include:
- LM1117 (TI) and LM1117-3.3 / LM1117-5.0
- AMS1117 (Analog Devices) and AMS1117-3.3 / AMS1117-5.0
- AP1117 (Diodes Inc) and AP1117-3.3 / AP1117-5.0
- ADJ versions (LM1117-ADJ, AMS1117-ADJ)
These share similar performance and packaging.

Here are the typical features of the LD1117DTTR (common to LD1117 LDO family):
- 1 A low-dropout regulator (LDO)
- Fixed outputs (e.g., 3.3 V, 5.0 V, 1.8 V, 2.5 V) and adjustable versions (Vout ≈ 1.25–12 V)
- Input voltage range up to about 15 V
- Dropout voltage ~1.1–1.3 V at full load
- Requires output capacitor (typically 10–22 µF, low ESR) for stability
- Overcurrent/short-circuit protection and thermal shutdown
- Quiescent current around a few milliamps
- Good line and load regulation and output accuracy (typically a couple of percent)
- Available in small packages; DTTR indicates a Tape & Reel variant of the LD1117 in a 3-terminal package (SOT-223/TO-263 style)
Note: exact fixed output options and package variants may vary by supplier.

3 pins. It is a 1 A low-dropout positive voltage regulator (LDO) that provides a regulated output from a higher input (fixed versions like 3.3 V or 5 V, or adjustable in other variants). Pinout (front view): 1 = ADJ/GND, 2 = Vout, 3 = Vin.

LD1117DTTR is manufactured by STMicroelectronics. STMicroelectronics is a global semiconductor company (an electronics/IC maker) headquartered in Geneva, Switzerland. It designs and manufactures a wide range of ICs and discrete components, including microcontrollers, sensors, power management devices, and automotive ICs, serving automotive, industrial, and consumer markets.

LD1117DTTR is a low‑dropout linear regulator (fixed outputs such as 5V and 3.3V, plus adjustable versions). Common applications:
- Main power regulator for microcontrollers, digital ICs, sensors, and logic circuits
- Post-regulator for switching supplies to provide a clean, low-noise 3.3V/5V rail
- Portable or battery-powered devices requiring 3.3V/5V from higher voltages
- Embedded systems, consumer electronics, displays, audio, and instrumentation
- Prototyping and development boards requiring compact, inexpensive LDOs
Typically supports up to about 800 mA.

LD1117DTTR comes in a TO-263 (D2PAK) style surface-mount package; TR indicates Tape & Reel.