GreenPAK™ with Low Drop Out Regulators

为了克服这些挑战，Dialog提出了“柔性电力岛”的概念。利用FPIs，设计人员可以将其复杂的电力系统划分为若干个局部电力区域（或孤岛），每个区域（或孤岛）包括支持附近负荷所需的功率控制、功率排序和功率调节。这项技术带来了更高的性能和更有效的解决方案，可以灵活地根据每个系统的需求进行定制。

In some cases, using an FPI can be very useful to augment the functions included in a Power Management IC (PMIC). In this use case, the FPI can support local point-of-load regulation, sequencing and power monitoring. This can result in simpler layout, as well as improved energy and thermal efficiency.

For smaller and simpler systems (which have up to six power rails), the FPI concept can provide most or all of the power system functions needed. In this case, the FPI can serve as a “µPMIC”, but with the added benefit of greater levels of flexibility and customization, with no requirements for NRE.

With the SLG46580, Dialog has captured many of these necessary power system functions (power monitoring, sequencing, reset and power switching) in a tiny 2.0 x 3.0 mm 20 pin fully encapsulated plastic package. Using Dialog’s easy-to-use GUI based GPAK Designer™ and GPAK development hardware, designers can quickly and easily implement their unique configuration of the device, thereby customizing the functions to match their unique power requirements.

The SLG46580 has four LDOs, each with a maximum output current of 150mAs. Each of the LDOs has a programable output voltage level that can be set to one of thirty two different values from 0.9V to 4.35V, and also have programmable options for slew-rate selection and fault detection.

The FPI concept is broadly applicable across a range of end markets, shown below.

• Handheld Devices
• Wearable Electronics
• Computing & Storage
• Consumer Electronics
• Smart Home
• Networking & Communications
• Medical & Industrial

Benefits of GreenPAK with LDOs

高度集成

• 包括电力系统中常见的许多部件
  • 权力Control
  • 功率排序
  • 权力Monitoring
  • 权力Regulation

Small Size

• 2.0x 3.0 STQFN packaging for small board area

三模150 mA LDO稳压器：

• Mode 0: 150mA output with Quiescent Current at ~60 μA
• Mode 1: 100μA output with Quiescent Current at ~6 μA
• Bypass Mode: Acts like a load switch

Flexibility of GreenPAK Configurable Macro-cells

• Analog Comparators
• Combination Function Macro-cells
• Asynchronous State Machine (ASM)
• 我²C从机协议接口

Using Asynchronous State Machine for Power Sequencing

The Asynchronous State Machine (ASM) macro-cell is perfect for driving a flexible power-sequencing architecture. The Graphic User Interface (GUI) based development tools allow the user to quickly define the operating states, the allowed transitions between states, and link to the signals that drive each state transition. Using other GreenPAK macro-cells allows the user to easily time based state transitions (using delay macro-cells) and logic functions (using Look-Up Tables). The example state machine shown below is the one used in the demo project to drive both the power sequencing signals for six power rails, as well as the signals to turn on the four LDOs in sequence.

利用GreenPAK资源控制LDO

这些设备中包含的LDO允许用户在操作期间动态控制输出的许多方面：

Controlling Output Voltage:Each LDO can support two output voltages, which are user-selectable. There is an internal signal coming from the Connection Matrix that can switch the output voltage during operation.

控制功耗：每个LDO稳压器可以在MODE0(标准active mode supporting full 150 mA output), as well as MODE1 (low power mode with maximum 100μ output with reduced quiescent current consumption.

Load Switch Mode:Each LDO has a user-selectable option where regulator ceases to regulate and the power MOSFET is turned on as a power switch, passing the voltage applied to VIN directly to VOUT.

Changing LDO Behavior Via I²C:All of the control features listed above can also be changed via I²C commands.