component
ht2459artz
Public Unreviewedby Ray
HTCSEMI DC-DC Converters, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownHT2459ARTZ
HTCSEMI · DC-DC Converters · SOT-23-6
HT2459ARTZ from HTCSEMI, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BST | passive | Bootstrap. Connect a capacitor (0.1µF-1µF) between SW and BST to form a floating supply across the power switch driver, driving the high-side MOSFET gate above the supply voltage. An optional external BST diode (e.g. 1N4148) from VOUT to BST enhances efficiency at high duty cycles. |
| 2 | GND | power_in | Ground. Voltage reference for the regulated output voltage. Requires special layout considerations - isolate this node from the D1-to-C1 ground path to prevent switching current spikes from being induced into the analog ground. |
| 3 | FB | input | Feedback. Sets the output voltage via an external resistor divider from VOUT to GND, regulated to the internal 0.812V (typ) bandgap reference. The frequency foldback comparator lowers the oscillator frequency (to ~150kHz) when FB is below 250mV to prevent current-limit runaway during a short-circuit fault. |
| 4 | EN | input | Enable (On/Off). Pull EN above 1.35V (typ rising threshold) to turn the device ON; falling threshold is 1.17V (typ) with 180mV hysteresis. For automatic enable, connect to VIN through a 100kΩ resistor. Input current is ~3.1µA at VEN=2V. |
| 5 | IN | power_in | Supply Voltage input. The HT2459 operates from a 4.5V-to-60V unregulated input. Requires an input ceramic capacitor (typ 4.7µF, X5R/X7R) close to the pin to prevent large voltage spikes from appearing at the input. |
| 6 | SW | output | Switch Output. Drain of the internal high-side power MOSFET (RDS(ON) ≈ 0.5Ω typ). Connect to the external inductor and Schottky rectifier diode. Absolute rating: -0.3V to VIN+0.3V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-23-6 |
| Category | PMIC |
| Pins | 6 |
Ordering variants
HT2459ARTZ
CAD (KiCad official)
- Symbol:
HT2459ARTZ - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (None pp, sha256
5f549c187d335dea, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).