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参数资料
| 型号： | LTC3410BESC6-1.8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.8V .3A SC70-6 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.8V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 300mA |
| 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-TSSOP，SC-88，SOT-363 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SC-70-6 |
LTC3410B
APPLICATIO S I FOR ATIO
Design Example
As a design example, assume the LTC3410B is used in a
single lithium-ion battery-powered cellular phone
application. The V IN will be operating from a maximum of
4.2V down to about 2.7V. The load current requirement
is a maximum of 0.3A but most of the time it will be in
standby mode, requiring only 2mA. Efficiency at both low
and high load currents is important. Output voltage is
2.5V. With this information we can calculate L using
For best efficiency choose a 300mA or greater inductor
with less than 0.3 ? series resistance.
C IN will require an RMS current rating of at least 0.125A ?
I LOAD(MAX) /2 at temperature and C OUT will require an ESR
of less than 0.5 ? . In most cases, a ceramic capacitor will
satisfy this requirement.
For the feedback resistors, choose R1 = 412k. R2 can
then be calculated from equation (2) to be:
L =
V OUT ? 1 ? OUT ?
R 2 = ? OUT ? 1 ? R 1 = 875 . 5 k ; use 8 87k
Equation (1),
1
( f ) ( ? I L )
? V ?
? V IN ?
(3)
? V ?
? 0 . 8 ?
Figure 6 shows the complete circuit along with its
efficiency curve.
Substituting V OUT = 2.5V, V IN = 4.2V, ? I L = 100mA
and f = 2.25MHz in Equation (3) gives:
? 1 ?
? = 4 . 5 μ H
L =
2 . 5 V ?
2 . 25 MHz ( 100 mA ) ?
2 . 5 V ?
4 . 2 V ?
C IN
V IN
2.7V
TO 4.2V
?
2.2 μ F
CER
4
1
V IN SW
LTC3410B
RUN
V FB
3
6
4.7 μ H*
10pF
V OUT
2.5V
C OUT ?
2.2 μ F
CER
TAIYO YUDEN JMK212BJ225
GND
2, 5
887k
412k
?
*MURATA LQH32CN4R7M23
3410 F07a
Figure 6a
100
90
80
70
60
50
40
30
V OUT
100mV/DIV
AC COUPLED
I L
200mA/DIV
I LOAD
200mA/DIV
20
10
V IN = 2.7V
V IN = 3.6V
V IN = 3.6V
4 μ s/DIV
3410 F07c
0
1
10 100
V IN = 4.2V
1000
V OUT = 2.5V
I LOAD = 100mA TO 300mA
OUTPUT CURRENT (mA)
3410 F07b
Figure 6b
Figure 6c
3410bfa
13
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相关代理商/技术参数 |
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|---|---|
| LTC3410ESC6 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 6-Pin SC-70 |
| LTC3410ESC6#PBF | 制造商:Linear Technology 功能描述:BUCK SYNCH 0.3A 2.25MHZ 6S 制造商:Linear Technology 功能描述:BUCK, SYNCH, 0.3A, 2.25MHZ, 6SC70 |
| LTC3410ESC6#TRMPBF | 功能描述:IC REG BUCK SYNC ADJ 0.3A SC70-6 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: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 |
| LTC3410ESC6#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.3A SC70-6 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: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 |
| LTC3410ESC6-1.2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 300mA Synchronous Step-Down Regulator in SC70 |
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