LTC4090(RevA) 查看數據表（PDF） - Linear Technology
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LTC4090 Datasheet PDF : 28 Pages
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LTC4090/LTC4090-5
TYPICAL PERFORMANCE CHARACTERISTICS
Charging from USB, IBAT vs VBAT
600 VIN = 5V
VOUT = NO LOAD
500 RPROG = 100k
RCLPROG = 2k
HPWR = 5V
400
300
200
HPWR = 0V
100
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
VBAT (V)
4090 G04
Ideal Diode Current vs Forward
Voltage and Temperature with
External Device
5000
4500
4000
VBAT = 3.7V
VIN = 0V
Si2333 PFET
3500
3000
2500
2000
1500
1000
500
0
0
–50°C
0°C
50°C
100°C
20
40
60
80 100
VFWD (mV)
4090 G07
High Voltage Regulator Maximum
Load Current
3.0
FIGURE 12 SCHEMATIC
VBAT = 4.21V (IBAT = 0)
2.8
TYPICAL
2.6
2.4
2.2
MINIMUM
2.0
1.8
5
10 15 20 25
HVIN (V)
30 35
4090 G09
Charge Current vs Temperature
(Thermal Regulation)
600
500
400
300
200
RPROG = 2.1k
100 VIN = 5V
VBAT = 3.5V
0 θJA = 40°C/W
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
4090 G05
LTC4090 High Voltage Regulator
Efficiency vs Output Load
100 FIGURE 12 SCHEMATIC
95 VBAT = 4.21V (IBAT = 0)
90
85
80
75
70
65
60
HVIN = 8V
HVIN = 12V
55
HVIN = 24V
HVIN = 36V
50
0
0.2 0.4 0.6 0.8 1.0
IOUT (A)
4090 G08
High Voltage Regulator Minimum
Switch On-Time vs Temperature
140
120
100
80
60
40
20
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (˚C)
4090 G10
6
Ideal Diode Current vs Forward
Voltage and Temperature (No
External Device)
1000
VBAT = 3.7V
900 VIN = 0V
800
700
600
500
400
300
200
100
0
0
–50°C
0°C
50°C
100°C
50
100
150
200
VFWD (mV)
4090 G06
LTC4090-5 High Voltage Regulator
Efficiency vs Output Load
100 FIGURE 12 SCHEMATIC
95 VBAT = 4.21V (IBAT = 0)
90
85
80
75
70
65
60
HVIN = 8V
HVIN = 12V
55
HVIN = 24V
HVIN = 36V
50
0
0.2 0.4 0.6 0.8 1.0
IOUT (A)
4090 G29
High Voltage Regulator Switch
Voltage Drop
700
600
500
400
300
200
100
0
0
500 1000 1500 2000 2500
SWITCH CURRENT (mA)
4090 G11
4090fa
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