MAX745CSLASHD datasheet(2/8 Pages) MAXIM

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Switch-Mode Lithium-Ion

Battery Charger

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDCIN = 18V, VBATT = 8.4V, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)

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.

DCIN to GND ............................................................-0.3V to 26V

BST, DHI to GND ......................................................-0.3V to 30V

BST to LX ....................................................................-0.3V to 6V

DHI to LX............................................(LX - 0.3V) to (BST + 0.3V)

LX to GND ................................................-0.3V to (DCIN + 0.3V)

VL to GND...................................................................-0.3V to 6V

CELL0, CELL1, IBAT, STATUS, CCI, CCV,

REF, SETI, VADJ, DLO, THM/SHDN to GND ..-0.3V to (VL + 0.3V)

BATT, CS to GND .....................................................-0.3V to 20V

PGND to GND..........................................................-0.3V to 0.3V

VL Current ...........................................................................50mA

Continuous Power Dissipation (TA = +70°C)

SSOP (derate 8.00mW/°C above +70°C) ......................640mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature.........................................-60°C to +150°C

Lead Temperature (soldering, 10sec) .............................+300°C

6.0V < VDCIN < 24V, logic inputs = VL

VL < 3.2V, VCS = 12V

VL < 3.2V, VBATT = 12V

Output high or low

0 < IREF < 1mA

6.0V < VDCIN < 24V, no load

TA = +25°C

Output high or low

CONDITIONS

019

BATT, CS Input Voltage Range

µA

CS Input Current

µA

BATT Input Current

Ω

614

DLO On-Resistance

Ω

DHI On-Resistance

DCIN Quiescent Supply Current

624

DCIN Input Voltage Range

DHI Maximum Duty Cycle

kHz

270

300

330

Oscillator Frequency

mV/mA

REF Output Load Regulation

5.15

5.40

5.65

VL Output Voltage

4.17

4.2

4.23

REF Output Voltage

UNITS

MIN

TYP

MAX

PARAMETER

4V < VBATT < 16V

6.0V < VDCIN < 24V

±1.5

CS to BATT Offset Voltage (Note 1)

SETI = VREF (full scale)

170

185

205

CS to BATT

Current-Sense Voltage

Not including VADJ resistor tolerance

-0.65

0.65

Absolute Voltage Accuracy

With 1% tolerance VADJ resistors

4.16

4.2

4.24

-0.75

0.75

SWITCHING REGULATOR

SUPPLY AND REFERENCE

VL > 5.15V, VBATT = 12V

VL > 5.15V, VCS = 12V

400

500

SETI = 400mV

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