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RT6576DGQW

Richtek Tech · DC-DC Converters · WQFN-20-EP(3x3)

RT6576DGQW from Richtek Tech, in a WQFN-20-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	CS1	input	Channel 1 current-limit setting input: a resistor to GND sets the threshold to 1/8 of the CS1 voltage over a 0.2V to 2V range, fed by an internal 10µA source from LDO5.
2	FB1	input	Channel 1 feedback input: a resistive divider from VOUT1 to GND sets the output from 2V to 5.5V.
3	LDO3	power_out	3.3V linear regulator output that is always on when VIN is above the VINPOR threshold, rated up to 100mA.
4	FB2	input	Channel 2 feedback input: a resistive divider from VOUT2 to GND sets the output from 2V to 4V.
5	CS2	input	Channel 2 current-limit setting input: a resistor to GND sets the threshold to 1/8 of the CS2 voltage over a 0.2V to 2V range, fed by an internal 10µA source from LDO5.
6	EN2	input	Channel 2 enable input with 1.6V minimum logic-high and 0.4V maximum logic-low thresholds.
7	PGOOD	output	Open-drain power-good output for Channel 1 and Channel 2 (logical AND) that requires a pull-up resistor and is released when both outputs are above 88% of nominal.
8	PHASE2	passive	Channel 2 switch node that serves as the internal lower supply rail for the UGATE2 driver and as the Channel 2 current-sense input.
9	BOOT2	power_out	Bootstrap supply for the Channel 2 high-side gate driver, connected to an external capacitor per the typical application circuit.
10	UGATE2	output	Channel 2 high-side gate driver output that swings between PHASE2 and BOOT2.
11	LGATE2	output	Channel 2 low-side gate driver output that swings between GND and LDO5.
12	VIN	power_in	Power input for the 5V and 3.3V LDO regulators and buck controllers, with a 5V to 25V recommended operating range and 30V absolute maximum.
13	LDO5	power_out	5V linear regulator output that also supplies the low-side MOSFET gate drivers and the analog circuitry, rated up to 100mA.
14	BYP1	power_in	Switch-over source input for LDO5 that connects to the Channel 1 output, bypassing LDO5 once VOUT1 exceeds the 4.66V threshold.
15	LGATE1	output	Channel 1 low-side gate driver output that swings between GND and LDO5.
16	UGATE1	output	Channel 1 high-side gate driver output that swings between PHASE1 and BOOT1.
17	BOOT1	power_out	Bootstrap supply for the Channel 1 high-side gate driver, connected to an external capacitor per the typical application circuit.
18	PHASE1	passive	Channel 1 switch node that serves as the internal lower supply rail for the UGATE1 driver and as the Channel 1 current-sense input.
19	VCLK	output	Oscillator output for an external charge pump, operating at a typical 260kHz and driven from BYP1.
20	EN1	input	Channel 1 enable input with 1.6V minimum logic-high and 0.4V maximum logic-low thresholds.
21	GND	power_in	Ground exposed pad that must be soldered to a large PCB and connected to GND for maximum power dissipation.

Key specifications

Parameter	Value
Manufacturer	Richtek Tech
Package	WQFN-20-EP(3x3)
Category	Power Management (PMIC)
Pins	21

