MAX8744AETJ View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX8744AETJ

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

Maxim Integrated 

High-Efficiency, Quad Output, Main Power-

Supply Controllers for Notebook Computers

ELECTRICAL CHARACTERISTICS (continued)

(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

Tri-Level Input Logic

Input Leakage Current

SYMBOL

CONDITIONS

SKIP, FSEL

High

REF

GND

SKIP, FSEL forced to GND or LDO5

SHDN forced to GND or 26V

MIN

VLDO5

- 0.4

1.65

TYP

-1

-1

MAX UNITS

V

2.35

0.5

+1

µA

+1

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 = -40°C to +85°C, unless otherwise noted.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX UNITS

INPUT SUPPLIES (Note 1)

VIN Input Voltage Range

VIN Operating Supply Current

LDO5 in regulation

5.4

VIN

IN = LDO5, VCSL5 < 4.4V

4.5

IIN LDO5 switched over to CSL5, either SMPS on

26.0

V

5.5

40

μA

VIN Standby Supply Current

VIN Shutdown Supply Current

IIN(STBY)

IIN(SHDN)

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

ISHDN

VIN = 6V to 26V

120

μA

20

μA

Quiescent Power Consumption

Both SMPS on, FB3 = FB5 = LDO5; SKIP =

PQ

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

VOUTA = 15V,

PIN + PCSL3 + PCSL5 + POUTA

4.5

mW

MAIN SMPS CONTROLLERS

3.3V Output Voltage in Fixed

Mode

VOUT3

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

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

3.255

3.375

V

5V Output Voltage in Fixed Mode

VOUT5

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

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

4.925

5.105

V

Feedback Voltage in Adjustable

Mode

VFB_

VIN = 6V to 26V, FB3 or FB5

duty factor = 20% to 80% (Note 2)

1.974

2.046

V

Output Voltage Adjust Range

Either SMPS

2.0

5.5

V

FB3, FB5 Dual Mode Threshold

3V

VLDO5 -

V

0.4

FSEL = GND

170

230

Operating Frequency (Note 1)

fOSC

FSEL = REF

FSEL = LDO5

270

330 kHz

425

575

Maximum Duty Factor

DMAX

97

%

6 _______________________________________________________________________________________

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