# AP1513SG-13

**Diodes Incorporated** · DC-DC Converters · SOIC-8

AP1513SG-13 from Diodes Incorporated, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | FB | input | Feedback pin for the error amplifier, with VFB specified at 0.784 V to 0.816 V (0.8 V typical) and the output set by VOUT = VFB x (1 + RA/RB). |
| 2 | EN | input | Power-off pin: driving it high (VSH minimum 2.0 V) gives normal step-down operation, and driving it low (VSL maximum 0.8 V) stops step-down operation with all circuits deactivated. |
| 3 | OCSET | input | Connect an external resistor from VCC to this pin to set the maximum output current, using the internal OCSET bias current of 75 µA to 105 µA (90 µA typical). |
| 4 | VCC | power_in | IC power supply pin, with a recommended input voltage range of 3.6 V to 18 V and an absolute maximum VCC pin voltage of VSS - 0.3 V to VSS + 20 V. |
| 5 | Output | output | Switch output pin that connects the external inductor and diode; minimize the trace area at this pin to reduce EMI, and note it is internally connected to the die pad together with pin 6. |
| 6 | Output | output | Switch output pin that connects the external inductor and diode; minimize the trace area at this pin to reduce EMI, and note it is internally connected to the die pad together with pin 5. |
| 7 | VSS | power_in | Ground pin, internally connected to the die pad together with pin 8 on the SO-8 package. |
| 8 | VSS | power_in | Ground pin, internally connected to the die pad together with pin 7 on the SO-8 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOIC-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 |
|---|---|---|---|---|---|---|---|
| VCC Pin Voltage | VCC | -0.3 |  | 20 | V | Referenced to VSS (printed VSS - 0.3 to VSS + 20) | 2 |
| FB Pin Voltage | VFB | -0.3 |  |  | V | Referenced to VSS (printed VSS - 0.3 to VCC; upper limit is VCC, not numeric) | 2 |
| EN Pin Voltage | VEN | -0.3 |  |  | V | Referenced to VSS (printed VSS - 0.3 to VIN + 0.3; upper limit not numeric) | 2 |
| Output Pin Voltage | VOUT | -0.3 |  |  | V | Referenced to VSS (printed VSS - 0.3 to VIN + 0.3; upper limit not numeric) | 2 |
| Operating Junction Temperature Range | TJ | -40 |  | 125 | °C |  | 2 |
| Storage Temperature Range | TST | -40 |  | 150 | °C |  | 2 |
| Input Voltage | VIN | 3.6 |  | 18 | V |  | 3 |
| Output Current | IOUT | 0 |  | 2 | A |  | 3 |
| Operating Ambient Temperature | TA | -20 |  | 85 | °C |  | 3 |
| Feedback Voltage | VFB | 0.784 | 0.8 | 0.816 | V | IOUT = 0.1A | 3 |
| Feedback Bias Current | IFB |  | 0.1 | 0.5 | µA | IOUT = 0.1A | 3 |
| Switch Current | ISW | 2.5 |  |  | A |  | 3 |
| Line Regulation | ∆VOUT/VOUT |  | 1 | 2 | % | VIN = 5V to 18V | 3 |
| Load Regulation | ∆VOUT/VOUT |  | 0.2 | 0.5 | % | IOUT = 0.1 to 2A | 3 |
| Oscillation Frequency | fOSC | 240 | 300 | 400 | kHz | Measure waveform at Output pin | 3 |
| Frequency of Current Limit or Short Circuit Protect | fOSC1 | 10 |  |  | kHz | Measure waveform at Output pin | 3 |
| EN Pin Input Voltage (high) | VSH | 2 |  |  | V | Evaluate oscillation at Output pin | 3 |
| EN Pin Input Voltage (low) | VSL |  |  | 0.8 | V | Evaluate oscillation stop at Output pin | 3 |
| OCSET Pin Bias Current | IOCSET | 75 | 90 | 105 | µA |  | 3 |
| Soft-Start Time | tSS | 0.3 | 2 | 5 | ms |  | 3 |
| Internal MOSFET RDSON | RDSON |  | 110 | 150 | mΩ | VIN = 5V, VFB = 0V | 3 |
| Internal MOSFET RDSON | RDSON |  | 70 | 100 | mΩ | VIN = 12V, VFB = 0V | 3 |
| Thermal Resistance Junction-to-Ambient | θJA |  | 134 |  | °C/W | SO-8 (Note 4) | 3 |
| Thermal Resistance Junction-to-Case | θJC |  | 22 |  | °C/W | SO-8 (Note 4) | 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 |  | If you need low TC & TJ or large PD (Power Dissipation), the dual Output pins (5 & 6) and VSS pins (7 & 8) on the SO-8 package are internally connected to die pad, The evaluation board should be allow | 7 |

## CAD (land: KiCad; 3D: generated from the datasheet)

- Symbol: `AP1513SG-13`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8, generated on the KiCad land (body 3.85 x 4.9 mm, terminals on the pads, 1.45 mm tall, datasheet A, nominal). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files: `ap1513sg-13-etched.step` / `ap1513sg-13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap1513sg-13.step` / `ap1513sg-13.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AP1513SG-13.pdf) (9 pp, sha256 `687425bc8d5f17e6`, retrieved 2026-11-13, 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:** land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

[Datasheet PDF](docs/ap1513sg-13-datasheet.pdf)