Richtek RT6341

Description

The RT6341 is a 1.5A, high-efficiency, peak current modecontrol asynchronous step-down converter. The deviceoperates with input voltages from 4V to 42V. The devicecan program the output voltage between 0.8V to VIN.The low quiescent current design with the integrated low RDS(ON) of high-side MOSFET achieves high efficiency over the wide load range. The peak current mode control with simple external compensation allows the use of small inductors and results in fast transient response and good loop stability. The wide switching frequency of 100kHz to 2500kHz allows for efficiency and size optimization when selecting the output filter components. The ultra-low minimum on-time enables constant-frequency operation even at very high step-down ratios. For switching noise sensitive applications, it can be externally synchronized from 300kHz to 2200kHz. The RT6341 provides complete protection functions such as input under-voltage lockout, output under-voltage protection, output over-voltage protection, over-current protection, and thermal shutdown. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT6341 is available in WDFN-10SL 3x3 and SOP-8 (Exposed pad) packages.

Features

• Wide Input Voltage Range
  • 4.5V to 42V
  • 4V to 42V (Soft-start is finished)
• Wide Output Voltage Range : 0.8V to VIN
• 0.8V ±1.5% Reference Accuracy
• Peak Current Mode Control
• Integrated 160mΩ High-Side MOSFET
• Low Quiescent Current : 90μA
• Low Shutdown Current : 1.3μA
• Adjustable Switching : 100kHz to 2.5MHz
• Synchronizable Switching : 300kHz to 2.2MHz
• Power Saving Mode (PSM) at Light Load
• Low Dropout at Light Loads with Integrated Boot Recharge FET
• Externally Adjustable Soft-Start by Part Number Option
• Power Good Indication by Part Number Option
• Enable Control
• Adjustable UVLO Voltage and Hysteresis
• Built-In UVLO, UVP, OVP, OCP, OTP

Typical applications

• GPS, Entertainment
• 12V and 24V Power Systems

More information

• Datasheet
• IC product information