MAX8543EEE datasheet(2/27 Pages) MAXIM

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Step-Down Controllers with Prebias Startup,

Lossless Sensing, Synchronization, and OVP

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = 13.2V, VBST - VLX = 5V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

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.

IN, EN, CS+, CS- to GND .......................................-0.3V to +14V

BST, DH to LX ..........................................................-0.3V to +6V

BST to GND ............................................................-0.3V to +20V

DL, COMP, ILIM2, SS, SYNCO,

FSYNC to GND .......................................-0.3V to (VVL + 0.3V)

VL, FB, POK, ILIM1, ILIM, MODE to GND ................-0.3V to +6V

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

Continuous Power Dissipation (TA = +70

°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C) .......666.7mW

20-Pin QSOP (derate 9.1mW/°C above +70°C) .......727.3mW

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Input Voltage Range

VL connected to IN for VIN < 5.5V

3.0

13.2

Quiescent Supply Current

VFB = 0.9V, no switching

EN = GND, MODE = GND, IN not connected to VL

Shutdown Supply Current

EN = GND, VL = IN, MODE = GND

µA

VL Undervoltage-Lockout Trip Level

VVL rising, typical hysteresis is 80mV

2.52

2.7

2.88

Output Voltage Adjust Range (VOUT)

(Note 1)

0.8

VL Output Voltage

5.5V < VIN < 13.2V, 1mA < IVL < 75mA

4.5

5.5

VL Output Current

VOLTAGE REFERENCE

SS Shutdown Resistance

From SS to GND, VEN = 0V

100

Ω

SS Soft-Start Current

VREF = 0.625V

µA

Soft-Start Ramp Time

Output from 0% to 100%, CREF = 0.01µF to 1µF

ms/µF

ERROR AMPLIFIER

FB Regulation Voltage

0.792

0.8

0.808

Transconductance

110

160

µS

COMP Shutdown Resistance

From COMP to GND, VEN = 0V

100

Ω

FB Input Leakage Current

VFB = 0.9V

100

FB Input Common-Mode Range

-0.1

+0.9

CURRENT-SENSE AMPLIFIER

VILIM1 = 0V

8.8

13.2

VILIM1 = (1/3)VVL

4.8

7.2

VILIM1 = (2/3)VVL

3.2

4.8

Voltage Gain

VOUT = 0 to 13V

VILIM1 = VVL

2.4

3.6

V/V

CURRENT LIMIT

ILIM2 Output Current (MAX8544 Only)

RILIM2 = 50k

Ω to 200kΩ

4.5

5.5

µA

ILIM1 Input Current

VILIM1 = 0V or VVL

-1

µA

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