Dual Step-Down Controllers Plus Linear-

Regulator Controller for Notebook Computers

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

V+ to AGND............................................................-0.3V to +30V

PGND, GDS to AGND .........................................................

±0.3V

SKP1/SDN, SKP2/SDN, LIN/SDN to AGND............-0.3V to +16V

LINBSE, SUS, PERF, DPSLP, PGOOD,

LINGOOD, CS1+, CS1-, FBS, D0–D4,

OUT2 to AGND.....................................................-0.3V to +6V

OFS0, OFS1, OFS2, ILIM1, ILIM2,

FB2, REF, TON, TIME, OVPSET, S0, S1,

BST1 to LX1..............................................................-0.3V to +6V

BST2 to LX2..............................................................-0.3V to +6V

LX1, LX2, CS2 to AGND ............................................-2V to +30V

REF Short Circuit to AGND.........................................Continuous

LINBSE Short Circuit to +6V.......................................Continuous

°C)

48-Pin Thin QFN (derate 26.3mW/

°C above +70°C) .2105mW

Operating Temperature Range .........................-40

°C to +100°C

Junction Temperature ......................................................+150

°C

Storage Temperature Range .............................-65

°C to +150°C

Lead Temperature (soldering, 10s) .................................+300

°C

ELECTRICAL CHARACTERISTICS

°C, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

228

Battery voltage V+

TON = GND

2

16

Input Voltage Range

4.5

5.5

V

DAC codes from 0.600V to

1.750V (MAX1816)

BUCK1 DC Output Voltage

Accuracy

V+ = 4.5V to 28V,

includes load

regulation errors,

OFS_ = GDS = AGND,

CS1+ = CS1- = FBS

DAC codes from 0.700V to

2.000V (MAX1994)

-1

+1

%

FB2 = GND

2.475

2.500

2.525

1.782

1.800

1.818

BUCK2 Error Comparator Threshold

(DC Output Voltage Accuracy)

(Note 1)

V+ = 4.5V to 28V

FB2 = OUT2

0.990

1.000

1.010

V

OUT2 Adjust Range

1.0

5.5

V

FB2 GND Level

Voltage level to enable internal feedback for BUCK2

0.05

V

FB2 External Feedback Level

Voltage level to enable external feedback for BUCK2

with FB2 regulated to 1.0V nominal

0.15

1.90

V

Voltage level to enable internal feedback for BUCK2

2.10

V

GAIN = GND

0

GAIN = REF

1.425

1.500

1.575

GAIN = open

1.900

2.000

2.100

Voltage-Positioning Gain

3.800

4.000

4.200

V/V