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MPQ2459GJ-AEC1-Z

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

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MPQ2459GJ-AEC1-Z

Monolithic Power Systems · DC-DC Converters · TSOT-23-6

MPQ2459GJ-AEC1-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: connect a capacitor between SW and BST to form a floating supply for the power-switch driver, with VBS limited to VSW + 6V (absolute maximum); the datasheet recommends a 0.1µF to 1µF BST capacitor.
2 GND power_in Ground and voltage reference for the regulated output; requires special layout, placed outside the D1-to-C1 ground path to keep switching spikes from introducing voltage noise.
3 FB input Feedback input that sets the output voltage through an external resistor divider from the output to GND; the frequency foldback comparator lowers the oscillator frequency when VFB is below 250mV to prevent current-limit runaway during a short circuit.
4 EN input ON/OFF control: pull EN above 1.2V to turn the device on, and connect a 100kΩ resistor from EN to IN for automatic enable; all other pins are rated -0.3V to +6V absolute maximum.
5 IN power_in Supply input for the 4.5V to 55V unregulated input range; requires C1 to prevent large voltage spikes at the input, with VIN absolute maximum of 60V.
6 SW output Switch output connecting the internal power MOSFET to the inductor and external Schottky diode, with VSW rated from -0.3V to VIN + 0.3V (absolute maximum).

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 VFB 0.796 0.812 0.828 V VIN = 12V, TJ = −40°C to +125°C 3
Feedback Voltage (TJ=25°C) VFB 0.8 0.812 0.824 V TJ=25°C 3
Switch-ON Resistance RDS(ON) 1 2 Ω 3
Current Limit (TJ=25°C) ILIM 1 1.25 1.5 A TJ=25°C 3
Current Limit ILIM 0.9 1.25 1.6 A 3
Oscillator Frequency fSW 360 480 600 kHz VFB = 0.6V 3
Maximum Duty Cycle DMAX 90 93.5 % VFB = 0.6V 3
Under-Voltage-Lockout Threshold, Rising VUVLO R 2.9 3.3 3.7 V 3
Under-Voltage-Lockout Threshold, Falling VUVLO F 2.65 3.05 3.45 V 3
EN Threshold Rising VEN R 1.1 1.35 1.6 V 3
EN Threshold Falling VEN F 0.9 1.17 1.3 V 3
EN Input Current IEN 3.1 5 μA VEN = 2V 3
EN Input Current IEN 0.1 1 μA VEN = 0V 3
Supply Current, Shutdown IS 0.1 1 μA VEN = 0V 3
Supply Current, Quiescent IQ 0.73 0.92 mA VEN = 2V, VFB = 1V 3
Supply Voltage VIN -0.3 60 V 2
Switch Output Voltage VSW -0.3 V Maximum printed as VIN+0.3V 2
All Other Pins -0.3 6 V 2
Continuous Power Dissipation 0.568 W TA = +25°C, TSOT23-6 2
Junction Temperature 150 °C 2
Lead Temperature 260 °C 2
Storage Temperature -65 150 °C 2
Supply Voltage VIN 4.5 55 V 2
Output Voltage VOUT 0.81 V Maximum printed as 0.95×VIN 2
Operating Junction Temp. TJ -40 125 °C 2
Thermal Resistance, Junction-to-Ambient θJA 220 °C/W Measured on JESD51-7, 4-layer PCB 2
Thermal Resistance, Junction-to-Case θJC 110 °C/W Measured on JESD51-7, 4-layer PCB 2
Feedback Current IFB 0.1 μA VFB = 0.85V 3
Switch Leakage Current ISW LKG 1 μA VEN = 0V, VSW = 0V 3
Foldback Frequency fSW F 150 kHz VFB = 0V 3
Minimum ON Time τON 100 ns 3
Under-Voltage-Lockout Threshold, Hysteresis VUVLO_HYS 250 mV 3
EN Input Hysteresis VEN HYS 180 mV 3
Thermal Shutdown TSD 165 °C 3
Thermal Shutdown Hysteresis TSD HYS 20 °C 3

CAD (KiCad official)

  • Symbol: MPQ2459GJ-AEC1-Z
  • Footprint: Package_TO_SOT_SMD:TSOT-23-6
  • 3D model: TSOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: mpq2459gj-aec1-z-etched.step / mpq2459gj-aec1-z-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mpq2459gj-aec1-z.step / mpq2459gj-aec1-z.glb are the bare package body.

Provenance

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

  • Datasheet: Monolithic Power Systems datasheet (13 pp, sha256 b58e72067d61118a, 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