# HT1584AREZ

**HTCSEMI** · DC-DC Converters · ESOP-8

HT1584AREZ from HTCSEMI, in a ESOP-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 | SW | output | Switch node, the output of the high-side switch; a low forward drop Schottky diode to ground is required close to the SW pins to reduce switching spikes. |
| 2 | EN | input | Enable input: pulling it below the specified threshold (falling threshold 1.2V, rising threshold 1.5V) shuts the chip down, while pulling it above the threshold or leaving it floating enables the chip. |
| 3 | COMP | passive | Compensation node and output of the error amplifier where control loop frequency compensation is applied; COMP is clamped to 0.9V to 2.0V in operation and should not be pulled above 2.6V. |
| 4 | FB | input | Feedback input to the error amplifier; the output voltage is set by a resistive divider from VOUT to GND, scaled to the internal 0.8V reference. |
| 5 | GND | power_in | Ground, to be connected as close as possible to the output capacitor; the exposed pad must be connected to the GND plane for optimal thermal performance. |
| 6 | FREQ | input | Switching frequency program input: a resistor from this pin to ground sets the oscillator frequency, programmable from 100kHz to 1.5MHz. |
| 7 | VIN | power_in | Input supply for the internal control circuitry, both bootstrap regulators and the high-side switch, with a decoupling capacitor to ground placed close to this pin; operating input range is 4.5V to 28V. |
| 8 | BST | power_out | Bootstrap pin, the positive supply for the internal floating high-side MOSFET driver; a bypass capacitor is connected between this pin and SW. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## 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 Voltage | VFB | 0.776 | 0.8 | 0.824 | V | 4.5V < VIN < 28V | 3 |
| Current Limit |  | 4 |  | 4.7 | A |  | 3 |
| Error Amp Transconductance |  | 40 | 60 | 80 | µA/V | ICOMP = ±3µA | 3 |
| VIN UVLO Threshold |  | 2.7 | 3 | 3.3 | V |  | 3 |
| EN Up Threshold |  | 1.35 | 1.5 | 1.65 | V |  | 3 |
| Shutdown Supply Current |  |  | 12 | 20 | µA | VEN = 0V | 3 |
| Quiescent Supply Current |  |  | 100 | 125 | µA | No load, VFB = 0.9V | 3 |
| Upper Switch On Resistance | RDS(ON) |  | 150 |  | mΩ | VBST, VSW = 5V | 3 |
| Upper Switch Leakage Current |  |  | 1 |  | µA | VEN = 0V, VSW = 0V, VIN = 28V | 3 |
| COMP to Current Sense Transconductance | GCS |  | 9 |  | A/V |  | 3 |
| Error Amp Voltage Gain |  |  | 200 |  | V/V |  | 3 |
| Error Amp Min Source Current |  |  | 5 |  | µA | VFB = 0.7V | 3 |
| Error Amp Min Sink Current |  |  | -5 |  | µA | VFB = 0.9V | 3 |
| VIN UVLO Hysteresis |  |  | 0.35 |  | V |  | 3 |
| Soft-Start Time |  |  | 1.5 |  | ms | 0V < VFB < 0.8V | 3 |
| Oscillator Frequency |  |  | 900 |  | kHz | RFREQ = 100kΩ | 3 |
| Thermal Shutdown |  |  | 150 |  | C |  | 3 |
| Thermal Shutdown Hysteresis |  |  | 15 |  | C |  | 3 |
| Minimum Off Time |  |  | 100 |  | ns |  | 3 |
| Minimum On Time |  |  | 100 |  | ns |  | 3 |
| EN Hysteresis |  |  | 300 |  | mV |  | 3 |
| Supply Voltage | VIN | 4.5 |  | 28 | V |  | 2 |
| Output Voltage | VOUT | 0.8 |  | 25 | V |  | 2 |
| Operating Junction Temperature | TJ | -20 |  | 125 | C |  | 2 |
| Supply Voltage | VIN | -0.3 |  | 30 | V |  | 2 |
| Switch Voltage | VSW | -0.3 |  |  | V | max printed as VIN + 0.3V | 2 |
| BST to SW Voltage |  | -0.3 |  | 6 | V |  | 2 |
| All Other Pins Voltage |  | -0.3 |  | 6 | V |  | 2 |
| Continuous Power Dissipation | PD |  |  | 2.5 | W | TA = +25°C | 2 |
| Junction Temperature |  |  |  | 150 | C |  | 2 |
| Lead Temperature |  |  |  | 260 | C |  | 2 |
| Storage Temperature |  | -65 |  | 150 | C |  | 2 |
| Thermal Resistance Junction-to-Ambient (SOIC8E) | θJA |  | 50 |  | C/W | Measured on JESD51-7, 4-layer PCB | 2 |
| Thermal Resistance Junction-to-Case (SOIC8E) | θJC |  | 10 |  | C/W |  | 2 |

## CAD (KiCad official)

- Symbol: `HT1584AREZ`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `ht1584arez-etched.step` / `ht1584arez-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht1584arez.step` / `ht1584arez.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTCSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836750526328832) (17 pp, sha256 `04e48af99dc0f468`, retrieved 2026-10-17, tier: lcsc)
- **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/ht1584arez-datasheet.pdf)