- 您现在的位置：买卖IC网 > PDF目录98002 > LT1307IS8#TR (LINEAR TECHNOLOGY CORP) 1.25 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | LT1307IS8#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 6/20页 |
| 文件大小： | 369K |
| 代理商： | LT1307IS8#TR |
14
LT1307/LT1307B
1307fa
REVERSE BATTERY CONSIDERATIONS
The LT1307 is built on a junction-isolated bipolar process.
The p-type substrate is connected to the GND pin of the
LT1307. Substrate diodes, normally reverse-biased, are
present on the SW pin and the VIN pin as shown in Figure
16. When the battery polarity is reversed, these diodes
conduct, as illustrated in Figure 17. With a single AA or
AAA cell, several hundred milliamperes flow in the circuit.
The LT1307 can withstand this current without damage. In
laboratory tests, the LT1307 performed without degrada-
tion after sustaining polarity reversal for the life of a single
AA alkaline cell.
When using a 2- or 3-cell supply, an external protection
diode is recommended as shown in Figure 18. When the
battery polarity is reversed, the 1N4001 conducts, limiting
reverse voltage across the LT1307 to a single diode drop.
This arrangement will quickly deplete the cells’ energy, but
it does prevent the LT1307 from excessive power dissipa-
tion and potential damage.
Figure 18. 1N4001 Diode Protects LT1307 from Excessive Power
Dissipation When a 2- or 3-Cell Battery is Used
VIN
SW
LT1307
1N4001
1307 F18
2 OR 3
CELLS
GND
VIN
LT1307
1307 F16
GND
1 CELL
1.5V
D2
SW
D1
Q1
Figure 16. LT1307 Showing Internal Substrate Diodes D1 and D2.
In Normal Operation Diodes are Reverse-Biased
VIN
LT1307
CURRENT
FLOW
1307 F17
GND
1 CELL
– 1.5V
D2
SW
D1
Q1
Figure 17. When Cell Is Reversed Current Flows through
D1 and D2
APPLICATIO S I FOR ATIO
WU
UU
相关PDF资料 |
PDF描述 |
|---|---|
| LT1508ISW#TR | POWER FACTOR CONTROLLER WITH POST REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO20 |
| LT1513IT7-2#PBF | 5.4 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PSFM7 |
| LT1513IR-2#PBF | 5.4 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PSSO7 |
| LT1640LCS8#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| LT1932ES6#PBF | 0.78 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1308 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Single Cell High Current Micropower 600kHz Boost DC/DC Converter |
| LT1308A | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308A_1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308ACF | 功能描述:IC REG BOOST 5V 1A 14TSSOP 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:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| LT1308ACF#PBF | 功能描述:IC REG BOOST 5V 1A 14TSSOP 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:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
发布紧急采购，3分钟左右您将得到回复。