component
NCP1256ESN65T1G
Public Made by Adomby adom
onsemi DC-DC Converters, TSOP-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 16d ago |
| viewers | 16d ago |
| ncp1256esn65t1g-etched.glb | 16d ago |
| ncp1256esn65t1g-etched.step | 16d ago |
| ncp1256esn65t1g-hero.glb | 16d ago |
| ncp1256esn65t1g-hero.overlay.json | 16d ago |
| ncp1256esn65t1g.glb | 16d ago |
| ncp1256esn65t1g.kicad_mod | 16d ago |
| ncp1256esn65t1g.kicad_sym | 16d ago |
| ncp1256esn65t1g.lbr | 16d ago |
| ncp1256esn65t1g.step | 16d ago |
| package.json | 16d ago |
| page.json | 16d ago |
| README.md | 16d ago |
NCP1256ESN65T1G
onsemi · DC-DC Converters · TSOP-6
NCP1256ESN65T1G from onsemi, in a TSOP-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 | GND | power_in | The controller ground. |
| 2 | FB | input | Feedback pin; hooking an optocoupler collector to this pin allows regulation. |
| 3 | BO/OVP | input | Adjusts the brown-out level: a voltage below the programmed level stops the controller, and when the pin is brought above 4.5 V for four consecutive clock cycles the part latches off (on the E version it also provides auto-recovery ac line OVP). |
| 4 | CS | input | Monitors the primary peak current and provides OPP adjustment; when brought above 1.5 V during the off time the part permanently latches off. |
| 5 | Vcc | power_in | Connected to the external auxiliary supply that powers the controller, with an internal OVP comparator monitoring this pin; the maximum continuous Vcc rating is −0.3 to 28 V and the OVP comparator trips at about 26 V typical. |
| 6 | DRV | output | Driver output to an external MOSFET gate; the maximum DRV voltage is −0.3 to Vcc+0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSOP-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 |
|---|---|---|---|---|---|---|---|
| VCC increasing level at which driving pulses are authorized | VCCON | 16 | 18 | 20 | V | 5 | |
| VCC decreasing level at which driving pulses are stopped | VCC(min) | 8.3 | 8.9 | 9.5 | V | 5 | |
| Hysteresis VccON-Vcc(min) | VCCHYST | 8.4 | 9.25 | V | 5 | ||
| Latched state reset voltage | VCCreset | 8.1 | 8.8 | V | 5 | ||
| Internal IC consumption | ICC2 | 1.3 | mA | VFB = 3.2 V and CL = 0, FSW = 65 kHz | 5 | ||
| Internal IC consumption | ICC3 | 1.8 | mA | VFB = 3.2 V and CL = 1 nF, FSW = 65 kHz | 5 | ||
| DRV pin level at VCC close to VCC(min) with a 33-k resistor to GND | VDRVlow | 8 | V | VCC close to VCC(min), 33-k resistor to GND | 5 | ||
| DRV pin level at VCC = VOVP-0.2 V, DRV unloaded | VDRVhigh | 10 | 12 | 14 | V | VCC = VOVP-0.2 V, DRV unloaded | 5 |
| Maximum internal current setpoint - no OPP | VLimit | 0.744 | 0.8 | 0.856 | V | no OPP | 5 |
| Voltage on pin 3 = 2.65 V (265 V rms in) AND VFB > VfoldF: OPP current | IOPP3 | 170 | 185 | 210 | A | Voltage on pin 3 = 2.65 V AND VFB > VfoldF | 5 |
| Internal OTA for OPP current generation from BO | OPPgm | 103 | 115 | 125 | S | 5 | |
| Oscillation frequency, 65 kHz version | fOSC,nom | 61 | 65 | 70 | kHz | 65 kHz version | 6 |
| Maximum duty ratio | Dmax | 77 | 80 | 83 | % | 6 | |
| Frequency jittering in percentage of fOSC | fjitter | -5 | 5 | % | 6 | ||
| Equivalent ac resistance from FB to gnd | Req | 19 | 23 | 26 | k | 6 | |
| Minimum operating frequency | Ftrans | 22 | 26 | 30 | kHz | 6 | |
| Latching level input, brown-out input | Vlatch1 | 4.3 | 4.5 | 4.7 | V | 6 | |
| Latching level, current sense input | Vlatch2 | 1.45 | 1.5 | 1.55 | V | off time only | 6 |
| Internal auto-recovery fault timer duration | Timer | 50 | 70 | 90 | ms | 6 | |
| Latched over voltage protection on the Vcc rail | VOVP | 25.3 | 26 | 26.8 | V | 6 | |
| Turn-on voltage, BO comparator | VBOon | 0.76 | 0.8 | 0.87 | V | 6 | |
| Turn-off voltage, BO comparator | VBOoff | 0.66 | 0.7 | 0.74 | V | 6 | |
| Supply voltage Vcc pin, continuous voltage | Vcc | -0.3 | 28 | V | continuous voltage | 4 | |
| Maximum voltage on low power pins CS, FB and BO | -0.3 | 10 | V | 4 | |||
| Maximum voltage on DRV pin | VDRV | -0.3 | V | upper limit printed as Vcc+0.3 V | 4 | ||
| Maximum Junction Temperature | TJ,max | 150 | °C | 4 | |||
| Storage Temperature Range | -60 | 150 | °C | 4 | |||
| Human Body Model ESD Capability per JEDEC JESD22-A114F | HBM | 4 | kV | per JEDEC JESD22-A114F | 4 | ||
| Machine Model ESD Capability per JEDEC JESD22-A115C | MM | 200 | V | per JEDEC JESD22-A115C | 4 | ||
| Charged-Device Model ESD Capability per JEDEC JESD22-C101E | CDM | 750 | V | per JEDEC JESD22-C101E | 4 | ||
| Thermal Resistance Junction-to-Air | RθJ-A | 360 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
NCP1256ESN65T1G - Footprint:
Package_SO:TSOP-6_1.65x3.05mm_P0.95mm - 3D model: TSOP-6 (KiCad packages3D, STEP)
- 3D model files:
ncp1256esn65t1g-etched.step/ncp1256esn65t1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ncp1256esn65t1g.step/ncp1256esn65t1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (25 pp, sha256
04379d7936cf178f, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).