- 您现在的位置：买卖IC网 > PDF目录1830 > LTC3562EUD#TRPBF (Linear Technology)IC REG BUCK SYNC ADJ QUAD 20QFN PDF资料下载
参数资料
| 型号： | LTC3562EUD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ QUAD 20QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 4 |
| 输出电压： | 425 mV ~ 800 mV，0.6 V ~ 3.78 V |
| 输入电压： | 2.85 V ~ 5.5 V |
| PWM 型： | 多重 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 400mA，600mA |
| 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： | 20-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-QFN 裸露焊盘（3x3） |
LTC3562
APPLICATIONS INFORMATION
Inductor Selection
Many different sizes and shapes of inductors are avail-
able from numerous manufacturers. Choosing the right
inductor from such a large selection of devices can be
overwhelming, but following a few basic guidelines will
make the selection process much simpler.
Table 7 shows several inductors that work well with the
LTC3562’s general purpose regulators. These inductors of-
fer a good compromise in current rating, DCR and physical
size. Consult each manufacturer for detailed information
on their entire selection of inductors.
Table 7. Recommended Inducto rs
The step-down converters are designed to work with induc-
tors in the range of 2.2μH to 10μH. For most applications a
4.7μH inductor is suggested for the lower power switching
regulators R400A and R400B and 3.3μH is recommended
for the more powerful switching regulators R600A and
R600B. Larger value inductors reduce ripple current which
INDUCTOR
TYPE
DB318C
D312C
DE2812C
L
( μ H)
4.7
3.3
4.7
3.3
4.7
MAX
I DC
(A)
1.07
1.20
0.79
0.90
1.15
MAX
DCR
( Ω )
0.1
0.07
0.24
0.20
0.13*
SIZE
(mm)
(L × W × H)
3.8 × 3.8 × 1.8
3.8 × 3.8 × 1.8
3.6 × 3.6 × 1.2
3.6 × 3.6 × 1.2
3.0 × 2.8 × 1.2
MANUFACTURER
Toko
www.toko.com
improves output ripple voltage. Lower value inductors
result in higher ripple current and improved transient re-
sponse time, but will reduce the available output current.
To maximize ef?ciency, choose an inductor with a low DC
resistance. For a 1.2V output, ef?ciency is reduced about
2% for 100m Ω series resist-ance at 400mA load current,
3.3
DE2818C 4.7
3.3
CDRH3D16 4.7
3.3
CDRH2D11 4.7
3.3
CLS4D09 4.7
1.37
1.25
1.45
0.9
1.1
0.5
0.6
0.75
0.105*
0.072*
0.052*
0.11
0.085
0.17
0.123
0.19
3.0 × 2.8 × 1.2
3.0 × 2.8 × 1.8
3.0 × 2.8 × 1.8
4 × 4 × 1.8
4 × 4 × 1.8
3.2 × 3.2 × 1.2
3.2 × 3.2 × 1.2
4.9 × 4.9 × 1
Sumida
www.sumida.com
and about 2% for 300m Ω series resistance at 100mA load
SD3118
4.7
1.3
0.162
3.1 × 3.1 × 1.8
Cooper
current. Choose an inductor with a DC current rating at
least 1.5 times larger than the maximum load current to
ensure that the inductor does not saturate during normal
operation. If output short circuit is a possible condition,
the inductor should be rated to handle the maximum peak
SD3112
SD12
SD10
3.3
4.7
3.3
4.7
3.3
4.7
3.3
1.59
0.8
0.97
1.29
1.42
1.08
1.31
0.113
0.246
0.165
0.117*
0.104*
0.153*
0.108*
3.1 × 3.1 × 1.8 www.cooperet.com
3.1 × 3.1 × 1.2
3.1 × 3.1 × 1.2
5.2 × 5.2 × 1.2
5.2 × 5.2 × 1.2
5.2 × 5.2 × 1.0
5.2 × 5.2 × 1.0
current speci?ed for the step-down converters.
LPS3015
4.7
1.1
0.2
3.0 × 3.0 × 1.5
Coil Craft
Different core materials and shapes will change the size/cur-
rent and price/current relationship of an inductor. Toroid
3.3
* Typical DCR
1.3
0.13
3.0 × 3.0 × 1.5 www.coilcraft.com
or shielded pot cores in ferrite or Permalloy? materials
are small and do not radiate much energy, but generally
cost more than powdered iron core inductors with similar
electrical characteristics. Inductors that are very thin or
have a very small volume typically have much higher core
and DCR losses, and will not give the best ef?ciency. The
choice of which style inductor to use often depends more
on the price versus size, performance, and any radiated
EMI requirements than on what the LTC3562 requires to
operate.
The inductor value also has an effect on Burst Mode and
forced Burst Mode operations. Lower inductor values will
cause the Burst Mode and forced Burst Mode switching
frequencies to increase.
Input/Output Capacitor Selection
Low ESR (equivalent series resistance) ceramic capacitors
should be used at the switching regulator outputs as well
as the input supply. Only X5R or X7R ceramic capacitors
should be used because they retain their capacitance
over wider voltage and temperature ranges than other
ceramic types. A 10μF output capacitor is suf?cient for
most applications. For good transient response and sta-
bility the output capacitor should retain at least 4μF of
capacitance over operating temperature and bias voltage.
The input supply should be bypassed with a 10μF capaci-
tor, or greater. Consult with capacitor manufacturers for
detailed information on their selection and speci?cations
of ceramic capacitors. Many manufacturers now offer
3562fa
16
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3563EDC#TRPBF | IC REG BUCK SYNC 0.5A 6DFN |
| LTC3564IS5#TRPBF | IC REG BUCK SYNC ADJ TSOT23-5 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3563 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage |
| LTC3563EDC | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage |
| LTC3563EDC#TRMPBF | 功能描述:IC REG BUCK SYNC 0.5A 6DFN 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
| LTC3563EDC#TRPBF | 功能描述:IC REG BUCK SYNC 0.5A 6DFN 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
| LTC3564 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 1.25A Synchronous Step-Down Regulator |
发布紧急采购，3分钟左右您将得到回复。