Richtek has unveiled the RT5716, a high switching frequency synchronous step-down converter with a quiescent current of 2.3 μA. The device uses RBCOT (Ripple-Based Constant-On-Time) control to enhance load/line transient response to be optimized over a wide range of loads and output capacitors.
The RT5716 input voltage range is from 1.8 V to 5.5 V, making it suitable for battery applications. It provides 16 selectable output voltage levels by connecting the resistor between the RSEL/MODE pin and GND. The PFM design can maintain high efficiency during the light load. At higher load conditions, the device automatically switches to PWM. The device can deliver up to 0.6/1 A loading current. In shutdown mode, the supply current is typically 55 nA, excellent in reducing power consumption.
The RT5716 is available in TWL-CSP-6B 0.69x1.04 (BSC) and WDFN-6L 1.5x1.5 (FC) packages that have the smallest packages for small-size applications.
The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
Key Features
- 4 MHz Switching Frequency
- 2.3 μA Operating Quiescent Current
- Input Voltage Range: 1.8 V to 5.5 V
- 16 Selectable Output Voltages by RSEL/MODE
- Pin and Fixed Output Voltage Without RSEL Setting
- RBCOT Control for Transient Response
- Selectable PSM and FPWM Mode
- Output Voltage Discharge
- OCP, OTP and UVLO Protection
- 0.6 A or 1 A Loading Current
Key Applications
- Hand-Held Devices
- Portable Information
- Asset Tracking Devices
- Battery Powered Equipment
- Wearable Devices
- Internet of Things
