LTC3252 - LTC3252是Dual, Low Noise, Inductorless Step-Down DC/DC Converter
LTC3252是Linear公司的一款稳压的降压型充电泵产品，LTC3252是Dual, Low Noise, Inductorless Step-Down DC/DC Converter，本站介绍了LTC3252的封装应用图解、特点和优点、功能等，并给出了与LTC3252相关的凌力尔特元器件型号供参考。
LTC3252 - Dual, Low Noise, Inductorless Step-Down DC/DC Converter
LTC3252 - Dual, Low Noise, Inductorless Step-Down DC/DC Converter - Linear Technology（凌力尔特）
功能描述
The LTC3252 is a switched capacitor step-down DC/DC converter that produces two adjustable regulated outputs from a single 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve a typical efficiency increase of 50% over that of a linear regulator. No inductors are required.
A unique constant frequency, spread spectrum architecture provides a very low noise regulated output as well as low noise at the input. The part also has Burst Mode operation to provide high efficiency at low output currents, as well as ultralow current shutdown.
Low operating currents (60µA with both outputs enabled, 35µA with one output enabled) and low external parts count make the LTC3252 ideally suited for space-constrained battery-powered applications. The part is shortcircuit and overtemperature protected and is available in a tiny 4mm x 3mm 12-pin DFN package.
特点
2.7V to 5.5V Input Voltage Range No Inductors Typical Efficiency 50% Higher than LDOs Spread Spectrum Operation Low Input and Output Noise Shutdown Disconnects Load from VIN Dual Adjustable Independent Outputs (Range: 0.9V to 1.6V) Output Current: 250mA Each Output Low Operating Current: IIN = 60µA Typ (35µA with One Output Enabled) Low Shutdown Current: IIN = 0.01µA Typ Soft-Start Limits Inrush Current at Turn On Short Circuit and Over Temperature Protected Available in 4mm x 3mm 12-Pin DFN Package应用
Handheld Electronic Devices Cellular Phones Low Voltage Logic Supplies DSP Power Supplies 3.3V to 1.5V Conversion以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
| LTC3252EDE | 4x3 DFN-12 | E | $3.71 | $2.60 |
| LTC3252EDE#PBF | 4x3 DFN-12 | E | $3.71 | $2.60 |
| LTC3252EDE#TR | 4x3 DFN-12 | E | | $2.70 |
| LTC3252EDE#TRPBF | 4x3 DFN-12 | E | | $2.70 |
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