參數(shù)資料
型號(hào): LTC3445EUF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: I2C Controllable Buck Regulator with Two LDOs in a 4mm ?4mm QFN
中文描述: 0.8 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PQCC24
封裝: 4 X 4 MM, PLASTIC, MO-220-WGGD, QFN-24
文件頁(yè)數(shù): 5/24頁(yè)
文件大?。?/td> 465K
代理商: LTC3445EUF
5
LTC3445
3445fa
Buck Efficiency and Power Loss
vs Load Current, V
CC1
= 2.5V
Buck Output Voltage
vs Load Current
LOAD CURRENT (mA)
30
E
P
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3445 G04
0
1
100
1000
10
1.0
0.1
DAC MAX
DAC MIN
DAC MIN
DAC MAX
EFFICIENCY
POWER LOSS
LOAD CURRENT (mA)
30
E
P
90
100
20
10
80
50
70
60
40
0.1
10
100
1000
3445 G05
0
1
100
1000
10
1.0
0.1
DAC MAX
DAC MIN
DAC MIN
DAC MAX
EFFICIENCY
POWER LOSS
LOAD CURRENT (mA)
–100
B
0.800
0.850
700
3445 G06
0.750
0.700
100
300
0.900
500
900
DAC = MIN
Buck Output Voltage
vs Load Current
I
VCC2
vs Temperature (RUN = V
CC1
)
LOAD CURRENT (mA)
–100
B
1.500
1.540
1.520
1.560
700
3445 G07
1.480
1.460
100
300
1.580
500
900
DAC = MAX
TEMPERATURE (
°
C)
0
V
C
μ
A
0.4
0.8
1.2
0.2
0.6
1.0
–10
30
70
110
3445 G08
150
–50
V
CC2
= 2.5V
V
CC2
= 3.6V
V
CC2
= 4.2V
V
CC2
= 5.5V
I
VCC2
vs Temperature (RUN = 0V)
TEMPERATURE (
°
C)
0
V
C
μ
A
0.4
0.8
1.2
0.2
0.6
1.0
–10
30
70
110
3445 G09
150
–50
V
CC2
= 2.5V
V
CC2
= 3.6V
V
CC2
= 4.2V
V
CC2
= 5.5V
TYPICAL PERFOR U
R
DS(ON)
vs Input Voltage
Synchronous Switch R
DS(ON)
vs Temperature
INPUT VOLTAGE (V)
2.2 2.6
3
3.4 3.8 4.2 4.6
5
5.4
250
R
D
)
300
400
450
500
600
3445 G10
350
5.8
550
MAIN SWITCH
SYNCHRONOUS SWITCH
TEMPERATURE (
°
C)
–40
R
D
)
500
600
700
120
3445 G11
400
300
200
–20
0
20
40
60
80 100
140
V
CC1
= 2.5V
V
CC1
= 3.6V
V
CC1
= 4.2V
V
CC1
= 5.5V
Main Switch R
DS(ON)
vs Temperature
TEMPERATURE (
°
C)
–40
R
D
)
600
700
800
120
3445 G12
500
400
300
–20
0
20
40
60
80 100
140
V
CC1
= 2.5V
V
CC1
= 3.6V
V
CC1
= 4.2V
V
CC1
= 5.5V
Buck Efficiency and Power Loss
vs Load Current, V
CC1
= 4.2V
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