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| 型号： | LT3467AES6#TR |
| 厂商： | Linear Technology |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1.1A TSOT23-6 |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.26 V ~ 40 V |
| 输入电压： | 2.4 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.1MHz |
| 电流 - 输出： | 1.1A |
| 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 |
LT3467/LT3467A
APPLICATIONS INFORMATION
V IN
2.6V TO 4.2V
C1
4.7μF
OFF ON
L1
2.7μH
V IN
SHDN
LT3467
SW
D1
R1
402k
C4
3.3pF
V OUT
5V
765mA AT V IN = 4.2V,
540mA AT V IN = 3.3V,
360mA AT V IN = 2.6V
SS
FB
C3
0.047μF
GND
R2
133k
C2
15μF
C1, C2: X5R OR X7R, 6.3V
D1: ON SEMICONDUCTOR MBRM120
3467 TA05a
L1: SUMIDA CR43-2R7
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
Supply Current of Figure 2 During Start-Up
Without Soft-Start Capacitor
TDK
Murata
(847) 803-6100
(714) 852-2001
www.tdk.com
www.murata.com
FDK
(408) 432-8331
www.fdk.co.jp
V OUT
1V/DIV
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
I SUPPLY
0.5A/DIV
voltage rise at the output of the comparator A1 tracks the
rate of voltage rise of the soft-start capacitor. This limits
0.1ms/DIV
3467 AI01
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
Supply Current of Figure 2 During Start-Up
with a 47nF Soft-Start Capacitor
V OUT
1V/DIV
I SUPPLY
0.5A/DIV
a short period of time while soft-start is used, you must
0.5ms/DIV
3467 AI02
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.
3467afe
7
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| LT3467AES6TRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up 2.2-16V TSOT23-6 |
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| LT3467AIS6#PBF | 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, Cut Tape 1.1A, 2.1MHz Boost Converter |
| LT3467AIS6#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: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 |
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