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MPQ2143DJ-AEC1-LF-Z

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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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MPQ2143DJ-AEC1-LF-Z

Monolithic Power Systems · DC-DC Converters · TSOT-23-8

MPQ2143DJ-AEC1-LF-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 Open-drain power-good indicator with an internal 500kΩ pull-up to VIN; it is pulled up when FB is within ±10% of the regulation level and is LOW when FB is outside that window.
2 VIN power_in Supply voltage input for the 2.5V to 5.5V unregulated input; C1 prevents large voltage spikes from appearing at the input.
3 SW output Switch output node of the internal power stage; the absolute maximum rating is -3V for less than 5ns to VIN+0.3V.
4 PGND power_in Power ground for the power stage.
5 OUT input Input sense pin used for output voltage feedback.
6 AGND power_in Analog ground that serves as the reference for the internal control circuit.
7 FB input Feedback pin; connect an external resistor divider from the output to GND to set the output voltage, which can be regulated as low as 0.6V.
8 EN input On/off control; the device is enabled when EN is pulled above 1.2V and is disabled when EN is left floating or grounded (internal 1MΩ resistor to ground).

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 Voltage VIN 6 V 2
VSW Pin Voltage VSW -3 V min applies for < 5ns; max printed as VIN+0.3V (not numeric) 2
All Other Pins Voltage -0.3 6 V 2
Junction Temperature 150 °C 2
Continuous Power Dissipation 1.25 W TA = 25°C 2
Storage Temperature -65 150 °C 2
Supply Voltage VIN 2.5 5.5 V 2
Output Voltage VOUT 0.6 V max printed as VIN -0.5V (not numeric) 2
Operating Junction Temperature TJ -40 125 °C 2
Feedback Voltage tolerance VFB -1.5 1.5 % 2.5V ≤ VIN ≤ 5.5V 3
Feedback Voltage tolerance VFB -2 2 % TJ=-40°C to +125°C 3
Under-Voltage Lockout Threshold (rising) 2 2.2 2.4 V Rising 3
Switching frequency tolerance fs -20 20 % VIN=5V, VOUT=1.2V, IOUT=1A 3
Switching frequency tolerance fs -25 25 % TJ=-40°C to +125°C 3
Power-Good Upper Trip Threshold PGH 10 % FB voltage respect to the regulation 3
Power-Good Lower Trip Threshold PGL -10 % FB voltage respect to the regulation 3
Switch Leakage 0.1 2 μA VEN = 0V, VIN = 5V, TJ=+25°C 3
PFET Current Limit 4.2 4.8 A TJ=+25°C 3
Feedback Voltage VFB 0.6 V 2.5V ≤ VIN ≤ 5.5V 3
Feedback Current IFB 10 nA VFB = 0.63V 3
PFET Switch ON Resistance RDSON_P 65 mΩ 3
NFET Switch ON Resistance RDSON_N 40 mΩ 3
Switch Leakage 35 μA VEN = 0V, VIN = 5V, TJ=-40°C to +125°C 3
PFET Current Limit 4 A TJ=-40°C to +125°C 3
NFET Switch Sinking Current INSW 100 μA VOUT=1.2V, VFB=0.7V 3
ON Time tON 200 nS VIN=5V, VOUT=1.2V 3
ON Time tON 277 nS VIN=3.6V, VOUT=1.2V 3
Switching frequency fs 1200 kHz VIN=5V, VOUT=1.2V, IOUT=1A 3
Minimum OFF Time tMIN-OFF 50 ns 3
Soft-Start Time tSS-ON 1.3 ms 3
Soft-Stop Time tSS-OFF 1 ms 3
Power-Good Delay PGD 110 μs 3
Power-Good Sink Current Capability (VPG-L) VPG-L 0.4 V Sink 1mA 3
Power-Good Logic High Voltage VPG-H 4.9 V VIN=5V, VFB=0.6V, TJ=+25°C 3
Power-Good Logic High Voltage VPG-H 4.85 V VIN=5V, VFB=0.6V, TJ=-40°C to +125°C 3
Power-Good Internal Pull-Up Resistor RPG 500 kΩ 3
Under-Voltage Lockout Threshold Hysteresis 150 mV 3
EN Input Logic Low Voltage 0.4 V 3
EN Input Logic High Voltage 1.2 V 3
EN Input Current 2 μA VEN=2V 4
EN Input Current 0.1 μA VEN=0V 4
Supply Current (Shutdown) 0.1 μA VEN=0V 4
Supply Current (Quiescent) 40 μA VEN=2V, VFB=0.63V, VIN=3.6V 4
Thermal Shutdown 150 °C 4
Thermal Hysteresis 30 °C 4
Thermal Resistance junction-to-ambient θJA 100 °C/W TSOT23-8, measured on JESD51-7 4-layer PCB 2
Thermal Resistance junction-to-case θJC 55 °C/W TSOT23-8 2

CAD (KiCad official)

  • Symbol: MPQ2143DJ-AEC1-LF-Z
  • Footprint: Package_TO_SOT_SMD:TSOT-23-8
  • 3D model: TSOT-23-8 (KiCad packages3D, STEP)
  • 3D model files: mpq2143dj-aec1-lf-z-etched.step / mpq2143dj-aec1-lf-z-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mpq2143dj-aec1-lf-z.step / mpq2143dj-aec1-lf-z.glb are the bare package body.

Provenance

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

  • Datasheet: Monolithic Power Systems datasheet (16 pp, sha256 4cb4951458037ab4, retrieved 2026-10-21, 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