# LM5023MM-2

**Texas Instruments** · AC-DC Controllers And Regulators · VSSOP-8-0.65mm

LM5023MM-2 from Texas Instruments, in a VSSOP-8-0.65mm. 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 | QR | input | Quasi-resonant auxiliary FLYBACK winding input that senses the peak auxiliary voltage to detect output overvoltage (OVP) and shut down the controller; pin current is recommended at 1 to 4 mA, with a negative injection current limit of -4 mA. |
| 2 | VSD | output | Connects to the gate of the external start-up FET to disable it after VCC is valid; the pin's absolute maximum voltage is 45 V and its clamp continuous current is limited to 500 µA. |
| 3 | SS | output | An external capacitor and an internal 22 µA current source set the soft-start ramp, with the soft-start pin rated at -0.3 V to 7 V absolute maximum. |
| 4 | COMP | input | Control input for the PWM and skip-cycle comparators, with an internal 42 kΩ pull-up that can bias an opto-coupler transistor; the absolute maximum voltage is 7 V. |
| 5 | CS | input | Current sense input for current-mode control and over-current protection; the cycle-by-cycle limit trips when the input exceeds 0.5 V, and the pin is blanked for 90 ns after OUT goes high, with an absolute maximum of 1.25 V. |
| 6 | GND | power_in | Ground connection return for the internal circuits of the controller. |
| 7 | OUT | output | High-current output that drives the external MOSFET gate, with source and sink capability of 0.3 A and 0.7 A respectively. |
| 8 | VCC | power_in | Bias supply for the controller and gate-drive sections, recommended at 8 V to 14 V with an absolute maximum of 16 V, and requires an external capacitor from this pin to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM5023MM-2`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files: `lm5023mm-2-etched.step` / `lm5023mm-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5023mm-2.step` / `lm5023mm-2.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/lm5023) (33 pp, sha256 `7991abda04f644e3`, retrieved 2026-10-10, 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/lm5023mm-2-datasheet.pdf)