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MAX8725

Multichemistry Battery Chargers with Automatic System Power Selector

Maxim Integrated 

Multichemistry Battery Chargers with Automatic

System Power Selector

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, VDCIN = VCSSP = VCSSN = 18V, VBATT = VCSIP = VCSIN = 12V, VVCTL = VICTL = 1.8V, MODE = float, ACIN = 0, CLS =

REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, TA = -40°C to +85°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Charge-Current Accuracy

MAX1909: VICTL = 3.6V x 0.5, MAX8725:

VICTL = 3.2V x 0.5 (including ICTL resistor

-7.0

tolerances of 1%)

+7.0

%

VICTL Default Threshold

BATT/CSIP/CSIN Input Voltage

Range

VICTL = VLDO (default threshold of 45mV)

-5

VICTL rising

4.3

0

+5

V

19

V

CSIP/CSIN Input Current

ICTL Power-Down Mode

Threshold Voltage

ICTL Power-Up Mode Threshold

Voltage

INPUT CURRENT REGULATION

Charging enabled

MAX1909

MAX8725

MAX1909

MAX8725

650

µA

0.75

V

0.06

0.85

V

0.11

CSSP-to-CSSN Full-Scale

Current-Sense Voltage

72.75

77.25 mV

Input Current-Limit Accuracy

CSSP/CSSN Input Voltage Range

CSSP/CSSN Input Current

CLS Input Range

IINP Transconductance

VCLS = REF

-3

VCLS = REF x 0.75

-3

VCLS = REF x 0.5

-4

8.0

VCSSP = VCSSN = VDCIN > 8.0V

1.6

VCSSP - VCSSN = 56mV

2.7

VCSSP - VCSSN = 75mV, terminated with

-7.5

10kΩ

+3

+3

+4

28

730

REF

3.3

+7.5

%

V

µA

V

mA/V

IINP Accuracy

VCSSP - VCSSN = 56mV, terminated with

-5

10kΩ

+5

%

VCSSP - VCSSN = 20mV, terminated with

-10

10kΩ

IINP Output Current

VCSSP - VCSSN = 150mV, VIINP = 0V

350

IINP Output Voltage

VCSSP - VCSSN = 150mV, VIINP = float

3.5

SUPPLY AND LINEAR REGULATOR

DCIN Input Voltage Range

VDCIN

8.0

DCIN Undervoltage-Lockout Trip

DCIN falling

7

P oi nt

DCIN rising

DCIN Quiescent Current

BATT Input Current

LDO Output Voltage

LDO Load Regulation

IDCIN

IBATT

8.0V < VDCIN < 28V

VBATT = 2V to 19V, VDCIN > VBATT + 0.3V

8.0V < VDCIN < 28V, no load

0 < ILDO < 10mA

5.25

+10

µA

V

28

V

V

7.85

6

mA

500

µA

5.55

V

115

mV

_______________________________________________________________________________________ 7

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