# NCP3064MNTXG

**onsemi** · DC-DC Converters · DFN-8-EP(4x4)

NCP3064MNTXG from onsemi, in a DFN-8-EP(4x4). 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 | Switch Collector | output | Internal Darlington switch collector, rated VSWC −0.3 V to 42 V with a peak switch current of 1.5 A. |
| 2 | Switch Emitter | output | Internal Darlington switch emitter, rated −0.6 V to VCC with the transistor off. |
| 3 | Timing Capacitor | passive | Oscillator input for the timing capacitor CT, with pin voltage limited to −0.2 V to +1.4 V. |
| 4 | GND | power_in | Ground pin for all internal circuits; the exposed pad must be tied to this pin on the PCB. |
| 5 | Comparator Inverting Input | input | Inverting input of the internal comparator, rated −0.3 V to VCC. |
| 6 | VCC | power_in | Voltage supply; absolute maximum rating is −0.3 V to 42 V, and the stated input voltage range is 3.0 V to 40 V. |
| 7 | Ipk Sense | input | Peak current sense input that monitors the voltage drop across an external resistor, with a 200 mV current-limit sense threshold and a rating of −0.3 V to VCC + 0.3 V. |
| 8 | ON/OFF | input | Logic input where a High level above about 1.4 V (up to 25 V max, and below VCC) enables operation and a Low level or floating input puts the part in standby below 100 µA. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DFN-8-EP(4x4) |
| Category | Power Management ICs |
| Pins | 9 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC supply voltage | VCC | -0.3 |  | 42 | V | Pin 6; measured vs. Pin 4 | 3 |
| Comparator inverting input voltage | VCII | -0.3 |  |  | V | Pin 5; upper limit printed as VCC | 3 |
| Darlington switch emitter voltage (transistor OFF) | VSWE | -0.6 |  |  | V | Pin 2; transistor OFF; upper limit printed as VCC | 3 |
| Darlington switch collector voltage | VSWC | -0.3 |  | 42 | V | Pin 1; measured vs. Pin 4 | 3 |
| Darlington switch collector to emitter voltage | VSWCE | -0.3 |  | 42 | V | Pins 1 and 2; measured vs. Pin 4 | 3 |
| Darlington switch peak current | ISW |  |  | 1.5 | A |  | 3 |
| Ipk sense voltage | VIPK | -0.3 |  |  | V | Pin 7; upper limit printed as VCC + 0.3 V | 3 |
| Timing capacitor pin voltage | VTC | -0.2 |  | 1.4 | V | Pin 3 | 3 |
| ON/OFF pin voltage | VON/OFF | -0.3 |  | 25 | V | Pin 8; also printed as less than VCC | 3 |
| Lead temperature soldering reflow (SMD styles, Pb-Free versions) | TSLD |  |  | 260 | C |  | 3 |
| Storage temperature range | TSTG | -65 |  | 150 | C |  | 3 |
| Maximum junction temperature | TJ MAX |  |  | 150 | C |  | 3 |
| Operation junction temperature range (NCP3064) | TJ | 0 |  | 70 | C | NCP3064 grade (not NCP3064B/NCV3064) | 3 |
| Oscillator frequency | fOSC | 110 | 150 | 190 | kHz | VPin 5 = 0 V, CT = 2.2 nF, TJ = 25C | 4 |
| Discharge to charge current ratio | IDISCHG / ICHG | 5.5 | 6 | 6.5 | − | Pin 7 to VCC, TJ = 25C | 4 |
| Current limit sense voltage | VIPK | 165 | 200 | 235 | mV | TJ = 25C | 4 |
| Darlington switch collector to emitter voltage drop | VSWCE |  | 1 | 1.3 | V | ISW = 1.0 A, TJ = 25C (Note 6) | 4 |
| Collector off-state current | IC(OFF) |  | 1 | 10 | µA | VCE = 40 V | 4 |
| Threshold voltage accuracy (NCP3064 row) | VTH | -1.5 |  | 1.5 | % |  | 4 |
| Threshold voltage line regulation | REGLINE | -6 | 2 | 6 | mV | VCC = 3.0 V to 40 V | 4 |
| Comparator inverting input bias current | ICII | -1000 | -100 | 1000 | nA | Vin = Vth | 4 |
| ON/OFF pin logic input level high | VIH | 2.2 |  |  | V | VOUT = Nominal Output Voltage; TJ = 25C | 4 |
| ON/OFF pin logic input level low | VIL |  |  | 1 | V | VOUT = 0 V; TJ = 25C | 4 |
| Supply current | ICC |  |  | 7 | mA | VCC = 5.0 V to 40 V, CT = 2.2 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = GND, remaining pins open | 4 |
| Thermal resistance junction-to-air (DFN-8) | RJA |  | 78 |  | C/W | DFN-8; 1 oz copper, 1 in2 copper area (Note 5) | 3 |
| Thermal resistance junction-to-case (DFN-8) | RJC |  | 14 |  | C/W | DFN-8; 1 oz copper, 1 in2 copper area (Note 5) | 3 |
| Capacitor charging current | IC |  | 275 |  | µA | Pin 7 to VCC, TJ = 25C | 4 |
| Capacitor discharging current | IDISCH |  | 1.65 |  | mA | Pin 7 to VCC, TJ = 25C | 4 |
| Threshold voltage | VTH |  | 1.25 |  | V | TJ = 25C | 4 |
| ON/OFF pin input current (high) | IIH |  | 15 |  | µA | ON/OFF Pin = 5 V (ON), TJ = 25C | 4 |
| ON/OFF pin input current (low) | IIL |  | 1 |  | µA | ON/OFF Pin = 0 V (OFF), TJ = 25C | 4 |
| Standby quiescent current | ISTBY |  | 85 |  | µA | ON/OFF Pin = 0 V (OFF), TJ = 25C | 4 |
| Thermal shutdown threshold | TSHD |  | 160 |  | C |  | 4 |
| Thermal shutdown hysteresis | TSHDHYS |  | 10 |  | C |  | 4 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 4. The pins which are not defined may not be loaded by external signals. 5. 1 oz copper, 1 in2 copper area. | 3 |

## CAD (KiCad official)

- Symbol: `NCP3064MNTXG`
- Footprint: `Package_DFN_QFN:DFN-8-1EP_4x4mm_P0.8mm_EP2.5x3.6mm`
- 3D model: DFN-8-EP(4x4) (KiCad packages3D, STEP)
- 3D model files: `ncp3064mntxg-etched.step` / `ncp3064mntxg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncp3064mntxg.step` / `ncp3064mntxg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/ncp3064mntx-d.pdf) (21 pp, sha256 `751343e3af3486ff`, retrieved 2026-10-30, tier: manufacturer)
- **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/ncp3064mntxg-datasheet.pdf)