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参数资料
| 型号： | LT1930ES5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1A TSOT23-5 |
| 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 ~ 34 V |
| 输入电压： | 2.45 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 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-23-5 细型，TSOT-23-5 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-5 |
| 其它名称： | LT1930ES5TR |
LT1930/LT1930A
APPLICATIO N S I N FOR M ATIO N
V OUT
0.2V/DIV
AC COUPLED
I LI
0.5A/DIV
AC COUPLED
LOAD 250mA
LAYOUT HINTS
The high speed operation of the LT1930/LT1930A
demands careful attention to board layout. You will not get
advertised performance with careless layout. Figure 6
shows the recommended component placement.
CURRENT 150mA
200 μ s/DIV
1930 F04
Figure 5. Transient Response of Step-Up Converter with 33 μ F
Tantalum Output Capacitor and No Phase Lead Capacitor
D1
L1
C1
DIODE SELECTION
V OUT
+
V IN
A Schottky diode is recommended for use with the LT1930/
LT1930A. The Motorola MBR0520 is a very good choice.
C2
R2
SHUTDOWN
Where the switch voltage exceeds 20V, use the MBR0530
(a 30V diode). Where the switch voltage exceeds 30V, use
GND
R1
C3
1930 F06
the MBR0540 (a 40V diode). These diodes are rated to
handle an average forward current of 0.5A. In applications
where the average forward current of the diode exceeds
0.5A, a Microsemi UPS5817 rated at 1A is recommended.
SETTING OUTPUT VOLTAGE
To set the output voltage, select the values of R1 and R2
(see Figure 1) according to the following equation.
Figure 6. Suggested Layout
Driving SHDN Above 10V
The maximum voltage allowed on the SHDN pin is 10V. If
you wish to use a higher voltage, you must place a resistor
in series with SHDN. A good value is 121k. Figure 7 shows
a circuit where V IN = 16V and SHDN is obtained from V IN .
The voltage on the SHDN pin is kept below 10V.
R 1 = R 2 ?
– 1 ?
? V OUT
? 1 . 255 V
?
?
A good value for R2 is 13.3k which sets the current in the
resistor divider chain to 1.255V/13.3k = 94.7 μ A.
V IN
16V
C1
121k
5
V IN
L1
1
SW
D1
R1
V OUT
LT1930
4
SHDN
FB
3
C2
GND
R2
2
1930 F07
Figure 7. Keeping SHDN Below 10V
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1930ES5TRMPBF | 制造商:Linear Technology 功能描述:DC/DC Step Up Converter LT1930ES5 |
| LT1931 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT |
| LT1931A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Inverting Micropower DC/DC Converter with Schottky in ThinSOT Package |
| LT1931AES5 | 制造商:Linear Technology 功能描述:2.5 A SWITCHING REGULATOR, 2900 kHz SWITCHING FREQ-MAX, PDSO5 |
| LT1931AES5#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Inv 2.45V to 16V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:IC DC/DC CONVERTER 5-TSOT-23 制造商:Linear Technology 功能描述:IC, DC/DC CONVERTER, 5-TSOT-23 制造商:Linear Technology 功能描述:IC, DC/DC CONVERTER, 5-TSOT-23; Primary Input Voltage:16V; No. of Outputs:1; Output Voltage:-5V; Output Current:300mA; No. of Pins:5; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
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