TPS543x21 3.8V to 18V, 5A, 4A, 3A, Synchronous Buck Converters With User Selectable
Mode
1 Features
Configured for a wide range of applications
3.8V to 18V input voltage range
Up to 5A (TPS543521), 4A (TPS543421), 3A
(TPS543321) continuous output current
0.6V ±1% reference voltage (–40°C to
150°C)
70ns and 114ns minimum switching on and off-time
8us maximum switching on-time
98% maximum duty cycle
High efficiency
Integrated 47mΩ and 21mΩ MOSFETs
Low quiescent current of 28uA
(typical)
Ease of use and small design size
Peak current control mode with
internal compensation
200kHz to 2.2MHz selectable
frequency
Synchronizable to an external clock (support
phase shift): 200kHz to 2.2MHz
Selectable PFM / FCCM at light load
condition
Selectable adjustable soft-start time, power-good indicator function
Good EMI performance with frequency spread
spectrum and optimized pinout
Hiccup overcurrent (OC) limit for both high-side
and low-side MOSFETs
Non-latched protections for over temperature
protection (OTP), overcurrent protection (OCP), overvoltage protection (OVP),
undervoltage protection (UVP), and undervoltage lockout (UVLO)
Integrated bootstrap capacitor to
support single-layer PCB layout