# PAM8019KGR

**Diodes Incorporated** · Global Sourcing Parts · QFN-20-EP(4x4)

PAM8019KGR from Diodes Incorporated, in a QFN-20-EP(4x4). 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 | ROUTN | output | Right-channel class-D power amplifier output, which the datasheet describes as the positive output (label and description conflict with pin 19; see review). |
| 2 | HPROUT | output | Headphone right-channel output of the Class AB headphone amplifier, used when HP/SPK is high. |
| 3 | SD | input | Full-chip shutdown control input, active low, with an internal pullup so it may be left floating; VIH min 1.4 V and VIL max 0.6 V. |
| 4 | Bypass | passive | Bias voltage for the power amplifier; a ceramic bypass capacitor of 0.47 µF to 1.0 µF is recommended, and its value sets the startup rate. |
| 5 | RIN | input | Negative (inverting) input of the right-channel power amplifier. |
| 6 | GND | power_in | Ground connection. |
| 7 | LIN | input | Negative (inverting) input of the left-channel power amplifier. |
| 8 | Volume | input | Internal gain setting input; connect to VDD to set the maximum gain to +20 dB. |
| 9 | Mute | input | Mute control input, active high: logic high disables the class-D outputs and logic low enables them; VIH min 1.4 V, VIL max 0.6 V, with internal pulldown so it may be left floating. |
| 10 | HP/SPK | input | Output mode control input: high selects headphone mode and low selects speaker mode; high threshold 0.8 x VDD to VDD, low threshold 0 to 1.0 V. |
| 11 | PL | passive | Power limit reference voltage for the non-clip power limit (NCPL) function, set through the resistor network described in the application information; NCPL is disabled when PL is floating. |
| 12 | UVP | input | Undervoltage protection input with a 1.2 V shutdown threshold, set externally by a resistor divider that also sets hysteresis. |
| 13 | VDD | power_in | Supply voltage, 2.8 V to 5.5 V. |
| 14 | HPLOUT | output | Headphone left-channel output of the Class AB headphone amplifier, used when HP/SPK is high. |
| 15 | LOUTN | output | Left-channel class-D power amplifier negative output. |
| 16 | VDD | power_in | Supply voltage, 2.8 V to 5.5 V. |
| 17 | LOUTP | output | Left-channel class-D power amplifier positive output. |
| 18 | GND | power_in | Ground connection. |
| 19 | ROUTP | output | Right-channel class-D power amplifier output, which the datasheet describes as the negative output (label and description conflict with pin 1; see review). |
| 20 | VDD | power_in | Supply voltage, 2.8 V to 5.5 V. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | QFN-20-EP(4x4) |
| Category | Global Sourcing Parts |
| Pins | 21 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | -0.3 |  | 6 | V |  | 4 |
| Input Voltage (LIN, RIN, SD, Mute, HP/SPK) | VIN | -0.3 |  |  | V |  | 4 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 4 |
| Maximum Soldering Temperature Range | TSDR |  |  | 300 | °C | 5 seconds | 4 |
| Supply Voltage Range | VDD | 2.8 |  | 5.5 | V |  | 4 |
| High-Level Threshold Voltage, SD, Mute | VIH | 2 |  |  | V |  | 4 |
| Low-Level Threshold Voltage, SD, Mute | VIL | 0 |  | 0.8 | V |  | 4 |
| Low-Level Threshold Voltage, HP/SPK | VIL | 0 |  | 1 | V |  | 4 |
| Common Mode Input Voltage | VICM | 1 |  |  | V |  | 4 |
| Ambient Operation Temperature Range | TA | -40 |  | 85 | °C |  | 4 |
| Junction Temperature Range | TJ | -40 |  | 125 | °C |  | 4 |
| Supply Voltage Range | VDD | 2.8 |  | 5.5 | V |  | 5 |
| Oscillator Frequency | fOSC | 200 | 250 | 300 | kHz |  | 5 |
| Input Resistance (BTL) | RI |  |  | 33 | kΩ | Gain = 20dB | 5 |
| Input Resistance (SE) | RI |  |  | 56 | kΩ | Gain = 3.5dB | 5 |
| Output Power | PO | 1.5 | 1.7 |  | W | THD+N = 10%, f = 1kHz, Rl = 8Ω | 5 |
| Output Power | PO | 2.8 | 3 |  | W | THD+N = 10%, f = 1kHz, Rl = 4Ω | 5 |
| Efficiency | η | 85 | 90 |  | % | PO = 1.7W, f = 1kHz, Rl = 8Ω | 5 |
| Efficiency | η | 80 | 88 |  | % | PO = 3W, f = 1kHz, Rl = 4Ω | 5 |
| Shutdown Current | ISD |  |  | 1 | µA | VMUTE = 0, VSD = 0V, No Load | 5 |
| SD Input High | VIH | 1.4 |  |  | V |  | 5 |
| SD Input Low | VIL |  |  | 0.6 | V |  | 5 |
| Mute Input High | VMH | 1.4 |  |  | V |  | 5 |
| Mute Input Low | VML |  |  | 0.6 | V |  | 5 |
| Thermal Resistance, Junction to Ambient U-QFN4040-20 | θJA |  | 45 |  | °C/W |  | 4 |
| Ambient Operation Temperature Range U-QFN4040-20 | θJC |  | 7 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `PAM8019KGR`
- Footprint: `Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm`
- 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `pam8019kgr-etched.step` / `pam8019kgr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pam8019kgr.step` / `pam8019kgr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913960350965760) (12 pp, sha256 `2b5649780e25538b`, retrieved 2026-10-17, 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/pam8019kgr-datasheet.pdf)