MAX8903A–E/G/H/J/N/Y

2A 1-Cell Li+ DC-DC Chargers

for USB and Adapter Power

26

Maxim Integrated

Note 5: Typical values. See the

Electrical Characteristics table for min/max values.

Note 6: Note that this also changes the timing for the prequal and fast-charge timers.

Note 7: See the

Power Enable on Battery Detection section for details.

Note 8: The MAX8903H is a newer version of the MAX8903C that is a recommended for new designs.

Selector Guide

The MAX8903_ is available in several options designat-

ed by the first letter following the root part number. The

basic

architecture

and

functionality

of

the

MAX8903A–MAX8903E/MAX8903G/MAX8903Y are the

same. Their differences lie in certain electrical and

operational parameters. Table 6 outlines these differ-

ences.

Table 6. Selector Guide

PARAMETER MAX8903A MAX8903B MAX8903C MAX8903D MAX8903E MAX8903G MAX8903H MAX8903J MAX8903N MAX8903Y

Minimum SYS

Regulation

Voltage

(VSYSMIN)

3.0V

3.0V

3.4V

3.4V

3.0V

3.0V

3.4V

3.4V

3.4V

3.0V

SYS Regulation

Voltage

(VSYSREG)

4.4V

4.325V

4.4V

4.4V

4.325V

4.325V

4.4V

4.5V

4.4V

4.4V

Minimum

Allowable

Inductor

2.2µH

2.2µH

2.2µH

2.2µH

2.2µH

2.2µH

1µH

1µH

1µH

1µH

Switching

Frequency

4MHz

4MHz

4MHz

4MHz

4MHz

1MHz

4MHz

4MHz

4MHz

4MHz

SYS Load

Regulation

40mV/A

25mV/A

40mV/A

40mV/A

25mV/A

25mV/A

40mV/A

25mV/A

25mV/A

25mV/A

Minimum SYS

Output

10µF

22µF

10µF

10µF

22µF

22µF

10µF

10µF

22µF

22µF

BAT Regulation

Voltage

(VBATREG)

(Note 5)

4.2V

4.2V

4.2V

4.1V

4.1V

4.2V

4.2V

4.35V

4.15V

4.15V

BAT Prequal

Threshold

(VBATPQ)

(Note 5)

3V

2.5V

3V

3V

2.5V

2.5V

3V

3V

3V

3V

Top-Off Timer

(Note 6)

15s (fixed)

132min

15s (fixed)

15s (fixed)

132min

132min

15s (fixed)

15s (fixed)

15s (fixed)

15s (fixed)

VL Output

Current Rating

1mA

10mA

1mA

1mA

10mA

10mA

1mA

1mA

1mA

1mA

Power-Enable

On Battery

Detection

(Note 7)

No

Yes

No

No

Yes

Yes

No

No

No

No

Comments

—

—

—

—

—

—

(Note 8)

—

—

—