All trademarks are the property of their respective owners.
The LP8764x-Q1 power management integrated circuit (PMIC) family is extremely flexible and scalable, providing configurability at the device and system level. At the device level, a single PMIC can provide up to four separate step down converters (buck regulators). These buck regulators can be used in multiphase mode to provide a single 20 A source. At the system level, several PMICs can be configured to work in a controller-target topology with one controller and up to five target PMICs. The LP8764x-Q1 evaluation module (EVM) is both an evaluation and development tool. With the EVM both device level and system level configurability are available through an easy to use graphical user interface (GUI) tool.
Table 1-1 shows the available controller and target EVMs, the silicon associated with those EVMs, the initial non-volatile memory (NVM) configuration, and the hardware components associated with the configurations. Because of the configurable nature of both the part and the EVM, any EVM can be configured as a controller or target device.
| EVM Part Number | PMIC Device Part Number | NVM Phase Configuration | fSW | Populated phase components | |
|---|---|---|---|---|---|
| R1-R7 | J3-J8 | ||||
| LP87642Q1EVM | LP876411E2RQKRQ1 | 4-phase, single output: BUCK1+BUCK2+BUCK3+BUCK4 | 2.2MHz | R1, R2, R5 and R6 | J3-J8 |
| LP87644Q1EVM | LP876441E4RQKRQ1 | 4-output: BUCK1, BUCK2, BUCK3, BUCK4 | 4.4MHz | R1, R3, R4 and R7 | - |
Only a power supply and the EVM are required to evaluate and test the LP8764x-Q1 default configuration under load conditions. This section contains the controller and controller+target configurations and how to run these two default configurations.
Terminal J9, labeled VCCA in Figure 2-1, can accept wire gauges up to 14 AWG. The voltage supplied must be within the input range of the device, 2.8 V to 5.5 V. The power supply providing the input to VCCA is required to supply 135 % of the output power. Once power has been supplied to VCCA, the GPIO4 / ENABLE jumper can be used to power on the output rails (in LP87644Q1EVM GPIO2 can be used to control BUCK4 after GPIO4 has been set high). The default ON Request for the controller device is the ENABLE pin which is a level sensitive input. Please refer to LP8764-Q1 datasheet for more details.
Figure 2-1 shows the LP8764x-Q1 EVM (controller).