MAX8671XETL+ Maxim Integrated Products, MAX8671XETL+ Datasheet - Page 21

• Manufacturer Part Number: MAX8671XETL+
• Description: IC PMIC W/CHARGER 40-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8671XETL+

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 4.1 V ~ 6.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-WFQFN Exposed Pad
• Mounting Style: SMD/SMT
• Input Voltage: 2.6 V to 6.6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Output Current: 0.5 A
• Output Voltage: 0.6 V to 5 V
• Supply Current: 0.285 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
—
Smart Power Selector for Handheld Devices
NAME
DISET
CISET
PEN1
PEN2
CST2
CST1
THM
UOK
PG1
PG3
FB3
BAT
SYS
LX1
LX3
PV3
______________________________________________________________________________________
CT
VL
EP
Inductor Switching Node for REG1. LX1 is internally pulled to PG1 by 1kΩ in shutdown.
Power Ground for the REG1 Step-Down Regulator
Power Ground for the REG3 Step-Down Regulator
Inductor Switching Node for REG3. LX3 is internally pulled to PG3 by 1kΩ in shutdown.
Power Input for the REG3 Step-Down Regulator. Connect PV3 to SYS. Bypass PV3 to PG3 with a
4.7µF ceramic capacitor.
IC Supply Output. VL is an LDO output that powers the MAX8671X internal battery-charger circuitry.
VL provides 3.3V at 3mA to power external circuitry when DC or USB is present. Connect a 0.1µF
capacitor from VL to AGND.
Feedback Input for REG3. Connect FB3 to the center of a resistor voltage-divider from the REG3
output capacitors to AGND to set the output voltage from 1V to V
DC Input Current-Limit Select Input. Connect a resistor from DISET to AGND (R
current limit. See Table 2 for more information.
Charge Rate Select Input. Connect a resistor from CISET to AGND (R
current limit, prequalification-charge current limit, and top-off threshold.
Charge Timer Programming Node. Connect a capacitor from CT to AGND (C
required for a fault to occur in fast-charge or prequalification modes. Connect CT to AGND to disable
the fast-charge and prequalification timers.
Thermistor Input. Connect a negative temperature coefficient (NTC) thermistor that has a good
thermal contact with the battery from THM to AGND. Connect a resistor equal to the thermistor
resistance at +25°C from THM to VL. Charging is suspended when the battery is outside the hot or
cold limits.
Positive Battery Terminal Connection. Connect BAT to the positive terminal of a single-cell Li+/Li-Poly
battery.
System Supply Output. Bypass SYS to power ground with a 10µF ceramic capacitor.
When a valid voltage is present at USB or DC and not suspended (USUS = low), SYS is limited to
5.3V (V
by V
SYS is connected to BAT through an internal system load switch (R
present at USB or DC.
Input Current-Limit Control 1. See Table 1 for more information.
Open-Drain Charger Status Output 2. CST1 and CST2 indicate four different charger states. See
Table 3 for more information.
Active-Low, Open-Drain USB Power-OK Output. UOK is low when V
range.
Open-Drain Charger Status Output 1. CST1 and CST2 indicate four different charger states. See
Table 3 for more information.
Input Current-Limit Control 2. See Table 1 for more information.
Exposed Paddle. Connect the exposed paddle to AGND. Connecting the exposed paddle does not
remove the requirement for proper ground connections to AGND, PG1, PG2, and PG3.
BSREG
PMIC with Integrated Charger and
SYS-REG
allowing both the external power source and the battery service SYS.
). When the system load (I
SYS
) exceeds the input current limit, SYS drops below V
FUNCTION
Pin Description (continued)
SYS
BS
USB
.
CISET
) when a valid source is not
is within its valid operating
) to set the fast-charge
CT
DISET
) to set the time
) to set the DC
BAT
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