component

LD5535E1GL

Public Made by Adom

by adom

Leadtrend Tech AC-DC Controllers And Regulators, SOT-26-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LD5535E1GL

Leadtrend Tech · AC-DC Controllers And Regulators · SOT-26-6

LD5535E1GL from Leadtrend Tech, in a SOT-26-6. 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 reference pin for the controller.
2 COMP input Voltage feedback pin (same as the COMP pin in UC384X) that connects to a photo-coupler to close the control loop and achieve regulation.
3 OTP input Pulling this pin below 0.95V latches the controller off until AC power is cycled; an NTC to ground gives over-temperature protection, and floating it or using a 100k resistor disables the latch protection.
4 CS input Current sense pin that senses the MOSFET current for peak-current and pulse-by-pulse limit; absolute maximum rating is -0.3V to 6V.
5 VCC power_in Supply voltage pin; recommended operating range is 8.5V to 26.5V with an absolute maximum of 30V.
6 OUT output Gate drive output that drives the external power MOSFET; absolute maximum range is -0.3V to VCC+0.3V.

Key specifications

Parameter Value
Manufacturer Leadtrend Tech
Package SOT-26-6
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
Operating Junction Temperature TJ -40 125 C 4
Supply VCC Voltage VCC 8.5 26.5 V 4
VCC Capacitor 3.3 10 F Printed unit glyph is missing in extracted text; micro prefix not confirmed 4
Start-up resistor Value (AC Side, Half Wave) 540 2.2 K / M (as printed) AC side, half wave; printed as 540K and 2.2M 4
COMP Pin Capacitor 1 10 nF 4
CS Pin Capacitor Value 47 390 pF 4
Supply Voltage VCC VCC -0.3 30 V 4
COMP, CS, OTP pin voltage COMP, CS, OTP -0.3 6 V 4
OUT pin voltage OUT -0.3 V Upper limit printed as VCC+0.3V 4
Maximum Junction Temperature 150 C 4
Storage Temperature Range -65 150 C 4
Lead temperature (Soldering) 260 C Soldering, 10 sec 4
ESD Voltage Protection, Human Body Model 2.5 kV Human body model 4
ESD Voltage Protection, Machine Model 250 V Machine model 4
Power Dissipation (SOT-26) 200 mW Ambient Temperature = 85C 4
UVLO(OFF) VCCOFF 6.5 7.5 8.5 V OUT OFF 5
UVLO(ON) VCCON 15 16 17 V 5
VCC OVP Level VCCOVP 27 28 29 V 5
Maximum Input Voltage (VCS_MIN) VCS_MIN 0.59 0.69 0.79 V For High Line 5
Maximum Input Voltage (VCS_OFF) VCS_LIMIT 0.82 V 5
Output High Level VOH 9 14 V VCC =15V, Io=20mA 5
Output High Clamp Level VO_CLAMP 10.5 11.5 12.5 V VCC =18V 5
CCM Frequency FCCM 60 65 70 kHz 6
Frequency Swapping FSW_MOD -8 8 % Guaranteed by design 6
Green Mode Frequency FSW_GREEN 21 24 27 kHz 6
Temp. Stability FSW_TS 3 5 % Guaranteed by design 6
Maximum Duty DMAX 81 % Guaranteed by design 6
OTP Pin Source Current IOTP 90 100 110 A Micro prefix missing in extracted text 6
Startup Current ICC_ST 1 A VCC < UVLO(ON); micro prefix missing in extracted text 5
Operating Current (with 1nF load on OUT Pin) ICC_OP1 0.285 mA VCOMP=0V, OUT=1nF 5
Operating Current (with 1nF load on OUT Pin) ICC_OP2 1.9 mA VCOMP=1.7V, OUT=1nF 5
Auto current protection ICC_OPA1 0.6 mA 5
VCC OVP de-bounce time TVCC_OVP 8 Cycle 5
Short Circuit Current ICOMP 0.11 mA VCOMP=0V 5
Open Loop Voltage VCOMP_OPEN 3.15 V 5
Zero Duty Threshold VCOMP VZDC 0.5 V 5
Zero Duty Hysteresis VZDCH 100 mV 5
Leading Edge Blanking Time TLEB 200 ns 5
Internal Slope Compensation VSLP_L 330 mV 0% to DMAX. (Linearly increase); guaranteed by design 5
Input impedance ZCS 1 M Guaranteed by design; unit printed as M (Ohm symbol not extracted) 5
Delay to Output TPD 100 ns Guaranteed by design 5
Output Low Level VOL 1 V VCC =15V, Io=20mA; guaranteed by design 5
Rising Time Tr 200 ns VCC =15V CL=1000pF 5
Falling Time Tf 30 ns VCC =15V CL =1000pF 5
Voltage Stability FSW_VS 1 % VCC =9V~24V; guaranteed by design 6
Soft Start Time TSS 7 ms VCS_OFF from 0.2V to 0.5V; guaranteed by design 6
OLP Trip Level VOLP 2.8 V 6
OLP delay time TD_OLP 88 ms After soft-start 6
CS OVP Trip Current Level VCSOVP 0.31 V 6
CS OVP De-bounce Cycle TD_CSOVP 8 Cycle Guaranteed by design 6
OTP Turn-On Trip Level VOTP_ON 1.05 V 6
OTP Turn-Off Trip Level VOTP_OFF 0.95 V 6
OTP pin de-bounce time TD_OTP 550 s VCOMP > 2V; micro prefix missing in extracted text 6
OTP Level TUP_OTP 140 C Guaranteed by design 6
OTP Hysteresis TINOTP_HYS 15 C Guaranteed by design 6
SDSP CS Pin Level Secondary diode short VCS_SDSP 1.2 V 6
De-bounce Cycle (SDSP) TD_SDSP 4 Cycle Guaranteed by design 6
Package Thermal Resistance (SOT-26) JA 200 C/W SOT-26 4

CAD (KiCad official)

  • Symbol: LD5535E1GL
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-26-6 (KiCad packages3D, STEP)
  • 3D model files: ld5535e1gl-etched.step / ld5535e1gl-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld5535e1gl.step / ld5535e1gl.glb are the bare package body.

Provenance

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

  • Datasheet: Leadtrend Tech datasheet (15 pp, sha256 6f4a0f6133abf60e, retrieved 2026-10-18, tier: lcsc)
  • 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