LTC1522 Micropower, Regulated 5V Charge Pump DC/DC Converter
The LTC®1522 is a micropower charge pump DC/DC converter that produces a regulated 5V output from a 2.7V to 5V input supply. Extremely low supply current (6µA typical with no load, <1µA in shutdown) and low external parts count (one 0.22µF flying capacitor and two 10µF capacitors at VIN and VOUT) make the LTC1522 ideally suited for small, light load battery-powered applications. Typical efficiency (VIN = 3V) exceeds 75% with load currents between 50µA and 20mA. Modulating the SHDN pin keeps the typical efficiency above 75% with load currents all the way down to 10µA. The LTC1522 has thermal shutdown and can survive a continuous short from VOUT to GND. In shutdown the load is disconnected from VIN. The part is available in 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where VIN >/= 2.7V and IOUT </= 20mA
产品特点 Features
- Ultralow Power: Typical Operating ICC = 6µA
- Short-Circuit/Thermal Protected
- Regulated 5V ±4% Output Voltage
- 2.7V to 5V Input Range
- No Inductors
- Very Low ICC in Shutdown: <1µA
- Output Current: 10mA (VIN >/=2.7V) 20mA (VIN >/=3V)
- Shutdown Disconnects Load from VIN
- Internal Oscillator: 700kHz
- Compact Application Circuit (<0.1 in2)
- 8-Pin MSOP and SO Packages
参数
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应用
- SIM Interface Supplies for GSM Cellular Telephones
- Li-Ion Battery Backup Supplies
- Local 3V to 5V Conversion
- Smart Card Readers
- PCMCIA Local 5V Supplies
典型应用图
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LTC1522 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) * |
| LTC1522CMS8 |
MSOP |
8 |
C |
$2.50 |
$1.95 |
| LTC1522CMS8#PBF |
MSOP |
8 |
C |
$2.50 |
$1.95 |
| LTC1522CMS8#TR |
MSOP |
8 |
C |
|
$2.01 |
| LTC1522CMS8#TRPBF |
MSOP |
8 |
C |
|
$2.01 |
| LTC1522CS8 |
SO |
8 |
C |
$2.15 |
$1.75 |
| LTC1522CS8#PBF |
SO |
8 |
C |
$2.15 |
$1.75 |
| LTC1522CS8#TR |
SO |
8 |
C |
|
$1.81 |
| LTC1522CS8#TRPBF |
SO |
8 |
C |
|
$1.81 |
| LTC1522IS8 |
SO |
8 |
I |
$2.30 |
$2.00 |
| LTC1522IS8#PBF |
SO |
8 |
I |
$2.30 |
$2.00 |
| LTC1522IS8#TR |
SO |
8 |
I |
|
$2.06 |
| LTC1522IS8#TRPBF |
SO |
8 |
I |
|
$2.06 |
LTC1522 数据手册及相关资料下载
- 数据手册(英文) : LTC1522 - Micropower, Regulated 5V Charge Pump DC/DC Converter.PDF
- 应用指南 (英文) : AN84 - linear Technology Magazine Circuit Collection, Volume IV .PDF
- 设计要点 (英文) : DN142 - Ultralow Quiescent Current DC/DC Converters for Light Load Applications.PDF
- 可靠性数据 : R302 Reliability Data .PDF
