CDH2D09 datasheet(37/44 Pages) MAXIM

Part #	CDH2D09

Description	PMIC with Integrated Charger and Smart Power Selector for Handheld Devices

PDF	44 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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37 / 44 page

PMIC with Integrated Charger and

Smart Power Selector for Handheld Devices

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The VL regulator is not controlled by EN. It is powered

from the higher of USB or DC and automatically powers

up when either of the power inputs exceeds approxi-

mately 1.5V. Similarly, VL automatically powers down

when both the USB and DC power inputs are removed.

Soft-Start/Inrush Current

The MAX8671X implements soft-start on many levels to

control inrush current, to avoid collapsing supply volt-

ages, and to fully comply with the USB 2.0 specifica-

tions. All USB, DC, and charging functions implement

soft-start. The USB and DC nodes only require 4.7µF of

input capacitance. Furthermore, all regulators imple-

ment soft-start to avoid transient overload of power

inputs (Figure 12).

VEN

VOUT1

VOUT2

VVL

VUSB

INTERNAL

DISCHARGE

RESISTORS

VSYS

VBAT

tSS5

VUOK

HIGH-Z

VDC

VOUT3

VOUT4

VOUT5

HIGH-Z

VDOK

HIGH-Z

VBAT < VSYS < (VUSB OR VDC)

tSS4

tD3

tSS3

tD2

tSS2

tSS1

tD1

Figure 12. Enable and Disable Waveforms

CDH2D09 Datasheet(PDF) 37 Page - Maxim Integrated Products

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