參數(shù)資料
型號: LTC3569EUDC#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 2.5 A SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PQCC20
封裝: 3 X 4 MM, LEAD FREE, PLASTIC, QFN-20
文件頁數(shù): 22/26頁
文件大小: 468K
代理商: LTC3569EUDC#TRPBF
LTC3569
5
3569fd
Efficiency vs VSUPPLY
OUT1 = 1.8V
Efficiency vs VSUPPLY
OUT2 = 1.2V
Efficiency vs VSUPPLY
OUT3 = 1.5V
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
vs Temperature
RDS(ON) SW1
vs VSUPPLY and Temperature
RDS(ON) SW2 and SW3
vs VSUPPLY and Temperature
VFB vs Temperature
ISVIN vs VSUPPLY Pulse-Skipping
ISVIN
vs VSUPPLY Burst Mode Operation
VSUPPLY (V)
2
EFFICIENCY
(%)
95
90
75
85
80
70
65
4
3569 G04
6
5
3
BUCK1 ONLY
ILOAD = 270mA
ILOAD = 220mA
ILOAD = 170mA
ILOAD = 120mA
VSUPPLY (V)
2
EFFICIENCY
(%)
95
90
75
85
80
70
65
4
3569 G05
6
5
3
BUCK2 ONLY
ILOAD = 210mA
ILOAD = 170mA
ILOAD = 110mA
ILOAD = 70mA
VSUPPLY (V)
2
EFFICIENCY
(%)
95
90
75
85
80
70
65
4
3569 G06
6
5
3
BUCK3 ONLY
ILOAD = 210mA
ILOAD = 170mA
ILOAD = 110mA
ILOAD = 70mA
TEMPERATURE (°C)
–50
f CLK
(MHz)
2.40
2.30
2.10
2.20
2.00
50
3569 G07
150
100
0
VIN = 5.5V
VIN = 3.5V
VIN = 2.5V
VRT = SVIN
VSUPPLY (V)
2
R
DS(ON)
()
0.35
0.30
0.20
0.25
0.15
0.10
4
3569 G08
6
5
3
NSW1
PSW1
100°C
25°C
–50°C
VSUPPLY (V)
2
R
DS(ON)
()
0.50
0.30
0.35
0.40
0.45
0.20
0.25
0.15
0.10
4
3569 G09
6
5
3
NSW2 & 3
PSW3 & 3
100°C
25°C
–50°C
TEMPERATURE (°C)
–50
V FB
ERROR
(%)
0.3
0.2
–0.2
–0.1
0.1
0.0
–0.3
50
3569 G10
150
100
0
VREF SET TO MAX
VFB1
VFB2
VFB3
VSUPPLY (V)
2
I SVIN
(A)
700
400
500
600
200
300
100
0
4
3569 G11
6
5
3
ALL 3
2 BUCKS ENABLED
1 BUCK ENABLED
NO LOAD
VSUPPLY (V)
2
I SVIN
(A)
120
60
80
100
20
40
0
4
3569 G12
6
5
3
ALL 3
2 BUCKS ENABLED
1 BUCK ENABLED
NO LOAD
TA = 25°C, unless otherwise noted.
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