component
UC3526DWTR
Public Made by Adomby adom
Texas Instruments DC-DC Controllers, SOIC-18-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownUC3526DWTR
Texas Instruments · DC-DC Controllers · SOIC-18-300mil
UC3526DWTR from Texas Instruments, in a SOIC-18-300mil. 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 | +Error | input | Non-inverting input of the transconductance error amplifier, with input common-mode range of 0 to +5.2V. |
| 2 | -Error | input | Inverting input of the error amplifier, used with +Error for the voltage feedback connection to the supply output. |
| 3 | Comp | output | Error amplifier output (2MΩ output impedance) where loop compensation is connected as shunt reactance to ground, feeding the PWM comparator. |
| 4 | Css | passive | Soft-start capacitor connection, charged by an internal 100µA current source after RESET goes HIGH and held discharged during undervoltage lockout. |
| 5 | Reset | bidirectional | Active-LOW TTL/CMOS-compatible digital port that discharges the soft-start capacitor when held LOW and is held LOW by undervoltage lockout. |
| 6 | -Current Sense | input | Inverting input of the current limit comparator, with a typical 100mV sense voltage threshold. |
| 7 | +Current Sense | input | Non-inverting input of the current limit comparator, with a typical 100mV sense voltage threshold. |
| 8 | Shutdown | bidirectional | Active-LOW TTL/CMOS-compatible digital port that immediately inhibits all PWM output pulses when pulled LOW. |
| 9 | RTIMING | passive | Oscillator timing resistor connection, with recommended RT of 2kΩ to 150kΩ. |
| 10 | CT | passive | Oscillator timing capacitor connection (recommended 1nF to 20µF) that carries the sawtooth waveform and is tied together across devices for synchronization. |
| 11 | RD | passive | Deadtime setting resistor connection to ground, where a larger value adds dead time (400ns/Ω at 40kHz) and 0Ω gives minimum dead time. |
| 12 | Sync | bidirectional | Active-LOW TTL/CMOS-compatible digital port that initiates an oscillator discharge cycle when driven LOW and provides the logic clock for synchronizing multiple devices. |
| 13 | Output A | output | Totem-pole output driver A that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency. |
| 14 | VC | power_in | Collector supply voltage for the output drivers, recommended +4.5V to +35V (absolute maximum +40V). |
| 15 | Ground | power_in | Ground connection for the device. |
| 16 | Output B | output | Totem-pole output driver B that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency. |
| 17 | +VIN | power_in | Input supply voltage, recommended +8V to +35V (absolute maximum +40V). |
| 18 | VREF | power_out | Temperature-compensated 5.0V reference output providing 0 to 20mA of load current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-18-300mil |
| Category | Power Supply Chip |
| Pins | 18 |
CAD (KiCad official)
- Symbol:
UC3526DWTR - Footprint:
Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm - 3D model: SOIC-18-300mil (KiCad packages3D, STEP)
- 3D model files:
uc3526dwtr-etched.step/uc3526dwtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3526dwtr.step/uc3526dwtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (11 pp, sha256
610c26f9ef74514c, retrieved 2026-10-08, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).