component
MP2481DH-LF-Z
Public Made by Adomby adom
Monolithic Power Systems LED Drivers, MSOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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MP2481DH-LF-Z
Monolithic Power Systems · LED Drivers · MSOP-8-EP
MP2481DH-LF-Z from Monolithic Power Systems, in a MSOP-8-EP. 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 | VDD | power_in | Supply voltage input that operates from +4.5V to +36V unregulated with respect to VSS, and C1 is needed to prevent large voltage spikes from appearing at the input. |
| 2 | VSS | power_in | Power return and voltage reference for the regulated output, which should be connected to the lowest potential in the circuit and is also connected to the exposed pad. |
| 3 | OVP | input | Over-voltage protection input programmed by an external resistor divider, where the frequency folds back below 0.4V, normal operation is set between 0.4V and 1.23V, and the switch turns off when the pin reaches the 1.23V shutdown threshold. |
| 4 | FB | input | LED current feedback input that regulates the voltage across the current-sense resistor between FB and VSS to 0.2V, connected to the bottom of the LED strings. |
| 5 | EN/DIM | input | On/off and dimming input where a voltage above 0.7V turns the chip on, LED current ramps from 0% to 100% as the voltage relative to INGND rises from 0.7V to 1.4V, and PWM signals of 100Hz to 1kHz must have amplitude above 1.4V. |
| 6 | INGND | power_in | Input ground reference that serves as the reference for the EN/DIM signal. |
| 7 | BST | passive | Bootstrap pin where a capacitor connected between SW and BST forms a floating supply that drives the power switch gate above the supply voltage. |
| 8 | SW | output | Switch output that is the source of the internal MOSFET and connects to the power inductor and the cathode of the Schottky rectifier. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems |
| Package | MSOP-8-EP |
| Category | Driver ICs |
| Pins | 9 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 0.187 | 0.203 | 0.219 | V | 4.5V ≤ VIN ≤ 36V | 3 |
| Feedback Current | IFB | 0.2 | μA | VFB = 0.2V | 3 | ||
| Switch-On Resistance | RDS(ON) | 0.3 | Ω | 3 | |||
| Switch Leakage | 10 | μA | VEN = 0V, VSW = 0V | 3 | |||
| Switch Current Limit | 2 | A | 3 | ||||
| Oscillator Frequency | fSW | 1 | 1.4 | 1.8 | MHz | VFB = 0.1V | 3 |
| Fold-back Frequency | 120 | kHz | VOVP < 0.4V | 3 | |||
| Maximum Duty Cycle | 89 | % | VFB = 0.1V | 3 | |||
| Minimum On-Time | tON | 100 | ns | 3 | |||
| Under Voltage Lockout Threshold Rising | 3.1 | 3.4 | 3.7 | V | Rising | 3 | |
| Under Voltage Lockout Threshold Hysteresis | 480 | mV | 3 | ||||
| EN Input Current | 2 | μA | VEN = 2V | 3 | |||
| EN Input Current | 0.1 | μA | VEN = 0V | 3 | |||
| EN OFF Threshold (w/Respect to INGND) | VEN | 0.4 | V | VEN Falling | 3 | ||
| EN ON Threshold (w/Respect to INGND) | VEN | 0.7 | V | VEN Rising | 3 | ||
| Supply Current (Quiescent) | IQ | 0.6 | 1.1 | mA | VEN = 2V, VFB = 1V | 3 | |
| Thermal Shutdown | 150 | °C | 3 | ||||
| Open LED OV Threshold | VOVP, th | 1.23 | V | 3 | |||
| Open LED OV Hysteresis | VOVP, hys | 0.1 | V | 3 | |||
| Supply Voltage VDD, VSS | VDD, VSS | 40 | V | 2 | |||
| Switch voltage (max VIN + 0.3V as printed) | VSW, VSS | -0.3 | V | 2 | |||
| Over Voltage Protection pin voltage | VOVP, VSS | -0.3 | 6 | V | 2 | ||
| EN voltage | VEN, VINGND | -0.3 | 6 | V | 2 | ||
| DIM voltage | VDIM, VINGND | -0.3 | 6 | V | 2 | ||
| Input ground to VSS voltage | VINGND, VSS | -0.3 | 40 | V | 2 | ||
| Junction Temperature | 150 | °C | 2 | ||||
| Lead Temperature | 260 | °C | 2 | ||||
| Storage Temperature | -65 | 150 | °C | 2 | |||
| Supply Voltage VDD, VSS | VDD, VSS | 4.5 | 36 | V | 2 | ||
| Operating Junction Temperature | TJ | -40 | 125 | °C | 2 | ||
| Thermal Resistance junction-to-ambient | θJA | 55 | C/W | MSOP8E (Exposed Pad), JESD51-7, 4-layer PCB | 2 | ||
| Thermal Resistance junction-to-case | θJC | 12 | C/W | MSOP8E (Exposed Pad), JESD51-7, 4-layer PCB | 2 |
CAD (KiCad official)
- Symbol:
MP2481DH-LF-Z - Footprint:
Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm - 3D model: MSOP-8-EP (KiCad packages3D, STEP)
- 3D model files:
mp2481dh-lf-z-etched.step/mp2481dh-lf-z-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mp2481dh-lf-z.step/mp2481dh-lf-z.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Monolithic Power Systems datasheet (14 pp, sha256
843a066497849b85, 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).