component
SK6253B
Public Made by Adomby adom
Suntek DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 17d ago |
| viewers | 17d ago |
| package.json | 17d ago |
| page.json | 17d ago |
| README.md | 17d ago |
| sk6253b-etched.glb | 17d ago |
| sk6253b-etched.step | 17d ago |
| sk6253b-hero.glb | 17d ago |
| sk6253b-hero.overlay.json | 17d ago |
| sk6253b.glb | 17d ago |
| sk6253b.kicad_mod | 17d ago |
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| sk6253b.lbr | 17d ago |
| sk6253b.step | 17d ago |
SK6253B
Suntek · DC-DC Converters · SOT-23-6
SK6253B from Suntek, in a SOT-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 | GND | power_in | Ground pin; the datasheet recommends connecting GND to a large copper area to cool the chip and improve thermal performance. |
| 2 | SW | output | Switching pin; SW voltage is rated -0.3 V to VIN+1 V (-5 V to VIN+2 V for 10 ns transients), and a capacitor between SW and BS forms the high-side driver supply. |
| 3 | IN | power_in | Power supply pin; the input voltage range is 4.5 V to 16 V, with an absolute maximum VIN of 16 V. |
| 4 | FB | input | Adjustable-version feedback input, connected to the center point of the external resistor divider; the feedback voltage is 0.765 V nominal (0.746 V to 0.784 V) and the FB absolute maximum is 6 V. |
| 5 | EN | input | Drive to logic-high to enable the IC and to logic-low to disable it into micro-power shutdown; the EN rising threshold is 1.2 V, the falling threshold is 0.8 V, and the EN absolute maximum is 16 V. |
| 6 | BS | passive | Bootstrap pin; a capacitor connected between SW and BS is required to form a floating supply for the high-side switch driver, with BS voltage to SW limited to 6.5 V maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Suntek |
| Package | SOT-23-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage Range | 4.5 | 16 | V | 4 | |||
| Output Voltage Range | 0.765 | 7 | V | 4 | |||
| Feedback Voltage | 0.746 | 0.765 | 0.784 | V | 4 | ||
| Supply Current (Quiescent) | 0.6 | 0.8 | mA | VEN =3.0V | 4 | ||
| Under-Voltage Lockout Threshold, Wake up VIN Voltage | 3.9 | 4.3 | V | 4 | |||
| Under-Voltage Lockout Threshold, Shutdown VIN Voltage | 2.9 | 3.2 | V | 4 | |||
| VIN voltage (absolute maximum) | VIN | -0.3 | 16 | V | 3 | ||
| EN voltage (absolute maximum) | EN | -0.3 | 16 | V | 3 | ||
| SW voltage (absolute maximum, printed max VIN+1V) | SW | -0.3 | V | 3 | |||
| SW voltage 10ns transient (absolute maximum, printed max VIN+2V) | SW | -5 | V | 10ns transient | 3 | ||
| BS voltage (to sw) (absolute maximum) | BS | -0.3 | 6.5 | V | 3 | ||
| BS voltage (absolute maximum) | BS | -0.3 | 23.5 | V | 3 | ||
| FB voltage (absolute maximum) | -0.3 | 6 | V | 3 | |||
| Operating junction temperature (absolute maximum) | TJ | -40 | 150 | °C | 3 | ||
| Storage temperature | Tstg | -55 | 150 | °C | 3 | ||
| Lead Temperature (Soldering, 10sec.) | 260 | °C | Soldering, 10sec. | 3 | |||
| Operating junction temperature (recommended) | TJ | -40 | 125 | °C | 3 | ||
| Operating temperature range (recommended) | -40 | 85 | °C | 3 | |||
| Input voltage (recommended) | VIN | 4.5 | 16 | V | 3 | ||
| Output current (recommended) | 0 | 3 | A | 3 | |||
| Supply Current (Shutdown) | 4 | uA | VEN =0 or EN = GND | 4 | |||
| High-Side Switch On-Resistance | 70 | mΩ | ISW=100mA | 4 | |||
| Low-Side Switch On-Resistance | 50 | mΩ | ISW=-100mA | 4 | |||
| Valley Switch Current Limit | 3.1 | A | 4 | ||||
| Output UVP threshold | 60 | % | Hiccup detect (H > L) | 4 | |||
| Hiccup wait time | 2 | ms | 4 | ||||
| Hiccup time before restart | 36 | ms | 4 | ||||
| Over Voltage Protection Threshold | 18 | V | 4 | ||||
| Switching Frequency | 500 | KHz | 4 | ||||
| Maximum Duty Cycle | 94 | % | VFB=90% | 4 | |||
| Minimum Off-Time | 89 | nS | 4 | ||||
| EN Rising Threshold | 1.2 | V | 4 | ||||
| EN Falling Threshold | 0.8 | V | 4 | ||||
| Soft Start | 1.5 | mS | 4 | ||||
| Thermal Shutdown | 160 | ℃ | 4 | ||||
| Thermal Hysteresis | 30 | ℃ | 4 | ||||
| Junction-to-ambient thermal resistance | RθJA | 105 | °C/W | 4 | |||
| Junction-to-case (top) thermal resistance | RθJC(top) | 55 | °C/W | 4 | |||
| Junction-to-board thermal resistance | RθJB | 17.5 | °C/W | 4 | |||
| Junction-to-top characterization parameter | ψJT | 3.5 | °C/W | 4 | |||
| Junction-to-board characterization parameter | ψJB | 17.5 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
SK6253B - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
sk6253b-etched.step/sk6253b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sk6253b.step/sk6253b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Suntek datasheet (13 pp, sha256
3a6c225f16df4a75, retrieved 2026-10-18, 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).