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LTC1980 Datasheet(PDF) 4 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) 4 Page - Linear Technology

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LTC1980
4
1980f
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.VBAT = 2.4V, VREG = 5V, VBAT unloaded.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VP2
Digital Input Pull-Up Voltage, BATT1
BATT1 Input Floating
1.6
V
VIL3
Digital Input Low Voltage, BATT2
0.3
V
VIH3
Digital Input High Voltage, BATT2
2
V
II1
Digital Input Current, WA
–5
5
µA
II2
Digital Input Current, BATT1
–10
10
µA
II3
Digital Input Current, BATT2
–1
1
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1980E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
Feedback Reference Voltage
vs Temperature
Switching Frequency Variance
vs Temperature
Regulator Load Regulation
3.3V Regulator Efficiency
vs Load Current
5V Regulator Efficiency
vs Load Current
Regulator Load Step Response
TYPICAL PERFOR A CE CHARACTERISTICS
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: TA = 0°C to 70°C.
TEMPERATURE (°C)
1980 G01
1.2240
1.2235
1.2230
1.2225
1.2220
1.2215
1.2210
1.2205
–40
–15
10
35
60
85
TEMPERATURE (°C)
1980 G02
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–40
–15
10
35
60
85
LOAD CURRENT (mA)
0
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
100
200
300
400
1980 G03
500
VBAT = 4.2V
VREG ≅ 3.3V
TA = 25°C
FIGURE 5
LOAD CURRENT (mA)
10
90
85
80
75
70
65
60
100
1000
1980 G04
VBAT = 3.6V
TA = 25°C
FIGURE 5
LOAD CURRENT (mA)
10
90
85
80
75
70
65
60
100
1000
1980 G05
VBAT = 3.6V
TA = 25°C
R8 = 309k
FIGURE 5
VREG
50mV/DIV
100µs/DIV
IL
500mA/DIV
VBAT = 3.6V
VREG ≅ 3.3V
IL = 100mA TO 500mA
TA = 25°C
FIGURE 5
1980 G06



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