Analog Devices Inc. ADP5070/ADP5071 直流-直流开关稳压器
亚德诺半导体 ADP5070/ADP5071 直流-直流开关稳压器是双 高性能直流-直流稳压器，可产生独立 调节的正/负供电轨。 ADP5070/ADP5071 具有 2.85V 至 15V 的输入电压范围，支持各种应用。这 两个稳压器中的集成主开关可产生 高达 +39V 的可调正输出电压，以及 低至输入电压以下 −39V 的负输出电压。ADP5070/ADP5071 的工作开关频率 可通过引脚选择为1.2MHz/2.4MHz， 可与外部振荡器在 1.0MHz 至 2.6MHz 范围内同步，从而轻松滤除敏感应用中的噪声。主要 安全特性有过流保护（OCP）、过压 保护（OVP）、热关断（TSD）和输入欠压闭锁 （UVLO）。ADP5070/ADP5071 直流-直流开关稳压器采用 20 引脚 LFCSP 封装，额定结温范围为 -40°C 到 +125°C， 适用于 双极性放大器、模数转换器、 数模转换器 & 多路复用器、电荷耦合器件（CCD）偏置电源、 光模块电源及 RF 功率放大器（PA）偏置。
The integrated main switch in both regulators allows the generation of an adjustable positive output voltage up to +39V and a negative output voltage down to -39V below the input voltage. Operating at a pin-selected 1.2MHz/2.4MHz switching frequency, ADP5070/ADP5071 can synchronize with an external oscillator from 1.0MHz to 2.6MHz to ease noise filtering in sensitive applications.
Key safety features include overcurrent protection (OCP), overvoltage protection (OVP), thermal shutdown (TSD), and input under-voltage lockout (UVLO).
Available in a 20-lead LFCSP package and rated for a -40°C to +125°C junction temperature range, the ADP5070/ADP5071 DC-to-DC switching regulators are ideal for bipolar amplifiers, ADCs, DACs & multiplexers, charge-coupled device (CCD) bias supply, optical module supply, and RF power amplifier (PA) bias.
特性
- Wide input supply voltage range: 2.85V to 15V
- Generates well regulated, independently resistor programmable VPOS and VNEG outputs
- Boost regulator to generate VPOS output
- Adjustable positive output to 39V
- Integrated main switch
- 1.0A (ADP5070)
- 1.2A (ADP5071)
- Optional single-ended primary-inductor converter (SEPIC) configuration for automatic step-up/step-down
- Inverting regulator to generate VNEG output
- Adjustable negative output to VIN − 39V
- Integrated 0.6A main switch
- 0.6A (ADP5070)
- 1.2A (ADP5071)
- True shutdown for both positive and negative outputs
- 1.2MHz/2.4MHz switching frequency with optional external frequency synchronization from 1.0MHz to 2.6MHz
- Resistor programmable soft-start timer
- Slew rate control for lower system noise
- Individual precision enable and flexible start-up sequence control for the symmetric start, VPOS first, or VNEGfirst
- Out-of-phase operation
- UVLO, OCP, OVP, and TSD protection
- 4mm × 4mm, 20-lead LFCSP and 20-lead TSSOP
- -40°C to +125°C junction temperature range
- Supported by the ADIsimPower toolset
应用
- Bipolar amplifiers, ADCs, DACs, and multiplexers
- Charge-coupled device (CCD) bias supply
- Optical module supply
- RF power amplifier (PA) bias
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