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LTC3552 датащи(PDF) 6 Page - Linear Technology

номер детали LTC3552
подробное описание детали  Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
PDF  24 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC3552 датащи(HTML) 6 Page - Linear Technology

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LTC3552
6
3552f
TYPICAL PERFOR A CE CHARACTERISTICS
3552 G14
VCC = 3.6V
VOUT1 = 1.8V
ILOAD = 60mA, MODE/SYNC = 3.6V
REGULATOR 1; CIRCUIT OF FIGURE 2
SW
5V/DIV
VOUT
RIPPLE
20mV/DIV
IL
200mA/
DIV
2
µs/DIV
3552 G16
VCC = 3.6V
VOUT1 = 1.8V
ILOAD = 30mA, MODE/SYNC = 0V
REGULATOR 1; CIRCUIT OF FIGURE 2
SW
5V/DIV
VOUT
10mV/
DIV
IL
200mA
/DIV
1
µs/DIV
3552 G17
VCC (V)
2
3
45
6
100
95
90
85
80
75
70
65
60
VOUT = 1.8V, REGULATOR 1
Burst Mode OPERATION
CIRCUIT OF FIGURE 2
800mA
10mA
100mA
1mA
2.5
2.4
2.3
2.2
2.1
2.0
TEMPERATURE (
°C)
–50
25
75
3552 G18
–25
0
50
100
125
VCC = 3.6V
10
8
6
4
2
0
–2
–4
–6
–8
–10
VCC (V)
2
3552 G19
3
45
6
Battery Charger
Efficiency vs VCC
Oscillator Frequency
vs Temperature
Oscillator Frequency
Error vs VCC
Burst Mode Operation
Load Step
Pulse-Skipping Mode
TA = 25°C Unless Otherwise Specified.
3552 G15
VCC = 3.6V
VOUT1 = 1.8V
ILOAD = 80mA TO 800mA
REGULATOR 1; CIRCUIT OF FIGURE 2
VOUT
200mV/DIV
ILOAD:
80mA-
800mA
500mA/DIV
IL
500mA/DIV
20
µs/DIV
TEMPERATURE (
°C)
–50
4.04
4.06
4.08
4.10
4.12
4.16
–25
025
50
3552 G13
75
100
4.14
VIN = 5V
RPROG = 10k
Recharge Threshold Voltage
vs Temperature
TEMPERATURE (
°C)
–50
350
400
450
500
600
550
650
700
–25
025
50
3552 G12
75
125
100
VIN = 4.2V
IBAT = 100mA
RPROG = 2k
Power FET On-Resistance
vs Temperature
Switching Regulator



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