參數(shù)資料
型號： LT3579IUFD-1#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PQCC20
封裝： 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-20
文件頁數(shù)： 24/40頁
文件大小： 503K
代理商： LT3579IUFD-1#TRPBF
LT3579/LT3579-1
30
35791f
appenDix
The current mode zero (Z3) is a right half plane zero
which can be an issue in feedback control design, but is
manageable with proper external component selection.
Using the circuit in Figure 20 as an example, Table 8 shows
the parameters used to generate the Bode plot shown in
Figure 19.
Table 8. Bode Plot Parameters
PARAMETER
VALUE
UNITS
COMMENT
RL
7
Ω
Application Specific
COUT
30
F
Application Specific
RESR
2
mΩ
Application Specific
R0
305
kΩ
Not Adjustable
CC
2200
pF
Adjustable
CF
47
pF
Optional/Adjustable
CPL
0
pF
Optional/Adjustable
RC
8
kΩ
Adjustable
R1
130
kΩ
Adjustable
R2
14.6
kΩ
Not Adjustable
VOUT
12
V
Application Specific
VIN
5
V
Application Specific
gma
250
mho
Not Adjustable
gmp
28
mho
Not Adjustable
L
2.2
H
Application Specific
fOSC
1.0
MHz
Adjustable
From Figure 19, the phase is –134° when the gain reaches
0dBgivingaphasemarginof46°.Thecrossoverfrequency
is 8kHz, which is more than three times lower than the
frequency of the RHP zero Z3 to achieve adequate phase
margin.
Figure 19. Bode Plot for Example Boost Converter
Figure 20. 5V to 12V Boost Converter
FREQUENCY (Hz)
10
–20
GAIN
(dB)
PHASE
(DEG)
60
80
100
120
40
20
0
140
–360
–315
–180
–135
–90
–45
–225
–270
0
100
10k
100k
1M
35791 F19
1k
PHASE
GAIN
46° AT
8kHz
VOUT
12V
1.7A
COUT
10F
×3
L1
2.2H
D1
VIN
5V
VIN
SW1 SW2
35791 F20
LT3579
86.6k
8k
130k
100k
SHDN
FAULT
FB
GATE
CLKOUT
VC
SYNC GND
SS
RT
2.2nF
0.1F
47pF
CIN
22F
相關PDF資料
PDF描述
LT3579IFE#PBF SWITCHING REGULATOR, PDSO20
LT3579IFE-1#TRPBF SWITCHING REGULATOR, PDSO20
LT3579EUFD-1#TRPBF SWITCHING REGULATOR, PQCC20
LT3579IUFD-1#PBF SWITCHING REGULATOR, PQCC20
LT3579IFE#TRPBF SWITCHING REGULATOR, PDSO20
相關代理商/技術參數(shù)
參數(shù)描述
LT3579IUFD-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection
LT3579IUFD-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection
LT3580 制造商:LINER 制造商全稱:Linear Technology 功能描述:Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization
LT3580EDD 制造商:LINER 制造商全稱:Linear Technology 功能描述:Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization
LT3580EDD#PBF 功能描述:IC REG BOOST INV SEPIC 2A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
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