Datasheet LTC1980 (Analog Devices) - 5

LTC1980
W U TYPICAL PERFOR A CE CHARACTERISTICS Typical BGTDR and RGTDR Typical ISENSE Waveforms, Typical Operation with Burst Waveforms Regulator Mode Operation Disabled
V BGTDR REG 50mV/DIV 1V/DIV ISENSE 20mV/DIV PIN 21 FIGURE 5 RGTDR ISENSE 1V/DIV 50mV/DIV V 1 1980 G07 1980 G08 1980 G09 BAT = 3.6V µs/DIV V 1 BAT = 3.6V µs/DIV V 1 BAT = 3.6V µs/DIV VREG = 3.3V VREG = 3.3V VREG ≅ 3.3V TA = 25°C IL = 500mA IL = 500mA IL = 500mA TA = 25°C MODE = VBIAS1 FIGURE 5 TA = 25°C FIGURE 5
Regulator Output Transient Regulator Output Transient Response—Wall Adapter “Hot Burst Mode Circuit Operation Response—Wall Adapter Removal Plugged”
VREG 50mV/DIV V V REG REG 1V/DIV 1V/DIV BGTDR VLDO V 2V/DIV 0.1V/DIV LDO 0.5V/DIV 1980 G11 V 200 1980 G10 1980 G12 BAT = 3.6V µs/DIV V 500 BAT = 3.6V µs/DIV V 500 BAT = 3.6V µs/DIV VREG = 3.3V VREG = 3.3V VREG = 3.3V IL = 10mA VLDO = 3.1V VLDO = 3.1V TA = 25°C ILDO = 200mA ILDO = 200mA FIGURE 5 VWALL ADAPTER = 6V TO 0V VWALL ADAPTER = 0V TO 6V TA = 25°C TA = 25°C FIGURE 5 FIGURE 5
Mode Pin Input Current vs VIN Typical CTIMER Waveform
1.5 VBAT = 2.4V VREG = 5V A) 1.0 TA = 25°C µ 0.5 TIMER 100mV/DIV PIN 17 0 –0.5 MODE PIN INPUT CURRENT ( –1.0 C 5ms/DIV 1980 G14 TIMER = 0.24µF TA = 25°C –1.5 0 0.5 1.0 1.5 2.0 2.5 3.0 MODE PIN VIN (V) 1980 G13 1980f 5