component
MP2451DJ-LF-Z
Public Made by Adomby adom
Monolithic Power Systems DC-DC Converters, TSOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMP2451DJ-LF-Z
Monolithic Power Systems · DC-DC Converters · TSOT-23-6
MP2451DJ-LF-Z from Monolithic Power Systems, in a TSOT-23-6. 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 | BST | power_out | Bootstrap pin, the positive supply for the internal floating high-side MOSFET driver; connect a bypass capacitor between BST and SW. |
| 2 | GND | power_in | Ground; connect as close as possible to the output capacitor, avoiding the high-current switch paths. |
| 3 | FB | input | Feedback input to the error amplifier; an external divider from VOUT to GND is compared to the internal +0.8V reference to set the output voltage. |
| 4 | EN | input | Enable input with about 1.55V rising threshold and 0.3V hysteresis; floating shuts the chip down, and the EN sink current must be limited to under 100µA when tied to VIN through a resistor. |
| 5 | VIN | power_in | Input supply for the control circuitry, bootstrap regulators and high-side switch, operating from 3.3V to 36V, with a decoupling capacitor to ground required close to this pin. |
| 6 | SW | output | Switch node, the output of the high-side switch; a low-VF Schottky diode to ground is required close to this pin to reduce switching spikes. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems |
| Package | TSOT-23-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | 0.778 | 0.794 | 0.81 | V | 4.0V < VIN < 36V | 4 | |
| Feedback Voltage | 0.77 | 0.794 | 0.818 | V | 3.3V < VIN < 4.0V | 4 | |
| Enable up Threshold | 1.4 | 1.55 | 1.7 | V | 4 | ||
| Oscillator Frequency | 1600 | 2000 | 2400 | kHz | 4 | ||
| Upper Switch Leakage Current | 0.1 | 1 | μA | VEN = 0V, VSW = 0V | 4 | ||
| Shutdown Supply Current | 3 | 15 | μA | VEN = 0V | 4 | ||
| VIN UVLO Up Threshold | 2.7 | 3.2 | V | 4 | |||
| Supply Voltage | VIN | -0.3 | 40 | V | 3 | ||
| Switch Voltage VSW (max = VIN (MAX) + 0.3V) | VSW | -0.3 | V | 3 | |||
| BST to SW | -0.3 | 6 | V | 3 | |||
| Enable (VEN) | VEN | 8 | V | 3 | |||
| Enable Sink Current | IEN | 100 | μA | 3 | |||
| All Other Pins | -0.3 | 5 | V | 3 | |||
| Continuous Power Dissipation | 0.57 | W | TA=+25C | 3 | |||
| Junction Temperature | 150 | C | 3 | ||||
| Lead Temperature | 260 | C | 3 | ||||
| Storage Temperature | -65 | 150 | C | 3 | |||
| Supply Voltage VIN | VIN | 3.3 | 36 | V | 3 | ||
| Output Voltage VOUT (max = 0.8*VIN) | VOUT | 0.8 | V | 3 | |||
| Operating Junction Temp (TJ) | TJ | -40 | 125 | C | 3 | ||
| Upper Switch On Resistance | 500 | mΩ | VBST-VSW=5V | 4 | |||
| Current Limit | 1 | A | 4 | ||||
| COMP to Current Sense Transconductance | GCS | 3 | A/V | 4 | |||
| Minimum Operating VIN Voltage | 3.3 | V | 4 | ||||
| VIN UVLO Hysteresis | 0.4 | V | 4 | ||||
| Soft-start time | 0.5 | msec | FB from 0 to 1.8V | 4 | |||
| Minimum Switch On Time | 100 | ns | 4 | ||||
| Average Quiescent Supply Current | 130 | uA | No load, VFB=0.9 | 4 | |||
| Thermal Shutdown | 150 | C | 4 | ||||
| Enable Threshold Hysteresis | 0.3 | V | 4 | ||||
| Enable Clamping Voltage | 7.5 | V | 4 | ||||
| Thermal Resistance junction-to-ambient, TSOT23-6 | θJA | 220 | C/W | JESD51-7, 4-layer PCB | 3 | ||
| Thermal Resistance junction-to-case, TSOT23-6 | θJC | 110 | C/W | JESD51-7, 4-layer PCB | 3 |
CAD (KiCad official)
- Symbol:
MP2451DJ-LF-Z - Footprint:
Package_TO_SOT_SMD:TSOT-23-6 - 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
mp2451dj-lf-z-etched.step/mp2451dj-lf-z-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mp2451dj-lf-z.step/mp2451dj-lf-z.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Monolithic Power Systems datasheet (16 pp, sha256
8ad0f9bac9dea634, retrieved 2026-10-19, 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).