# LM39302R

**HTC Korea TAEJIN Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-5

LM39302R from HTC Korea TAEJIN Tech, in a TO-263-5. 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 | EN | input | TTL/CMOS-compatible chip enable: logic low (off) at or below 0.8 V and logic high (on) at or above 2.25 V, with the pin rated up to 20 V absolute maximum. |
| 2 | VIN | power_in | Input supply, specified from 2.25 V to 16 V with an absolute maximum of 20 V, and a 1 µF or greater input capacitor is recommended when the device is far from bulk supply capacitance or the supply is a battery. |
| 3 | GND | power_in | Ground reference pin for the regulator. |
| 4 | VOUT | power_out | Regulated 3 A PNP-based output that requires a low-ESR output capacitor of at least 47 µF for stability, with a 10 mA minimum load current needed for proper regulation. |
| 5 | ADJ | input | Output adjust pin for the LM39302 that sets the output via R1 = R2 × (VOUT / 1.250 − 1) against a 1.25 V reference; resistors up to 1 MΩ may be used because of its high input impedance. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | TO-263-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage tolerance (25°C) | VOUT | -1 |  | 1 | % | 10mA | 6 |
| Output Voltage tolerance (full temperature range) | VOUT | -2 |  | 2 | % | 10mA ≤ IOUT ≤ 3A, VOUT+1V ≤ VIN ≤8V | 6 |
| Line Regulation |  |  | 0.06 | 0.5 | % | IOUT=10mA, VOUT +1V ≤ VIN ≤ 8V | 6 |
| Load Regulation |  |  | 0.2 | 1 | % | VIN= VOUT +1V, 10mA ≤ IOUT ≤ 3A | 6 |
| Output Voltage Temp. Coefficient | ΔVOUT/ΔT |  | 20 | 100 | ppm/°C |  | 6 |
| Dropout Voltage | VDO |  | 80 | 200 | mV | IOUT=100mA, ΔVOUT = -1% | 6 |
| Dropout Voltage | VDO |  | 400 | 500 | mV | IOUT=3.0A, ΔVOUT = -1% | 6 |
| Ground Current | IGND |  | 10 | 20 | mA | IOUT=750mA, VIN= VOUT+1V | 6 |
| Enable Input Current (enabled) | IEN |  | 15 | 30 | μA | VEN= VIN | 6 |
| Enable Input Current (enabled, full temperature range) | IEN |  |  | 75 | μA | VEN= VIN | 6 |
| Enable Input Voltage logic low (off) | VEN |  |  | 0.8 | V | logic low (off) | 6 |
| Enable Input Voltage logic high (on) | VEN | 2.25 |  |  | V | logic high (on) | 6 |
| Enable Input Current (disabled) | IEN |  | 2 | 4 | μA | VEN=0.8V | 6 |
| Shutdown Output Current | IOUT(shdn) |  | 10 | 20 | uA | Note 7: VEN =0.8V, VIN = 8V, VOUT = 0V | 6 |
| Flag Output Leakage Current | IFLG (leak) |  | 0.01 | 1 | μA | VOH=16V | 6 |
| Flag Output Leakage Current (full temperature range) | IFLG (leak) |  |  | 2 | μA | VOH=16V | 6 |
| Flag Output Low Voltage | VFLG (do) |  | 220 | 300 | mV | VIN=2.25=V, IOL=250μA, (Note8) | 6 |
| Flag Output Low Voltage (full temperature range) | VFLG (do) |  |  | 400 | mV | VIN=2.25=V, IOL=250μA, (Note8) | 6 |
| Reference Voltage (LM39302) |  | 1.238 | 1.25 | 1.262 | V | Note 9: VREF ≤ VOUT ≤ (VIN - 1V), 2.25V ≤ VIN ≤ 16V, 10mA ≤ IL ≤ 3A | 7 |
| Reference Voltage (LM39302, -40°C ≤ TJ ≤ +125°C) |  | 1.225 |  | 1.275 | V | -40°C ≤ TJ ≤ +125°C; Note 9: VREF ≤ VOUT ≤ (VIN - 1V), 2.25V ≤ VIN ≤ 16V, 10mA ≤ IL ≤ 3A | 7 |
| Reference Voltage (LM39302, second range as printed) |  | 1.213 |  | 1.277 | V |  | 7 |
| Adjust Pin Bias Current |  |  | 40 | 80 | nA |  | 7 |
| Adjust Pin Bias Current (-40°C ≤ TJ ≤ +125°C) |  |  |  | 120 | nA | -40°C ≤ TJ ≤ +125°C | 7 |
| Supply Voltage | VIN | 2.25 |  | 16 | V |  | 2 |
| Enable Voltage | VEN | 2.25 |  | 16 | V |  | 2 |
| Junction Temperature | TJ | -40 |  | 125 | ℃ |  | 2 |
| Supply Voltage | VIN | -0.3 |  | 20 | V |  | 1 |
| Enable Voltage | VEN |  |  | 20 | V |  | 1 |
| Output Voltage | VOUT | -0.3 |  |  | V |  | 1 |
| Lead Temperature (Soldering, 5 sec) | TSOL |  |  | 260 | ℃ | 5 sec soldering | 1 |
| Storage Temperature Range | TSTG | -65 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-to-Ambient, TO-263 | θJA-TO-263 |  |  | 80 | °C/W | No heat sink / No air flow / No adjacent heat source / 20 mm2 copper area, TA=25°C | 12 |

## CAD (KiCad official)

- Symbol: `LM39302R`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `lm39302r-etched.step` / `lm39302r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm39302r.step` / `lm39302r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTC Korea TAEJIN Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586176006972952576) (12 pp, sha256 `1a625dcbfee7f54c`, retrieved 2026-10-18, tier: lcsc)
- **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/lm39302r-datasheet.pdf)