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The RT7248 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7248's current mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start up. The RT7248 also provides under voltage protection and thermal shutdown protection. The low current (< 3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7248 is available in 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.
RT7248H RT7248N
Status Active Active
Vin (min) (V) 4.5 4.5
Vin (max) (V) 18 18
Number of Outputs 1 1
Vout (min) (V) 0.923 0.923
Vout (max) (V) 15 15
Output Adj. Method Resistor Resistor
Iout (max) (A) 2 2
Current Limit (typ) (A) 4 4
Freq (typ) (kHz) 340 340
Ext Sync No No
Ron_HS (typ) (mOhm) 150 150
Ron_LS (typ) (mOhm) 130 130
Iq (typ) (mA) 0.8 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 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 PSOP-8
Features
  • ±1.5% High Accuracy Feedback Voltage
  • Input Voltage Range : 4.5V to 18V
  • 2A Output Current
  • Integrated N-MOSFETs
  • Current Mode Control
  • 340kHz Fixed Frequency Operation
  • Output Adjustable Voltage Range : 0.923V to 15V
  • 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 UpdateDownload
2A, 18V, 340kHz Synchronous Step-Down Converter2012/02/22
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Please confirm with our distributor or sales representative for actual stock status.
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