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RT4722CGQW

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Richtek Tech DC-DC Converters, WQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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RT4722CGQW

Richtek Tech · DC-DC Converters · WQFN-16-EP(3x3)

RT4722CGQW from Richtek Tech, in a WQFN-16-EP(3x3). 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 LX1 passive Switching node of the 1st boost converter (VO1, fixed 4.6V).
2 PGND1 power_in Power ground.
3 VO1 power_out Output of the 1st boost converter (VPOS, typically 4.6V, up to 300mA).
4 FBS input Output feedback sense of the 1st boost converter; connect to the VO1 pin if unused.
5 FD input Enables or disables active discharge during shutdown; default floating.
6 NC unconnected No connection.
7 AGND power_in Signal ground, shared with the exposed pad (pin 17).
8 ENO3 input Enable/disable pin for the 2nd boost converter (VO3); input high threshold 1.2V min, low threshold 0.4V max.
9 SWIRE input Single-wire control pin that enables/disables VPOS and VNEG and programs the VO2 and VO3 output voltages; 150kΩ typical internal pull-down.
10 VO2 power_out Buck/boost converter output (negative voltage, programmable -1.4V to -5.4V, up to 300mA).
11 LX2 passive Switching node of the buck/boost converter.
12 PVIN power_in Power input voltage, 2.9V to 4.5V recommended operating range.
13 VO3 power_out Output of the 2nd boost converter (AVDD, 5.8V to 7.9V, up to 55mA).
14 PGND2 power_in Power ground.
15 LX3 passive Switching node of the 2nd boost converter.
16 AVIN power_in Analog input voltage, 2.9V to 4.5V recommended operating range.
17 AGND power_in Exposed pad, signal ground; solder to a large PCB ground area and connect to AGND for maximum power dissipation.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package WQFN-16-EP(3x3)
Category Power Supply Chip
Pins 17

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 Range VIN 2.9 3.7 4.5 V 7
Under Voltage Lockout High UVLO_H 2.3 2.4 2.5 V VIN rising 7
VIN Shutdown Current ISHDN 1 µA ENO3 = GND, SWIRE = GND 7
ENO3, SWIRE, FD Input High Threshold VIH 1.2 V VIN = 2.9V to 4.5V 7
ENO3, SWIRE, FD Input Low Threshold VIL 0.4 V VIN = 2.9V to 4.5V 7
ENO3 Pull Down Current IENO3 10 µA 7
Switching Frequency fSW 1.35 1.5 1.65 MHz PWM mode 7
AVDD Output Voltage Range VO3 5.8 6.1 7.9 V 42 to 49 pulses by SWIRE pin 8
AVDD Output Voltage Total Variation VO3_ACY -2 2 % No load 8
VO3 Maximum Output Current IO3MAX 55 mA VIN = 2.9V to 4.5V 8
VO3 Current Limit IOCP3 0.28 0.35 0.42 A 8
VO1 Positive Output Voltage Variation VO1 -0.5 0.5 % 8
VO1 Maximum Output Current IO1MAX 300 mA VIN = 2.9V to 4.5V 8
VO1 Current Limit IOCP1 0.8 1 1.2 A 8
Negative Output Voltage Variation VO2_ACY -50 50 mV VO2 = 2.4V, No Load 8
VO2 Maximum Output Current IO2MAX 300 mA VIN = 2.9V to 4.5V 8
VO2 Current Limit IOCP2 1.6 1.9 2.2 A 8
Adjustable Negative Output Voltage Range VO2 -5.4 -4 -1.4 V 41 different values set by SWIRE pin 8
Input SWIRE Frequency fswire 25 250 kHz 4
Signal Stop Indicate Time tstop 100 µs 4
Turn-off Detection Time toff_dly 30 80 µs 4
SWIRE Rising Time tr 200 ns 4
SWIRE Falling Time tf 200 ns 4
Clock SWIRE High tsH 2 10 20 µs 4
Clock SWIRE Low tsL 2 10 20 µs 4
Supply Input Voltage 2.9 4.5 V 7
Ambient Temperature Range TA -40 85 °C 7
Junction Temperature Range TJ -40 125 °C 7
Abs Max PVIN, AVIN, VO1, LX1, FBS, FD, ENO3, SWIRE -0.3 6 V 7
Abs Max VO3, LX3 -0.3 12 V 7
Abs Max VO2 -6 0.3 V 7
Abs Max LX2 -6 6 V 7
Power Dissipation PD 3.33 W WQFN-16L 3x3, TA = 25°C 7
Lead Temperature 260 °C Soldering, 10sec 7
Junction Temperature TJ 150 °C 7
Storage Temperature Range -65 150 °C 7
ESD Susceptibility HBM 2 kV HBM 7
Thermal Resistance Junction-to-Ambient θJA 30 °C/W WQFN-16L 3x3 7
Thermal Resistance Junction-to-Case θJC 7.5 °C/W WQFN-16L 3x3 7
Under Voltage Lockout Hysteresis UVLO_Hys 0.2 V VIN hysteresis 7
SWIRE Pull-down Resistor RSWIRE 150 kΩ 7
Over-Temperature Protection OTP 140 °C 8
Over-Temperature Protection Hysteresis OTPHYST 15 °C 8

CAD (KiCad official)

  • Symbol: RT4722CGQW
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: rt4722cgqw-etched.step / rt4722cgqw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt4722cgqw.step / rt4722cgqw.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (18 pp, sha256 fd870f9bc9147939, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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