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L6599AD

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STMicroelectronics AC-DC Controllers And Regulators, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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L6599AD

STMicroelectronics · AC-DC Controllers And Regulators · SO-16

L6599AD from STMicroelectronics, in a SO-16. 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 Css input Soft-start capacitor terminal; external RC network sets maximum frequency and soft-start duration, internally discharged on shutdown or overcurrent.
2 DELAY input Overcurrent delay timing capacitor; charged by 150µA internal generator, IC shuts down at 3.5V and soft-restarts below 0.3V.
3 CF output Oscillator timing capacitor; charged and discharged by internal current generators to set switching frequency.
4 RFmin output Frequency setting reference; provides 2V precision reference for external RC frequency-setting network and optocoupler feedback control.
5 STBY input Burst mode threshold input; IC enters idle state if voltage below 1.24V reference and restarts when voltage exceeds 1.29V threshold.
6 ISEN input Primary current sense input; filtered average current signal compared to 0.8V threshold (50mV hysteresis) for frequency shift and 1.5V for latched shutdown.
7 LINE input Line sensing input for brownout protection; IC shuts down at voltage below 1.24V with 13µA hysteresis and at voltage above 6V internal Zener.
8 DIS input Latched device shutdown input; voltage above 1.85V latches IC off and discharges soft-start, requiring VCC power cycle below UVLO to restart.
9 PFC_STOP tri_state Open-drain PFC controller stop output; pulled low when DIS latches, ISEN latches, LINE exceeds 6V, STBY below 1.24V, or DELAY exceeds 2V.
10 GND power_in Chip ground and current return for both low-side gate driver and IC bias circuits; must be separate from pulsed current returns.
11 LVG output Low-side gate-drive output with 0.3A minimum source and 0.8A minimum sink peak current capability, actively pulled to GND during UVLO.
12 Vcc power_in IC supply voltage for signal circuits and low-side gate driver; 0.1µF bypass capacitor to GND recommended.
13 N.C. unconnected High-voltage spacer pin not internally connected to isolate high-voltage pins and ensure compliance with PCB creepage distance safety requirements.
14 OUT power_in High-side gate-drive floating ground reference; current return for high-side gate driver, layout carefully to minimize voltage spikes.
15 HVG output High-side floating gate-drive output with 0.3A minimum source and 0.8A minimum sink peak current, internally resistively pulled to OUT during UVLO.
16 VBOOT power_in High-side gate-drive floating supply voltage; bootstrap capacitor connection between VBOOT and OUT, fed by internal synchronous bootstrap diode.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-16
Category Power Management (PMIC)
Pins 16

CAD (KiCad official)

  • Symbol: L6599AD
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SO-16 (KiCad packages3D, STEP)
  • 3D model files: l6599ad-etched.step / l6599ad-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l6599ad.step / l6599ad.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (37 pp, sha256 94697ab5d2699acc, retrieved 2026-10-05, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (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