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MAX8903A

2A 1-Cell Li+ DC-DC Charger for USB* and Adapter Power

Maxim Integrated 

2A 1-Cell Li+ DC-DC Charger for USB*

and Adapter Power

ELECTRICAL CHARACTERISTICS (continued)

(VDC = VUSB = 5V, VBAT = 4V, circuit of Figure 2, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

(Note 1)

PARAMETER

Fast-Charge Current

DONE Threshold

RISET Resistor Range

ISET Output Voltage

ISET Current Monitor Gain

BAT Leakage Current

Charger Soft-Start Time

Charger Thermal Limit

Temperature

Charger Thermal Limit Gain

CHARGER TIMER

Prequalification Time

Fast-Charge Time

Timer Accuracy

Timer Extend Current Threshold

CONDITIONS

RISET = 600Ω

RISET = 1.2kΩ

RISET = 2.4kΩ

Percentage of fast-charge, IBAT decreasing

No DC or USB input

With valid input power, VCEN = 5V

Charge current = 0 at +120°C

CCT = 0.15µF

CCT = 0.15µF

Percentage of fast-charge current below which the timer

clock operates at half-speed

MIN

1800

900

450

0.6

-15

40

TYP

2000

1000

500

10

1.5

1.25

0.05

1

1.0

100

5

33

660

50

MAX

2200

1100

550

2.4

4

6

+15

60

UNITS

mA

%

kΩ

V

mA/A

µA

ms

°C

%/°C

min

min

%

%

Timer Suspend Current Threshold

Percentage of fast-charge current below which timer

clock pauses

16

20

24

%

Charge Done Delay Time

From done threshold detection until charger turns off and

CHG goes high

15

s

THERMISTOR MONITOR

THM Threshold, Hot

When charging is suspended, 1% hysteresis

0.27 x 0.28 x 0.29 x

VVL

VVL

VVL

V

THM Threshold, Cold

When charging is suspended, 1% hysteresis

0.73 x 0.74 x 0.75 x

VVL

VVL

VVL

V

THM Threshold, Disabled

THM function is disabled below this voltage

0.0254 0.03 x 0.036 x

x VVL VVL

VVL

V

THM Input Leakage

THM = GND or VL; TA = +25°C

THM = GND or VL; TA = +85°C

-0.1 +0.001 +0.2

µA

0.01

THERMAL SHUTDOWN, VL, AND LOGIC I/O: CHG, FLT, DOK, UOK, DCM, CEN, USUS, IUSB

Logic-Input Thresholds

(DCM, CEN, USUS, IUSB)

High level

Low level

Hysteresis

1.3

V

0.4

50

mV

Logic-Input Leakage Current

(DCM, CEN, USUS, IUSB)

VINPUT = 0 to 5.5V

TA = +25°C

TA = +85°C

0.001

1

µA

0.01

4 _______________________________________________________________________________________

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