component
MP4420GJ-Z
Public Made by Adomby adom
Monolithic Power Systems DC-DC Converters, TSOT-23-8. 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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Contents
README
markdownMP4420GJ-Z
Monolithic Power Systems · DC-DC Converters · TSOT-23-8
MP4420GJ-Z from Monolithic Power Systems, in a TSOT-23-8. 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 | PG | output | Power Good open-drain output that goes high when the output voltage exceeds 90% of the nominal voltage (PG sink voltage 0.3V max at 4mA). |
| 2 | IN | power_in | Supply voltage input that operates from a 4V to 30V input rail, decoupled with C1 using a wide PCB trace. |
| 3 | SW | output | Switch output node that must be connected using a wide PCB trace. |
| 4 | GND | power_in | System ground and reference ground of the regulated output voltage, to be connected to GND with copper traces and vias. |
| 5 | BST | passive | Bootstrap pin that requires a capacitor between SW and BST to form a floating high-side driver supply, with a 20Ω resistor between SW and the BST capacitor strongly recommended. |
| 6 | EN/SYNC | input | Enable and synchronization pin where EN high enables the MP4420 and an external clock of 200kHz to 2.2MHz can be applied to change the switching frequency; without a pullup resistor the input voltage must be limited to 6V or less. |
| 7 | VCC | power_out | Bias supply output of the internal 5V regulator that must be decoupled with a 0.1µF to 0.22µF capacitor, not exceeding 0.22µF. |
| 8 | FB | input | Feedback input connected to the external resistor divider from the output to GND to set the output voltage (0.8V reference), with frequency fold-back below 660mV. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Monolithic Power Systems |
| Package | TSOT-23-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Current (Shutdown) | ISHDN | 8 | μA | VEN = 0V | 4 | ||
| Supply Current (Quiescent) | IQ | 0.5 | 0.7 | mA | VEN = 2V, VFB = 1V | 4 | |
| HS Switch-ON Resistance | RON_HS | 90 | 105 | mΩ | VBST-SW=5V | 4 | |
| LS Switch-ON Resistance | RON_LS | 55 | 75 | mΩ | VCC =5V | 4 | |
| Switch Leakage | ILKG SW | 1 | μA | VEN = 0V, VSW =12V | 4 | ||
| Current Limit | ILIMIT | 3.2 | 4.2 | 5.3 | A | Under 40% Duty Cycle | 4 |
| Oscillator Frequency | fSW | 320 | 410 | 500 | kHz | VFB=750mV | 4 |
| Fold-Back Frequency | fFB | 70 | 100 | 130 | kHz | VFB<400mV | 4 |
| Maximum Duty Cycle | DMAX | 92 | 95 | % | VFB=750mV, 410kHz | 4 | |
| Minimum ON Time | tON MIN | 70 | ns | 4 | |||
| Sync Frequency Range | fSYNC | 0.2 | 2.4 | MHz | 4 | ||
| Feedback Voltage | VFB | 780 | 792 | 804 | mV | 4 | |
| Feedback Current | IFB | 10 | 100 | nA | VFB=820mV | 4 | |
| EN Rising Threshold | VEN RISING | 1.15 | 1.4 | 1.65 | V | 4 | |
| EN Falling Threshold | VEN FALLING | 1.05 | 1.25 | 1.45 | V | 4 | |
| EN Threshold Hysteresis | VEN_HYS | 150 | mV | 4 | |||
| EN Input Current | IEN | 4 | 6 | μA | VEN=2V | 4 | |
| EN Input Current | IEN | 0 | 0.2 | μA | VEN=0 | 4 | |
| VIN Under-Voltage Lockout Threshold-Rising | INUVRISING | 3.3 | 3.5 | 3.7 | V | 4 | |
| VIN Under-Voltage Lockout Threshold-Falling | INUVFALLING | 3.1 | 3.3 | 3.5 | V | 4 | |
| VIN Under-Voltage Lockout Threshold-Hysteresis | INUVHYS | 200 | mV | 4 | |||
| VCC Regulator | VCC | 4.6 | 4.9 | 5.2 | V | ICC=0mA | 4 |
| VCC Load Regulation | 1.5 | 4 | % | ICC=5mA | 4 | ||
| Soft-Start Period | tSS | 0.55 | 1.45 | 2.45 | ms | VOUT from 10% to 90% | 4 |
| Thermal Shutdown | 150 | 170 | °C | 4 | |||
| Thermal Hysteresis | 30 | °C | 4 | ||||
| PG Rising Threshold | PGVth RISING | 86.5 | 90 | 93.5 | % | as percentage of VFB | 4 |
| PG Falling Threshold | PGVth FALLING | 80.5 | 84 | 87.5 | % | as percentage of VFB | 4 |
| PG Threshold Hysteresis | PGVth_HYS | 6 | % | as percentage of VFB | 5 | ||
| PG Rising Delay | PGTd_RISING | 40 | 90 | 160 | μs | 5 | |
| PG Falling Delay | PGTd_FALLING | 30 | 55 | 95 | μs | 5 | |
| PG Sink Current Capability | VPG Sink | 0.1 | 0.3 | V | Sink 4mA | 5 | |
| PG Leakage Current | ILKG_PG | 10 | 100 | nA | 5 | ||
| VIN pin voltage | VIN | -0.3 | 40 | V | 3 | ||
| VSW pin voltage | VSW | -0.3 | 41 | V | 3 | ||
| All Other Pins | -0.3 | 6 | V | 3 | |||
| Continuous Power Dissipation TSOT23-8 | 1.25 | W | TA = +25°C | 3 | |||
| Junction Temperature | 150 | °C | 3 | ||||
| Lead Temperature | 260 | °C | 3 | ||||
| Storage Temperature | -65 | 150 | °C | 3 | |||
| Continuous Supply Voltage VIN | VIN | 4 | 30 | V | 3 | ||
| Output Voltage VOUT | VOUT | 0.8 | V | 3 | |||
| Operating Junction Temp. | TJ | -40 | 125 | °C | 3 | ||
| Thermal Resistance Junction-to-Ambient | θJA | 100 | °C/W | Measured on JESD51-7, 4-layer PCB | 3 | ||
| Thermal Resistance Junction-to-Case | θJC | 55 | °C/W | Measured on JESD51-7, 4-layer PCB | 3 |
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 | 4 GND System Ground. This pin is the reference ground of the regulated output voltage, and PCB layout requires special care. For best results, connect to GND with copper traces and vias. | 6 |
CAD (KiCad official)
- Symbol:
MP4420GJ-Z - Footprint:
Package_TO_SOT_SMD:TSOT-23-8 - 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files:
mp4420gj-z-etched.step/mp4420gj-z-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mp4420gj-z.step/mp4420gj-z.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Monolithic Power Systems datasheet (20 pp, sha256
7b0073c4e419850e, 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).