ADPL12008/ADPL12010

20V, 8A/10A Fully Integrated Buck Converter

with 20μA Quiescent Current and Dual-Phase

Capability

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Thermal Shutdown Protection

Thermal shutdown protection limits total power dissipation in the ICs. When the junction temperature exceeds +175°C,

an internal sensor shuts down the ICs, allowing them to cool. The thermal sensor turns on the ICs again after the junction

temperature cools by 20°C.

Dual-Phase Operation

Two ADPL12008/ADPL12010 ICs can be configured in dual-phase to provide higher output current up to 20A. To operate

in dual-phase mode, one IC is programmed as a target by connecting its SYNCOUT to BIAS, and the other IC is treated

as the controller. The SYNCOUT of the controller is connected to the SYNC of the target, allowing both ICs to switch in

180° out-of-phase. Therefore, with the present SYNCOUT signal from the controller, FPWM is recommended for dual-

phase operation.

The VEA nodes of the controller and target are connected to ensure balanced current sharing between the two phases.

Also, by doing this, the controller's voltage control loop is shared with the target. Instead of connecting FB nodes together,

use separate resistor-dividers for each phase.

To set the output voltage to a value, connect a resistor-divider between the buck output, FB, and GND as shown in

Figure 1. Use an identical but separate resistor-divider for the controller and the target.

RFB1

CONTROLLER

TARGET

OUT

OUT

FB

BIAS

BIAS

RFB1

RFB2

RFB2

2.2µF

2.2µF

FB

Figure 1. Typical Application Circuit for Dual-Phase Configuration with External Resistor-Divider