High-Efficiency, 10-Pin µMAX, Step-Down

Controllers for Notebooks

2

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ABSOLUTE MAXIMUM RATINGS

VP to VL ..................................................................-0.3V to +22V

OUT, VL to GND .......................................................-0.3V to +6V

DL, FB, REF to GND ....................................-0.3V to (VL + 0.3V)

DH to GND....................................................-0.3V to (VP + 0.3V)

CS to GND ....................................................-2.0V to (VP + 0.3V)

REF Short Circuit to GND ...........................................Continuous

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

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

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

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

ELECTRICAL CHARACTERISTICS

°C.)

(Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VP Input Voltage Range

520

V

VL Input Voltage Range

VL (overdriven)

4.75

5.25

V

OUT Output Voltage

(MAX1762, 1.8V Fixed)

FB = GND, continuous conduction mode

1.773

1.8

1.827

V

OUT Output Voltage

(MAX1762, 2.5V Fixed)

FB = VL, continuous conduction mode

2.463

2.5

2.538

V

OUT Output Voltage

(MAX1791, 3.3V Fixed)

FB = GND, continuous conduction mode

3.250

3.3

3.350

V

OUT Output Voltage

(MAX1791, 5V Fixed)

FB = VL, continuous conduction mode

4.925

5

5.075

V

OUT Output Voltage (Adj Mode)

FB = OUT, continuous conduction mode

1.231

1.250

1.269

V

Output Voltage Adjust Range

0.5

5.5

V

OUT Input Resistance

Adjustable-output mode

300

800

1700

k

Ω

FB Input Bias Current

-0.1

0.1

µA

Soft-Start Ramp Time

1700

µs

666

740

814

On-Time (Note 2)

2550

2830

3110

ns

Minimum Off-Time

(Note 2)

300

400

500

ns

VL Quiescent Supply Current

regulation point

153

260

µA

227

410

VP Quiescent Supply Current

FB = GND, OUT forced

above the regulation point,

93

200

µA

VL Shutdown Supply Current

2

15

µA

VP Shutdown Supply Current

412

µA

VL Output Voltage

4.5

4.65

4.75

V

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.