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参数资料
| 型号： | LTC3203EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SWITCHD CAP ADJ 10DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压），切换电容（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 900kHz，1MHz |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3203/LTC3203-1
LTC3203B/LTC3203B-1
OPERATIO
When the output voltage drops enough to overcome the
burst comparator hysteresis, the part wakes up and com-
mences normal fixed frequency operation. The output
capacitor recharges and causes the part to re-enter the
Sleep state if the output load still remains less than the
Burst Mode threshold. This Burst Mode threshold varies
with V IN , V OUT and the choice of output storage capacitor.
Short-Circuit/Thermal Protection
The LTC3203/LTC3203-1/LTC3203B/LTC3203B-1 have
built-in short-circuit current limit as well as over-tempera-
ture protection. During a short-circuit condition, the chip
will automatically limit the output current to approximately
1A. At higher temperatures, or if the input voltage is high
enough to cause excessive self-heating of the part, the
thermal shutdown circuitry will shut down the charge
pump once the junction temperature exceeds approxi-
mately 150 ° C. It will enable the charge pump once the
junction temperature drops back to approximately 135 ° C.
The LTC3203/LTC3203-1/LTC3203B/LTC3203B-1 will
cycle in and out of thermal shutdown indefinitely without
latch-up or damage until the short circuit condition on
V OUT is removed.
Soft-Start
To prevent excessive current flow at V IN during start-up,
the LTC3203/LTC3203-1/LTC3203B/LTC3203B-1 have
built-in soft-start circuitry. Soft-start is achieved by in-
creasing the amount of current available to the output
charge storage capacitor linearly over a period of approxi-
mately 250 μ s.
32031fa
9
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| LTC3204 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Noise Regulated Charge Pump in 2 X 2 DFN |
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