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XL3842

Public Made by Adom

by adom

XINLUDA AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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XL3842

XINLUDA · AC-DC Controllers And Regulators · SOP-8

XL3842 from XINLUDA, in a SOP-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 COMP output This pin is the Error Amplifier output and is made available for loop compensation.
2 VFB input This is the inverting input of the Error Amplifier, normally connected to the switching power supply output through a resistor divider.
3 ISENSE input A voltage proportional to inductor current is connected to this input, and the PWM uses it to terminate the output switch conduction.
4 RT/CT passive Resistor RT connects to Vref and capacitor CT to ground to program the oscillator frequency and maximum output duty cycle, and operation to 500kHz is possible.
5 GROUND power_in This pin is the combined control circuitry and power ground.
6 OUTPUT output This output directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1A.
7 VCC power_in This pin is the positive supply of the control IC, with a recommended supply voltage of 12 to 28 V.
8 VREF power_out This is the reference output that provides charging current for capacitor CT through resistor RT.

Key specifications

Parameter Value
Manufacturer XINLUDA
Package SOP-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (low impedance source) Vi 30 V low impedance source 4
Output Current IO 1 A 4
Output Energy (capacitive load) EO 5 J capacitive load 4
Analog Inputs (pins 2, 3) -0.3 5.5 V pins 2, 3 4
Error Amplifier Output Sink Current 10 mA 4
Power Dissipation (SO8) Ptot 800 mW Tamb 25 C (SO8) 4
Storage Temperature Range Tstg -65 150 C 4
Junction Operating Temperature TJ -40 150 C 4
Lead Temperature TL 300 C soldering 10s 4
Supply voltage VCC 12 28 V 4
Input voltage (VFB) VFB 2.5 V 4
Input voltage (ISENSE) VISENSE 1 V 4
Supply current, externally limited IVCC 25 mA externally limited 4
Average output current IOUTPUT 200 mA 4
Reference output current IVREF -20 mA 4
Oscillator frequency fOSC 100 500 kHZ 4
Operating free-air temperature (384x) TA 0 70 C 384x (XL3842, 0 to 70 C) 4
Thermal resistance junction-ambient (SOP8) Rth j-amb 150 C/W SOP8 column 4
VREF Output Voltage VREF 4.9 5 5.1 V Tj = 25C Io = 1mA 5
VREF Line Regulation VREF 8 20 mV 12V ≤ Vi ≤ 25V 5
VREF Load Regulation VREF 8 25 mV 1 ≤ Io ≤ 20mA 5
Total Output Variation 4.82 5.18 V Line, Load, Temperature 5
Long Term Stability 7 30 mV Tamb = 125C, 1000Hrs (note 2) 5
Output Short Circuit ISC -180 -100 -30 mA 5
Initial accuracy fOSC 38 52 65 KHz Tj = 25C 5
Frequency Change with Voltage fOSC/V 0.6 5 % VCC = 12V to 25V 5
Discharge Current (TJ = 25C) Idischg 7.8 8.3 8.8 mA VOSC = 2V, TJ = 25°C 5
Discharge Current (TA = Tlow to Thigh) Idischg 7.6 8.8 mA VOSC = 2V, TA = Tlow to Thigh 5
Error Amp Input Voltage V2 2.42 2.5 2.58 V VPIN1 = 2.5V 5
Error Amp Input Bias Current Ib -0.1 -2 A VFB = 5V 5
Error Amp Open-Loop Gain AVOL 65 90 dB 2V ≤ Vo ≤ 4V 5
Unity Gain Bandwidth BW 0.7 1 MHz TJ = 25°C 5
Power Supply Rejection Ratio PSRR 60 70 dB 12V ≤ Vi ≤ 25V 5
Error Amp Output Sink Current Io 2 6 mA VPIN2 = 2.7V, VPIN1 = 1.1V 5
Error Amp Output Source Current Io -0.5 -1 mA VPIN2 = 2.3V, VPIN1 = 5V 5
VOUT High VOUT 5 6.2 V VPIN2 = 2.3V; RL = 15K to Ground 5
VOUT Low VOUT 0.8 1.1 V VPIN2 = 2.7V; RL = 15K to Pin 8 5
Current Sense Gain GV 2.85 3 3.15 V/V note 3 & 4 5
Maximum Input Signal V3 0.9 1 1.1 V VPIN1 = 5V (note 3) 5
Current Sense Input Bias Current Ib -2 -10 A 5
Delay to Output 150 300 ns 5
Output Low Level (20mA) VOL 0.1 0.4 V ISINK = 20mA 6
Output Low Level (200mA) VOL 1.6 2.2 V ISINK = 200mA 6
Output High Level (20mA) VOH 13 13.5 V ISOURCE = 20mA 6
Output High Level (200mA) VOH 12 13.5 V ISOURCE = 200mA 6
UVLO Saturation VOLS 0.1 1.1 V VCC = 6V; ISINK = 1mA 6
Rise Time tr 50 150 ns Tj = 25C CL = 1nF (2) 6
Fall Time tf 50 150 ns Tj = 25C CL = 1nF (2) 6
Start Threshold (X842/4) 14.5 16 17.5 V X842/4 6
Min Operating Voltage After Turn-on (X842/4) 8.5 10 11.5 V X842/4 6
Maximum Duty Cycle (X842/3) 94 96 100 % X842/3 6
Minimum Duty Cycle 0 % 6
Start-up Current Ist 0.3 0.5 mA VCC = 14V for X842/44 6
Operating Supply Current Ii 12 20 mA VPIN2 = VPIN3 = 0V 6

CAD (KiCad official)

  • Symbol: XL3842
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: xl3842-etched.step / xl3842-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xl3842.step / xl3842.glb are the bare package body.

Provenance

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

  • Datasheet: XINLUDA datasheet (17 pp, sha256 a79edbe66e256697, retrieved 2026-10-19, 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