RT8073

6A, 2MHz, High Efficiency Synchronous Step-Down Converter

The RT8073 is a high efficiency PWM step-down converter and capable of delivering 6A output current over a wide input voltage range from 2.9V to 5.5V.

The RT8073 provides accurate regulation for a variety of loads with an ±1% reference voltage at room temperature. For reducing inductor size, it provides up to 2MHz switching frequency. The efficiency is maximized through the integrated 50mΩ for high side, 35mΩ for low side MOSFETs and 250μA typical supply current.

The RT8073 features over current protection, frequency fold back function in shorted circuit, hiccup mode under voltage protection and over temperature protection.

The RT8073 is available in SOP-8 (Exposed Pad) and WDFN-12L 3x3 packages.

Applications

Low Voltage, High Density Power Systems
Distributed Power Systems
Point-of-Load Conversions

Key Spec.
	RT8073
Status	Active
Vin (min) (V)	2.9
Vin (max) (V)	5.5
Number of Outputs	1
Vout (min) (V)	0.8
Output Adj. Method	Resistor
Iout (max) (A)	6
Current Limit (typ) (A)	9
Freq (typ) (kHz)	1400
Freq (min) (kHz)	300
Freq (max) (kHz)	2000
Ext Sync	No
Ron_HS (typ) (mOhm)	50
Ron_LS (typ) (mOhm)	35
Iq (typ) (mA)	0.25
Features	Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;OCP;OTP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8;WDFN3x3-12

Features

Integrated 50mΩ and 35mΩ MOSFETs
6A Output Current
High Efficiency Up to 95%
2.9V to 5.5V Input Range
Adjustable PWM Frequency : 300kHz to 2MHz
0.8V ±1% Reference Voltage
Adjustable External Soft-Start
Power Good Indicator (WDFN-12L 3x3 only)
Over Current Protection
Under Voltage Protection
Over Temperature Protection
SOP-8 (Exposed Pad) and 12-Lead WDFN Packages
RoHS Compliant and Halogen Free

Datasheet
Title	Version	Last Update	Download
RT8073: 6A, 2MHz, High Efficiency Synchronous Step-Down Converter	V3.0	2023/07/07

Technical Documents
Title	Item Type	Last Update	Download
Richtek Product Selection Guide [Jan., 2024]	Selection Guide	2024/01/18

Videos
Title	Last Update	Views
How to estimate control loop bandwidth from the transient response time?	2017/03/30	2600

Reference Design
Title	Last Update	Download
Richtek Load Transient Tool	2022/07/25

Part Number	Package Type	Package Qty.	Free Sample	Distributor	Stock	Buy From Authorized Distributor
RT8073GQW	WDFN3x3-12	1,500	Request	Digikey	2,708	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT8073GSP	PSOP-8	2,500	Request	Digikey	9,517	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available

Please confirm with our distributor or sales representative for actual stock status.