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LTC3803IS6#TRMPBF
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Analog Devices AC-DC Controllers And Regulators, TSOT-23-6. 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
markdownLTC3803IS6#TRMPBF
Analog Devices · AC-DC Controllers And Regulators · TSOT-23-6
LTC3803IS6#TRMPBF from Analog Devices, in a TSOT-23-6. 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 | ITH/RUN | passive | Serves as the error amplifier compensation point and run/shutdown input, with a nominal voltage range of 0.7V to 1.9V; forcing it below the shutdown threshold (VITHSHDN, nominally 0.28V) shuts the LTC3803 down and holds NGATE low. |
| 2 | GND | power_in | Ground pin, to which VCC must be closely decoupled. |
| 3 | VFB | input | Receives the feedback voltage from an external resistive divider across the output, regulated to the internal 800mV reference. |
| 4 | SENSE | input | Monitors switch current through an external current sense resistor to ground and injects a 5μA peak slope-compensation ramp through an optional programming resistor. |
| 5 | VCC | power_in | Supply pin that must be closely decoupled to GND; the UVLO turns on nominally at 8.7V and off at 5.7V, and the internal shunt clamp regulates it to about 9.5V with up to 25mA sink current. |
| 6 | NGATE | output | Gate drive for the external N-channel MOSFET, swinging from 0V to VCC, with a 1A peak output current limit for under 10μs. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | TSOT-23-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| VCC to GND (low impedance source) | -0.3 | 8 | V | 2 | |||
| VCC current fed | 25 | mA | Current fed into VCC | 2 | |||
| NGATE voltage | -0.3 | V | Maximum is VCC (printed as VCC, not a number) | 2 | |||
| VFB, ITH/RUN voltages | -0.3 | 3.5 | V | 2 | |||
| SENSE voltage | -0.3 | 1 | V | 2 | |||
| NGATE peak output current | 1 | A | <10μs | 2 | |||
| Operating junction temperature range (LTC3803I) | -40 | 125 | °C | LTC3803I | 2 | ||
| Storage temperature range | -65 | 150 | °C | 2 | |||
| Lead temperature (soldering, 10 sec) | 300 | °C | 10 sec soldering | 2 | |||
| VCC Turn On Voltage | VTURNON | 7.7 | 8.7 | 9.25 | V | LTC3803H, LTC3803I; l = full operating junction temperature range | 2 |
| VCC Turn Off Voltage | VTURNOFF | 4 | 5.7 | 6.8 | V | LTC3803H, LTC3803I; l = full operating junction temperature range | 2 |
| VCC Hysteresis | VHYST | 1.5 | 3 | V | VTURNON, VTURNOFF; LTC3803E, LTC3803I, LTC3803H; l = full operating junction temperature range | 2 | |
| VCC Shunt Regulator Voltage at 1mA | VCLAMP1mA | 8.3 | 9.4 | 10.5 | V | ICC = 1mA, VITH/RUN = 0V; LTC3803H, LTC3803I; l = full operating junction temperature range | 3 |
| VCC Shunt Regulator Voltage at 25mA | VCLAMP25mA | 8.4 | 9.5 | 10.7 | V | ICC = 25mA, VITH/RUN = 0V; LTC3803H, LTC3803I; l = full operating junction temperature range | 3 |
| VMARGIN VCLAMP1mA, VTURNON Margin | VMARGIN | 0.03 | 0.6 | V | LTC3803H, LTC3803I; l = full operating junction temperature range | 3 | |
| Input DC Supply Current in Normal Operation | ICC | 240 | 350 | μA | VITH/RUN = 1.3V (Note 4) | 3 | |
| Input DC Supply Current in Undervoltage | ICC(UV) | 40 | 110 | μA | VCC = VTURNON, 100mV; LTC3803H, LTC3803I, LTC3803MP; l = full operating junction temperature range | 3 | |
| Shutdown Threshold (at ITH/RUN) | VITHSHDN | 0.09 | 0.28 | 0.46 | V | VCC > VTURNON, VITH/RUN Falling; LTC3803H, LTC3803I, LTC3803MP; l = full operating junction temperature range | 3 |
| Start-Up Current Source | IITHSTART | 0.2 | 0.3 | 0.4 | μA | VITH/RUN = 0V | 3 |
| Regulated Feedback Voltage (LTC3803I, 0°C to 85°C) | VFB | 0.788 | 0.8 | 0.812 | V | LTC3803I: 0°C ≤ TJ ≤ 85°C (Note 5) | 3 |
| Regulated Feedback Voltage (LTC3803I, -40°C to 125°C) | VFB | 0.78 | 0.8 | 0.82 | V | LTC3803I: -40°C ≤ TJ ≤ 125°C (Note 5) | 3 |
| Error Amplifier Transconductance | gm | 200 | 333 | 500 | μA/V | ITH/RUN Pin Load = ±5μA (Note 5) | 3 |
| Output Voltage Line Regulation | ΔVO(LINE) | 0.05 | mV/V | Note 5; single printed value, column assumed to be max | 3 | ||
| Output Voltage Load Regulation (ITH/RUN sinking) | ΔVO(LOAD) | 3 | mV/μA | ITH/RUN sinking 5μA (Note 5); single printed value, column assumed to be max | 3 | ||
| Output Voltage Load Regulation (ITH/RUN sourcing) | ΔVO(LOAD) | 3 | mV/μA | ITH/RUN sourcing 5μA (Note 5); single printed value, column assumed to be max | 3 | ||
| VFB Input Current | IFB | 10 | 50 | nA | Note 5 | 3 | |
| Oscillator Frequency | fOSC | 180 | 200 | 240 | kHz | VITH/RUN = 1.3V | 3 |
| Minimum Switch On Duty Cycle | DCON(MIN) | 6 | 8 | % | VITH/RUN = 1.3V, VFB = 0.8V | 3 | |
| Maximum Switch On Duty Cycle | DCON(MAX) | 70 | 80 | 90 | % | VITH/RUN = 1.3V, VFB = 0.8V | 3 |
| Peak Current Sense Voltage | VIMAX | 90 | 100 | 120 | mV | RSL = 0 (Note 6); LTC3803H, LTC3803I; l = full operating junction temperature range | 3 |
| Gate Drive Rise Time | tRISE | 40 | ns | CLOAD = 3000pF; single printed value, column assumed to be typ | 3 | ||
| Gate Drive Fall Time | tFALL | 40 | ns | CLOAD = 3000pF (Note 7); single printed value, column assumed to be typ | 3 | ||
| Peak Slope Compensation Output Current | ISLMAX | 5 | μA | Note 7; single printed value, column assumed to be typ | 3 | ||
| Soft-Start Time | tSFST | 1.4 | ms | single printed value, column assumed to be typ | 3 | ||
| Thermal resistance junction-to-ambient (TSOT-23 S6) | θJA | 192 | °C/W | 6-lead TSOT-23 S6 package | 2 | ||
| Maximum junction temperature | TJMAX | 150 | °C | 2 |
CAD (KiCad official)
- Symbol:
LTC3803IS6#TRMPBF - Footprint:
Package_TO_SOT_SMD:TSOT-23-6 - 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
ltc3803is6-trmpbf-etched.step/ltc3803is6-trmpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ltc3803is6-trmpbf.step/ltc3803is6-trmpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (16 pp, sha256
d1656d1fcad77872, retrieved 2026-10-19, 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).