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CDH2D09 Datasheet(PDF) 36 Page - Maxim Integrated Products

Part # CDH2D09
Description  PMIC with Integrated Charger and Smart Power Selector for Handheld Devices
PDF  44 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

CDH2D09 Datasheet(HTML) 36 Page - Maxim Integrated Products

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PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
36
______________________________________________________________________________________
Enable/Disable (EN) and Sequencing
Figures 11, 12, and 13 show how the five MAX8671X
regulators are enabled and disabled. With a valid SYS
voltage and die temperature, asserting EN high
enables REG1–REG4. Pulling EN low disables
REG1–REG5. REG5 is intended to power the system
USB transceiver circuitry, which is only active when
USB power is available. Therefore, a valid source must
be on either the USB or DC input for REG5 to enable.
USBOVLO
USBUVLO
SYSOK
DCOVLO
DCUVLO
2MHz
OSC
BIAS
&
REF
64 CYCLE
DELAY
(32ms)
SYSOK
REGON
USBPOK
DCPOK
REGON
REG3OK
REG1OK
REG2OK
REG4OK
PV5OK
EN
OK
SOFT-START
REG5
EN
OK
SOFT-START
REG4
EN
OK
SOFT-START
REG2
EN
OK
SOFT-START
REG1
EN
OK
SOFT-START
REG3
REG3OK
REG1OK
REG2OK
REG4OK
REG5OK
REGON
REGON
REG3OK
REGON
REG3OK
REG1OK
REG2OK
PV4OK
DT165
DT165
+165
°C
DIE TEMP
4.0V RISING
500mV HYST
6.9V RISING
400mV HYST
4.0V RISING
500mV HYST
6.9V RISING
400mV HYST
1.6V RISING
100mV HYST
1.6V RISING
100mV HYST
2.5V FALLING
100mV HYST
PV4OK
PV5OK
EN
SYS
PV4
PV5
USB
DC
MAX8671X
Figure 11. Enable/Disable Logic



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