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BM92A50MWV Datasheet(PDF) 11 Page - Rohm |
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BM92A50MWV Datasheet(HTML) 11 Page - Rohm |
11 / 35 page 11/31 TSZ02201-0232AA000470-1-2 © 2016 ROHM Co., Ltd. All rights reserved. 21.Sep.2016 Rev.001 www.rohm.com TSZ22111 • 15 • 001 BM92A50MWV 4.7. Power Supply Management 4.7.1. Outline This LSI has a power selector. It select the lowest power supply voltage from VSVR, VEX, or VB for low power consumption. Internal Power Supply (VCCIN) gives priority in order of VSVR, VEX, and VB. VCCIN supplied from the power selector is used to LSI main power source. LDOs (for internal only) are supplied from VCCIN, and output each internal supply voltage. Each power supply input have UVLO and OVLO. And POR (power on reset) signal is generated from detection of LDO28OK, LDO15DOK, LDO15AOK, and VCCIN. VSVR VEX VB VCCIN UVLO/OVLO Detection Internal Power Supply POR POR signal LDO LDO LDO LDO28CAP LDO15DCAP LDO15ACAP LDO28OK LDO15DOK LDO15AOK Internal Power Supply UVLO /OVLO signal VDDIO VDDIO detection signal DET VBUS VEX VSVR VCCIN 0V 5 to 20V 0V 5 to 20V 0V 5V 0V VBUS VEX VSVR Figure 4-1 Power Supply Management Block Diagram and Timing Chart |
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