component
RT7273GQW
Public Made by Adomby adom
Richtek Tech DC-DC Converters, WQFN-40(6x6). 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
markdownRT7273GQW
Richtek Tech · DC-DC Converters · WQFN-40(6x6)
RT7273GQW from Richtek Tech, in a WQFN-40(6x6). 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 | RLIM3 | passive | Channel 3 current limit adjust pin; the cycle-by-cycle current limit is set by an external resistor. |
| 2 | SS3 | passive | Channel 3 soft-start pin; an external capacitor to GND sets the soft-start time. |
| 3 | COMP3 | passive | Channel 3 compensation pin; connect a simple RC network to optimize transient versus DC accuracy. |
| 4 | FB3 | input | Channel 3 feedback input; connect to the midpoint of the resistor divider from VOUT3 (VOUT = 0.8V x (1 + Rtop/Rbottom)). |
| 5 | SYNC | input | Synchronous clock input for the oscillator; connect to GND if not used. |
| 6 | ROSC | passive | Oscillator resistor pin; an external resistor sets the switching frequency between 300kHz and 2.2MHz (383kΩ gives 500kHz). |
| 7 | FB1 | input | Channel 1 feedback input; connect to the midpoint of the resistor divider from VOUT1 (VOUT = 0.8V x (1 + Rtop/Rbottom)). |
| 8 | COMP1 | passive | Channel 1 compensation pin; connect a simple RC network to optimize transient versus DC accuracy. |
| 9 | SS1 | passive | Channel 1 soft-start pin; an external capacitor to GND sets the soft-start time. |
| 10 | RLIM1 | passive | Channel 1 current limit adjust pin; the cycle-by-cycle current limit is set by an external resistor. |
| 11 | EN1 | input | Channel 1 enable; pulled high to enable and low to disable, internally pulled high when floating. |
| 12 | BOOT1 | passive | Channel 1 bootstrap capacitor connection for the high-side switch drive, connected to LX1 through a capacitor. |
| 13 | VIN1 | power_in | Channel 1 power input, 4.5V to 18V. |
| 14 | LX1 | output | Channel 1 switch output node connected to the inductor. |
| 15 | LX1 | output | Channel 1 switch output node connected to the inductor. |
| 16 | LX2 | output | Channel 2 switch output node connected to the inductor. |
| 17 | LX2 | output | Channel 2 switch output node connected to the inductor. |
| 18 | VIN2 | power_in | Channel 2 power input, 4.5V to 18V. |
| 19 | BOOT2 | passive | Channel 2 bootstrap capacitor connection for the high-side switch drive, connected to LX2 through a capacitor. |
| 20 | EN2 | input | Channel 2 enable; pulled high to enable and low to disable, internally pulled high when floating. |
| 21 | RLIM2 | passive | Channel 2 current limit adjust pin; the cycle-by-cycle current limit is set by an external resistor. |
| 22 | SS2 | passive | Channel 2 soft-start pin; an external capacitor to GND sets the soft-start time. |
| 23 | COMP2 | passive | Channel 2 compensation pin; connect a simple RC network to optimize transient versus DC accuracy. |
| 24 | FB2 | input | Channel 2 feedback input; connect to the midpoint of the resistor divider from VOUT2 (VOUT = 0.8V x (1 + Rtop/Rbottom)). |
| 25 | LOWP | input | Active-high low-power input; discontinuous operating mode at light load when LOWP = High. |
| 26 | GND | power_in | Ground. |
| 27 | PG | output | Power good indicator output. |
| 28 | PVCC | power_out | 5V internal regulator output; connect a 10µF capacitor between this pin and GND. |
| 29 | VCC | power_out | 4.6V internal regulator output; connect a 3.3µF capacitor between this pin and GND. |
| 30 | GND | power_in | Ground. |
| 31 | GND | power_in | Ground. |
| 32 | VINR | power_in | Power supply voltage input for the internal control circuit. |
| 33 | VINR | power_in | Power supply voltage input for the internal control circuit. |
| 34 | VINR | power_in | Power supply voltage input for the internal control circuit. |
| 35 | GND | power_in | Ground. |
| 36 | LX3 | output | Channel 3 switch output node connected to the inductor. |
| 37 | LX3 | output | Channel 3 switch output node connected to the inductor. |
| 38 | VIN3 | power_in | Channel 3 power input, 4.5V to 18V. |
| 39 | BOOT3 | passive | Channel 3 bootstrap capacitor connection for the high-side switch drive, connected to LX3 through a capacitor. |
| 40 | EN3 | input | Channel 3 enable; pulled high to enable and low to disable, internally pulled high when floating. |
| 41 | GND | power_in | Exposed pad; must be soldered to a large PCB area and connected to GND for maximum power dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | WQFN-40(6x6) |
| Category | Power Supply Chip |
| Pins | 41 |
CAD (KiCad official)
- Symbol:
RT7273GQW - Footprint:
Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm - 3D model: WQFN-40(6x6) (KiCad packages3D, STEP)
- 3D model files:
rt7273gqw-etched.step/rt7273gqw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rt7273gqw.step/rt7273gqw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Richtek Tech datasheet (8 pp, sha256
1067520e81c1c8d6, retrieved 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).