component
XL3845
Public Made by Adomby adom
XINLUDA AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownXL3845
XINLUDA · AC-DC Controllers And Regulators · SOP-8
XL3845 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 | Error amplifier output, made available for loop compensation, with a maximum sink current of 10 mA. |
| 2 | VFB | input | Inverting input of the error amplifier, normally connected to the switching power supply output through a resistor divider, with analog inputs limited to -0.3 V to 5.5 V. |
| 3 | ISENSE | input | Input carrying a voltage proportional to inductor current, which the PWM uses to terminate output switch conduction; the analog input is limited to -0.3 V to 5.5 V and the typical maximum input signal is 1 V. |
| 4 | RT/CT | passive | Oscillator timing pin where resistor RT connects to VREF and capacitor CT to ground, setting the oscillator frequency and maximum output duty cycle; operation up to 500 kHz is possible. |
| 5 | GROUND | power_in | Combined control circuitry and power ground, to which all voltages are referenced. |
| 6 | OUTPUT | output | Output that directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1 A. |
| 7 | VCC | power_in | Positive supply of the control IC, with a recommended supply voltage of 12 V to 28 V. |
| 8 | VREF | power_out | Reference output, nominally 5.0 V, which provides the charging current for capacitor CT through resistor RT; reference output current is limited to -20 mA. |
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 | 4 | ||
| Storage Temperature Range | Tstg | -65 | 150 | C | 4 | ||
| Junction Operating Temperature | TJ | -40 | 150 | C | 4 | ||
| Lead Temperature (soldering 10s) | 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 | 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 | 4 | |
| Thermal Resistance Junction-ambient (SOP8) | Rth j-amb | 150 | C/W | 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 | 5 | ||
| Output Short Circuit Current | ISC | -30 | -100 | -180 | mA | 5 | |
| Oscillator 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 range) | Idischg | 7.6 | 8.8 | mA | 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 = 25C | 5 | |
| Power supply rejection ratio (error amp) | 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 | |
| Error amp VOUT high | 5 | 6.2 | V | VPIN2 = 2.3V; RL = 15K to Ground | 5 | ||
| Error amp VOUT low | 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 | 5 | |
| Maximum input signal (current sense) | 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 sink) | VOL | 0.1 | 0.4 | V | ISINK = 20mA | 6 | |
| Output low level (200mA sink) | VOL | 1.6 | 2.2 | V | ISINK = 200mA | 6 | |
| Output high level (20mA source) | VOH | 13 | 13.5 | V | ISOURCE = 20mA | 6 | |
| Output high level (200mA source) | 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 | 6 | |
| Fall time | tf | 50 | 150 | ns | Tj = 25C CL = 1nF | 6 | |
| Start threshold (X843/5) | 7.8 | 8.4 | 9 | V | 6 | ||
| Min operating voltage after turn-on (X843/5) | 7 | 7.6 | 8.2 | V | 6 | ||
| Maximum duty cycle (X844/5) | 45 | 48 | 50 | % | 6 | ||
| Minimum duty cycle | 0 | % | 6 | ||||
| Start-up current (X843/45) | Ist | 0.3 | 0.5 | mA | VCC = 6.5V for X843/45 | 6 | |
| Operating supply current | Ii | 12 | 20 | mA | VPIN2 = VPIN3 = 0V | 6 | |
| Zener voltage | Viz | 34 | V | Ii = 25mA | 6 |
CAD (KiCad official)
- Symbol:
XL3845 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
xl3845-etched.step/xl3845-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);xl3845.step/xl3845.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XINLUDA datasheet (17 pp, sha256
4b7d8ea5c3774ad1, 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).