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AMD Mobile Serial VID Dual-Phase
Fixed-Frequency Controller
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 2, V IN = 12V, V CC = V DD1 = V DD2 = SHDN = PGD_IN = 5V, V DDIO = 1.8V, PRO = OPTION = GNDS_NB = GNDS_ =
GND_, FBDC_ = FBAC_ = CSP_ = CSN_ = 1.2V, all DAC codes set to the 1.2V code, T A = -40°C to +105°C , unless otherwise noted.)
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
INPUT SUPPLIES
V IN
Drain of external high-side MOSFET
4
26
Input Voltage Range
V BIAS
V CC , V DD1 , V DD2
4.5
5.5
V
V DDIO
1.0
2.7
V CC Undervoltage-Lockout
Threshold
V DDIO Undervoltage-Lockout
Threshold
Quiescent Supply Current (V CC )
Quiescent Supply Currents
(V DD1 , V DD2 )
V UVLO
I CC
I DD1 , I DD2
V CC rising 50mV typical hysteresis
V DDIO rising 100mV typical hysteresis
Skip mode, FBDC_ forced above their
regulation points
Skip mode, FBDC_ forced above their
regulation points, T A = -40°C to +85°C
4.10
0.8
4.45
0.9
10
1
V
V
mA
μA
Quiescent Supply Current (V DDIO )
Shutdown Supply Current (V CC )
Shutdown Supply Currents
(V DD1 , V DD2 )
Shutdown Supply Current (V DDIO )
I DDIO
SHDN = GND, T A = -40°C to +85°C
SHDN = GND, T A = -40°C to +85°C
T A = -40°C to +85°C
25
1
1
1
μA
μA
μA
μA
Reference Voltage
Reference Load Regulation
V REF
V CC = 4.5V to 5.5V, no REF load
Sourcing: I REF = 0 to 500μA
Sinking: I REF = 0 to -100μA
1.98
-2
2.02
6.2
V
mV
MAIN SMPS CONTROLLERS
DAC codes from 0.8375V to 1.5500V
-0.6
+0.6
%
DC Output-Voltage Accuracy
(Note 1)
GNDS_ Input Range
GNDS_ Gain
Combined-Mode Detection
Threshold
V OUT
V GNDS_
A GNDS_
DAC codes from 0.5000V to 0.8250V
DAC codes from 0.4875V to 0.0125V
Separate mode
Separate: Δ V OUT _ / Δ V GNDS _ ,
-200mV ≤ V GNDS _ ≤ +200mV,
Combined: Δ V OUT / Δ V GNDS1,
-200mV ≤ V GNDS1 ≤ +200mV
GNDS2, detection after REFOK, latched,
cleared by cycling SHDN
-6
-15
-200
0.95
0.7
+6
+15
+200
1.05
0.9
mV
mV
V/V
V
R OSC = 143k Ω (f OSC = 300kHz nominal)
-7.5
+7.5
Switching-Frequency Accuracy
f OSC
R OSC = 35.7k Ω (f OSC = 1.2MHz nominal) to
432k Ω (f OSC = 99kHz nominal)
-10
+10
%
Maximum Duty Factor
Minimum On-Time
DMAX
t ONMIN
90
185
%
ns
TIME Slew-Rate Accuracy
During
transition
R TIME = 143k Ω , SR = 6.25mV/μs
R TIME = 35.7k Ω to 357k Ω ,
SR = 25mV/μs to 2.5mV/μs
-10
-15
+10
+15
%
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