RT6268

3.7A, 36V, 100kHz Asynchronous Step-Down Converter with Load Line Compensation

The RT6268 is a high-efficiency, monolithic asynchronous step-down DC/DC converter that can deliver up to 3.7A output current from a 7V to 36V input supply. The RT6268's current mode architecture with internal compensation is optimized for 5V car charger application over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT6268 also provides output over voltage protection output under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems. The RT6268 is available in a SOP-8 (Exposed Pad) package.

Applications

USB Power Supplies
Automotive Cigarette Lighter Adapters
Power Supply for Linear Chargers
DC/DC Converters with Current Limited

Key Spec.
	RT6268
Status	Active
Vin (min) (V)	7
Vin (max) (V)	36
Number of Outputs	1
Vout (min) (V)	0.8
Vout (max) (V)	5.5
Output Adj. Method	Resistor
Iout (max) (A)	3.7
Current Limit (typ) (A)	5.8
Freq (typ) (kHz)	100
Ext Sync	No
Ron_HS (typ) (mOhm)	60
Iq (typ) (mA)	0.8
Features	Adjustable Current Limit;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Internal Compensation;OCP;OTP;OVP;PSM;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8

Features

±1% High Accuracy Feedback Voltage
7V to 36V Input Voltage Range
3.7A Peak Output Current
CC/CV Mode Control
Adjustable Load Line Compensation
Short Circuit Protection
Integrated N-MOSFET Switches
Current Mode Control
Fixed Frequency Operation : 100kHz
Programmable Output Current Limit
60mΩ Internal Power MOSFET Switch
Low EMI signature
Up to 95% Efficiency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Output Under Voltage Protection
Thermal Shutdown Protection

Datasheet
Title	Version	Last Update	Download
RT6268: 3.7A, 36V, 100kHz Asynchronous Step-Down Converter with Load Line Compensation	Initial Release

Videos
Title	Last Update	Views
How to estimate control loop bandwidth from the transient response time?	2017/03/30	2667

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
RT6268GSP	PSOP-8	2,500	Request	Digikey	2,196	Buy
RT6268GSP	PSOP-8	2,500	Request	Mouser	0	Lead-Time: 14 weeks

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