RT8272

3A, 24V, 1.2MHz Step-Down Converter

The RT8272 is a high voltage buck converter that can support the input voltage range from 4.75V to 24V and the output current can be up to 3A. Current Mode operation provides fast transient response and eases loop stabilization.
The chip provides protection functions such as cycle-by-cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 25μA of supply current. The RT8272 is available in a SOP-8 (Exposed Pad) surface mount package.

Applications

Distributive Power Systems
Battery Charger
DSL Modems
Pre-regulator for Linear Regulators

Key Spec.
	RT8272
Status	Active
Vin (min) (V)	4.75
Vin (max) (V)	24
Number of Outputs	1
Vout (min) (V)	0.92
Vout (max) (V)	15
Output Adj. Method	Resistor
Iout (max) (A)	3
Current Limit (typ) (A)	4.1
Freq (typ) (kHz)	1200
Ext Sync	No
Ron_HS (typ) (mOhm)	100
Iq (typ) (mA)	0.8
Features	Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8

Features

Wide Operating Input Range : 4.75V to 24V
Adjustable Output Voltage Range : 0.92V to 15V
Output Current up to 3A
25μA Low Shutdown Current
Power MOSFET : 0.1Ω
High Efficiency up to 95%
1.2MHz Fixed Switching Frequency
Stable with Low ESR Output Ceramic Capacitors
Thermal Shutdown Protection
Cycle-By-Cycle Over Current Protection
RoHS Compliant and Halogen Free

Datasheet
Title	Version	Last Update	Download
RT8272: 3A, 24V, 1.2MHz Step-Down Converter	V2.0	2011/08/25

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	2648

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
RT8272GSP	PSOP-8	2,500	Request	Digikey	2,600	Buy
RT8272GSP	PSOP-8	2,500	Request	Mouser	0	Lead-Time: 14 weeks

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