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2A, 23V, 340kHz Synchronous Step-Down Converter

RT8284

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The RT8284 is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 23V input supply. The RT8284's current mode architecture and external compensation allow the transient response to be optimized 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 RT8284 also provides 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 RT8284 is a available in a SOP-8 and SOP-8 (Exposed Pad) package.

Applications

  • Wireless AP/Router
  • Set-Top-Box
  • Industrial and Commercial Low Power Systems
  • LCD Monitors and TVs
  • Green Electronics/Appliances
  • Point of Load Regulation of High-Performance DSPs
Key Spec.
RT8284
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 23
Number of Outputs 1
Vout (min) (V) 0.923
Vout (max) (V) 20
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 4.5
Freq (typ) (kHz) 340
Ext Sync No
Ron_HS (typ) (mOhm) 130
Ron_LS (typ) (mOhm) 130
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Enable Input;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8;SOP-8
Features
  • ±1.5% High Accuracy Feedback Voltage
  • Input Voltage Range : 4.5V to 23V
  • 2A Output Current
  • Integrated N-MOSFETs
  • Current Mode Control
  • 340kHz Fixed Frequency Operation
  • Output Adjustable Voltage Range : 0.923V to 20V
  • Efficiency Up to 95%
  • Programmable Soft-Start
  • Stable with Low ESR Ceramic Output Capacitors
  • Cycle-by-Cycle Over Current Protection
  • Input Under Voltage Lockout
  • Output Under Voltage Protection
  • Thermal Shutdown Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
2A, 23V, 340kHz Synchronous Step-Down Converter2009/12/17
Reliability
Title Last Update ShareDownload
2A, 23V, 340kHz Synchronous Step-Down Converter 2015/05/19
Videos
TitleLast UpdateShareViews
How to estimate control loop bandwidth from the transient response time?2017/03/30 1105
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
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