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LTC1980 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC1980
Description  Combination Battery Charger and DC/DC Converter
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1980 Datasheet(HTML) 5 Page - Linear Technology

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



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