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参数资料
型号： LTC3675EUFF#TRPBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 电源管理
英文描述： POWER SUPPLY SUPPORT CKT, PQCC44
封装： 4 X 7 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-44
文件页数： 36/36页
文件大小： 413K
代理商： LTC3675EUFF#TRPBF
LTC3675
9
3675f
TYPICAL PERFORMANCE CHARACTERISTICS
1A Buck Regulators,
VOUT1 vs Temperature
1A Buck Regulators, PMOS
Current Limit vs Temperature
1A Buck Regulators, Switch
RDSON vs Temperature
500mA Buck Regulators,
Efciency vs Load
500mA Buck Regulators,
Load Regulation
500mA Buck Regulators,
Line Regulation
1A Buck Regulators, Transient
Response (Pulse-Skipping Mode)
1A Buck Regulators, Transient
Response (Burst Mode Operation)
1A Buck Regulators, No Load
Start-Up Transient
(Pulse-Skipping Mode)
25μs/DIV
VOUT1
500mV/DIV
INDUCTOR
CURRENT
500mA/DIV
EN1
2V/DIV
3675 G12
VIN = 3.6V
TEMPERATURE (°C)
I FW
D
1
,2
(A)
3.6
3.2
3.4
2.8
3.0
2.2
2.0
2.6
2.4
1.8
1.6
–15
–35
3675 G14
5
25
65
85 105 125
–55
45
VIN = 3.6V
VIN = 5.5V
VIN = 2.7V
TEMPERATURE (°C)
R
DSON
(Ω)
0.60
0.50
0.55
0.40
0.45
0.25
0.20
0.35
0.30
0.15
0.10
0.05
0
–15
–35
3675 G15
5
25
65
85 105 125
–55
45
NMOS RDSON, VIN = 5.5V
NMOS RDSON, VIN = 2.7V
PMOS RDSON, VIN = 5.5V
PMOS RDSON, VIN = 2.7V
50μs/DIV
VOUT1
100mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
200mA/DIV
0mA
LOAD STEP = 100mA TO 700mA
VIN = 3.6V, VOUT1 = 1.2V
3675 G10
50μs/DIV
VOUT1
100mV/DIV
AC-COUPLED
INDUCTOR
CURRENT
200mA/DIV
0mA
3675 G11
LOAD STEP = 100mA TO 700mA
VIN = 3.6V, VOUT1 = 1.2V
LOAD CURRENT (mA)
EFFICIENCY
(%)
100
80
90
60
70
30
20
50
40
10
0
10
3675 G16
1000
1
100
VIN = 2.7V Burst Mode OPERATION
VIN = 3.6V Burst Mode OPERATION
VIN = 5.5V Burst Mode OPERATION
VIN = 2.7V PULSE SKIPPING-MODE
VIN = 3.6V PULSE SKIPPING-MODE
VIN = 5.5V PULSE SKIPPING-MODE
VOUT3 = 1.8V
LOAD CURRENT (mA)
V
OUT3
(V)
1.830
1.820
1.825
1.810
1.815
1.795
1.790
1.805
1.800
1.785
1.780
1.775
1.770
100
10
3675 G17
1000
1
VIN = 5.5V
VIN = 2.7V
PULSE-SKIPPING MODE
VIN = 3.6V
VIN (V)
V
OUT3
(V)
1.830
1.810
1.820
1.825
1.815
1.790
1.800
1.805
1.770
1.795
1.785
1.780
1.775
3.5
3.1
3675 G18
3.9
4.3
5.1
5.5
2.7
4.7
LOAD = 250mA
PULSE-SKIPPING MODE
LOAD = 50mA
TEMPERATURE (°C)
V
OUT1
(V)
1.25
1.23
1.24
1.21
1.22
1.18
1.17
1.20
1.19
1.16
1.15
–15
–35
3675 G13
5
25
65
85 105 125
–55
45
VIN = 3.6V
VIN = 5.5V
VIN = 2.7V
PULSE-SKIPPING MODE
LOAD = 500mA
TA = 25°C, unless otherwise noted.
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