# HE9116A33NR

**HEERMICR** · DC-DC Converters · SOT-23

HE9116A33NR from HEERMICR, in a SOT-23. 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 | VOUT | power_out | Output voltage pin; the VOUT pin voltage is limited to VSS-0.3 V to VSS+8 V (absolute maximum). |
| 2 | GND | power_in | GND pin, the circuit reference (VSS) against which the VOUT, EN and LX absolute maximum ratings are specified. |
| 3 | LX | passive | External inductor connection pin; the LX pin voltage is limited to VSS-0.3 V to VSS+8 V and the LX pin current to 500 mA (absolute maximum). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HEERMICR |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT | 0.98 |  | 1.02 | x VOUT(S) |  | 3 |
| Input Voltage | VIN |  |  | 7.5 | V |  | 3 |
| Operation Start Voltage | VST1 |  |  | 0.9 | V | IOUT=1mA | 3 |
| Input Current At No Load | ISS1 |  | 15 |  | uA | VIN=1.8V, VOUT=3.0V | 3 |
| Current Consumption 2 | ISS2 |  | 6 | 10 | uA | VOUT=VOUT(s)+0.5V | 3 |
| Current Consumption During Shutdown | ISSS |  |  | 1 | uA | VEN=0V | 3 |
| Maximum Oscillation Frequency | fosc |  |  | 300 | KHz | VOUT=0.95xVOUT(s), measure waveform at LX pin | 3 |
| Duty Ratio1 | Duty1 | 70 | 78 | 85 | % | VOUT=0.95xVOUT(s) | 3 |
| Efficiency | EFF1 | 90 |  |  | % |  | 3 |
| Shutdown Pin Input Voltage (high) | VSH | 0.75 |  |  | V | VOUT=0.95xVOUT(s), judge oscillation at LX pin | 3 |
| Shutdown Pin Input Voltage (low) | VSL |  |  | 0.3 | V | VOUT=0.95xVOUT(s), judge stop at LX pin | 3 |
| Shutdown Pin Input Current (high) | ISH | -0.1 |  | 0.1 | uA | VEN=6V | 3 |
| Shutdown Pin Input Current (low) | ISL | -0.1 |  | 0.1 | uA | VEN=0V | 3 |
| VOUT Pin Voltage | VOUT | -0.3 |  | 8 | V | Relative to VSS (printed VSS-0.3~VSS+8) | 3 |
| EN Pin Voltage | EN | -0.3 |  | 8 | V | Relative to VSS (printed VSS-0.3~VSS+8) | 3 |
| LX Pin Voltage | VLX | -0.3 |  | 8 | V | Relative to VSS (printed VSS-0.3~VSS+8) | 3 |
| LX Pin Current | ILX |  |  | 500 | mA |  | 3 |
| Power Dissipation | PD |  |  | 250 | mW | Package SOT23 | 3 |
| Operating Temperature | TOPR | -40 |  | 85 | ℃ |  | 3 |
| Storage Temperature | TSTG | -40 |  | 125 | ℃ |  | 3 |
| Soldering Temperature | TSOLDER |  |  | 260 | ℃ | 10 s | 3 |

## CAD (KiCad official)

- Symbol: `HE9116A33NR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `he9116a33nr-etched.step` / `he9116a33nr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `he9116a33nr.step` / `he9116a33nr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HEERMICR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590238344941629440) (7 pp, sha256 `2e71334f2591137e`, 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/he9116a33nr-datasheet.pdf)