component
MP2149GJ-Z
Public Made by Adomby 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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MP2149GJ-Z
Monolithic Power Systems · DC-DC Converters · TSOT-23-8
MP2149GJ-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 error amplifier input; connect to the tap of an external resistor divider between the output and GND to set the regulation voltage (0.608V reference). |
| 2 | EN2 | input | Channel 2 enable input for the buck converter; high threshold 1.2V, low threshold 0.4V. |
| 3 | SW2 | passive | Channel 2 switch node connecting the internal high-side and low-side power MOSFETs to the inductor. |
| 4 | EN1 | input | Channel 1 enable input for the buck converter; high threshold 1.2V, low threshold 0.4V. |
| 5 | GND | power_in | Ground pin; connect to a GND plane on the PCB for heat sinking. |
| 6 | SW1 | passive | Channel 1 switch node connecting the internal high-side and low-side power MOSFETs to the inductor. |
| 7 | IN | power_in | Input supply, 2.7V to 6V operating range; requires a decoupling capacitor to ground to reduce switching spikes. |
| 8 | FB1 | input | Feedback 1 error amplifier input; connect to the tap of an external resistor divider between the output and GND to set the regulation voltage (0.608V reference). |
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 | 6.5 | V | 2 | |||
| SW Voltage | VSW | -0.3 | 6.5 | V | -3V for <10ns min; 7.5V for <10ns max | 2 | |
| All Other Pins | -0.3 | 6.5 | V | 2 | |||
| Continuous Power Dissipation | PD | 1.25 | W | TA = +25°C | 2 | ||
| Output Voltage | VOUT | 0.608 | 5.5 | V | 2 | ||
| Operating Junction Temperature | TJ | -40 | 125 | °C | 2 | ||
| Thermal Resistance Junction-Ambient | θJA | 100 | °C/W | TSOT23-8, JESD51-7 4-layer PCB | 2 | ||
| Thermal Resistance Junction-Case | θJC | 55 | °C/W | TSOT23-8, 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 | 0 | 1 | μA | VEN = 0V | 3 | ||
| IN Under-Voltage Lockout Threshold | 2.4 | 2.5 | 2.6 | V | Rising edge | 3 | |
| Regulated FB Voltage | VFB | 0.596 | 0.608 | 0.62 | V | TA = +25°C | 3 |
| FB Input Current | -10 | 50 | nA | VFB = 0.608V | 3 | ||
| SW Leakage Current | -1 | 0 | 1 | μA | VEN = 0V; VIN = 6V; VSW = 0V and 6V | 3 | |
| Oscillator Frequency | 0.8 | 1 | 1.2 | MHz | Both channels work in CCM | 3 | |
| IN Under-Voltage Lockout Hysteresis | 300 | mV | 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 | 100 | mΩ | VIN=5V | 3 | ||
| Low-Side Switch On-Resistance | RDSON_N | 40 | mΩ | VIN=5V | 3 | ||
| High-Side Switch Current Limit | 2.5 | A | Sourcing, D=40% | 3 | |||
| Minimum ON Time | τON_MIN | 90 | ns | Guarantee by design | 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:
MP2149GJ-Z - Footprint:
Package_TO_SOT_SMD:TSOT-23-8 - 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files:
mp2149gj-z-etched.step/mp2149gj-z-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mp2149gj-z.step/mp2149gj-z.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Monolithic Power Systems datasheet (13 pp, sha256
6f6e037e94814d85, retrieved 2026-10-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).
# MP2149GJ-Z
**Monolithic Power Systems** · DC-DC Converters · TSOT-23-8
MP2149GJ-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 error amplifier input; connect to the tap of an external resistor divider between the output and GND to set the regulation voltage (0.608V reference). |
| 2 | EN2 | input | Channel 2 enable input for the buck converter; high threshold 1.2V, low threshold 0.4V. |
| 3 | SW2 | passive | Channel 2 switch node connecting the internal high-side and low-side power MOSFETs to the inductor. |
| 4 | EN1 | input | Channel 1 enable input for the buck converter; high threshold 1.2V, low threshold 0.4V. |
| 5 | GND | power_in | Ground pin; connect to a GND plane on the PCB for heat sinking. |
| 6 | SW1 | passive | Channel 1 switch node connecting the internal high-side and low-side power MOSFETs to the inductor. |
| 7 | IN | power_in | Input supply, 2.7V to 6V operating range; requires a decoupling capacitor to ground to reduce switching spikes. |
| 8 | FB1 | input | Feedback 1 error amplifier input; connect to the tap of an external resistor divider between the output and GND to set the regulation voltage (0.608V reference). |
## 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 | | | 6.5 | V | | 2 |
| SW Voltage | VSW | -0.3 | | 6.5 | V | -3V for <10ns min; 7.5V for <10ns max | 2 |
| All Other Pins | | -0.3 | | 6.5 | V | | 2 |
| Continuous Power Dissipation | PD | | | 1.25 | W | TA = +25°C | 2 |
| Output Voltage | VOUT | 0.608 | | 5.5 | V | | 2 |
| Operating Junction Temperature | TJ | -40 | | 125 | °C | | 2 |
| Thermal Resistance Junction-Ambient | θJA | | 100 | | °C/W | TSOT23-8, JESD51-7 4-layer PCB | 2 |
| Thermal Resistance Junction-Case | θJC | | 55 | | °C/W | TSOT23-8, 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 | | 0 | | 1 | μA | VEN = 0V | 3 |
| IN Under-Voltage Lockout Threshold | | 2.4 | 2.5 | 2.6 | V | Rising edge | 3 |
| Regulated FB Voltage | VFB | 0.596 | 0.608 | 0.62 | V | TA = +25°C | 3 |
| FB Input Current | | -10 | | 50 | nA | VFB = 0.608V | 3 |
| SW Leakage Current | | -1 | 0 | 1 | μA | VEN = 0V; VIN = 6V; VSW = 0V and 6V | 3 |
| Oscillator Frequency | | 0.8 | 1 | 1.2 | MHz | Both channels work in CCM | 3 |
| IN Under-Voltage Lockout Hysteresis | | | 300 | | mV | | 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 | | 100 | | mΩ | VIN=5V | 3 |
| Low-Side Switch On-Resistance | RDSON_N | | 40 | | mΩ | VIN=5V | 3 |
| High-Side Switch Current Limit | | | 2.5 | | A | Sourcing, D=40% | 3 |
| Minimum ON Time | τON_MIN | | 90 | | ns | Guarantee by design | 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: `MP2149GJ-Z`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-8`
- 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files: `mp2149gj-z-etched.step` / `mp2149gj-z-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mp2149gj-z.step` / `mp2149gj-z.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Monolithic Power Systems datasheet](docs/mp2149gj-z-datasheet.pdf) (13 pp, sha256 `6f6e037e94814d85`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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](docs/mp2149gj-z-datasheet.pdf)