LTC1514 Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator
The LTC®1514-3.3/LTC1514-5 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 fixed at either 3.3V (LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor divider. 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 uncommitted comparator is kept active in shutdown. The comparator has an open-drain output for flexible interfacing. The parts are short-circuit and overtemperature protected. Battery life is maximized by very low operating currents (ICC= 60µA typ, 10µA in shutdown). Both parts are available in an SO-8 package
产品特点 Features
- 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
- Low Shutdown Current: 10µA
- Shutdown Disconnects Load from VIN
- Short-Circuit and Overtemperature Protected
- 650kHz Switching Frequency
- Low-Battery Comparator Active in Shutdown
- Available in SO-8 Package
|
应用
- Battery Operated Equipment
- Smart Card Readers
- Local Power Supplies
- Handheld Instruments
- Battery Backup Supplies
典型应用图
参数
 |
LTC1514 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) * |
| LTC1514CS8-3.3 |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1514CS8-3.3#PBF |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1514CS8-3.3#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1514CS8-3.3#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1514CS8-5 |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1514CS8-5#PBF |
SO |
8 |
C |
$4.35 |
$3.50 |
| LTC1514CS8-5#TR |
SO |
8 |
C |
|
$3.56 |
| LTC1514CS8-5#TRPBF |
SO |
8 |
C |
|
$3.56 |
| LTC1514IS8-3.3 |
SO |
8 |
I |
$5.25 |
$3.50 |
| LTC1514IS8-3.3#PBF |
SO |
8 |
I |
$5.25 |
$3.50 |
| LTC1514IS8-3.3#TR |
SO |
8 |
I |
|
$3.56 |
| LTC1514IS8-3.3#TRPBF |
SO |
8 |
I |
|
$3.56 |
| LTC1514IS8-5 |
SO |
8 |
I |
$5.25 |
$3.50 |
| LTC1514IS8-5#PBF |
SO |
8 |
I |
$5.25 |
$3.50 |
| LTC1514IS8-5#TR |
SO |
8 |
I |
|
$3.56 |
| LTC1514IS8-5#TRPBF |
SO |
8 |
I |
|
$3.56 |
LTC1514 数据手册及相关资料下载
- 数据手册(英文) : LTC1514-3.3/LTC1514-5 - Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator.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
