参数资料
型号: LT3467IS5
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: 2.5 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6
封装: 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, 6 PIN
文件页数: 3/16页
文件大小: 245K
代理商: LT3467IS5
11
LT3467/LT3467A
3467afc
APPLICATIONS INFORMATION
WU
U
Figure 7.Bode Plot of 3.3V to 5V Application
FREQUENCY (Hz)
GAIN
(dB)
PHASE
(DEG)
50
40
30
20
10
0
–10
–20
–30
–40
–50
0
–45
–90
–135
–180
–225
–270
–315
–360
–405
–450
100
10k
100k
1M
3467 F07
1k
GAIN
PHASE
Table 3. Bode Plot Parameters
Parameter
Value
Units
Comment
RL
10.4
Ω
Application Specific
COUT
15
μF
Application Specific
RESR
10
m
Ω
Application Specific
RO
0.4
M
Ω
Not Adjustable
CC
60
pF
Not Adjustable
CPL
3.3
pF
Adjustable
RC
100
k
Ω
Not Adjustable
R1
402
k
Ω
Adjustable
R2
133
k
Ω
Adjustable
VOUT
5
V
Application Specific
VIN
3.3
V
Application Specific
gma
35
μmho
Not Adjustable
gmp
7.5
mho
Not Adjustable
L
2.7
μH
Application Specific
fS
1.3*
MHz
Not Adjustable
*2.1MHz for LT3467A
From Figure 7, the phase is –138
° when the gain reaches
0dB giving a phase margin of 42
°. This is more than
adequate. The crossover frequency is 37kHz.
GND
VIN
SW
SHDN
FB
VIN
2.7V
TO 4.2V
D1
L1
2.2
μH
R1
501k
LT3467
3467 TA02
C2
15
μF
C3
1.8pF
C1
2.2
μF
R2
133k
VOUT
6V
275mA AT VIN = 2.7V
490mA AT VIN = 3.8V
590mA AT VIN = 4.2V
C1, C2: X5R OR X7R, 6.3V
D1: ON SEMICONDUCTOR MBRM120
L1: SUMIDA CR43-2R2
SHDN
SS
C4
0.047
μF
Lithium-Ion to 6V Step-Up DC/DC Converter
IOUT (mA)
EFFICIENCY
(%)
200
95
90
85
80
75
70
65
60
55
50
3467 TA02b
100
50
300
400
500
600
700
VIN = 3.8V
VIN = 4.2V
VIN = 2.7V
Li-Ion to 6V
TYPICAL APPLICATIO S
U
Using the circuit of Figure 2 as an example, the following
table shows the parameters used to generate the Bode plot
shown in Figure 7.
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