LTC1980 Просмотр технического описания (PDF) - Linear Technology
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LTC1980 Datasheet PDF : 16 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC1980
Typical BGTDR and RGTDR
Waveforms
Typical ISENSE Waveforms,
Regulator
Typical Operation with Burst
Mode Operation Disabled
BGTDR
1V/DIV
RGTDR
1V/DIV
ISENSE
20mV/DIV
PIN 21
FIGURE 5
VREG
50mV/DIV
ISENSE
50mV/DIV
VBAT = 3.6V
VREG = 3.3V
TA = 25°C
IL = 500mA
1µs/DIV
1980 G07
Burst Mode Circuit Operation
VBAT = 3.6V
VREG = 3.3V
IL = 500mA
TA = 25°C
FIGURE 5
1µs/DIV
1980 G08
Regulator Output Transient
Response—Wall Adapter Removal
VBAT = 3.6V
VREG ≅ 3.3V
IL = 500mA
MODE = VBIAS1
TA = 25°C
FIGURE 5
1µs/DIV
1980 G09
Regulator Output Transient
Response—Wall Adapter “Hot
Plugged”
VREG
50mV/DIV
VREG
1V/DIV
VREG
1V/DIV
BGTDR
2V/DIV
VLDO
0.1V/DIV
VLDO
0.5V/DIV
VBAT = 3.6V
VREG = 3.3V
IL = 10mA
TA = 25°C
FIGURE 5
200µs/DIV
1980 G10
VBAT = 3.6V
500µs/DIV
VREG = 3.3V
VLDO = 3.1V
ILDO = 200mA
VWALL ADAPTER = 6V TO 0V
TA = 25°C
FIGURE 5
1980 G11
VBAT = 3.6V
500µs/DIV
VREG = 3.3V
VLDO = 3.1V
ILDO = 200mA
VWALL ADAPTER = 0V TO 6V
TA = 25°C
FIGURE 5
Mode Pin Input Current vs VIN
1.5
VBAT = 2.4V
VREG = 5V
1.0 TA = 25°C
0.5
0
–0.5
–1.0
–1.5
0
0.5 1.0 1.5 2.0
MODE PIN VIN (V)
2.5 3.0
1980 G13
Typical CTIMER Waveform
TIMER
100mV/DIV
PIN 17
CTIMER = 0.24µF 5ms/DIV
TA = 25°C
1980 G14
1980 G12
1980f
5
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