2A, 24V, 1.2MHz Step-Down Converter

RT8271

The RT8271 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 2A. Current Mode operation provides fast transient response and eases loop stabilization. The RT8271 also provides adjustable soft-start to be a flexible solution for customers.
The chip provides protection functions such as cycle-by-cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 22μA of supply current. The RT8271 is available in the SOP-8 and MSOP-10 (Exposed Pad) surface mount package.

Applications

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

Key Spec.

	RT8271
Status	EOL
Vin (min) (V)	4.75
Vin (max) (V)	24
Number of Outputs	1
Vout (min) (V)	0.92
Vout (max) (V)	16
Output Adj. Method	Resistor
Iout (max) (A)	2
Current Limit (typ) (A)	3
Freq (typ) (kHz)	1200
Ext Sync	No
Ron_HS (typ) (mOhm)	180
Iq (typ) (mA)	0.6
Features	Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type	MSOP-10(PP)

Features

Wide Operating Input Range : 4.75V to 24V
Adjustable Output Voltage Range : 0.92V to 16V
Output Current up to 2A
22μA Low Shutdown Current
Power MOSFET : 0.18Ω
High Efficiency up to 92%
1.2MHz Fixed Switching Frequency
Stable with Low ESR Output Ceramic Capacitors
Programmable Soft-Start
Thermal Shutdown Protection
Cycle-By-Cycle Over Current Protection
RoHS Compliant and Halogen Free

Datasheet

DS8271-02.pdf

Videos

How to estimate control loop bandwidth from the transient response time?

Richtek Load Transient Tool

Datasheet

DS8271-02.pdf