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
VIN Power-On Reset Rising Threshold	VINPOR		4.6	4.9	V		7
VIN Power-On Reset Falling Threshold	VINPOR	3.2	3.7		V		7
VIN Standby Supply Current (RT6576D)	IVIN_SBY		80	100	µA	Both Buck Controllers Off, VEN1 = VEN2 = GND	7
VIN Quiescent Current	IVIN_nosw		15	25	µA	Both Buck Controllers On, VFBx = 2.05V, VBYP1 = 5.05V	7
BYP1 Supply Current	IBYP1_nosw		420	500	µA	Both Buck Controllers On, VFBx = 2.05V, VBYP1 = 5.05V	7
FBx Valley Trip Voltage	VFBx	1.98	2	2.02	V	CCM Operation	7
BYP1 Discharge Current	IDCHG_BYP1	10	45		mA	VBYP1 = 0.5V	7
PHASEx Discharge Current	IDCHG_LX	5	8		mA	VPHASEx = 0.5V	7
Switching Frequency CH1	fSWx	240	300	360	kHz	VIN = 20V, VOUT1 = 5V	7
Switching Frequency CH2	fSWx	280	355	430	kHz	VIN = 20V, VOUT2 = 3.33V	7
Minimum Off-Time	tOFF(MIN)		200	275	ns	VFBx = 1.9V	7
Soft-Start Time	tSSx	2		4.5	ms	VOUTx Ramp-up Time	7
CSx Source Current	ICSx	9	10	11	µA	VCSx = 1V, VFBx = 1.9V	7
LDO5 Output Voltage	VLDO5	4.9	5	5.1	V	VIN = 12V, No Load	7
LDO5 Output Voltage	VLDO5	4.8	5	5.1	V	VIN > 7V, ILDO5 < 100mA	7
LDO5 Output Voltage	VLDO5	4.5	4.75	5.1	V	VIN > 5V, ILDO5 < 20mA	7
LDO3 Output Voltage	VLDO3	3.267	3.3	3.333	V	VIN = 12V, No Load	7
LDO3 Output Voltage	VLDO3	3.217	3.3	3.383	V	VIN > 7V, ILDO3 < 100mA	7
LDO5 Output Current	ILDO5	100	175		mA	VLDO5 = 4.5V, VBYP1 = GND, VIN = 7.4V	8
LDO3 Output Current	ILDO3	100	175		mA	VLDO3 = 3V, VIN = 7.4V	8
LDO5 Switch-over Equivalent Resistance	RSW		1.5	3	Ω	LDO5 to BYP1, 10mA	8
LDO5 UVLO Threshold Rising Edge	VUVLO5		4.3	4.6	V	Rising Edge	8
LDO5 UVLO Threshold Falling Edge	VUVLO5	3.7	3.9	4.1	V	Falling Edge	8
PGOOD Threshold	VPGxTH	84	88	92	%	PGOOD Detect, VFBx Rising Edge	8
PGOOD Leakage Current				1	µA	High state, VPGOOD = 5.5V	8
PGOOD Output Low Voltage				0.3	V	ISINK = 4mA	8
OVP Trip Threshold	VOVP	109	113	117	%	FBx with Respect to Internal Reference	8
UVP Trip Threshold	VUVP	47	52	57	%	UVP Detect, FBx Falling Edge	8
ENx Threshold Voltage Logic-High	VENx_H	1.6			V	SMPS On	8
ENx Threshold Voltage Logic-Low	VENx_L			0.4	V	SMPS Off	8
VIN to GND		-0.3		30	V		6
BOOTx to GND		-0.3		36	V	DC	6
BOOTx to GND		-5		42	V	<100ns	6
BOOTx to PHASEx		-0.3		6	V	DC	6
BOOTx to PHASEx		-5		7.5	V	<100ns	6
PHASEx to GND		-5		30	V	DC	6
PHASEx to GND		-10		42	V	<100ns	6
UGATEx to GND		-5		36	V	DC	6
UGATEx to GND		-10		42	V	<100ns	6
UGATEx to PHASEx		-0.3		6	V	DC	6
UGATEx to PHASEx		-5		7.5	V	<100ns	6
LGATEx to GND		-0.3		6	V	DC	6
LGATEx to GND		-5		7.5	V	<100ns	6
Other Pins		-0.3		6.5	V		6
Power Dissipation	PD			3.33	W	TA = 25°C, WQFN-20L 3x3	6
Junction Temperature				150	°C		6
Lead Temperature				260	°C	Soldering, 10 sec.	6
Storage Temperature Range		-65		150	°C		6
ESD Susceptibility HBM				2	kV	HBM (Human Body Model)	6
Package Thermal Resistance Junction-to-Ambient	θJA			30	°C/W	WQFN-20L 3x3	6
Package Thermal Resistance Junction-to-Case	θJC			7.5	°C/W	WQFN-20L 3x3	6
Supply Voltage	VIN	5		25	V		6
Junction Temperature Range		-40		125	°C		6
Ambient Temperature Range		-40		85	°C		6

CAD (KiCad official)

Symbol: RT6576DGQW
Footprint: Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm
3D model: WQFN-20-EP(3x3) (KiCad packages3D, STEP)
3D model files: rt6576dgqw-etched.step / rt6576dgqw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt6576dgqw.step / rt6576dgqw.glb are the bare package body.

Provenance

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

Datasheet: Richtek Tech datasheet (22 pp, sha256 7f62ce8acae8f459, retrieved 2026-10-20, 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