# LTC4366HTS8-2#TRPBF

**Analog Devices** · Pre-ordered Chips · TSOT-23-8

LTC4366HTS8-2#TRPBF from Analog Devices, in a TSOT-23-8. 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 | VDD | power_in | Start-up supply for the 7.5µA current source that charges the external MOSFET gate, clamped at 12V above VSS, and must not be bypassed with a capacitor. |
| 2 | SD | input | Shutdown comparator input with a threshold 1.5V below VDD and 280mV hysteresis that must stay below threshold for 700µs to enter shutdown; tie to VDD if unused. |
| 3 | TIMER | input | Timer input where a capacitor from this pin to VSS sets an overvoltage regulation duration of 311ms/µF before the switch turns off, with the pin left open for a 1µs regulation period before fault-off. |
| 4 | VSS | power_in | Device return and substrate; the capacitors on the TIMER and OUT pins should be returned to this pin. |
| 5 | BASE | output | Base driver output for an external PNP shunt regulator, connected internally to the anode of a 6.2V Zener with cathode tied to OUT; tie to VSS if unused. |
| 6 | FB | input | Overvoltage regulation amplifier feedback input, connected to an external resistive divider from OUT to ground, which regulates FB at 1.23V below OUT. |
| 7 | OUT | power_in | Charge pump and overvoltage regulation amplifier supply input, clamped at 5.7V and requiring a bypass of 0.22µF or greater to VSS. |
| 8 | GATE | output | Gate drive for the external N-channel MOSFET, charged to 12V above OUT by the charge pump and pulled down by a 200mA current source to OUT during a fast overvoltage event. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | TSOT-23-8 |
| Category | Interface ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD Shunt Regulator Voltage | VZ(VDD) | 11 | 11.7 | 12.5 | V | I = 1mA; full operating temperature range | 4 |
| VDD Shunt Regulator Load Regulation | ΔVZ(VDD) | 60 |  | 130 | mV | I = 1mA to 5mA; full operating temperature range | 4 |
| VDD Supply Voltage | VDD | 4.5 |  |  | V | Note 3; full operating temperature range; upper limit printed as VZ(VDD) | 4 |
| VDD Pin Current, Start-Up, Gate Low | IVDD(STLO) | 15 |  | 23 | µA | GATE = 0V, VDD = 7V, OUT = 0V; full operating temperature range | 4 |
| VDD Pin Current, Start-Up, Gate High | IVDD(STHI) | 8 |  | 13 | µA | GATE Open, VDD = 7V, OUT = 0V; full operating temperature range | 4 |
| VDD Pin Current, Shutdown | IVDD(SD) | 5 |  | 8 | µA | VDD = 7V, OUT = 0V; full operating temperature range | 4 |
| OUT Shunt Regulator Voltage | VZ(OUT) | 5 | 5.5 | 6 | V | I = 1mA, BASE = 0V; full operating temperature range | 4 |
| OUT Shunt Regulator Load Regulation | ΔVZ(OUT) | 30 |  | 70 | mV | I = 1mA to 5mA; full operating temperature range | 4 |
| OUT Supply Voltage | OUT | 3 |  |  | V | Note 3; full operating temperature range; upper limit printed as VZ(OUT) | 4 |
| OUT Undervoltage Lockout 1 Rising | VUVLO1 | 2.42 | 2.6 | 2.8 | V | Rising; full operating temperature range | 4 |
| OUT Undervoltage Lockout 1 Hysteresis | ΔVUVH1 | 0.2 | 0.28 | 0.4 | V | full operating temperature range | 4 |
| OUT Undervoltage Lockout 2 Rising | VUVLO2 | 4.5 | 4.75 | 4.9 | V | Rising; full operating temperature range | 4 |
| OUT Undervoltage Lockout 2 Hysteresis | ΔVUVH2 | 0.3 | 0.4 | 0.5 | V | full operating temperature range | 4 |
| OUT Pin Current, Regulation Amplifier On | IOUT(AMP) | 37 |  | 54 | µA | full operating temperature range | 4 |
| OUT Pin Current, Charge Pump On | IOUT(CP) | 150 |  | 220 | µA | full operating temperature range | 4 |
| OUT Pin Current, Shutdown | IOUT(SD) | 3 |  | 6 | µA | full operating temperature range | 4 |
| BASE Shunt Regulator Voltage (OUT, BASE) | VZ(BASE) | 5.5 | 6.1 | 6.6 | V | I = -10µA, OUT = 4.5V; full operating temperature range | 4 |
| BASE Shunt Regulator Load Regulation | ΔVZ(BASE) | 125 |  | 200 | mV | I = -10µA to -80µA, OUT = 4.5V; full operating temperature range | 4 |
| BASE Pin Leakage Current | IBASE | -0.1 | -0.8 | -5.5 | µA | OUT = 4.5V, BASE = -0.5V; full operating temperature range | 4 |
| VSS Pin Current, Regulation Amplifier On | IVSS(AMP) | -30 | -45 | -72 | µA | full operating temperature range | 4 |
| VSS Pin Current, Charge Pump On | IVSS(CP) | -108 | -160 | -230 | µA | full operating temperature range | 4 |
