# SSP7903P36JR

**Shanghai Siproin Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

SSP7903P36JR from Shanghai Siproin Microelectronics, in a TO-252. 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 | VIN | power_in | Input supply pin; the datasheet specifies an input voltage range of 2.2 V to 40 V, with an absolute maximum of 40 V. |
| 2 | GND | power_in | Ground reference pin; the datasheet gives no separate electrical limit for this pin. |
| 3 | VOUT | power_out | Regulated output pin, rated for a maximum output current of 1 A with output voltage accuracy of ±2% of VOUT(S). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Siproin Microelectronics |
| Package | TO-252 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage (absolute maximum) | VIN | -0.3 |  | 40 | V |  | 5 |
| Operating Ambient Temperature | Topr | -40 |  | 85 | ℃ |  | 5 |
| Storage Temperature | Tstg | -40 |  | 125 | ℃ |  | 5 |
| Power Dissipation (TO252 package) | PD |  |  | 1800 | mW | TO 252 package; note (1): increasing welding area increases power dissipation | 5 |
| Output Voltage Accuracy (tolerance) | VOUT(S) | -2 |  | 2 | % | Output voltage accuracy, tolerance ±2% (features list) | 1 |
| Output Voltage | VOUT(S) | 0.98 |  | 1.02 | x VOUT(S) | VIN= VOUT(S)+2V, IOUT=10mA; printed as VOUT(S) x0.98 to VOUT(S) x1.02 | 5 |
| Dropout Voltage (IOUT=1mA) | VDROP |  | 4 | 8 | mV | IOUT=1mA | 5 |
| Dropout Voltage (IOUT=1A) | VDROP |  | 1000 | 1500 | mV | IOUT=1A | 5 |
| Line Regulation |  |  | 0.01 | 0.02 | %/V | VOUT(S)+2V≤VIN≤40V, IOUT=1mA | 5 |
| Load Regulation (VOUT(S)≤10V) | ∆VOUT2 |  | 20 | 80 | mV | VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤10V | 5 |
| Temperature Stability |  | -50 |  | 50 | ppm/℃ | VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Quiescent Current (3.0≤VOUT(S)≤40V) | Iq | 1 | 1.6 | 3 | μA | no load, VIN>VOUT(S), 3.0≤VOUT(S)≤40V | 5 |
| Input Voltage | VIN | 2.2 |  | 40 | V |  | 5 |
| Maximum Output Current | IOUTMAX |  |  | 1 | A |  | 5 |
| Current Limit | ILIM |  | 1.8 |  | A | VIN= VOUT(S)+2V, VOUT = 0.9 ×VOUT(S) | 5 |
| Short Circuit Current | ISHORT |  | 120 |  | mA | VIN=VOUT(S)+2V, VOUT and GND is 0Ω | 5 |
| Power Supply Rejection Ratio (f=10Hz) | PSRR |  | 73.2 |  | dB | f=10Hz, VOUT(S)=3.6V | 5 |
| Power Supply Rejection Ratio (f=100Hz) | PSRR |  | 72.2 |  | dB | f=100Hz, VOUT(S)=3.6V | 5 |
| Power Supply Rejection Ratio (f=1kHz) | PSRR |  | 54.5 |  | dB | f=1kHz, VOUT(S)=3.6V | 5 |
| Over Temperature Protection | OTP |  | 145 |  | ℃ | IOUT=10mA | 5 |

## CAD (KiCad official)

- Symbol: `SSP7903P36JR`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `ssp7903p36jr-etched.step` / `ssp7903p36jr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ssp7903p36jr.step` / `ssp7903p36jr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Siproin Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756932405565636608) (11 pp, sha256 `d1763cb71baebbea`, 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/ssp7903p36jr-datasheet.pdf)