LTC1515 Step-Up/Step-Down Switched Capacitor DC/DC Converters with RESET
The LTC®1515, LTC1515-3/5 and LTC1515-3.3/5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is adjustable using an external resistor divider (LTC1515) or programmable to either 3V/5V (LTC1515-3/5) or 3.3V/5V (LTC1515-3.3/5) using a logic pin. A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining ±4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large VIN to VOUT differentials are present. An internal power-on reset circuit forces the POR pin low on initial power-up. The POR output remains low until 200ms (typ) after VOUT is in regulation. The parts are short-circuit and overtemperature protected. Battery life is maximized by very low operating currents (ICC = 60µA typ, ICC<1µA in shutdown). All three parts are available in an SO-8 package
产品特点 Features
- Adjustable/Selectable 3V, 3.3V or 5V Output Voltages
- 2V to 10V Input Voltage Range
- Up to 50mA Output Current
- Only Three External Capacitors Required
- Soft Start Limits Inrush Current at Turn-On
- Low Operating Current: 60µA
- Very Low Shutdown Current: < 1µA
- Shutdown Disconnects Load from VIN
- VOUT Programmable to 3V/5V or 3.3V/5V
- Short-Circuit and Overtemperature Protected
- 650kHz Switching Frequency
- Open-Drain Power-On Reset Output
- Available in SO-8 Package
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应用
- SIM Interface in GSM Cellular Telephones
- Smart Card Readers
- Local Power Supplies
- Portable Equipment
典型应用图
参数
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LTC1515 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC1515CS8 |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8#PBF |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1515CS8#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1515CS8-3.3/5 |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8-3.3/5#PBF |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8-3.3/5#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1515CS8-3.3/5#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1515CS8-3/5 |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8-3/5#PBF |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1515CS8-3/5#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1515CS8-3/5#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1515IS8 |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8#PBF |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8#TR |
SO |
8 |
I |
|
$4.26 |
| LTC1515IS8#TRPBF |
SO |
8 |
I |
|
$4.26 |
| LTC1515IS8-3.3/5 |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8-3.3/5#PBF |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8-3.3/5#TR |
SO |
8 |
I |
|
$4.26 |
| LTC1515IS8-3.3/5#TRPBF |
SO |
8 |
I |
|
$4.26 |
| LTC1515IS8-3/5 |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8-3/5#PBF |
SO |
8 |
I |
$5.25 |
$4.20 |
| LTC1515IS8-3/5#TR |
SO |
8 |
I |
|
$4.26 |
| LTC1515IS8-3/5#TRPBF |
SO |
8 |
I |
|
$4.26 |
LTC1515 数据手册及相关资料下载
- 数据手册(英文) : LTC1515 Series - Step-Up/Step-Down Switched Capacitor DC/DC Converters with RESET.PDF
- 应用指南 (英文) : AN84 - linear Technology Magazine Circuit Collection, Volume IV .PDF
- 设计要点 (英文) : DN189 - Step-Up/Step-Down DC/DC Conversion Without Inductors.PDF
- 可靠性数据 : R368 Reliability Data .PDF
