The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current.

The ADP2311 integrates the high-side and low-side MOSFETsto provide a very high efficiency, compact solution. Both channels of the regulator run at 180° out of phase to reduce the input ripplecurrent and the input capacitor size, thereby helping to lowersystem electromagnetic interference (EMI). The ADP2311 also integrates internal compensation and soft start circuitry to simplify the design.

An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. Accurate voltage monitoring circuitry and a power fail comparator provide a controlled power-up and power-down sequence to enhance system reliability.

The ADP2311 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2311 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead LFCSP package.

Applications

Industrial and instrumentation

Healthcare and medical

DC-to-dc point of load applications

Input voltage: 4.5 V to 18 V

±1.0% output accuracy

Integrated MOSFET: 110 m?/ 60 m? typical

Continuous output current: 1 A/ 1 A

Power fail comparator generates warning

Power-on reset with programmable delay timer

Adjustable voltage monitor for power down (channel 2)

Watchdog refresh input

Dual phase with 180° out of phase operation

Fixed switching frequency: 300 kHz

Internal compensation and soft start

See data sheet for additional features

EVAL-ADP2311 - ADP2311 评估板：

ADP2311评估板是完整的双通道、1 A降压稳压器解决方案，用户可采用近乎理想的印刷电路板(PCB)布局来评估ADP2311的性能。

ADP2311评估板的输出电压针对通道1和通道2分别预设为1.2 V和3.3V。 电源故障输入VIN阈值电压设置为8.99 V。不同的输出和电源故障输入电压可以通过选用合适的无源器件来实现。

产品特性

输入电压： 4.5 V至18 V

输出精度：±1.0%

集成MOSFET： 110 mΩ/60 mΩ（典型值）

连续输出电流： 1 A/ 1 A

电源故障比较器产生报警信号

带可编程延迟定时器的上电复位

针对关断的可调电压监控器

采用180°反相的看门狗刷新输入双相位

固定开关频率： 300 kHz

采用低有效串联电阻(ESR)输出陶瓷电容实现稳定的内部补偿和软启动功能

断电期间的精密使能输入功率反馈

欠压闭锁(UVLO)、过流保护(OCP)、过压保护(OVP)和热关断(TSD)

EVAL-ADP2311 - 无：

无

• ADD8504 - 4通道、多路复用输入行反转LCD伽玛缓冲器
• HMC-ALH216 - 低噪声放大器芯片，14 - 27 GHz
• AD9201 - 双通道、20 MHz、10位分辨率CMOS ADC
• AD8554 - 零漂移、单电源RRIO四通道运算放大器
• ADR423 - 超精密、低噪声、3.00 V XFET?基准电压源
• HMC-C070 - MicroSynth®集成式合成器模块，5.5 - 10.5 GHz
• AD9631 - 单位增益稳定、超低失真、高速运算放大器
• ADSP-2189M - 16位、75 MIPS、2.5v，2个串行端口，主机端口，192 KB RAM
• ADRF6516 - 31 MHz、双通道可编程滤波器和可变增益放大器
• AD7940 - 3 mW、100 kSPS、14位ADC，采用6引脚SOT-23封装