MAX8903JETI+ Maxim Integrated, MAX8903JETI+ Datasheet - Page 14

• Manufacturer Part Number: MAX8903JETI+
• Description: Battery Management 2A 1-Cell Li+ DC-DC USB/Adapter Charger
• Manufacturer: Maxim Integrated
• Series: MAX8903A, MAX8903B, MAX8903C, MAX8903D, MAX8903E, MAX8903G, MAX8903H, MAX8903J, MAX8903Yr

Specifications of MAX8903JETI+

• Rohs: yes
• Battery Type: Li-Ion
• Output Voltage: 5 V
• Output Current: 1 mA
• Operating Supply Voltage: 4.1 V to 16 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: Yes
• Maximum Power Dissipation: 1666.7 mW
• Operating Supply Current: 2.3 mA
• Product Type: Charge Management
• Temperature Monitoring: Yes
• Uvlo Start Threshold: 3.2 V

The MAX8903_ is a dual input charger with a 16V input
for a wide range of DC sources and USB inputs. The IC
includes a high-voltage (16V) input DC-DC step-down
converter that reduces charger power dissipation while
also supplying power to the system load. The step-
down converter supplies up to 2A to the system, the
battery, or a combination of both.
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
MAX8903A–E/G/H/J/N/Y
Figure 2. Typical Application Circuit Using a Separate DC and USB Connector
14
INDUCTOR SELECTION)
VBUS
GND
(SEE TABLE 5 FOR
ADAPTER
USB
USB SUSPEND
Circuit Description
CHARGE ON
500mA
4.7µF
OFF
100mA
1µH
0.15µF
C
C
0.1µF
L1
DC
BST
C
4.7µF
C
CT
USB
TO DC
17
27
26
14
10
28
25
15
1
2
3
4
6
5
7
USUS
CT
LX
LX
DCM
IUSB
PG
PG
DC
DC
BST
CS
CS
USB
CEN
MAX8903_
EP
A USB charge input can charge the battery and power
the system from a USB power source. When powered
from USB or the DC input, system load current peaks
that exceed what can be supplied by the input are sup-
plemented by the battery.
The MAX8903_ also manages load switching from the
battery to and from an external power source with an
on-chip 50mΩ MOSFET. This switch also helps support
load peaks using battery power when the input source
is overloaded.
DOK
CHG
THM
UOK
ISET
GND
SYS
SYS
BAT
BAT
FLT
IDC
VL
13
18
19
11
23
20
9
16
12
8
22
24
21
R
4 x 100kΩ
R
R
PU
ISET
IDC
C
1µF
C
10µF
VL
BAT
C
(SEE TABLE 6 FOR C
SYS
TO SYSTEM
LOAD
R
10kΩ
T
1-CELL
LI+
NTC
10kΩ
TO VL
FAULT
OUTPUT
CHARGE
INDICATOR
USB PWR OK
DC PWR OK
SYS
SELECTION)
Maxim Integrated