component
GBI1633SMAR
Public Made by Adomby adom
GOSEMICON DC-DC Converters, ESOP-8. 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
markdownGBI1633SMAR
GOSEMICON · DC-DC Converters · ESOP-8
GBI1633SMAR from GOSEMICON, 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 | BOOT | input | Power supply for the high-side power MOSFET gate driver; must connect a 0.1uF or greater ceramic capacitor between the BOOT and SW pins. |
| 2 | VIN | power_in | Power supply input for the device (4.5V to 60V operating range), which must be locally bypassed. |
| 3 | EN | input | Enable logic input that supports voltages up to the VIN supply, with precision thresholds of 1.21V rising and 1.05V falling; floating the pin enables the device. |
| 4 | RT | input | Resistor timing pin that sets the switching frequency through a resistor to GND, and must not be left floating or shorted to GND. |
| 5 | FB | input | Buck converter feedback sense input; a resistor divider from VOUT to FB and from FB to GND sets the output, regulating FB to the internal 0.75V reference. |
| 6 | SS | input | Soft-start time pin; a capacitor to GND sets the soft-start time, and the pin may be left floating for a default soft-start time of about 5ms. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | SW | output | Switching node of the buck converter, rated up to 65V (SW to GND) per the absolute maximum ratings. |
| 9 | Thermal Pad | power_in | Exposed thermal pad that must be grounded in the PCB layout. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | GOSEMICON |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage VIN, EN to GND | -0.3 | 65 | V | 3 | |||
| FB to GND | -0.3 | 6.5 | V | 3 | |||
| SS to GND | -0.3 | 6.5 | V | 3 | |||
| RT to GND | -0.3 | 6.5 | V | 3 | |||
| SW to GND | -0.6 | 65 | V | 3 | |||
| SW to GND (20ns transient) | -3 | 65 | V | 20ns transient | 3 | ||
| BOOT to SW | 6.5 | V | 3 | ||||
| Junction temperature | TJ | -40 | 150 | °C | 3 | ||
| Storage temperature | TSTG | -65 | 150 | °C | 3 | ||
| VIN Supply voltage range | VIN | 4.5 | 60 | V | 3 | ||
| BOOT to SW | 0 | 6 | V | 3 | |||
| FB, EN, PG | 0 | 6 | V | 3 | |||
| EN | EN | 0 | 60 | V | 3 | ||
| Switching frequency range at RT mode | fSW | 200 | 2000 | kHz | 3 | ||
| Operating junction temperature | TJ | -40 | 125 | °C | 3 | ||
| Junction to ambient thermal resistance (eSOP-8L) | RθJA | 42.5 | °C/W | 4 | |||
| Junction to case thermal resistance (eSOP-8L) | RθJC | 56.1 | °C/W | 4 | |||
| Junction to board characterization parameter (eSOP-8L) | ψJB | 25.4 | °C/W | 4 | |||
| Junction to top characterization parameter (eSOP-8L) | ψJT | 10 | °C/W | 4 | |||
| Operating input voltage | VIN | 4.5 | 60 | V | 4 | ||
| Input UVLO (VIN rising) | VIN_UVLO | 4.2 | 4.4 | V | VIN rising | 4 | |
| Input UVLO hysteresis | 350 | mV | 4 | ||||
| Shutdown current | ISHDN | 1 | uA | EN=0, No load, 4.5V≤VIN≤60V | 4 | ||
| Quiescent current | IQ | 100 | uA | EN=floating, No load, No switch, 4.5V≤VIN≤60V, BOOT-SW=5V | 4 | ||
| Enable high threshold | VEN_H | 1.17 | 1.21 | 1.25 | V | 4 | |
| Enable low threshold | VEN_L | 1.05 | V | 4 | |||
| Feedback voltage | VFB | 0.742 | 0.75 | 0.758 | V | 4 | |
| High side FET on-resistance | RDSON_H | 100 | 150 | 235 | mΩ | 4 | |
| Switching frequency | fSW | 410 | 470 | 520 | KHz | RT=50k | 4 |
| Maximum switching frequency | 2 | MHz | 4 | ||||
| Minimum on-time | tON_MIN | 100 | ns | 4 | |||
| Maximum duty cycle | DMAX | 95 | % | fSW=500kHz | 4 | ||
| Internal soft-start time | tSS | 1.8 | 5 | 7.8 | ms | SS pin floating | 4 |
| Soft start current | ISS | 4 | uA | 4 | |||
| HSD peak current limit | ILIM_HSD | 4.45 | 4.75 | 5.05 | A | VIN=24V | 5 |
| Thermal shutdown threshold | TSD | 170 | °C | 5 | |||
| Thermal shutdown hysteresis | 30 | °C | 5 | ||||
| Output over voltage protection rising | VOVP_H | 108 | % | 5 | |||
| Output over voltage protection falling | VOVP_L | 103 | % | 5 | |||
| Output under voltage protection falling | VUVP_L | 92 | % | 5 | |||
| Output under voltage protection rising | VUVP_H | 97 | % | 5 |
CAD (KiCad official)
- Symbol:
GBI1633SMAR - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
gbi1633smar-etched.step/gbi1633smar-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);gbi1633smar.step/gbi1633smar.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: GOSEMICON datasheet (19 pp, sha256
3c112b7acfbd9ef8, 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).