| VSS Pin Current, Shutdown | IVSS(SD) | -12 |  | -7 | µA | full operating temperature range | 4 |
| External N-Channel Gate Drive (GATE, OUT) | ΔVGATE | 11.2 | 11.75 | 12.5 | V | OUT = 4.9V, I = 0, -1µA; full operating temperature range | 4 |
| GATE Pin Current, Start-Up (LTC4366C/I/H) | IGATE(ST) | -4.5 | -7.5 | -11 | µA | GATE = OUT = 0V; LTC4366C/I/H; full operating temperature range | 4 |
| GATE Pin Current, Charge Pump On | IGATE(CP) | -14 | -20 | -28 | µA | GATE = 5V, OUT = 4.9V; full operating temperature range | 4 |
| GATE Pin Current, Fast Discharge | IGATE(FD) | 122 | 200 | 300 | mA | GATE = 10V, OUT = 4.9V; full operating temperature range | 4 |
| GATE Pin Current, Fault | IGATE(FLT) | 0.25 | 0.7 | 1.25 | mA | GATE = 10V, OUT = 4.9V; full operating temperature range | 4 |
| FB pin Regulation Threshold (OUT, FB) | VFB(REG) | 1.193 | 1.23 | 1.267 | V |  | 5 |
| FB Pin Leakage Current | IFB | -1 | 0 | 1 | µA | OUT, FB = 1.2V; full operating temperature range; printed as 0 ±1 | 5 |
| SD Pin Threshold Voltage (VDD, SD) Falling | VSD(TH) | 1 | 1.5 | 2.3 | V | Falling; full operating temperature range | 5 |
| SD Pin Hysteresis | VSD(HYST) | 129 | 260 | 530 | mV | full operating temperature range | 5 |
| SD Pin Input Pull-Up Current | ISD | -0.5 | -1.6 | -3.5 | µA | VDD, SD = 0.7V; full operating temperature range | 5 |
| TIMER Pin Threshold | VTIMER(H) | 2.5 | 2.7 | 3.1 | V | TIMER Rising, VDD = 7V, OUT = VZ(OUT); full operating temperature range | 5 |
| TIMER Pin Pull-Up Current (LTC4366C/I/H) | ITIMER(UP) | -5.1 | -9 | -13 | µA | TIMER = 1V; LTC4366C/I/H; full operating temperature range | 5 |
| TIMER Pin Pull-Down Current | ITIMER(DN) | 0.7 | 1.8 | 2.8 | µA | TIMER = 1V; full operating temperature range | 5 |
| TIMER Pin Current Ratio | ITIMER(RATIO) | 15 | 20 | 25 | % | ITIMER(DN)/ITIMER(UP); full operating temperature range | 5 |
| SD Low to Gate Low Filter Time Step | tDLY, SD | 420 | 700 | 1200 | µs | VDD, SD from 0V to 3V; full operating temperature range | 5 |
| FB Low to Gate Low Delay Time Step | tDLY, FAST | 60 | 150 | 300 | ns | OUT, FB from 0V to 1.3V; full operating temperature range | 5 |
| Supply Voltage VDD (absolute maximum) | VDD | -0.3 |  | 10 | V | All voltages relative to VSS | 2 |
| Supply Voltage OUT (absolute maximum) | OUT | -0.3 |  | 5 | V | All voltages relative to VSS | 2 |
| FB Input Voltage (absolute maximum) | FB | -0.3 |  |  | V | Upper limit printed as OUT + 0.3V | 2 |
| TIMER Input Voltage (absolute maximum) | TIMER | -0.3 |  | 3.5 | V | All voltages relative to VSS | 2 |
| SD Input Voltage (absolute maximum) | SD | -0.3 |  | 10 | V | All voltages relative to VSS | 2 |
| BASE Output Voltage (absolute maximum) | BASE | -1.5 |  | 4 | V | All voltages relative to VSS | 2 |
| OUT, BASE Output Voltage (absolute maximum) | OUT, BASE | -0.3 |  | 5.5 | V |  | 2 |
| GATE Output Voltage (absolute maximum) | GATE | -0.3 |  | 15 | V | Note 3; All voltages relative to VSS | 2 |
| GATE, OUT Output Voltage (absolute maximum) | GATE, OUT | -0.3 |  | 10 | V | Note 3 | 2 |
| VDD Pin Current (absolute maximum) | IVDD |  |  | 10 | mA |  | 2 |
| OUT Pin Current (absolute maximum) | IOUT |  |  | 10 | mA |  | 2 |
| BASE Pin Current (absolute maximum) | IBASE | -300 |  | 10 | µA |  | 2 |
| Operating Ambient Temperature Range (LTC4366H) | TA | -40 |  | 125 | °C | LTC4366H grade | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Lead Temperature (Soldering, 10 sec) |  |  |  | 300 | °C | TSOT-23 Package Only | 2 |
| Maximum Junction Temperature | TJMAX |  |  | 150 | °C |  | 2 |
| Thermal Resistance Junction-to-Ambient (TSOT-23) | θJA |  | 195 |  | °C/W | TS8 package | 2 |

## CAD (KiCad official)

- Symbol: `LTC4366HTS8-2#TRPBF`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-8`
- 3D model: TSOT-23-8 (KiCad packages3D, STEP)
- 3D model files: `ltc4366hts8-2-trpbf-etched.step` / `ltc4366hts8-2-trpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ltc4366hts8-2-trpbf.step` / `ltc4366hts8-2-trpbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/436612fe.pdf) (24 pp, sha256 `e55569b484d5e348`, retrieved 2026-10-30, tier: manufacturer)
- **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](docs/ltc4366hts8-2-trpbf-datasheet.pdf)