MAX8671XETL+ Maxim Integrated Products, MAX8671XETL+ Datasheet - Page 24

• 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

The MAX8671X highly integrated PMIC is ideally suited
for use in portable audio player and handheld applica-
tions. As shown in Figure 2, the MAX8671X integrates
USB power input, AC-to-DC adapter power input (DC),
Li+/Li-Poly battery charger, three step-down regulators,
two linear regulators, and various monitoring and status
outputs. The MAX8671X offers adjustable output volt-
ages for all outputs.
The MAX8671X Smart Power Selector seamlessly dis-
tributes power between the two current-limited external
inputs (USB and DC), the battery (BAT), and the sys-
tem load (SYS). The basic functions performed are:
• With both an external power supply (USB or DC)
PMIC with Integrated Charger and
Smart Power Selector for Handheld Devices
Table 1. Input Limiter Control Logic
* Charge current cannot exceed the input current limit. Charge can be less than the maximum charge current if the total SYS load
exceeds the input current limit.
X = Don’t care.
24
AC-to-DC Adapter at
DC Input
USB Power at DC Input
USB Power at USB
Input, DC Unconnected
DC and USB
Unconnected
and battery (BAT) connected:
POWER SOURCE
______________________________________________________________________________________
When the system load requirements are less than
the input current limit, the battery is charged with
residual power from the input.
Detailed Description
DOK
H
H
H
H
L
L
L
L
Smart Power Selector
UOK
X
X
X
X
H
L
L
L
PEN1
H
X
X
X
X
L
L
L
PEN2
H
H
X
X
X
X
L
L
USUS
• When the battery is connected and there is no exter-
• When an external power input is connected and
The dual-input Smart Power Selector supports end
products with dual and single external power inputs.
For end products with dual external power inputs, con-
nect these inputs directly to the DC and USB nodes of
the MAX8671X. For end products with a single input,
connect the single input to the DC node and connect
USB to ground or leave it unconnected. In addition to
AC-to-DC adapters current limits, the DC input also
supports USB current limit to allow for end products
H
H
X
L
L
L
L
X
nal power input, the system (SYS) is powered from
the battery.
there is no battery, the system (SYS) is powered
from the external power input.
When the system load requirements exceed the
input current limit, the battery supplies supple-
mental current to the load through the internal sys-
tem load switch.
No DC input
CURRENT
DC INPUT
Suspend
100mA
500mA
I
LIMIT
DCLIM
USB input off,
No USB input
DC input has
USB INPUT
CURRENT
Suspend
100mA
500mA
priority
LIMIT
Lower of I
Lower of I
Lower of I
Lower of I
Lower of I
CURRENT*
MAXIMUM
CHARGE
100mA
500mA
100mA
500mA
I
DCLIM
and
and
and
and
and
0
0
0
CHGMAX
CHGMAX
CHGMAX
CHGMAX
CHGMAX