MAX8775ETJ Просмотр технического описания (PDF) - Maxim Integrated
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MAX8775ETJ Datasheet PDF : 30 Pages
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Dual and Combinable Graphics Core
Controller for Notebook Computers
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VIN = 12V, SKIP_ = 0, ON_ = VCC = 5V, separate mode, TA = -40°C to +85°C, unless otherwise noted.) (Note 6)
PARAMETER
INPUT SUPPLIES
Input Voltage Range
VCC Undervoltage Lockout
Quiescent Supply Current (VCC)
Quiescent Supply Current (VDD)
Shutdown Supply Current (VCC)
Shutdown Supply Current (VDD)
MAIN SMPS CONTROLLERS
SYMBOL
CONDITIONS
VIN
VBIAS
VUVLO
ICC
IDD
VCC, VDD
Rising edge, 200mV typical hysteresis
CSL_ forced above their regulation points
CSL_ forced above their regulation points
ON1 = ON2 = GND
ON1 = ON2 = GND
MIN TYP MAX UNITS
4
26
V
4.5
5.5
4.1
4.5
V
2.5
mA
5
µA
5
µA
5
µA
PWM_ Output Voltage
Output Voltage Adjust Range
REFIN Operating Voltage Adjust
Range
VREFIN_ -
VCSL_
VCSL_
With respect to REFIN_,
REFIN_ = 0.5V to 2.5V,
SKIP_ = VCC or GND (Note 1)
Either SMPS (Note 2)
VREFIN_ Either SMPS (Note 2)
-7.5
+7.5 mV
0.5
2.5
V
0.5
2.5
V
Combined Mode Enabled
Switching Frequency Accuracy
(Note 2)
Maximum Duty Factor
Slew-Rate Current
CURRENT LIMIT
Current-Limit Threshold
REFERENCE (REF)
Reference Voltage
Reference Source Load Regulation
Reference Sink Load Regulation
CURRENT BALANCE
Current-Balance Amplifier (GMI)
Offset
VREFIN2
fOSC
DMAX
ISLEW_
ISLEWSS_
VLIMIT
VREF
ΔVREF
ROSC = 143kΩ (fOSC = 300kHz nominal)
ROSC = 71.5kΩ (fOSC = 600kHz nominal) to
432kΩ (fOSC = 99kHz nominal)
During transition
Startup and shutdown
VCSH_ - VCSL_
VCC = 4.5V to 5.5V, IREF = 0
IREF = 0µA to 250µA
IREF = -50µA
[V(CSH1,CSL1) - V(CSH2,CSL2)] at ICCI = 0
3
-15
-20
90
3.75
0.7
25
2.462
-3
V
+15
%
+20
%
5.50
µA
1.2
35
mV
2.538
V
2
mV
10
mV
+3
mV
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