MAX8744A View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX8744A

High-Efficiency, Quad Output, Main Power Supply Controllers for Notebook Computers

Maxim Integrated 

High-Efficiency, Quad Output, Main Power-

Supply Controllers for Notebook Computers

ABSOLUTE MAXIMUM RATINGS

IN, SHDN, DRVA, OUTA to GND............................-0.3V to +28V

LDO5, ON3, ON5, ONA to GND ..............................-0.3V to +6V

PGOODA, PGOOD3, PGOOD5 to GND...................-0.3V to +6V

CSL3, CSH3, CSL5, CSH5 to GND ..........................-0.3V to +6V

REF, FB3, FB5, FBA to GND...................-0.3V to (VLDO5 + 0.3V)

SKIP, FSEL, ILIM to GND........................-0.3V to (VLDO5 + 0.3V)

DL3, DL5 to PGND..................................-0.3V to (VLDO5 + 0.3V)

BST3, BST5 to PGND .............................................-0.3V to +34V

BST3 to LX3..............................................................-0.3V to +6V

DH3 to LX3 ..............................................-0.3V to (VBST3 + 0.3V)

BST5 to LX5..............................................................-0.3V to +6V

DH5 to LX5 ..............................................-0.3V to (VBST5 + 0.3V)

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

BST3, BST5 to LDO5 .............................................-0.3V to +0.3V

LDO Short Circuit to GND ..........................................Momentary

REF Short Circuit to GND ...........................................Momentary

DRVA Current (Sinking) ......................................................30mA

OUTA Shunt Current ...........................................................30mA

Continuous Power Dissipation (TA = +70°C)

Multilayer PCB

32-Pin, 5mm x 5mm TQFN

(derated 34.5mW/°C above +70°C) .........................2459mW

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

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.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, VIN = 12V, both SMPS enabled, FSEL = REF, SKIP = GND, ILIM = LDO5, FBA = LDO5, IREF = ILDO5 = IOUTA =

no load, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

INPUT SUPPLIES (Note 1)

VIN Input Voltage Range

VIN Operating Supply Current

VIN Standby Supply Current

VIN Shutdown Supply Current

Quiescent Power Consumption

MAIN SMPS CONTROLLERS

3.3V Output Voltage in Fixed

Mode

5V Output Voltage in Fixed Mode

Feedback Voltage in Adjustable

Mode (Note 2)

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

LDO5 in regulation

5.4

VIN

IN = LDO5, VCSL5 < 4.4V

4.5

IIN

LDO5 switched over to CSL5, either

SMPS on

IIN(STBY)

IIN(SHDN)

VIN = 6V to 26V, both SMPS off, includes

ISHDN

VIN = 6V to 26V

Both SMPS on, FB3 = FB5 = LDO5,

PQ

SKIP = GND, VCSL3 = 3.5V, VCSL5 = 5.3V,

VOUTA = 15V,

PIN + PCSL3 + PCSL5 + POUTA

26.0

V

5.5

20

36

µA

65

120

µA

8

20

µA

3.5

4.5

mW

VOUT3

VOUT5

VFB_

VIN = 6V to 26V, SKIP = FB3 = LDO5,

0 < VCSH3 - VCSL3 < 50mV (Note 2)

VIN = 6V to 26V, SKIP = FB5 = LDO5,

0 < VCSH5 - VCSL5 < 50mV (Note 2)

VIN = 6V to 26V, FB3 or FB5

duty factor = 20% to 80%

VIN = 6V to 26V, FB3 or FB5

duty factor = 50%

3.265 3.315 3.365

V

4.94 5.015 5.09

V

1.980 2.010 2.040

V

1.990 2.010 2.030

2 _______________________________________________________________________________________

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