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SK6690DP8

Suntek · DC-DC Converters · ESOP-8

SK6690DP8 from Suntek, in a ESOP-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 BST passive Bootstrap pin: a capacitor connected between SW and BST is required to form a floating supply across the high-side switch driver.
2 VIN power_in Power supply input, operating range 4.5V to 38V (absolute maximum 42V), with a ceramic bypass capacitor placed close to the pin.
3 SW power_out Switching node pin connecting the internal high-side and low-side power MOSFETs to the inductor.
4 GND power_in Ground pin, shared with the exposed pad (pin 4/9 GND/EPAD).
5 FB input Feedback input for the adjustable version, connected to the center point of the external resistor divider; VFB is 0.923V typical (0.900V to 0.946V) for SK6690DP8.
6 NC unconnected No connection.
7 EN input Enable input: drive logic-high to enable the IC, drive logic-low to disable it and enter micro-power shutdown mode (rising threshold 1.1V, falling threshold 0.9V).
8 NC unconnected No connection.
9 EPAD power_in Exposed pad, ground (GND/EPAD, pin 4/9), to be connected to a large copper area for cooling.

Key specifications

Parameter Value
Manufacturer Suntek
Package ESOP-8
Category Power Supply Chip
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
Feedback Voltage VFB 0.9 0.923 0.946 V VIN=12V, TA=25°C, SK6690DP8 4
Input Voltage Range 4.5 38 V VIN=12V, TA=25°C 4
Supply Current (Quiescent) 0.6 0.8 mA VEN =3.0V 4
Supply Current (Shutdown) 4 uA VEN =0 or EN = GND 4
Under-Voltage Lockout Wake up VIN Voltage 3.8 4.1 V 4
Under-Voltage Lockout Shutdown VIN Voltage 3.2 3.5 V 4
High-Side Switch On-Resistance 25 mΩ ISW=100mA 4
Low-Side Switch On-Resistance 15 mΩ ISW=-100mA 4
Valley Switch Current Limit 4 A 4
Over Voltage Protection Threshold 38.5 V 4
Switching Frequency 500 KHz 4
Maximum Duty Cycle 82 % VFB=90% 4
Minimum Off-Time 120 nS 4
EN Rising Threshold 1.1 V 4
EN Falling Threshold 0.9 V 4
Under-Voltage Lockout Hysteresis VIN voltage 300 mV 4
Soft Start 1.2 mS 4
Thermal Shutdown 160 ℃ 4
Thermal Hysteresis 30 ℃ 4
VIN voltage -0.3 42 V 3
EN voltage -0.3 42 V 3
SW voltage -0.3 V max printed as VIN+1V 3
SW voltage (10ns transient) -5 V max printed as VIN+2V 3
BS voltage -0.3 V max printed as Vsw+5V 3
FB voltage -0.3 6 V 3
Operating junction temperature TJ -40 150 °C 3
Storage temperature Tstg -55 150 °C 3
Lead Temperature 260 °C Soldering, 10sec. 3
Operating junction temperature -40 125 °C 3
Operating temperature range -40 85 °C 3
Input voltage VIN VIN 4.5 38 V 3
Output current 0 3 A 3
Junction-to-ambient thermal resistance RθJA 48.7 °C/W 4
Junction-to-case (top) thermal resistance RθJC(top) 52.4 °C/W 4
Junction-to-board thermal resistance RθJB 25.5 °C/W 4
Junction-to-top characterization parameter ψJT 8.4 °C/W 4
Junction-to-board characterization parameter ψJB 25.2 °C/W 4
Junction-to-case (bottom) thermal resistance θJCbot 6.5 °C/W 4

CAD (KiCad official)

  • Symbol: SK6690DP8
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: sk6690dp8-etched.step / sk6690dp8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sk6690dp8.step / sk6690dp8.glb are the bare package body.

Provenance

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

  • Datasheet: Suntek datasheet (12 pp, sha256 fa5dcb7cb0431909, retrieved 2026-10-22, 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