# PAM2321AYMADJ

**Diodes Incorporated** · DC-DC Converters · TDFN-10(3x3)

PAM2321AYMADJ from Diodes Incorporated, in a TDFN-10(3x3). 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; a logic low disables the converter (shutdown current below 1µA) and a high level resumes normal operation, with thresholds of 1.4V high and 0.4V low. |
| 2 | PVIN | power_in | Input power supply tied to the source of the high side P-Channel MOSFET, operating range 2.7V to 5.5V. |
| 3 | VIN | power_in | Power supply for the internal circuitry; a small decoupling capacitor should be placed between VIN and AGND. |
| 4 | AGND | power_in | Analog ground, internally connected to the analog ground of the control circuitry. |
| 5 | FB | input | Feedback input connected to an external resistor divider for the adjustable output version, with a regulated feedback voltage of 0.600V typical. |
| 6 | AGND | power_in | Analog ground, internally connected to the analog ground of the control circuitry. |
| 7 | SW | passive | Switching node to which the inductor is connected, internally tied to the drain of both high and low side MOSFETs. |
| 8 | SW | passive | Switching node to which the inductor is connected, internally tied to the drain of both high and low side MOSFETs. |
| 9 | PGND | power_in | Main power ground return pin, connected to the output and input capacitor return. |
| 10 | PGND | power_in | Main power ground return pin, connected to the output and input capacitor return. |
| 11 | EP | power_in | Exposed pad providing electrical ground contact and thermal contact to the PCB; it must be soldered to the PCB for proper operation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TDFN-10(3x3) |
| Category | Power Management (PMIC) |
| Pins | 11 |

## 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 |  | -0.3 |  | 6.5 | V |  | 3 |
| EN, FB Pin Voltage |  | -0.3 |  |  | V |  | 3 |
| SW Pin Voltage |  | -0.3 |  |  | V |  | 3 |
| Junction Temperature |  |  |  | 150 | °C |  | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Soldering Temperature |  |  |  | 300 | °C | 5 sec | 3 |
| Supply Voltage |  | 2.5 |  | 5.5 | V |  | 3 |
| Operation Temperature Range |  | -40 |  | 85 | °C |  | 3 |
| Junction Temperature Range |  | -40 |  | 125 | °C |  | 3 |
| Thermal Resistance (Junction to Case) | θJC |  |  | 8.5 | °C/W | TDFN3x3-10 package | 3 |
| Thermal Resistance (Junction to Ambient) | θJA |  |  | 60 | °C/W | TDFN3x3-10 package | 3 |
| Internal Power Dissipation | PD |  |  | 1.66 | W | TDFN3x3-10 package | 3 |
| Input Voltage Range | VIN | 2.7 | 3.3 | 5.5 | V |  | 4 |
| UVLO Threshold | VUVLO | 2.6 |  | 2.7 | V | VIN Rising | 4 |
| Output Voltage Range | VOUT | 1 | 1.2 |  | V |  | 4 |
| Output Voltage Accuracy | VOUT | -3 |  | 3 | % | IO = 0mA | 4 |
| Regulated Feedback Voltage | VFB | 0.588 | 0.6 | 0.612 | V | No Load | 4 |
| Output Voltage Line Regulation | LNR |  |  | 0.3 | %/V | VIN = 3.3V to 4V | 4 |
| Output Voltage Load Regulation | LDR |  |  | 1 | %/A | IO = 1mA to 2A | 4 |
| Quiescent Current | IQ |  | 55 | 90 | µA | No Load | 4 |
| Shutdown Current | ISD |  |  | 1 | µA | VEN = 0V | 4 |
| Drain-Source On-State Resistance, P MOSFET | RDS(ON) |  |  | 130 | mΩ | IDS = 100mA | 4 |
| Drain-Source On-State Resistance, N MOSFET | RDS(ON) |  |  | 90 | mΩ | IDS = 100mA | 4 |
| SW Leakage Current | ILSW |  |  | 1 | µA |  | 4 |
| EN Threshold High | VEH | 1.4 |  |  | V |  | 4 |
| EN Threshold Low | VEL |  |  | 0.4 | V |  | 4 |
| EN Leakage Current | IEN | -0.01 |  | 0.01 | µA |  | 4 |
| UVLO Threshold | VUVLO |  | 2 |  | V | VIN Falling | 4 |
| UVLO Hysteresis |  |  | 250 |  | mV |  | 4 |
| PMOS Current Limit | ILIM |  | 3 |  | A |  | 4 |
| Oscillator Frequency | fOSC |  | 3 |  | MHz |  | 4 |
| Start-Up Time | tS |  | 200 |  | µs | VIN = 3.3V, VO = 1.2V | 4 |
| PSM Threshold | ITH |  | 200 |  | mA |  | 4 |
| Over Temperature Protection | OTP |  | 150 |  | °C |  | 4 |
| OTP Hysteresis | OTH |  | 30 |  | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `PAM2321AYMADJ`
- Footprint: `Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm`
- 3D model: TDFN-10(3x3) (KiCad packages3D, STEP)
- 3D model files: `pam2321aymadj-etched.step` / `pam2321aymadj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pam2321aymadj.step` / `pam2321aymadj.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/8590223665146064896) (11 pp, sha256 `d1be6786017ff183`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/pam2321aymadj-datasheet.pdf)