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| 型号： | LT3467AEDDB#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件页数： | 16/18页 |
| 文件大小： | 266K |
| 代理商： | LT3467AEDDB#PBF |
LT3467/LT3467A
7
3467afe
APPLICATIONS INFORMATION
GND
VIN
SW
SS
FB
VIN
2.6V TO 4.2V
D1
L1
2.7μH
R1
402k
LT3467
3467 TA05a
C2
15μF
C4
3.3pF
C1
4.7μF
R2
133k
VOUT
5V
765mA AT VIN = 4.2V,
540mA AT VIN = 3.3V,
360mA AT VIN = 2.6V
C1, C2: X5R OR X7R, 6.3V
D1: ON SEMICONDUCTOR MBRM120
L1: SUMIDA CR43-2R7
SHDN
OFF ON
C3
0.047μF
Figure 2. Single Li-Ion Cell to 5V Boost Converter (Same as 1st Page Application)
Table 1. Inductor Manufacturers
Sumida
(847) 956-0666
www.sumida.com
TDK
(847) 803-6100
www.tdk.com
Murata
(714) 852-2001
www.murata.com
FDK
(408) 432-8331
www.fdk.co.jp
Soft-Start
The soft-start feature provides a way to limit the inrush
current drawn from the supply upon start-up. An internal
250k resistor charges the external soft-start capacitor
to 1.255V. After the capacitor reaches 0.15V the rate of
voltage rise at the output of the comparator A1 tracks the
rate of voltage rise of the soft-start capacitor. This limits
the inrush current drawn from the supply during start-
up. The soft-start feature plays another important role in
applications where the switch will reach levels of 30V or
higher. During start-up, excessively high switch current,
together with the presence of high voltage can overstress
the switch. A properly used soft-start feature will keep the
switch current from overshooting. This practice will greatly
improve the robustness of such designs. Once the part is
shut down, the soft-start capacitor is quickly discharged
to 0.4V, then slowly discharged through the 250k resistor
to ground. If the part is to be shut down and re-enabled in
a short period of time while soft-start is used, you must
ensure that the soft-start capacitor has enough time to
discharge before re-enabling the part. Typical values of
the soft-start capacitor range from 10nF to 200nF.
Supply Current of Figure 2 During Start-Up
Without Soft-Start Capacitor
VOUT
1V/DIV
ISUPPLY
0.5A/DIV
0.1ms/DIV
3467 AI01
Supply Current of Figure 2 During Start-Up
with a 47nF Soft-Start Capacitor
VOUT
1V/DIV
ISUPPLY
0.5A/DIV
0.5ms/DIV
3467 AI02
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相关代理商/技术参数 |
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| LT3467AES6 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.2V to 16V 6-Pin TSOT-23 |
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| LT3467AES6#TR | 功能描述:IC REG BOOST ADJ 1.1A TSOT23-6 RoHS:否 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 |
| LT3467AES6#TRM | 功能描述:IC REG BOOST ADJ 1.1A TSOT23-6 RoHS:否 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 |
| LT3467AES6#TRMPBF | 功能描述:IC REG BOOST ADJ 1.1A 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 |
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