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LM2591HVS-12
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UMW DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM2591HVS-12
UMW · DC-DC Converters · TO-263-5
LM2591HVS-12 from UMW, in a TO-263-5. 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 | VIN | power_in | Positive input supply for the switching regulator, rated up to 60V in the features list (absolute maximum supply 63V), and needs a suitable low-ESR input bypass capacitor placed close to this pin. |
| 2 | Output | output | Internal switch output that swings between (VIN − VSAT) and about −0.5V at a duty cycle of approximately VOUT/VIN, with output-to-ground steady-state limit of −1V, so its PC board copper area should be kept to a minimum. |
| 3 | GND | power_in | Circuit ground for the regulator. |
| 4 | Feedback | input | Senses the regulated output voltage to complete the feedback loop. |
| 5 | ON/OFF | input | Logic-level shutdown pin: pulling it below about 1.3V turns the regulator on, pulling it above 1.3V (maximum 25V) shuts it down, and leaving it floating or tied to ground keeps the regulator on. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | TO-263-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |
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 (12V version) | VOUT | 11.4 | 12 | 12.6 | V | 15V≤VIN≤60V, 0.2A≤ILOAD≤1A; min/max are full operating temperature range (room temp: 11.52 / 12.48) | 5 |
| Oscillator frequency | fO | 110 | 150 | 173 | kHz | VIN=24V for 12V version, ILOAD=500mA; min/max are full operating temperature range (room temp min 127) | 6 |
| Saturation voltage | VSAT | 1.16 | 1.5 | V | IOUT=1A (Notes 7, 8); max is full operating temperature range (room temp max 1.4) | 6 | |
| Standby quiescent current | ISTBY | 80 | 250 | µA | ON/OFF pin=5V (OFF); max is full operating temperature range (room temp max 200) | 6 | |
| Supply voltage (recommended operating) | 4.5 | 60 | V | 4 | |||
| Operating temperature range | -40 | 125 | °C | Ordering table: -40°C≤TA≤125°C | 4 | ||
| Maximum supply voltage | 63 | V | 4 | ||||
| ON/OFF pin input voltage | 25 | V | 4 | ||||
| Output voltage to ground (steady state) | -1 | V | Steady state | 4 | |||
| Storage temperature range | -65 | 150 | °C | 4 | |||
| ESD susceptibility, human body model | 2 | kV | Human body model (100 pF, 1.5 kΩ) | 4 | |||
| Maximum junction temperature | 150 | °C | 4 | ||||
| Vapor phase soldering | 215 | °C | 60 sec. | 4 | |||
| Infrared soldering | 245 | °C | 10 sec. | 4 | |||
| T package soldering | 260 | °C | 10 sec. | 4 | |||
| Junction to case thermal resistance | θJC | 2 | °C/W | TO-220 or TO-263 package, junction to case | 7 | ||
| Junction to ambient thermal resistance (TO-220) | θJA | 50 | °C/W | TO-220 package, junction to ambient (Note 11); not this package | 7 | ||
| Junction to ambient thermal resistance (TO-263, 0.5 in² copper) | θJA | 50 | °C/W | TO-263 package, junction to ambient, 0.5 in² 1 oz copper (Note 12) | 7 | ||
| Junction to ambient thermal resistance (TO-263, 2.5 in² copper) | θJA | 30 | °C/W | TO-263 package, junction to ambient, single-sided PCB 2.5 in² 1 oz copper (Note 13) | 7 | ||
| Junction to ambient thermal resistance (TO-263, 3 in² copper) | θJA | 20 | °C/W | TO-263 package, junction to ambient, double-sided PCB 3 in² 1 oz copper (Note 14) | 7 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | leads soldered to a printed circuit board with (1 oz.) copper area of approximately 1 in2 | 8 |
CAD (KiCad official)
- Symbol:
LM2591HVS-12 - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm2591hvs-12-etched.step/lm2591hvs-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2591hvs-12.step/lm2591hvs-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (22 pp, sha256
3830e8a059139e73, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# LM2591HVS-12
