# LT1761IS5-3#TRMPBF

**Analog Devices** · Linear Voltage Regulators (LDO) · TSOT-23-5

LT1761IS5-3#TRMPBF from Analog Devices, in a TSOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | power_in | Input pin that supplies power to the device over a 1.8V to 20V input range, with a 1μF to 10μF bypass capacitor recommended when the device is more than six inches from the main input filter capacitor. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | SHDN | input | Shutdown pin that switches the output off when pulled low, can be driven by 5V logic or an open-collector gate with a pull-up resistor, and must be connected to VIN if unused. |
| 4 | BYP | passive | Bypass pin clamped internally to ±0.6V from ground, where a capacitor up to 0.01μF from OUT lowers output noise to a typical 20μVRMS over 10Hz to 100kHz and the pin must be left unconnected if not used. |
| 5 | OUT | power_out | Output pin that supplies the load at up to 100mA, requiring a minimum 1μF output capacitor to prevent oscillations. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | TSOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Regulated Output Voltage LT1761-3 | VOUT | 2.96 | 3 | 3.04 | V | VIN = 3.5V, ILOAD = 1mA | 4 |
| Regulated Output Voltage LT1761-3 | VOUT | 2.93 | 3 | 3.07 | V | 4V < VIN < 20V, 1mA < ILOAD < 50mA | 4 |
| Regulated Output Voltage LT1761-3 | VOUT | 2.9 | 3 | 3.09 | V | 4V < VIN < 20V, 1mA < ILOAD < 100mA | 4 |
| Minimum Input Voltage | VIN(MIN) | 1.8 |  | 2.3 | V | ILOAD = 100mA | 4 |
| Absolute Maximum IN Pin Voltage | VIN | -20 |  | 20 | V |  | 2 |
| Absolute Maximum Input to Output Differential Voltage | VIN-VOUT | -20 |  | 20 | V |  | 2 |
| Absolute Maximum SHDN Pin Voltage | VSHDN | -20 |  | 20 | V |  | 2 |
| Operating Junction Temperature Range (I Grade) | TJ | -40 |  | 125 | °C | I Grade | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Lead Temperature (Soldering, 10 sec) |  |  |  | 300 | °C | Soldering, 10 sec | 2 |
| Dropout Voltage | VDROPOUT |  | 0.1 | 0.15 | V | ILOAD = 1mA | 5 |
| Dropout Voltage | VDROPOUT |  | 0.1 | 0.19 | V | ILOAD = 1mA (full operating temperature range) | 5 |
| Dropout Voltage | VDROPOUT |  | 0.17 | 0.22 | V | ILOAD = 10mA | 5 |
| Dropout Voltage | VDROPOUT |  | 0.17 | 0.29 | V | ILOAD = 10mA (full operating temperature range) | 5 |
| Dropout Voltage | VDROPOUT |  | 0.24 | 0.28 | V | ILOAD = 50mA | 5 |
| Dropout Voltage | VDROPOUT |  | 0.24 | 0.38 | V | ILOAD = 50mA (full operating temperature range) | 5 |
| Dropout Voltage | VDROPOUT |  | 0.3 | 0.35 | V | ILOAD = 100mA | 5 |
| Dropout Voltage | VDROPOUT |  | 0.3 | 0.45 | V | ILOAD = 100mA (full operating temperature range) | 5 |
| GND Pin Current | IGND |  | 20 | 45 | μA | VIN = VOUT(NOMINAL), ILOAD = 0mA | 6 |
| GND Pin Current | IGND |  | 55 | 100 | μA | VIN = VOUT(NOMINAL), ILOAD = 1mA | 6 |
| GND Pin Current | IGND |  | 230 | 400 | μA | VIN = VOUT(NOMINAL), ILOAD = 10mA | 6 |
| GND Pin Current | IGND |  | 1 | 2 | mA | VIN = VOUT(NOMINAL), ILOAD = 50mA | 6 |
| GND Pin Current | IGND |  | 2.2 | 4 | mA | VIN = VOUT(NOMINAL), ILOAD = 100mA | 6 |
| Line Regulation LT1761-3 |  |  | 1 | 10 | mV | ΔVIN = 3.5V to 20V, ILOAD = 1mA | 4 |
| Quiescent Current in Shutdown | IQ(SHDN) |  | 0.01 | 0.1 | μA | VIN = 6V, VSHDN = 0V | 6 |
| Output Voltage Noise | VN |  | 20 |  | μVRMS | COUT = 10μF, CBYP = 0.01μF, ILOAD = 100mA, BW = 10Hz to 100kHz | 6 |
| Current Limit | ILIM | 110 |  | 200 | mA | VIN = VOUT(NOMINAL) + 1V or 2.3V (Note 12), ΔVOUT = -5% | 6 |
| Input Reverse Leakage Current | IR |  |  | 1 | mA | VIN = -20V, VOUT = 0V | 6 |
| Reverse Output Current LT1761-3 | IRO |  | 10 | 20 | μA | VOUT = 3V, VIN < 3V | 6 |
| Ripple Rejection | RR | 55 | 65 |  | dB | VIN, VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 50mA | 6 |
| Thermal Resistance Junction-to-Ambient (package header) | θJA |  | 250 |  | °C/W | Package header value | 2 |
| Thermal Resistance Junction-to-Ambient (measured, 2500mm2 board and copper) | θJA |  | 125 |  | °C/W | 2500mm2 topside copper, 2500mm2 backside copper, 2500mm2 board area | 17 |

## CAD (KiCad official)

- Symbol: `LT1761IS5-3#TRMPBF`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-5`
- 3D model: TSOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lt1761is5-3-trmpbf-etched.step` / `lt1761is5-3-trmpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt1761is5-3-trmpbf.step` / `lt1761is5-3-trmpbf.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/1761sff.pdf) (22 pp, sha256 `5e4fc36c022415d2`, retrieved 2026-10-30, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lt1761is5-3-trmpbf-datasheet.pdf)