# LM2594D-5.0RG

**HANSCHIP semiconductor** · DC-DC Converters · SOP-8

LM2594D-5.0RG from HANSCHIP semiconductor, in a SOP-8. 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 | NC | unconnected | No internal function; the datasheet lists this pin as a non-functional (no-connect) pin. |
| 2 | NC | unconnected | No internal function; the datasheet lists this pin as a non-functional (no-connect) pin. |
| 3 | NC | unconnected | No internal function; the datasheet lists this pin as a non-functional (no-connect) pin. |
| 4 | FEEDBACK | input | Voltage feedback pin that monitors the output through an external resistor divider and regulates it, with a feedback threshold voltage of 1.23V. |
| 5 | ON_OFF | input | Enable pin: a low level (at or below 0.8V) turns the regulator on and a high level (at or above 1.4V) shuts it off, and the pin defaults to low when floating. |
| 6 | GND | power_in | Ground pin that should be routed on the PCB to the ground return path away from the Schottky diode to keep switching current spikes from coupling noise into the regulation. |
| 7 | VIN | power_in | Supply input that requires a DC source of 4.5V to 40V (60V for the HV version), with a large bulk capacitor placed between this pin and ground to suppress supply noise. |
| 8 | OUTPUT | output | Power switch output that is the switching node driving the output load through the inductor; it is a switch node, not a fixed-voltage rail. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HANSCHIP semiconductor |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage (LM2594-5.0, 5 V fixed version) | VOUT | 4.8 | 5 | 5.2 | V | VIN=7V～40V, ILOAD=0.2A～1A | 3 |
| Input operating voltage (LM2594) | VIN | 4.5 |  | 40 | V |  | 4 |
| Standby current | ISTBY |  | 80 | 200 | uA | VON_OFF=5V | 4 |
| Quiescent operating current | IQ |  | 2 | 10 | mA | VON_OFF=0V, VFB=VIN | 4 |
| Operating frequency | FOSC | 127 | 150 | 173 | kHz |  | 4 |
| Current limit | IL | 3.6 | 4.8 | 6.9 | A | VFB=0 | 4 |
| ON_OFF pin threshold voltage (1.4 V value, high/控制关 level) | VON_OFF | 1.4 |  |  | V |  | 4 |
| ON_OFF pin threshold voltage (0.8 V value, low/控制开 level) | VON_OFF |  |  | 0.8 | V |  | 4 |
| ON_OFF pin leakage current (IH) | IH |  | 5 | 15 | µA | VON_OFF=2.5V(ON) | 4 |
| ON_OFF pin leakage current (IL) | IL |  | 0.2 | 5 | µA | VON_OFF=2.5V(ON) | 4 |
| Saturation voltage | VCE |  | 1.3 | 1.5 | V | VFB=0V, LOUT=1A | 4 |
| Maximum duty cycle | DMAX |  |  | 100 | % | CFB=0V | 4 |
| Thermal resistance junction-to-ambient | RJA |  | 150 |  | ℃/W |  | 4 |
| Input supply voltage (LM2594) | VIN |  |  | 40 | V |  | 2 |
| Feedback pin voltage | VFB | -0.3 |  |  | V |  | 2 |
| ON_OFF pin voltage | VON_OFF | -0.3 |  |  | V |  | 2 |
| Power transistor output (OUTPUT pin) voltage | VOUT PUT | -0.3 |  |  | V |  | 2 |
| Operating junction temperature | TJ | -40 |  | 125 | ℃ |  | 2 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 2 |
| Lead soldering temperature, 10 s | TLEAD |  |  | 245 | ℃ | 10 S | 2 |
| ESD capability, human body model | ESD |  |  | 2000 | V | Human body model | 2 |
| Input voltage (LM2594) recommended | VIN | 5 |  | 40 | V |  | 2 |
| Operating junction temperature range (recommended) | TJ | -40 |  | 125 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `LM2594D-5.0RG`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm2594d-5-0rg-etched.step` / `lm2594d-5-0rg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2594d-5-0rg.step` / `lm2594d-5-0rg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HANSCHIP semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590456072658837504) (12 pp, sha256 `f3bc80a5fbf5d28b`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/lm2594d-5-0rg-datasheet.pdf)