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参数资料
| 型号： | LTC3560ES6 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23 |
| 文件页数： | 15/16页 |
| 文件大小： | 323K |
| 代理商： | LTC3560ES6 |
8
LTC3560
3560f
Slope Compensation and Inductor Peak Current
Slope compensation provides stability in constant fre-
quency architectures by preventing subharmonic oscilla-
tions at high duty cycles. It is accomplished internally by
adding a compensating ramp to the inductor current
signal at duty cycles in excess of 40%. Normally, this
OPERATIO
U
(Refer to Functional Diagram)
results in a reduction of maximum inductor peak current
for duty cycles > 40%. However, the LTC3560 uses a
patented scheme that counteracts this compensating ramp,
which allows the maximum inductor peak current to
remain unaffected throughout all duty cycles.
APPLICATIO S I FOR ATIO
WU
UU
The basic LTC3560 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 CIN and
COUT.
Inductor Selection
For most applications, the value of the inductor will fall in
the range of 1
H to 3.3H. 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 VIN or VOUT also increases the ripple
current as shown in equation 1. A reasonable starting point
for setting ripple current is
IL = 320mA (40% of 800mA).
= ()( )
I
fL
V
L
OUT
IN
1
(1)
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 960mA rated
inductor should be enough for most applications (800mA
+ 160mA). For better efficiency, choose a low DC-resis-
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
200mA. Lower inductor values (higher
IL) 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. Tor-
oid or shielded pot cores in ferrite or permalloy materials
are small and don’t radiate much energy, but generally cost
Table 1. Representative Surface Mount Inductors
MAX DC
MANUFACTURER
PART NUMBER
VALUE CURRENT
DCR
HEIGHT
Toko
A960AW-1R2M-518LC
1.2
H
1.8A
46m
1.8mm
A960AW-2R3M-518LC
2.3
H
1.5A
63m
1.8mm
A997AS-3R3M-DB318L
3.3
H
1.2A
70m
1.8mm
Sumida
CDRH2D11/HP-1R5
1.5
H
1.35A
64m
1.2mm
CDRH3D11/HP-1R5
1.5
H
2A
80m
1.2mm
CDRH2D18/HP-2R2
2.2
H
1.6A
48m
2.0mm
CDRH2D14-3R3
3.3
H
1.2A
100m
1.55mm
TDK
VLF3010AT-1R5M1R2
1.5
H
1.2A
68m
1.0mm
VLF3010AT-2R2M1R0
2.2
H
1.0A
100m
1.0mm
Coilcraft
D01608C-222
2.2
H
2.3A
70m
3.0mm
LP01704-222M
2.2
H
2.4A
120m
1.0mm
Cooper
SD3112-2R2
2.2
H
1.1A
140m
1.2mm
EPCO
B82470A1222M
2.2
H
1.6A
90m
1.2mm
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3560ES6#PBF | 制造商:Linear Technology 功能描述:2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
| LTC3560ES6#TRMPBF | 功能描述:IC REG BUCK SYNC ADJ TSOT23-6 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 |
| LTC3560ES6#TRPBF | 功能描述:IC REG BUCK SYNC ADJ TSOT23-6 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:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC3560ES6LTCFY | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3560ES6PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
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