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LT8331 数据表(PDF) 21 Page - Analog Devices

部件名 LT8331
功能描述  28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

LT8331 数据表(HTML) 21 Page - Analog Devices

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LT8337/LT8337-1
21
Rev. 0
For more information www.analog.com
TYPICAL APPLICATIONS
2.85V to 4.2V Input, 2MHz, 5V Output Boost Converter
Efficiency vs Output Current
LOAD CURRENT (mA)
0.01
0.1
1
10
100
1000
50
55
60
65
70
75
80
85
90
95
100
83371 TA03b
VIN = 4.2V
VIN = 3.6V
VIN = 2.85V
Burst Mode OPERATION
L: COILCRAFT XGL4030-471ME
VOUT
5V
3A AT 3.6VIN
2A AT 2.85VIN
47µF
6.3V
X7R
×2
1µF
6.3V
X7R
×2
INTVCC
SYNC/MODE
PG
VIN
SW
BST
EN/UVLO
FB
GND
VOUT
LT8337
RT
L
0.47µH
0.1µF
1M
249k
1µF
47.5k
2MHz
4.7pF
1M
549k
UVLOFALLING = 2.85V
VIN
2.85V TO 4.2V
47µF
6.3V
X7R
83371 TA03a
5V to 15V Input, 2MHz, 12V Output Boost Converter
Efficiency vs Output Current
Efficiency vs Input Voltage
VIN = 7.2V
VIN = 5V
OUTPUT CURRENT (mA)
0.1
1
10
100
1000
50
55
60
65
70
75
80
85
90
95
100
83371 F04b
Burst Mode OPERATION
Burst Mode OPERATION
ILOAD = 1.5A
INPUT VOLTAGE (V)
5
6
7
9
11
13
15
8
10
12
14
90
93
92
91
94
95
96
97
98
99
100
83371 TA04c
22µF
25V
X7R
×4
1µF
25V
X7R
×2
INTVCC
SYNC/MODE
PG
VIN
SW
BST
EN/UVLO
FB
GND
VOUT
LT8337
RT
L
1.5µH
0.1µF
1M
90.9k
1µF
47.5k
2MHz
4.7pF
1M
287k
UVLOFALLING = 4.5V
22µF
25V
X7R
83371 TA04a
VOUT*
12V
1.2A AT 5VIN
2.2A AT 7.2VIN
L: COILCRAFT XGL4020-152ME
*WHEN VIN > 12V, VOUT FOLLOWS VIN.
VIN
5V TO 15V



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