MAX8903A Maxim Integrated Products, MAX8903A Datasheet - Page 2

• Manufacturer Part Number: MAX8903A
• Description: 2A 1-Cell Li+ DC-DC Charger for USB* and Adapter Power
• Manufacturer: Maxim Integrated Products

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2A 1-Cell Li+ DC-DC Charger for USB*
and Adapter Power
ABSOLUTE MAXIMUM RATINGS
DC, LX, DCM to GND .............................................-0.3V to +20V
DC to SYS .................................................................-6V to +20V
BST to GND ...........................................................-0.3V to +26V
BST TO LX ................................................................-0.3V to +6V
USB to GND .............................................................-0.3V to +9V
USB to SYS..................................................................-6V to +9V
VL to GND ................................................................-0.3V to +6V
THM, IDC, ISET, CT to GND .........................-0.3V to (VL + 0.3V)
DOK, FLT, CEN, UOK, CHG, USUS,
SYS to BAT ...............................................................-0.3V to +6V
PG, EP (exposed pad) to GND .............................-0.3V to +0.3V
DC Continuous Current (total in two pins)......................2.4A
USB Continuous Current.......................................................1.6A
ELECTRICAL CHARACTERISTICS
(V
(Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
2
DC INPUT
DC Operating Range
DC Undervoltage Threshold
DC Overvoltage Threshold
DC Supply Current
DC High-Side Resistance
DC Low-Side Resistance
DC-to-BAT Dropout Resistance
DC-to-BAT Dropout Voltage
Switching Frequency
DC Step-Down Output Current-
Limit Step Range
DC Step-Down Output Current
Limit
DC Soft-Start Time
DC
BAT, SYS, IUSB, CS to GND ................................-0.3V to +6V
_______________________________________________________________________________________
= V
USB
PARAMETER
= 5V, V
BAT
= 4V, circuit of Figure 2, T
When V
rising, 500mV typical hysteresis
When V
hysteresis
Charger enabled, no switching, V
Charger enabled, f = 3MHz, V
C har g er enab l ed , V
C har g er enab l ed , V
V
When SYS regulation and charging stops, V
200mV hysteresis
V
V
V
No valid USB input
Valid USB input before soft-start
DCM
DC
DC
DC
= 8V, V
= 5V, V
= 6V, V
= 0V, V
DOK
DOK
BAT
BAT
SYS
goes low, V
goes high, V
USUS
A
= 4V
= 3V
= 4V
= -40°C to +85°C, unless otherwise noted. Typical values are at T
C E N
C E N
= 5V
CONDITIONS
RMS
= 0V , 100m A U S B m od e ( N ote 2)
= 5V , 100m A U S B m od e ( N ote 2)
DC
DC
rising, 500mV typical
DC
LX Continuous Current (total in two pins).......................2.4A
CS Continuous Current (total in two pins) ......................2.4A
SYS Continuous Current (total in two pins) .......................3A
BAT Continuous Current (total in two pins) .......................3A
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature Range ............................-40°C to +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
SYS
= 5V
No valid USB input
Valid USB input
R
R
R
28-Pin Thin QFN-EP
28-Pin Thin QFN-EP
IDC
IDC
IDC
Multilayer (derate 28.6mW/°C above +70°C) ..........2286mW
Single-Layer (derate 20.8mW/°C above +70°C)...1666.7mW
= 5V
= 3kΩ
= 6kΩ
= 12kΩ
DC
falling,
1900
4.15
16.5
MIN
950
450
3.9
4.0
0.5
0
A
= +70°C)
1000
2000
0.10
TYP
0.15
0.15
0.31
500
4.0
4.3
2.3
15
20
17
15
1
1
4
3
1
MAX
2100
1050
17.5
0.25
550
4.1
4.4
16
30
4
2
2
2
A
= +25°C.)
UNITS
MHz
mA
mV
mA
ms
µs
Ω
Ω
Ω
V
V
V
A
RMS
RMS
RMS
RMS