# COS29302

**COSINE** · Linear Voltage Regulators (LDO) · TO-263-5L

COS29302 from COSINE, in a TO-263-5L. 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 | Enable input: logic-high turns the regulator on and logic-low shuts it down; CMOS/TTL compatible, with VIL max 0.8 V and VIH min 2.4 V. |
| 2 | IN | power_in | Supplies current to the output power device; input range is 4 V to 36 V per features, with absolute maximum +40 V and recommended supply +4.5 V to +26 V. |
| 3 | GND | power_in | Ground reference; the thermal tab must be connected to this same potential or left floating, and must not be tied to any other potential. |
| 4 | OUT | power_out | Regulator output voltage; a minimum 10 µF output capacitor is required at full load for stability. |
| 5 | ADJ | input | Adjustable feedback input connecting to the resistor divider from OUT to GND to set output voltage; bias current max 100 pA, and the resistor from VOUT to ADJ should not exceed 10 kΩ. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | TO-263-5L |
| Category | Power Supply Chip |
| 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 (IOUT=10mA) | VOUT | -1 |  | 1 | % | IOUT =10mA | 4 |
| Output Voltage (10mA to IFL, VOUT+1V <= VIN <= 26V) | VOUT | -2 |  | 2 | % | 10mA ≤ IOUT ≤ IFL, ( VOUT + 1V) ≤ VIN≤26V | 4 |
| Line Regulation |  |  | 0.3 | 1 | % | IOUT=10mA, ( VOUT + 1V) ≤ VIN≤26V | 4 |
| Load Regulation |  |  | 0.2 | 3 | % | 10mA≦IOUT≦1.5A | 4 |
| Output Voltage Temperature Coefficient | ΔVo/ΔT |  | 20 | 100 | ppm/°C |  | 4 |
| Dropout Voltage (IOUT=100mA) |  |  | 80 | 175 | mV | ΔVOUT = -1%, IOUT=100mA | 4 |
| Dropout Voltage (IOUT=3A) |  |  | 370 | 600 | mV | ΔVOUT = -1%, IOUT=3A | 4 |
| Current Limit | ILIM |  | 4 | 4.8 | A | VOUT=0V | 4 |
| Ground Current in Shutdown |  |  | 5 | 75 | nA |  | 4 |
| Reference Voltage |  | 1.22 | 1.24 | 1.252 | V |  | 4 |
| Adjust Pin Bias Current |  |  |  | 100 | pA |  | 4 |
| Input Logic Voltage Low (OFF) |  |  |  | 0.8 | V |  | 4 |
| Input Logic Voltage High (ON) |  | 2.4 |  |  | V |  | 4 |
| Enable Pin Input Current (VEN=0.8V) |  |  |  | 24 | pA | VEN=0.8V | 4 |
| Enable Pin Input Current (VEN=26V) |  |  |  | 3 | nA | VEN=26V | 4 |
| Regulator Output Current in Shutdown |  |  |  | 18 | µA | -40°C≤TJ≤ +125°C | 4 |
| Maximum Input Voltage | VIN |  |  | 40 | V |  | 3 |
| Enable Input Voltage |  | -0.3 |  |  | V | Upper limit printed as VIN (see review_required) | 3 |
| Storage Temperature Range |  | -55 |  | 150 | °C |  | 3 |
| Operating Junction Temperature | TJ | -40 |  | 125 | °C |  | 3 |
| ESD Susceptibility, HBM |  |  |  | 2000 | V | HBM | 3 |
| Input Supply Voltage | VIN | 4.5 |  | 26 | V |  | 3 |
| Operating Ambient Temperature |  | -40 |  | 85 | °C |  | 3 |
| Package Thermal Resistance, Junction-to-case (TO-263) | RθJC |  | 3 |  | °C/W | TO-263 package, junction-to-case | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | Internally connected directly to the device pin3 (GND). The thermal tab must be connected to a copper area on the PCB at the same | 2 |

## CAD (KiCad official)

- Symbol: `COS29302`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5L (KiCad packages3D, STEP)
- 3D model files: `cos29302-etched.step` / `cos29302-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos29302.step` / `cos29302.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos29302-datasheet.pdf) (7 pp, sha256 `ca28f741d9dc4058`, retrieved 2026-11-05, 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/cos29302-datasheet.pdf)