User Manual

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CL5ADAH2Z
Confidential
2020.11.05 rev.1.1
Figure7 shows reference block diagram of the module.
An external DC-DC converter is required on the VBAT_FEM side of the module.
The reason why the DC-DC converter is necessary is as follows.
● It is synchronizing with eDRX, for power saving.
● The module learns autonomously eDRX cycle.
AUX_ADC4 (BOOST_EN) synchronizes with eDRX and can control the DC-DC converter.
(AUX_ADC4 (BOOST_EN) control VBAT_FEM in synchronization with eDRX.)
Figure7 is the recommended circuit. We designed to minimize reduce the current
consumption during DH2.
Figure7 reference power block diagram of the module
The external DC-DC converter is TPS61021ADSG.
VBAT_FEM should be supplied by external DC-DC and controlled by ADC_AUX4 (BOOST_EN) pin.
Figure8 shows circuit of the DC-DC. Refer to datasheet of TPS61021ADSG for details.
Figure8 reference circuit of the DC-DC