- 您现在的位置：买卖IC网 > PDF目录1830 > LTC3564IS5#TRPBF (Linear Technology)IC REG BUCK SYNC ADJ TSOT23-5 PDF资料下载
参数资料
| 型号： | LTC3564IS5#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ TSOT23-5 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 1.25A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-5 |
LTC3564
APPLICATIO S I FOR ATIO
V IN
C IN
V IN SW
LTC3564
RUN V FB
R1
L
C F
R2
V OUT
C OUT
3564 F01
The DC current rating of the inductor should be at least
equal to the maximum load current plus half the ripple
current to prevent core saturation. Thus, a 1.5A rated
inductor should be enough for most applications (1.25A
+ 250mA). For better efficiency, choose a low DC-resis-
GND
Figure 1. LTC3564 General Schematic
The basic LTC3564 application circuit is shown in Figure 1.
External component selection is driven by the load require-
ment and begins with the selection of L followed by C IN and
C OUT .
Inductor Selection
For most applications, the value of the inductor will fall in
the range of 0.47 μ H to 2.2 μ H. Its value is chosen based on
the desired ripple current. Large value inductors lower
ripple current and small value inductors result in higher
ripple currents. Higher V IN or V OUT also increases the ripple
current as shown in equation 1. A reasonable starting point
for setting ripple current is Δ I L = 500mA (40% of 1.25A).
tance inductor.
The inductor value also has an effect on Burst Mode
operation. The transition to low current operation begins
when the inductor current peaks fall to approximately
300mA. Lower inductor values (higher Δ I L ) will cause this
to occur at lower load currents, which can cause a dip in
efficiency in the upper range of low current operation. In
Burst Mode operation, lower inductance values will cause
the burst frequency to increase.
Inductor Core Selection
Different core materials and shapes will change the size/
current and price/current relationship of an inductor.
Toroid or shielded pot cores in ferrite or permalloy mate-
rials are small and don’t radiate much energy, but gener-
ally cost more than powdered iron core inductors with
similar electrical characteristics. The choice of which style
V OUT ? 1 ? OUT ?
Δ I L =
1
( f )( L )
? V ?
? V IN ?
(1)
inductor to use often depends more on the price vs size
requirements and any radiated field/EMI requirements
than on what the LTC3564 requires to operate. Table 1
shows some typical surface mount inductors that work
well in LTC3564 applications.
Table 1. Representative Surface Mount Inductors
MANUFATURER
Toko
Sumida
FDK
Coilcraft
Vishay
PART NUMBER
A915AY-1R1M-DC53LC
1070AS-1R0N-DB3020C
CDRH4D18C/LD-1R1
CDRH3D14-1R2
CR5D11-1R0
CDRH2D18/HP-2R2
MIPW3226D0R9M
LPO6610-122ML
LPS4018-222ML
IHLP1616ABERR47M01
IHLP1616ABER1R0M01
VALUE ( μ H)
1.1
1
1.1
1.2
1
2.2
0.9
1.2
2.2
0.47
1
MAX DC CURRENT (A)
3.25
1.9
2.1
2.2
2.2
1.6
1.4
2.1
2.5
5
4
DCR ( m Ω )
16
47
24
36
40
48
70
80
70
20
45
HEIGHT (mm)
3
2
2
1.5
1.2
2
1
1
1.8
1.2
1.2
3564f
9
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3565IMSE#TRPBF | IC REG BUCK SYNC ADJ 10MSOP |
| LTC3568IDD#TRPBF | IC REG BUCK SYNC ADJ 1.8A 10DFN |
| LTC3569IFE#TRPBF | IC REG BUCK SYNC ADJ 16TSSOP |
| LTC3600EMSE#PBF | IC REG BUCK SYNC ADJ 1.5A 12MSOP |
| LTC3601IUD#TRPBF | IC REG BUCK SYNC ADJ 1.5A 16QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3565 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3565_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3565_12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3565EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
| LTC3565EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.25A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
发布紧急采购，3分钟左右您将得到回复。