SC21150 Datasheet, PDF (10/20 Pages) Semtech Corporation – Tiny 1.2A Synchronous Buck Regulator

SC21150
Typical Characteristics (continued)
Load Transient - Power Save PFM to PWM
VIN = 3.3V, VOUT = 1.0V, Load 0A to 1.2A to 0A, FPWM = GND
VOUT (50mV/div)
LOAD (1A/div)
LX (5V/div)
Time (100μs/div)
Load Transient - Power Save PFM to PWM
VIN = 5V, VOUT = 3.3V, Load 0A to 1.2A to 0A, FPWM = VIN
VOUT (100mV/div)
LOAD (1A/div)
LX (5V/div)
Time (100μs/div)
Load Transient - PWM to PWM
VIN = 3.3V, VOUT = 1.0V, Load 0A to 1.2A to 0A, FPWM = GND
VOUT (50mV/div)
LOAD (1A/div)
LX (5V/div)
Time (100µs/div)
Load Transient - PWM to PWM
VIN = 5V, VOUT = 3.3V, Load 0A to 1.2A to 0A, FPWM = VIN
VOUT (100mV/div)
LOAD (1A/div)
LX (5V/div)
Time (100µs/div)
PWM Minimum Off Operation
VIN = 3.7V, VOUT = 3.3V, 800mA Load
VOUT (50mV/div)
LX (5V/div)
Time (2µs/div)
Overcurrent Shutdown and Recovery
VIN = 5V, VOUT = 1.0V, Load 0A to 2.0A to 0A, FPWM = GND
VOUT (1V/div)
LOAD (2A/div)
LX (5V/div)
Time (400µs/div)
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