參數(shù)資料
型號(hào)： LTC1530IS8-2.5#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù)： 5/24頁(yè)
文件大?。?/td> 301K
代理商： LTC1530IS8-2.5#PBF
13
LTC1530
1530fa
where L is the inductor value in
H. With proper frequency
compensation, the combination of the inductor and output
capacitor values determine the transient recovery time. In
general, a smaller value inductor improves transient
response at the expense of ripple and inductor core
saturation rating. A 2
H inductor has a 0.9A/s rise time
in this application, resulting in a 5.5
s delay in responding
to a 5A load current step. During this 5.5
s, the difference
between the inductor current and the output current is
made up by the output capacitor. This action causes a
temporary voltage droop at the output. To minimize this
effect, the inductor value should usually be in the 1
H to
5
H range for most 5V input LTC1530 circuits. Different
combinations of input and output voltages and expected
loads may require different values.
Once the required inductor value is selected, choose the
inductor core type based on peak current and efficiency
requirements. Peak current in the inductor is equal to the
maximum output load current plus half of the peak-to-
peak inductor ripple current. Inductor ripple current is set
by the inductor’s value, the input voltage, the output
voltage and the operating frequency. If the efficiency is
high, ripple current is approximately equal to:
I
VV
V
fL
V
RIPPLE
IN
OUT
OSC
O
IN
=
()( )
()( )( )
where
fOSC = LTC1530 oscillator frequency
LO = Inductor value
Solving this equation for a typical 5V to 2.8V application
with a 2
H inductor, ripple current is:
22
056
300
2
..
V
kHz
H
A
()( )
=
P-P
Peak inductor current at 11.2A load:
11 2
2
12 2
..
A
+=
The ripple current should generally fall between 10% and
40% of the output current. The inductor must be able to
withstand this peak current without saturating, and the
copper resistance in the winding should be kept as low as
possible to minimize resistive power loss. Note that in
APPLICATIO S I FOR ATIO
WU
UU
RDS(ON)
TYPICAL INPUT
AT 25
°C
RATED CURRENT
CAPACITANCE
θθθθθJC
TJMAX
MANUFACTURER
PART NO.
PACKAGE
(
)
(A)
Ciss (pF)
(
°C/W)
(
°C)
Siliconix
SUD50N03-10
TO-252
0.019
15A at 25
°C
3200
1.8
175
10A at 100
°C
Siliconix
Si4410DY
SO-8
0.020
10A at 25
°C
2700
—
150
8A at 75
°C
ON Semiconductor
MTD20N03HDL
DPAK
0.035
20A at 25
°C
880
1.67
150
16A at 100
°C
Fairchild
FDS6680
SO-8
0.01
11.5A at 25
°C
2070
25
150
ON Semiconductor
MTB75N03HDL*
D2PAK
0.0075
75A at 25
°C
4025
1.0
150
59A at 100
°C
IR
IRL3103S
D2PAK
0.014
56A at 25
°C
1600
1.8
175
40A at 100
°C
IR
IRLZ44
TO-220
0.028
50A at 25
°C
3300
1.0
175
36A at 100
°C
Fuji
2SK1388
TO-220
0.037
35A at 25
°C
1750
2.08
150
Note: Please refer to the manufacturer’s data sheet for testing conditions and detailed information.
*Users must consider the power dissipation and thermal effects in the LTC1530 if driving external MOSFETs with high values of input capacitance.
Refer to the PVCC Supply Current vs GATE Capacitance in the Typical Performance Characteristics section.
Table 1. Recommended MOSFETs for LTC1530 Applications
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1530IS8-3.3 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC1530IS8-3.3#PBF 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC1530IS8-3.3#TR 功能描述:IC SW REG CTRLR SYNC HIPWR 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC1530IS8-3.3#TRPBF 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件
LTC1530IS8PBF 制造商:Linear Technology 功能描述:DC-DC Controller Sync Buck 3.5-7V SOIC8
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