MAX8775ETJ+ datasheet(3/30 Pages) MAXIM

Part #	MAX8775ETJ+

Description	Dual and Combinable Graphics Core Controller for Notebook Computers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Dual and Combinable Graphics Core

Controller for Notebook Computers

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, VIN = 12V, SKIP_ = PGND = AGND, ON_ = VCC = 5V, separate mode, TA = 0°C to +85°C, unless otherwise

noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

50

%

SMPS1 to SMPS2 Phase Shift

SMPS2 starts after SMPS1

180

Deg

ISLEW_

During transition

4.0

4.75

5.5

Slew-Rate Current

ISLEWSS_

Startup and shutdown

0.70

0.95

1.20

µA

CURRENT LIMIT

Current-Limit Threshold

VLIMIT

VCSH_ - VCSL_

26

30

34

mV

Current-Limit Threshold

(Negative)

VNEG

VCSH_ - VCSL_, SKIP_ = VCC

-43

-36

-29

mV

Current-Limit Threshold

(Zero Crossing)

VZX

VCSH_ - VCSL_, SKIP_ = GND

3

mV

Idle Mode™ Threshold

IMIN

VCSH_ - VCSL_, SKIP_ = GND

3.6

6

8.4

mV

REFERENCE (REF)

TA = +25°C to +85°C

2.482

2.50

2.518

Reference Voltage

VREF

VCC = 4.5V to 5.5V,

IREF = 0

TA = 0°C to +85°C

2.475

2.50

2.525

V

Reference Source Load Regulation

ΔVREF

IREF = 0µA to 250µA

0.25

1.5

mV

Reference Sink Load Regulation

IREF = -50µA

6

mV

REF Lockout Voltage

VREF(UVLO) Rising edge, hysteresis = 100mV

2.3

V

CURRENT BALANCE

Current-Balance Amplifier (GMI)

Offset

[V(CSH1,CSL1) - V(CSH2,CSL2)] at ICCI = 0

-2

+2

mV

Current-Balance Amplifier (GMI)

Transconductance

ΔICCI/Δ[V(CSH1,CSL1) - V(CSH2,CSL2)],

VCCI = VOUT = 0.5V to 2.5V, and

V(CSH_,CSL_) = -60.0mV to +60.0mV

200

µS

FAULT DETECTION

OVP_ Adjust Range

VOVP_

0.5

2.5

V

Output Overvoltage Trip Threshold

Rising edge measured at CSL_,

with respect to OVP_ set voltage

180

200

220

mV

Output Overvoltage Fault

Propagation Delay

tOVP

50mV overdrive

10

µs

Output Undervoltage Protection

Trip Threshold

Falling edge measured at CSL_,

with respect to error comparator threshold

-325

300

-275

mV

Output Undevoltage Fault

Propagation Delay

tUVP

50mV overdrive

10

µs

Output Undervoltage Protection

Blanking Time

tBLANK

From rising edge of ON_

6144

1/fSW

PGOOD_ Lower Trip Threshold

Falling edge measured at CSL_,

with respect to error comparator threshold,

hysteresis = 1%

-180

-150

-120

mV

PGOOD_ Propagation Delay

tPGOOD_

Falling edge, 50mV overdrive

10

µs

Idle Mode is a trademark of Maxim Integrated Products, Inc.

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