Datasheet LTC3130, LTC3130-1 (Analog Devices) - 9

LTC3130/LTC3130-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Fixed Frequency PWM Fixed Frequency PWM Fixed Frequency Output Waveforms (Buck-Boost Region) Waveforms (Boost Region) Voltage Ripple
SW2 SW2 V (5V/DIV) (10V/DIV) OUT (50mV/DIV) SW1 SW1 (5V/DIV) (5V/DIV) INDUCTOR CURRENT INDUCTOR INDUCTOR (0.2A/DIV) CURRENT CURRENT (0.5A/DIV) (0.5A/DIV) 0 200nsec/DIV 3130 G37 200nsec/DIV 3130 G38 500nsec/DIV 3130 G39 12VIN, 5VOUT, ILOAD = 0.5A, COUT = 22µF
PWM to Burst Mode Operation Start-Up Sequence When Burst Mode Operation Waveforms Transition Applying VIN (RUN Tied to VIN)
V V IN OUT (10V/DIV) VOUT (100mV/ (50mV/DIV) DIV) VCC MODE PIN (2V/DIV) (2V/DIV) VOUT (2V/DIV) INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT (0.2A/DIV) (0.2A/DIV) (0.2A/DIV) 20μsec/DIV 3130 G40 1msec/DIV 3130 G41 2msec/DIV 3130 G42 5VOUT 12VIN, 5VOUT, COUT = 22µF ILOAD =10mA ILOAD = 20mA, COUT = 22µF COUT = 22µF
Start-Up Sequence When Raising VCC Response to a Step on VCC Response to a Step on RUN Pin (VIN = 12V) EXTVCC (VIN > 4V) EXTVCC (VIN = 3V)
RUN (5V/DIV) VCC VCC (2V/DIV) VCC (2V/DIV) (2V/DIV) VOUT 0 0 (2V/DIV) INDUCTOR EXTV EXTV CC CC CURRENT (5V/DIV) (5V/DIV) (0.2A/DIV) 0 0 2msec/DIV 3138 G43 1msec/DIV 3130 G44 1msec/DIV 3130 G45 3130f For more information www.linear.com/LTC3130 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Typical Performance Characteristics Pin Functions LTC3130 Block Diagram LTC3130-1 Block Diagram Operation Applications Information Package Description Typical Application Related Parts