component

MP4420GJ-Z

Public Made by Adom

by adom

Monolithic Power Systems DC-DC Converters, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MP4420GJ-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mp4420gj-z.step / mp4420gj-z.glb are 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, 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