component
HT8259ARTZ
Public Made by Adomby adom
HTCSEMI DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownHT8259ARTZ
HTCSEMI · DC-DC Converters · SOT-23-6
HT8259ARTZ from HTCSEMI, in a SOT-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 | BOOT | passive | Bootstrap pin: a capacitor (10nF low-ESR ceramic per the datasheet) connected between BOOT and PHASE forms a floating supply for the high-side power switch gate driver. |
| 2 | GND | power_in | Ground and voltage reference for the regulated output; it should be placed outside the D1-to-C1 ground path to keep switching current spikes from coupling noise into the part. |
| 3 | FB | input | Feedback input: an external resistor divider from VOUT to GND sets the output voltage against the 0.8V (0.784V to 0.816V) reference, and the divider values also set loop bandwidth. |
| 4 | EN | input | Active-high chip enable with VIH minimum 1.4V and VIL maximum 0.4V; it is pulled high internally when left open, and the absolute EN voltage range is 0V to 5.5V. |
| 5 | VIN | power_in | Supply input operating from 4.5V to 24V, to be bypassed to GND with a suitably large capacitor to prevent large voltage spikes at the input. |
| 6 | PHASE | output | Switch output (switching node) of the internal power MOSFET; the datasheet limits PHASE voltage to -0.3V to (VIN + 0.3V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-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 |
|---|---|---|---|---|---|---|---|
| Feedback Reference Voltage | VFB | 0.784 | 0.8 | 0.816 | V | 4.5V VIN 24V | 3 |
| Current Limit | ILIM | 1.6 | 2.1 | A | VBOOT - VPHASE = 4.8V | 3 | |
| Oscillator Frequency | fSW | 1.2 | 1.4 | 1.6 | MHz | 3 | |
| Under Voltage Lockout Threshold (Rising) | 3.9 | 4.2 | 4.5 | V | Rising | 3 | |
| EN Input Voltage Logic-High | VIH | 1.4 | V | 3 | |||
| EN Input Voltage Logic-Low | VIL | 0.4 | V | 3 | |||
| Feedback Current | IFB | 0.1 | 0.3 | A | VFB = 0.8V | 3 | |
| Switch Leakage Current | 10 | A | VEN = 0V, VPHASE = 0V | 3 | |||
| Quiescent Current | IQ | 0.55 | 1 | mA | VEN = 2V, VFB = 1V (Not Switching) | 4 | |
| Switch On Resistance | RDS(ON) | 0.3 | 3 | ||||
| Maximum Duty Cycle | 80 | % | 3 | ||||
| Minimum On-Time | tON | 100 | ns | 3 | |||
| Under Voltage Lockout Threshold Hysteresis | 200 | mV | 3 | ||||
| EN Pull Up Current | 1 | A | VEN = 0V | 3 | |||
| Shutdown Current | ISHDN | 25 | A | VEN = 0V | 4 | ||
| Thermal Shutdown | TSD | 150 | °C | 4 | |||
| Supply Voltage VIN | VIN | 26 | V | 3 | |||
| PHASE Voltage | -0.3 | V | 3 | ||||
| All Other Pins Voltage | -0.3 | 6 | V | 3 | |||
| Output Voltage | VOUT | -0.3 | 15 | V | 3 | ||
| Power Dissipation T/SOT-23-6 | PD | 0.4 | W | TA = 25°C | 3 | ||
| Package Thermal Resistance T/SOT-23-6 | JA | 250 | °C/W | 3 | |||
| Junction Temperature | 150 | °C | 3 | ||||
| Lead Temperature | 260 | °C | 10 sec soldering | 3 | |||
| Storage Temperature Range | -65 | 150 | °C | 3 | |||
| ESD Susceptibility HBM | 2 | kV | Human Body Model | 3 | |||
| ESD Susceptibility MM | 200 | V | Machine Model | 3 | |||
| Supply Voltage VIN (recommended) | VIN | 4.5 | 24 | V | 3 | ||
| Output Voltage VOUT (recommended) | VOUT | 0.8 | 15 | V | 3 | ||
| EN Voltage VEN (recommended) | VEN | 0 | 5.5 | V | 3 | ||
| Junction Temperature Range (recommended) | -40 | 125 | °C | 3 | |||
| Ambient Temperature Range (recommended) | -40 | 85 | °C | 3 | |||
| Thermal Resistance Junction to Ambient T/SOT-23-6 | JA | 120 | °C/W | JEDEC 51-7 four-layer test board | 10 |
CAD (KiCad official)
- Symbol:
HT8259ARTZ - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
ht8259artz-etched.step/ht8259artz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht8259artz.step/ht8259artz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (12 pp, sha256
9d07c59cfef65a4e, 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).