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参数资料
| 型号： | LTC1530IS8-2.5#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 5/24页 |
| 文件大小： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1530IS8-3.3 | 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC1530IS8-3.3#PBF | 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC1530IS8-3.3#TR | 功能描述:IC SW REG CTRLR SYNC HIPWR 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC1530IS8-3.3#TRPBF | 功能描述:IC SW REG CNTRLR SYNC 3.3V 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装: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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