# PAM2305AABADJ

**Diodes Incorporated** · DC-DC Converters · TSOT-25

PAM2305AABADJ from Diodes Incorporated, in a TSOT-25. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Chip main power supply pin. Input voltage range 2.5V to 5.5V (abs max 6.0V). Bypass to GND with a 10 uF ceramic capacitor placed as close as possible to this pin. |
| 2 | GND | power_in | Device ground reference for input, output and control signals. All voltages are referenced to this pin. |
| 3 | EN | input | Enable Control Input. Force this pin above VEH = 1.5V (min) to enable the converter; drive below VEL = 0.3V (max) to shut down the device (ISD < 1 uA). Do not leave floating. Abs max -0.3V to VIN. |
| 4 | VOUT/FB | input | Adjustable-output feedback pin. Connect to a resistor divider (R1 top, R2 to GND) from VOUT so the internal error amplifier regulates this node to the 0.6V (typ) reference: VOUT = 0.6V * (1 + R1/R2). On fixed-output part numbers this pin ties directly to VOUT through an internal divider; on the ADJ variant only the FB function is used. |
| 5 | SW | power_out | Switching node. Common drain of the internal P-channel main MOSFET (RDS(on) ~0.3 ohm) and N-channel synchronous rectifier (RDS(on) ~0.35 ohm). Connect to the external 4.7 uH inductor to VOUT. Peak inductor current is limited to ~1.5A. Abs max -0.3V to (VIN+0.3V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TSOT-25 |
| Category | PMIC |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `PAM2305AABADJ`
- `PAM2305AABADJAAB330`
- `PAM2305AABADJAAB280`
- `PAM2305AABADJAAB250`
- `PAM2305AABADJAAB180`
- `PAM2305AABADJAAB150`
- `PAM2305AABADJAAB120`
- `PAM2305AABADJCGFADJ`
- `PAM2305AABADJCGF330`
- `PAM2305AABADJCGF280`
- `PAM2305AABADJCGF250`
- `PAM2305AABADJCGF180`
- `PAM2305AABADJCGF150`
- `PAM2305AABADJCGF120`
- `PAM2305AABADJBJEADJ`
- `PAM2305AABADJBJE330`
- `PAM2305AABADJBJE280`
- `PAM2305AABADJBJE250`
- `PAM2305AABADJBJE180`
- `PAM2305AABADJBJE150`
- `PAM2305AABADJBJE120`

## 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 | V |  | 3 |
| EN, FB Pin Voltage (printed max is VIN) |  | -0.3 |  |  | V |  | 3 |
| SW Pin Voltage (printed max is VIN +0.3) |  | -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), TSOT25 (Note 1) | θJC |  |  | 130 | °C/W |  | 3 |
| Thermal Resistance (Junction to Ambient), TSOT25 | θJA |  |  | 250 | °C/W |  | 3 |
| Internal Power Dissipation, TSOT25 | PD |  |  | 400 | mW |  | 3 |
| Input Voltage Range | VIN | 2.5 |  | 5.5 | V |  | 4 |
| Regulated Feedback Voltage | VFB | 0.588 | 0.6 | 0.612 | V |  | 4 |
| Regulated Output Voltage Accuracy | VO | -3 |  | 3 | % | IO = 100mA | 4 |
| Reference Voltage Line Regulation | ΔVFB |  |  | 0.3 | %/V |  | 4 |
| Output Voltage Line Regulation | LNR |  | 0.2 | 0.5 | %/V | VIN = 2.5V to 5V, IO = 10mA | 4 |
| Output Voltage Load Regulation | LDR |  | 0.5 | 1.5 | % | IO = 1mA to 800mA | 4 |
| Quiescent Current | IQ |  | 40 | 70 | µA | No load | 4 |
| Shutdown Current | ISD |  | 0.1 | 1 | µA | VEN = 0V | 4 |
| Oscillator Frequency | fOSC | 1.2 | 1.5 | 1.8 | MHz | VO = 100% | 4 |
| Drain-Source On-State Resistance, P MOSFET | RDS(ON) |  | 0.3 | 0.45 | Ω | IDS = 100mA | 4 |
| Drain-Source On-State Resistance, N MOSFET | RDS(ON) |  | 0.35 | 0.5 | Ω | IDS = 100mA | 4 |
| SW Leakage Current | ILSW |  | 0.01 | 1 | µA |  | 4 |
| Peak Inductor Current | IPK |  | 1.5 |  | A | VIN = 3V, VFB = 0.5V or VO = 90% | 4 |
| Oscillator Frequency (VFB = 0V or VO = 0V) | fOSC |  | 500 |  | kHz | VFB = 0V or VO = 0V | 4 |
| High Efficiency | η |  | 96 |  | % |  | 4 |
| EN Threshold High | VEH |  | 1.5 |  | V |  | 4 |
| EN Threshold Low | VEL |  | 0.3 |  | V |  | 4 |
| EN Leakage Current | IEN |  | 0.01 |  | µA |  | 4 |
| Over Temperature Protection | OTP |  | 150 |  | °C |  | 4 |
| OTP Hysteresis | OTH |  | 30 |  | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `PAM2305AABADJ`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: TSOT-25 (KiCad packages3D, STEP)
- 3D model files: `pam2305aabadj-etched.step` / `pam2305aabadj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pam2305aabadj.step` / `pam2305aabadj.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`pam2305aabadj.step`](pam2305aabadj.step) | 85 KB | You want the bare part, or you mark your own boards. |
| [`pam2305aabadj-etched.step`](pam2305aabadj-etched.step) | 2.3 MB | You want the part with `PAM2305AABADJ` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 574 faces against 102 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/PAM2305AABADJ.pdf) (17 pp, sha256 `4916f455ea4c71db`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/pam2305aabadj-datasheet.pdf)