| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $14.40 | $14.40 |
| 10+ | $13.20 | $132.00 |
| 500+ | $12.00 | $6,000.00 |
| 1000+ | $11.40 | $11,400.00 |
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The LT1117IST-3.3#PBF is a low-dropout (LDO) linear voltage regulator from Analog Devices, providing a fixed 3.3V output with up to 800mA load current. The LT1117 family is characterized by low dropout voltage—typically 1.1V at full load—allowing regulation from input supplies as low as 4.4V. Housed in a SOT‑223 surface‑mount package, the device incorporates an internal thermal tab to facilitate heat sinking, supporting sustained output current when mounted on adequate PCB copper area. The fixed 3.3V output and fast transient response make it well-suited for post‑regulating switch‑mode converters and powering noise‑sensitive analog circuits.
Typical deployments include industrial automation controllers, embedded computing platforms, avionics instrumentation, and defense electronics where a stable 3.3V rail is required for processors, FPGAs, or sensor signal chains. The design is also used in point‑of‑load regulation for high‑reliability systems that demand excellent line and load regulation without complex external compensation. The “IST” suffix denotes an industrial temperature range of -40°C to +125°C, and the #PBF marking confirms lead‑free, RoHS‑compliant termination. As an industrial‑grade device, it is not MIL‑PRF‑38535 qualified; procurement engineers for military or space applications should review Analog Devices’ product lifecycle status and consider the availability of alternative screened variants if higher reliability grade is required. Long‑term availability is typically stable for this active product family, but verification of end‑of‑life notices is recommended for protracted programs.
| Attribute | Value |
|---|---|
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 15V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage Dropout (Max) | 1.3V @ 800mA |
| Current - Output | 800mA |
| Current - Quiescent (Iq) | 10 mA |
| PSRR | 75dB (120Hz) |
| Protection Features | Over Temperature |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | TO-261-4, TO-261AA |
| Supplier Device Package | SOT-223-3 |
Download the current available datasheet for LT1117IST-3.3#PBF.
Download Datasheet 
