4.5V-18V input 2A synchronous step-down chip ic overview:
QT5211 is a constant frequency, current mode step-down converter. QT5211 integrates a main switch synchronous rectifier, which can achieve high efficiency without external Schottky diodes.
It is ideal for powering portable devices powered by single-cell Lithium-ion (Li+) batteries. The output voltage can be adjusted to 0.6V. QT5211 can also work under 100% duty cycle to achieve low-drop operation, thereby extending the battery life of portable systems.
QT5211 provides two operation modes, PWM control and PFMModeswitching control, which can achieve high efficiency in a larger load range.
QT5211 is available in a flat 6-pin SOT package and is available in an adjustable version.
4.5V-18V input 2A synchronous step-down chip ic features:
High efficiency: up to 96%
500kHz constant frequency operation
2A output current
No Schottky diode required
4.5V to 18V input voltage range
Output voltage as low as 0.6V
Slope compensation current mode control provides excellent line and load transient response
Integrated internal compensation
Stable with low ESR ceramic output capacitor
Overcurrent protection in H mode
Thermal fault protection
Inrush current limit and soft start
-40°C to +85°C temperature range
Common application parameters of QT5211:
18v to 5v2A, 12v to 5v2A, 18v to 3v2A, 9v to 5v2A, 9v to 5v2A, 9v to 5v2A