LTC3035 300mA VLDO linear Regulator with Charge Pump Bias Generator
The LTC®3035 is a micropower, VLDO™ (very low dropout) linear regulator which operates from input voltages as low as 1.7V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. To allow operation at low input voltages the LTC3035 includes a charge pump generator that provides the necessary bias voltage for the internal LDO circuitry. Output current comes directly from the input supply for high efficiency regulation. The charge pump bias generator requires only a 0.1μF flying capacitor and a 1μF bypass capacitor for operation. The low 0.4V internal reference voltage allows the LTC3035 to be programmed to much lower output voltages than commonly available in LDOs. The output voltage is programmed via two tiny SMD resistors. The LTC3035’s low quiescent current makes it an ideal choice for use in battery-powered systems.
Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1μF, short-circuit and thermal overload protection, output current limiting and reverse output current protection. The LTC3035 is available in a tiny, low profile (3mm × 2mm × 0.75mm) 8-lead DFN package
产品特点 Features
- Wide Input Voltage Range: 1.7V to 5.5V
- Wide Adjustable Output Voltage Range: 0.4V to 3.6V
- Built-In Charge Pump Generates High Side Bias
- Very Low Dropout: 45mV at 300mA
- ± 2% Voltage Accuracy Over Temperature, Supply, Load
- Fast Transient Recovery
- Low Operating Current: IIN = 100μA Typ
- Low Shutdown Current: IIN = 1μA Typ
- Stable with Ceramic Capacitor Down to 1μF
- Output Current Limit
- Thermal Overload Protected
- Reverse Output Current Protected
- Available in 8-Lead (3mm × 2mm) DFN Package
参数
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应用
- Li-Ion to 3.3V Low Dropout Supplies
- 2 × AA to 1.8V Low Dropout Supplies
- Low Power Handheld Devices
- Low Voltage Logic Supplies
- DSP Power Supplies
- Cellular Phones
- Portable Electronic Equipment
- Handheld Medical Instruments
- Post Regulator for Switching Supply Noise Rejection
典型应用图
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LTC3035 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) * |
| LTC3035EDDB |
DFN |
8 |
E |
$1.92 |
|
| LTC3035EDDB#PBF |
DFN |
8 |
E |
$1.92 |
|
| LTC3035EDDB#TR |
DFN |
8 |
E |
$1.92 |
$1.35 |
| LTC3035EDDB#TRM |
DFN |
8 |
E |
$1.92 |
$1.37 |
| LTC3035EDDB#TRMPBF |
DFN |
8 |
E |
$1.92 |
$1.37 |
| LTC3035EDDB#TRPBF |
DFN |
8 |
E |
$1.92 |
$1.35 |
演示电路板
| 器件型号 |
描述 |
| DC886A |
LTC3035EDDB Demo Board |
LTC3035 数据手册及相关资料下载
- 数据手册(英文) : LTC3035 - 300mA VLDO linear Regulator with Charge Pump Bias Generator.PDF
- 可靠性数据 : R415 Reliability Data .PDF
- LT Journal : Dec 2005 Taking Full Advantage of Very Low Dropout linear Regulators.PDF
- 产品新闻发布 (中文) : 300mA VLDO 可在 VIN 低至 1.7V 时工作并能实现 45mV 压差.PDF
