# LT3021ES8#PBF

**Analog Devices** · Linear Voltage Regulators (LDO) · SO-8

LT3021ES8#PBF from Analog Devices, in a SO-8. 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 | NC | unconnected | No connect; this pin may be left floating, tied to IN, or tied to GND. |
| 2 | OUT | power_out | Supplies power to the load and requires a minimum output capacitor of 3.3μF to prevent oscillations. |
| 3 | ADJ | input | Inverting input to the error amplifier with a 200mV reference referred to GND and a typical 20nA bias current flowing out of the pin. |
| 4 | AGND | power_in | Analog ground. |
| 5 | SHDN | input | Pulling this pin low turns the output off; it can be driven by logic or an open collector/drain with a pull-up resistor, should be connected to VIN if unused, and the device does not function if it is left unconnected. |
| 6 | PGND | power_in | Power ground. |
| 7 | NC | unconnected | No connect; this pin may be left floating, tied to IN, or tied to GND. |
| 8 | IN | power_in | Supplies power to the device, withstands reverse voltages with respect to ground and OUT, and needs a 3.3μF to 10μF bypass capacitor if it is more than six inches from the main input filter capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SO-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| ADJ Pin Voltage (VIN = 1.5V, ILOAD = 1mA) |  | 196 | 200 | 204 | mV | VIN = 1.5V, ILOAD = 1mA | 4 |
| ADJ Pin Voltage (full range) |  | 193 | 200 | 206 | mV | Full operating temperature range (l); 1.15V < VIN < 10V, 1mA < ILOAD < 500mA | 4 |
| Minimum Input Voltage |  |  | 0.9 | 1.05 | V | ILOAD = 500mA, TJ > 0°C | 4 |
| Minimum Input Voltage |  |  | 0.9 | 1.1 | V | ILOAD = 500mA, TJ < 0°C | 4 |
| Line Regulation (LT3021) |  | -1.75 | 0 | 1.75 | mV | Full operating temperature range (l); ΔVIN = 1.15V to 10V, ILOAD = 1mA | 4 |
| Load Regulation (LT3021) |  | -2 | 0.4 | 2 | mV | Full operating temperature range (l); VIN = 1.15V, ΔILOAD = 1mA to 500mA | 4 |
| Dropout Voltage |  |  | 45 | 75 | mV | ILOAD = 10mA | 4 |
| Dropout Voltage |  |  |  | 110 | mV | Full operating temperature range (l); ILOAD = 10mA | 4 |
| Dropout Voltage |  |  | 155 | 190 | mV | ILOAD = 500mA | 4 |
| Dropout Voltage |  |  |  | 285 | mV | Full operating temperature range (l); ILOAD = 500mA | 4 |
| GND Pin Current |  |  | 110 | 250 | μA | VIN = VOUT(NOMINAL) + 0.4V; ILOAD = 0mA | 4 |
| GND Pin Current |  |  | 920 |  | μA | VIN = VOUT(NOMINAL) + 0.4V; ILOAD = 10mA | 4 |
| GND Pin Current |  |  | 2.25 |  | mA | VIN = VOUT(NOMINAL) + 0.4V; ILOAD = 100mA | 4 |
| GND Pin Current |  |  | 6.2 | 10 | mA | VIN = VOUT(NOMINAL) + 0.4V; ILOAD = 500mA | 4 |
| ADJ Pin Bias Current |  |  | 20 | 50 | nA | VADJ = 0.2V, VIN = 1.2V | 4 |
| SHDN Pin Current |  |  | 3 | 9.5 | μA | VSHDN = 0V, VIN = 10V | 4 |
| SHDN Pin Current |  | -1 |  | 1 | μA | VSHDN = 10V, VIN = 10V | 4 |
| Quiescent Current in Shutdown |  |  | 3 | 9 | μA | VIN = 6V, VSHDN = 0V | 4 |
| Current Limit |  | 550 |  |  | mA | VIN = VOUT(NOMINAL) + 0.5V, ΔVOUT = -5%; full operating temperature range (l) | 4 |
| Current Limit |  |  | 1.8 |  | A | VIN = 10V, VOUT = 0V | 4 |
| Input Reverse Leakage Current |  |  | 1 | 20 | μA | VIN = -10V, VOUT = 0V | 4 |
| Reverse Output Current (LT3021) |  |  | 0.5 | 5 | μA | VOUT = 1.2V, VIN = 0V | 4 |
| IN Pin Voltage | VIN | -10 |  | 10 | V |  | 2 |
| OUT Pin Voltage | VOUT | -10 |  | 10 | V |  | 2 |
| Input-to-Output Differential Voltage |  | -10 |  | 10 | V |  | 2 |
| ADJ/SENSE Pin Voltage |  | -10 |  | 10 | V |  | 2 |
| SHDN Pin Voltage |  | -10 |  | 10 | V |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 300 | °C | 10 sec, S8 package | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C | S8 package | 2 |
| Maximum Junction Temperature | TJMAX |  |  | 150 | °C | S8 package | 2 |
| Operating Junction Temperature Range | TJ | -40 |  | 125 | °C | E and I grade | 2 |
| Input Voltage Range | VIN | 0.9 |  | 10 | V |  | 1 |
| Adjustable Output Voltage Range | VOUT | 0.2 |  | 9.5 | V | Adjustable output device | 10 |
| Junction-to-Ambient Thermal Resistance (S8) | θJA |  | 125 |  | °C/W | S8 package, *see Applications Information | 2 |
| Junction-to-Case Thermal Resistance (S8) | θJC |  | 40 |  | °C/W | S8 package, measured junction to pin 6 | 2 |
| Junction-to-Ambient Thermal Resistance (S8, measured) | θJA |  | 70 |  | °C/W | Board copper 2500mm2 topside, 2500mm2 backside, 2500mm2 board area | 12 |
| Junction-to-Ambient Thermal Resistance (S8, measured) | θJA |  | 78 |  | °C/W | Board copper 225mm2 topside, 2500mm2 backside, 2500mm2 board area | 12 |
| Junction-to-Ambient Thermal Resistance (S8, measured) | θJA |  | 84 |  | °C/W | Board copper 100mm2 topside, 2500mm2 backside, 2500mm2 board area | 12 |
| Junction-to-Ambient Thermal Resistance (S8, measured) | θJA |  | 96 |  | °C/W | Board copper 50mm2 topside, 2500mm2 backside, 2500mm2 board area | 12 |

## CAD (KiCad official)

- Symbol: `LT3021ES8#PBF`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `lt3021es8-pbf-etched.step` / `lt3021es8-pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt3021es8-pbf.step` / `lt3021es8-pbf.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/3021fc.pdf) (16 pp, sha256 `9be2a2fb292e277b`, retrieved 2026-10-31, 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/lt3021es8-pbf-datasheet.pdf)