参数资料
| 型号： | LT1936HMS8E#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.4A 8MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.2 V ~ 31.3 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 1.4A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP-EP |
LT1936
APPLICATIONS INFORMATION
Minimum Input Voltage V OUT = 3.3V
Minimum Input Voltage V OUT = 5V
6.0
5.5
5.0
V OUT = 3.3V
T A = 25°C
L = 10μH
TO START
8
7
V OUT = 5V
T A = 25°C
L = 15μH
TO START
4.5
4.0
6
TO RUN
3.5
TO RUN
5
3.0
0
10
100
1000
4
1
10 100
1000
LOAD CURRENT (mA)
1936 F04a
LOAD CURRENT (mA)
1936 F04b
Figure 4. The Minimum Input Voltage Depends on Output Voltage, Load Current and Boost Circuit
RUN
5V/DIV
RUN
SHDN
I IN
500mA/DIV
GND
V OUT
5V/DIV
50μs/DIV
1936 F05a
RUN
15k
SHDN
RUN
5V/DIV
I IN
500mA/DIV
0.22μF
GND
V OUT
5V/DIV
0.5ms/DIV
1936 F05b
Figure 5. To Soft-Start the LT1936, Add a Resistor and Capacitor to the SHDN Pin.
V IN = 12V, V OUT = 3.3V, C OUT = 2 × 22μF, R LOAD = 3.3 Ω
RC time constant, the peak start-up current can be reduced
to the current that is required to regulate the output, with
no overshoot. Choose the value of the resistor so that it
can supply 60μA when the SHDN pin reaches 2.3V.
Shorted and Reversed Input Protection
If the inductor is chosen so that it won’t saturate exces-
sively, an LT1936 buck regulator will tolerate a shorted
output. There is another situation to consider in systems
where the output will be held high when the input to the
LT1936 is absent. This may occur in battery charging ap-
plications or in battery backup systems where a battery
or some other supply is diode OR-ed with the LT1936’s
output. If the V IN pin is allowed to ?oat and the SHDN pin
is held high (either by a logic signal or because it is tied
to V IN ), then the LT1936’s internal circuitry will pull its
quiescent current through its SW pin. This is ?ne if your
system can tolerate a few mA in this state. If you ground
1936fd
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1936IMS8E | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 3.6V to 36V 8-Pin MSOP EP |
| LT1936IMS8E#PBF | 功能描述:IC REG BUCK ADJ 1.4A 8MSOP 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1936IMS8E#TRPBF | 功能描述:IC REG BUCK ADJ 1.4A 8MSOP 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1936IMS8EPBF | 制造商:Linear Technology 功能描述:Switching Regulator 1.4A 500kHz MSOP8EP |
| LT1936IMS8E-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.4A, 500kHz Step-Down Switching Regulator |
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