component

MP2122AGJ-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.

componentpower supply chipmp2122agj-zfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 8h ago
viewers mp2122agj-z: viewers · Ray 8h ago
mp2122agj-z-etched.glb Publish 0.1.0 · Ray 8h ago
mp2122agj-z-etched.step mp2122agj-z: factory component page (tier=lcsc) · Ray 8h ago
mp2122agj-z-hero.glb mp2122agj-z: hero GLB from the etched model (keeps the MPN mark) · Ray 8h ago
mp2122agj-z-hero.overlay.json Publish 0.1.0 · Ray 8h ago
mp2122agj-z.glb Publish 0.1.0 · Ray 8h ago
mp2122agj-z.kicad_mod Publish 0.1.0 · Ray 8h ago
mp2122agj-z.kicad_sym Publish 0.1.0 · Ray 8h ago
mp2122agj-z.lbr Publish 0.1.0 · Ray 8h ago
mp2122agj-z.step Publish 0.1.0 · Ray 8h ago
package.json Publish 0.1.0 · Ray 8h ago
page.json Set visibility: public · Ray 8h ago
README.md Publish 0.1.0 · Ray 8h ago

MP2122AGJ-Z

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

MP2122AGJ-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 FB2 input Feedback 2 is the error amplifier input for channel 2, connected to the tap of an external divider between the output and GND to set the regulation voltage (reference 0.608V).
2 EN2 input Channel 2 enable input for buck 2, with an EN high threshold of 1.2V and an EN low threshold of 0.4V over -40°C to +85°C.
3 SW2 output Channel 2 switch node connects the channel 2 high-side and low-side power MOSFETs to the inductor.
4 EN1 input Channel 1 enable input for buck 1, with an EN high threshold of 1.2V and an EN low threshold of 0.4V over -40°C to +85°C.
5 GND power_in Ground reference for the device, which also serves as the heat sink connection to the PCB GND plane.
6 SW1 output Channel 1 switch node connects the channel 1 high-side and low-side power MOSFETs to the inductor.
7 IN power_in Input supply operating from 2.7V to 6V, which requires a decoupling capacitor to ground to reduce switching spikes.
8 FB1 input Feedback 1 is the error amplifier input for channel 1, connected to the tap of an external divider between the output and GND to set the regulation voltage (reference 0.608V).

Key specifications

Parameter Value
Manufacturer Monolithic Power Systems
Package TSOT-23-8
Category Power Supply Chip
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) VIN 2.7 6 V 2
Output voltage VOUT 0.608 5.5 V 2
Operating junction temperature TJ -40 125 °C 2
Supply voltage (VIN) VIN 6.5 V 2
VSW switch node voltage VSW -0.3 6.5 V -3V for <10ns; 7.5V for <10ns 2
All other pins voltage -0.3 6.5 V 2
Junction-to-ambient thermal resistance TSOT23-8 θJA 100 °C/W JESD51-7, 4-layer PCB 2
Junction-to-case thermal resistance TSOT23-8 θJC 55 °C/W JESD51-7, 4-layer PCB 2
Supply current (quiescent) IQ 35 45 55 μA VIN = 3.6V, VEN = 2V, VFB = 0.65V 3
Shutdown current 1 μA VEN = 0V 3
IN under-voltage lockout threshold 2.4 2.5 2.6 V Rising edge 3
IN under-voltage lockout hysteresis 300 mV 3
Regulated FB voltage VFB 0.596 0.608 0.62 V TA = +25°C 3
FB input current 50 nA VFB = 0.608V 3
EN high threshold 1.2 V -40°C ≤ TA ≤ +85°C 3
EN low threshold 0.4 V -40°C ≤ TA ≤ +85°C 3
Internal soft-start time τSS 0.5 ms 3
High-side switch on resistance RDSON_P 80 mΩ VIN = 5V 3
Low-side switch on resistance RDSON_N 35 mΩ VIN = 5V 3
SW leakage current -1 0 1 μA VEN = 0V, VIN = 6V, VSW = 0V and 6V 3
High-side switch current limit 2.8 3.5 4.5 A Sourcing, D = 40% 3
Oscillator frequency 0.8 1 1.2 MHz Both channels work in CCM 3
Phase shift 180 degree 3
Minimum on time τON_MIN 90 ns 3
Minimum off time τOFF_MIN 100 ns 3
Maximum duty cycle 100 % 3
Thermal shutdown threshold 160 °C Hysteresis = 30°C 3

CAD (KiCad official)

  • Symbol: MP2122AGJ-Z
  • Footprint: Package_TO_SOT_SMD:TSOT-23-8
  • 3D model: TSOT-23-8 (KiCad packages3D, STEP)
  • 3D model files: mp2122agj-z-etched.step / mp2122agj-z-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mp2122agj-z.step / mp2122agj-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 a457df4f2372cf1c, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), 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