**UMW** · DC-DC Converters · TO-263-5
LM2591HVS-12 from UMW, in a TO-263-5. 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 | VIN | power_in | Positive input supply for the switching regulator, rated up to 60V in the features list (absolute maximum supply 63V), and needs a suitable low-ESR input bypass capacitor placed close to this pin. |
| 2 | Output | output | Internal switch output that swings between (VIN − VSAT) and about −0.5V at a duty cycle of approximately VOUT/VIN, with output-to-ground steady-state limit of −1V, so its PC board copper area should be kept to a minimum. |
| 3 | GND | power_in | Circuit ground for the regulator. |
| 4 | Feedback | input | Senses the regulated output voltage to complete the feedback loop. |
| 5 | ON/OFF | input | Logic-level shutdown pin: pulling it below about 1.3V turns the regulator on, pulling it above 1.3V (maximum 25V) shuts it down, and leaving it floating or tied to ground keeps the regulator on. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | TO-263-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |
## 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 (12V version) | VOUT | 11.4 | 12 | 12.6 | V | 15V≤VIN≤60V, 0.2A≤ILOAD≤1A; min/max are full operating temperature range (room temp: 11.52 / 12.48) | 5 |
| Oscillator frequency | fO | 110 | 150 | 173 | kHz | VIN=24V for 12V version, ILOAD=500mA; min/max are full operating temperature range (room temp min 127) | 6 |
| Saturation voltage | VSAT | | 1.16 | 1.5 | V | IOUT=1A (Notes 7, 8); max is full operating temperature range (room temp max 1.4) | 6 |
| Standby quiescent current | ISTBY | | 80 | 250 | µA | ON/OFF pin=5V (OFF); max is full operating temperature range (room temp max 200) | 6 |
| Supply voltage (recommended operating) | | 4.5 | | 60 | V | | 4 |
| Operating temperature range | | -40 | | 125 | °C | Ordering table: -40°C≤TA≤125°C | 4 |
| Maximum supply voltage | | | | 63 | V | | 4 |
| ON/OFF pin input voltage | | | | 25 | V | | 4 |
| Output voltage to ground (steady state) | | -1 | | | V | Steady state | 4 |
| Storage temperature range | | -65 | | 150 | °C | | 4 |
| ESD susceptibility, human body model | | | | 2 | kV | Human body model (100 pF, 1.5 kΩ) | 4 |
| Maximum junction temperature | | | | 150 | °C | | 4 |
| Vapor phase soldering | | | | 215 | °C | 60 sec. | 4 |
| Infrared soldering | | | | 245 | °C | 10 sec. | 4 |
| T package soldering | | | | 260 | °C | 10 sec. | 4 |
| Junction to case thermal resistance | θJC | | 2 | | °C/W | TO-220 or TO-263 package, junction to case | 7 |
| Junction to ambient thermal resistance (TO-220) | θJA | | 50 | | °C/W | TO-220 package, junction to ambient (Note 11); not this package | 7 |
| Junction to ambient thermal resistance (TO-263, 0.5 in² copper) | θJA | | 50 | | °C/W | TO-263 package, junction to ambient, 0.5 in² 1 oz copper (Note 12) | 7 |
| Junction to ambient thermal resistance (TO-263, 2.5 in² copper) | θJA | | 30 | | °C/W | TO-263 package, junction to ambient, single-sided PCB 2.5 in² 1 oz copper (Note 13) | 7 |
| Junction to ambient thermal resistance (TO-263, 3 in² copper) | θJA | | 20 | | °C/W | TO-263 package, junction to ambient, double-sided PCB 3 in² 1 oz copper (Note 14) | 7 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | | leads soldered to a printed circuit board with (1 oz.) copper area of approximately 1 in2 | 8 |
## CAD (KiCad official)
- Symbol: `LM2591HVS-12`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `lm2591hvs-12-etched.step` / `lm2591hvs-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2591hvs-12.step` / `lm2591hvs-12.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757271301818068992) (22 pp, sha256 `3830e8a059139e73`, retrieved 2026-10-18, 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/lm2591hvs-12-datasheet.pdf)