# PT4115ME89E

**PowTech CR PowTech Shanghai** · LED Drivers · SOT-89-5

PT4115ME89E from PowTech CR PowTech Shanghai, in a SOT-89-5. 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 | SW | output | Drain of the internal power switch; absolute maximum rating is -0.3 to 40 V and the switch output current is rated 1.2 A max. |
| 2 | GND | power_in | Signal and power ground for the device. |
| 3 | DIM | input | Switch enable and analog/PWM dimming input; absolute maximum is -0.3 to 6 V, PWM high level is 2.5 V min, PWM low level is 0.2 V max, and the analog dimming range is 0.5 V to 2.5 V. |
| 4 | CSN | input | Current sense input; the sense resistor is connected between CSN and VIN, and the average sense voltage is 100 mV typical (97 to 103 mV) with absolute limits of +0.3 to -6.0 V relative to VIN. |
| 5 | VIN | power_in | Power supply input, rated 6 V to 36 V with an absolute maximum of -0.3 to 40 V; a bypass capacitor must be placed close to this pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PowTech CR PowTech Shanghai |
| Package | SOT-89-5 |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 6 |  | 36 | V |  | 4 |
| DIM analog dimming voltage range | VDIM_DC | 0.5 |  | 2.5 | V |  | 4 |
| DIM input high level | VDIM_PWMH | 2.5 |  |  | V |  | 4 |
| DIM input low level | VDIM_PWML |  |  | 0.2 | V |  | 4 |
| Average sense voltage | VCSN | 97 | 100 | 103 | mV | VIN- VCSN | 4 |
| Sense voltage hysteresis | VCSN_hys | -15 |  | 15 | % |  | 4 |
| Maximum PWM dimming frequency | fDIM |  |  | 20 | kHz |  | 4 |
| Maximum operating frequency | FSW |  |  | 1 | MHz |  | 4 |
| Low-frequency PWM duty cycle range | DPWM_LF | 0.02 |  | 1 | % | fDIM =100Hz | 4 |
| High-frequency PWM duty cycle range | DPWM_HF | 4 |  | 1 | % | fDIM =20KHz | 4 |
| SW leakage current | ILEAK |  | 0.5 | 5 | µA | Vsw=36V，SW 关断 | 4 |
| Undervoltage lockout threshold (falling) | VUVLO |  | 4.2 |  | V | VIN下降 | 4 |
| Undervoltage lockout hysteresis | VUVLO, HYS |  | 300 |  | mV | VIN上升 | 4 |
| Shutdown current | IOFF |  | 95 |  | µA | VDIM<0.3V | 4 |
| CSN pin input current | ICSN |  | 8 |  | µA | VIN-VCSN=50mV | 4 |
| Internal circuit operating voltage | VDIM |  | 4.5 |  | V | DIM浮空 | 4 |
| DIM pull-up resistor | RDIM |  | 200 |  | KΩ |  | 4 |
| DIM pin-to-ground leakage current | IDIM_L |  | 22 |  | µA | VDIM = 0 | 4 |
| SW on-resistance | RSW |  | 0.5 |  | Ω | VIN=6V-36V | 4 |
| SW continuous current | ISWmean |  | 0.8 |  | A |  | 4 |
| Thermal shutdown system compensation temperature | TSC |  | 135 |  | ℃ |  | 4 |
| Input supply voltage | VIN | -0.3 |  | 40 | V |  | 3 |
| SW drain voltage | SW | -0.3 |  | 40 | V |  | 3 |
| CSN current sense pin voltage | CSN | -6 |  | 0.3 | V | relative to VIN | 3 |
| DIM pin voltage | DIM | -0.3 |  | 6 | V |  | 3 |
| Power switch output current | ISW |  |  | 1.2 | A |  | 3 |
| Power dissipation | PDMAX |  |  | 1.5 | W | 注2: PDMAX=(TJMAX-TA)/θJA or lower limit given | 3 |
| Thermal resistance, junction to ambient, SOT89-5 | θJA |  | 130 |  | °C/W | SOT89-5 | 3 |
| Operating junction temperature range | TJ | -40 |  | 150 | °C |  | 3 |
| Storage temperature range | TSTG | -55 |  | 150 | °C |  | 3 |
| ESD rating | ESD |  |  | 2 | kV | Human body model, 100pF discharged through 1.5kΩ | 3 |
| Output current | Iout |  |  | 1 | A |  | 3 |

## CAD (KiCad official)

- Symbol: `PT4115ME89E`
- Footprint: `Package_TO_SOT_SMD:SOT-89-5`
- 3D model: SOT-89-5 (KiCad packages3D, STEP)
- 3D model files: `pt4115me89e-etched.step` / `pt4115me89e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pt4115me89e.step` / `pt4115me89e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PowTech CR PowTech Shanghai datasheet](docs/pt4115me89e-datasheet.pdf) (11 pp, sha256 `e5770a33cad58707`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/pt4115me89e-datasheet.pdf)