參數(shù)資料
型號: LTCEMSE-1#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, PDSO16
封裝: 0.150 INCH, LEAD FREE, PLASTIC, MSOP-16
文件頁數(shù): 24/28頁
文件大?。?/td> 337K
代理商: LTCEMSE-1#PBF
LTC3851-1
5
38511f
TYPICAL PERFORMANCE CHARACTERISTICS
Load Step
(Burst Mode Operation)
Load Step
(Forced Continuous Mode)
Load Step
(Pulse skip Mode)
Inductor Current at Light Load
Start-Up with Prebiased Output
at 2V
Coincident Tracking with Master
Supply
Ratiometric Tracking with Master
Supply
Input DC Supply Current vs Input
Voltage
Efciency and Power Loss vs
Input Voltage
INPUT VOLTAGE (V)
4
70
EFFICIENCY
(%)
POWER
LOSS
(mW)
75
85
90
95
12
20
24
32
38511 G04
80
816
28
100
1000
10000
VIN = 12V
VOUT = 3.3V
FIGURE 11 CIRCUIT
POWER LOSS,
IOUT = 5A
POWER LOSS,
IOUT = 0.5A
EFFICIENCY,
IOUT = 0.5A
EFFICIENCY,
IOUT = 5A
ILOAD
5A/DIV
0.2A TO 7.5A
VOUT
100mV/DIV
AC COUPLED
IL
5A/DIV
100μs/DIV
VOUT = 1.5V
VIN = 12V
FIGURE 11 CIRCUIT
38511 G05
ILOAD
5A/DIV
0.2A TO 7.5A
VOUT
100mV/DIV
AC COUPLED
IL
5A/DIV
100μs/DIV
VOUT = 1.5V
VIN = 12V
FIGURE 11 CIRCUIT
38511 G06
ILOAD
5A/DIV
0.2A TO 7.5A
VOUT
100mV/DIV
AC COUPLED
IL
5A/DIV
100μs/DIV
VOUT = 1.5V
VIN = 12V
FIGURE 11 CIRCUIT
3851 G07
FORCED
CONTINOUS
MODE
5A/DIV
PULSE SKIP
MODE
5A/DIV
Burst Mode
OPERATION
5A/DIV
1μs/DIV
VOUT = 1.5V
VIN = 12V
ILOAD = 1mA
FIGURE 11 CIRCUIT
38511 G08
VOUT
2V/DIV
VFB
0.5V/DIV
20ms/DIV
38511 G09
TK/SS
0.5V/DIV
10ms/DIV
38511 G10
VMASTER
0.5V/DIV
VOUT
2A LOAD
0.5V/DIV
VMASTER
0.5V/DIV
VOUT
2A LOAD
0.5V/DIV
10ms/DIV
38511 G11
INPUT VOLTAGE (V)
4
SUPPL
Y
CURRENT
(mA)
12
20
24
40
38511 G12
816
28
32
36
3.0
2.5
2.0
1.5
1.0
0.5
0
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