LM5033MMX

Texas Instruments · DC-DC Converters · VSSOP-10-0.5mm

LM5033MMX from Texas Instruments, in a VSSOP-10-0.5mm. 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	Input to the start-up regulator with an input range of 15 V to 90 V and transient capability to 100 V.
2	REF	output	Sink-only output that requires an external pullup resistor and can serve as a 2.5-V precision output reference for external circuitry.
3	COMP	input	Feedback to the inverting input of the PWM comparator through a 3:1 divider, where duty cycle increases as the voltage rises and an internal 5-kΩ pullup goes to 5.2 V.
4	VCC	power_in	9.6-V output from the internal high-voltage series pass regulator, which can be overdriven by an external 10 V to 15 V to shut down the internal regulator, with an internal diode connecting VCC to VIN.
5	OUT1	output	Alternating output gate driver that can source and sink 1.5 A.
6	OUT2	output	Alternating output gate driver that can source and sink 1.5 A.
7	GND	power_in	Ground connection, where external ground connections must be made with care for optimum performance.
8	CS	input	Current-sense input for current limit detection; if the voltage exceeds 0.5 V the outputs are disabled and the SS pin is discharged to ground.
9	RT/SYNC	input	Oscillator timing resistor pin, where an external resistor to ground sets the frequency, that also accepts AC-coupled synchronization pulses from an external source.
10	SS	input	Soft-start pin with an internal 10-µA current source and external capacitor setting the soft-start timing, which can be pulled below 0.5 V to disable the output drivers.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VSSOP-10-0.5mm
Category	Power Management (PMIC)
Pins	10

CAD (KiCad official)

Symbol: LM5033MMX
Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
3D model: VSSOP-10-0.5mm (KiCad packages3D, STEP)
3D model files: lm5033mmx-etched.step / lm5033mmx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm5033mmx.step / lm5033mmx.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (28 pp, sha256 0c354dacbb795bad, retrieved 2026-10-10, 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

# LM5033MMX

**Texas Instruments** · DC-DC Converters · VSSOP-10-0.5mm

LM5033MMX from Texas Instruments, in a VSSOP-10-0.5mm. 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 | Input to the start-up regulator with an input range of 15 V to 90 V and transient capability to 100 V. |
| 2 | REF | output | Sink-only output that requires an external pullup resistor and can serve as a 2.5-V precision output reference for external circuitry. |
| 3 | COMP | input | Feedback to the inverting input of the PWM comparator through a 3:1 divider, where duty cycle increases as the voltage rises and an internal 5-kΩ pullup goes to 5.2 V. |
| 4 | VCC | power_in | 9.6-V output from the internal high-voltage series pass regulator, which can be overdriven by an external 10 V to 15 V to shut down the internal regulator, with an internal diode connecting VCC to VIN. |
| 5 | OUT1 | output | Alternating output gate driver that can source and sink 1.5 A. |
| 6 | OUT2 | output | Alternating output gate driver that can source and sink 1.5 A. |
| 7 | GND | power_in | Ground connection, where external ground connections must be made with care for optimum performance. |
| 8 | CS | input | Current-sense input for current limit detection; if the voltage exceeds 0.5 V the outputs are disabled and the SS pin is discharged to ground. |
| 9 | RT/SYNC | input | Oscillator timing resistor pin, where an external resistor to ground sets the frequency, that also accepts AC-coupled synchronization pulses from an external source. |
| 10 | SS | input | Soft-start pin with an internal 10-µA current source and external capacitor setting the soft-start timing, which can be pulled below 0.5 V to disable the output drivers. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-10-0.5mm |
| Category | Power Management (PMIC) |
| Pins | 10 |

## CAD (KiCad official)

- Symbol: `LM5033MMX`
- Footprint: `Package_SO:MSOP-10_3x3mm_P0.5mm`
- 3D model: VSSOP-10-0.5mm (KiCad packages3D, STEP)
- 3D model files: `lm5033mmx-etched.step` / `lm5033mmx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5033mmx.step` / `lm5033mmx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm5033) (28 pp, sha256 `0c354dacbb795bad`, retrieved 2026-10-10, 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/lm5033mmx-datasheet.pdf)