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 (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
SMPS1 to SMPS2 Phase Shift
SMPS2 starts after SMPS1
50
%
180
Deg
Slew-Rate Current
CURRENT LIMIT
ISLEW_ During transition
ISLEWSS_ Startup and shutdown
4.0 4.75 5.5
µA
0.70 0.95 1.20
Current-Limit Threshold
Current-Limit Threshold
(Negative)
VLIMIT
VNEG
VCSH_ - VCSL_
VCSH_ - VCSL_, SKIP_ = VCC
26
30
34
mV
-43
-36
-29
mV
Current-Limit Threshold
(Zero Crossing)
Idle Mode™ Threshold
REFERENCE (REF)
VZX
VCSH_ - VCSL_, SKIP_ = GND
IMIN
VCSH_ - VCSL_, SKIP_ = GND
3
mV
3.6
6
8.4
mV
Reference Voltage
VREF
VCC = 4.5V to 5.5V,
IREF = 0
TA = +25°C to +85°C
TA = 0°C to +85°C
2.482
2.475
2.50
2.50
2.518
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
Output Overvoltage Trip Threshold
VOVP_
Rising edge measured at CSL_,
with respect to OVP_ set voltage
0.5
2.5
V
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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