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MP2359DJ-LF-Z

Public Made by Adom

by adom

Monolithic Power Systems Global Sourcing Parts, TSOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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MP2359DJ-LF-Z

Monolithic Power Systems · Global Sourcing Parts · TSOT-23-6

MP2359DJ-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 passive Bootstrap pin: a capacitor connected between SW and BST forms a floating supply that drives the power switch gate above the supply voltage.
2 GND power_in Ground and voltage reference for the regulated output; it should be routed outside the D1-to-C1 ground path so switching current spikes do not couple noise into the part.
3 FB input Feedback input from the external resistor divider that sets VOUT (0.81V reference); the frequency foldback comparator lowers the oscillator frequency when FB is below 250mV.
4 EN input On/off control input that must be pulled above 1.2V to turn the device on, and a 100kΩ resistor to VIN gives automatic enable; maximum input current into EN is 300μA.
5 IN power_in Unregulated supply input operating from +4.5V to +24V, requiring input capacitor C1 to prevent large voltage spikes.
6 SW output Switch output connecting the internal power MOSFET to the inductor and external Schottky rectifier.

Key specifications

Parameter Value
Manufacturer Monolithic Power Systems
Package TSOT-23-6
Category Global Sourcing Parts
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 VFB 0.79 0.81 0.83 V 4.5V ≤ VIN ≤ 24V 3
Oscillator Frequency fSW 1.2 1.4 1.7 MHz VFB = 0.6V 3
Under Voltage Lockout Threshold Rising 2.5 2.8 3.1 V 3
Supply Current (Shutdown) IS 0.1 1 μA VEN = 0V 3
Supply Current (Quiescent) IQ 0.8 1 mA VEN = 2V, VFB = 1V 3
Feedback Current IFB 0.1 μA VFB = 0.8V 3
Switch-On Resistance RDS(ON) 0.35 Ω 3
Switch Leakage 10 μA VEN = 0V, VSW = 0V 3
Current Limit 1.8 A 3
Fold-back Frequency 460 kHz VFB = 0V 3
Maximum Duty Cycle 87 % VFB = 0.6V 3
Minimum On-Time tON 100 ns 3
Under Voltage Lockout Threshold Hysteresis 150 mV 3
EN Input Low Voltage 0.4 V 3
EN Input High Voltage 1.2 V 3
EN Input Current 0.1 μA VEN = 0V 3
EN Input Current 2.1 VEN = 2V 3
Thermal Shutdown 150 °C 3
Supply Voltage VIN VIN 26 V 2
Supply Voltage VSW VSW 27 V 2
All Other Pins -0.3 6 V 2
Continuous Power Dissipation PD 0.568 W TA = +25°C, TSOT23-6 2
Junction Temperature TJ 150 °C 2
Storage Temperature TSTG -65 150 °C 2
Supply Voltage VIN VIN 4.5 24 V 2
Output Voltage VOUT VOUT 0.81 15 V 2
Ambient Temperature TA -40 85 °C 2
Max input current into the EN pin 300 μA 2
Thermal Resistance junction-to-ambient TSOT23-6 θJA 220 °C/W Measured on JESD51-7, 4-layer PCB 2
Thermal Resistance junction-to-case TSOT23-6 θJC 110 °C/W Measured on JESD51-7, 4-layer PCB 2

CAD (KiCad official)

  • Symbol: MP2359DJ-LF-Z
  • Footprint: Package_TO_SOT_SMD:TSOT-23-6
  • 3D model: TSOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: mp2359dj-lf-z-etched.step / mp2359dj-lf-z-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mp2359dj-lf-z.step / mp2359dj-lf-z.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Monolithic Power Systems datasheet (11 pp, sha256 faf7e8160f22b7be, retrieved 2026-10-17, 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