CDH2D09 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
MFG CO.
'CDH2D09' PDF : 44 Pages View PDF
PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
SYS
2.5V FALLING
PV4 100mV HYST
1.6V RISING
PV5 100mV HYST
1.6V RISING
100mV HYST
USB
6.9V RISING
400mV HYST
4.0V RISING
500mV HYST
DC
6.9V RISING
400mV HYST
4.0V RISING
500mV HYST
SYSOK
PV4OK
PV5OK
USBOVLO
USBUVLO
DCOVLO
DCUVLO
EN
2MHz
OSC
BIAS
&
REF
64 CYCLE
DELAY
(32ms)
DT165
SYSOK
DIE TEMP
+165°C
USBPOK
DCPOK
REGON
Figure 11. Enable/Disable Logic
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
DT165
MAX8671X
REGON
REGON
REG3OK
REGON
REG3OK
REG1OK
REG2OK
PV4OK
REGON
REG3OK
REG1OK
REG2OK
REG4OK
PV5OK
SOFT-START
REG3
EN
OK
REG3OK
SOFT-START
REG1
EN
OK
REG1OK
SOFT-START
REG2
EN
OK
REG2OK
SOFT-START
REG4
EN
OK
REG4OK
SOFT-START
REG5
EN
OK
REG5OK
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.
36 ______________________________________________________________________________________
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