# MP2456GJ-Z

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

MP2456GJ-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: connect a capacitor between the SW and BST pins to form a floating supply that drives the power switch gate above the supply voltage (BST capacitor is 0.1µF-1µF per the application notes). |
| 2 | GND | power_in | Ground and voltage reference for the regulated output voltage; it requires special layout so that it is isolated from the D1-to-C1 ground path to prevent switching current spikes from inducing 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 FB is below 250mV. |
| 4 | EN | input | On/off input: pull EN above 1.35V to turn the device on, and keep the EN sink current at or below 100µA (EN may be tied to VIN through a resistor for automatic enable). |
| 5 | IN | power_in | Supply voltage input for the unregulated 4.5V-to-50V input range; input capacitor C1 is required to prevent large voltage spikes at the input. |
| 6 | SW | output | Switch output connecting the internal power MOSFET to the inductor and external Schottky diode D1; the datasheet gives no further electrical limits for this pin. |

## 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage VIN (absolute maximum) | VIN | -0.3 |  | 52 | V |  | 2 |
| Switch Voltage VSW (absolute maximum) | VSW | -0.3 |  |  | V | Upper limit printed as VIN+0.3V | 2 |
| All Other Pins Voltage (absolute maximum) |  | -0.3 |  | 6 | V |  | 2 |
| EN Sink Current (absolute maximum) |  |  |  | 100 | μA |  | 2 |
| Continuous Power Dissipation TSOT23-6 (absolute maximum) |  |  |  | 0.568 | W | TA = +25°C | 2 |
| Junction Temperature (absolute maximum) |  |  |  | 150 | °C |  | 2 |
| Lead Temperature (absolute maximum) |  |  |  | 260 | °C |  | 2 |
| Storage Temperature (absolute maximum) |  | -65 |  | 150 | °C |  | 2 |
| Supply Voltage VIN (recommended operating) | VIN | 4.5 |  | 50 | V |  | 2 |
| Output Voltage VOUT (recommended operating) | VOUT | 0.81 |  |  | V | Upper limit printed as 0.9×VIN | 2 |
| Operating Junction Temperature (recommended operating) |  | -40 |  | 125 | °C |  | 2 |
| Feedback Voltage | VFB | 0.792 | 0.812 | 0.832 | V | 4.5V ≤ VIN ≤ 50V | 3 |
| Feedback Current | IFB |  |  | 0.1 | μA | VFB = 0.85V | 3 |
| Switch Leakage Current | ISW_LKG |  |  | 1 | μA | VEN = 0V, VSW = 0V | 3 |
| Current Limit | ILIM | 1 | 1.25 | 1.5 | A |  | 3 |
| Oscillator Frequency | fSW | 0.95 | 1.2 | 1.45 | MHz | VFB = 0.6V | 3 |
| Maximum Duty Cycle | DMAX | 89 |  | 91 | % | VFB = 0.6V | 3 |
| Minimum ON-Time | τON |  |  | 50 | ns |  | 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 | 1.2 | 1.35 | 1.5 | V |  | 3 |
| EN Threshold, Falling | VEN_F | 1 | 1.17 | 1.35 | V |  | 3 |
| EN Input Current | IEN |  |  | 3.1 | μA | VEN = 2V | 3 |
| EN Input Current | IEN |  |  | 0.1 | μA | VEN = 0V | 3 |
| Supply Current (Shutdown) | IS |  | 0.1 | 1 | μA | VEN = 0V | 3 |
| Supply Current (Quiescent) | IQ |  | 0.73 | 0.85 | mA | VEN = 2V, VFB = 1V | 3 |
| Under-Voltage Lockout Threshold Hysteresis | VUVLO_HYS |  | 250 |  | mV |  | 3 |
| EN Threshold Hysteresis | VEN_HYS |  | 180 |  | mV |  | 3 |
| Foldback Frequency | fSW_F |  | 200 |  | kHz | VFB = 0V | 3 |
| Switch-On Resistance | RDS(ON) |  | 1 |  | Ω |  | 3 |
| Thermal Shutdown | TSD |  | 165 |  | °C | Derived from bench characterization, not tested in production | 3 |
| Thermal Shutdown Hysteresis | TSD_HYS |  | 20 |  | °C | Derived from bench characterization, not tested in production | 3 |
| 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 |

## CAD (KiCad official)

- Symbol: `MP2456GJ-Z`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-6`
- 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `mp2456gj-z-etched.step` / `mp2456gj-z-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mp2456gj-z.step` / `mp2456gj-z.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Monolithic Power Systems datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884073116798976) (14 pp, sha256 `f056beaa5bb1cb56`, 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](docs/mp2456gj-z-datasheet.pdf)