Rainbow Electronics MAX8760 - Manual (Page 10)

MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
10 ______________________________________________________________________________________
OUTPUT OFFSET VOLTAGE
vs. OFS VOLTAGE
MAX8760 toc10
OFS VOLTAGE (V)
OUTPUT OFFSET VOLTAGE (mV)
1.5 0.5 1.0
-100
-50
0
50
100
150
-150
0 2.0
UNDEFINED
REGION
REFERENCE VOLTAGE
DISTRIBUTION
MAX8760 toc11
REFERENCE VOLTAGE (V)
SAMPLE PERCENTAGE (%)
2.005 1.995 2.000
10
20
30
40
50
0
1.990 2.010
SAMPLE SIZE = 100
CURRENT-BALANCE OFFSET
VOLTAGE DISTRIBUTION
MAX8760 toc12
OFFSET VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
1.25 -1.25 0
10
20
30
40
50
0
-2.50 2.50
SAMPLE SIZE = 100
CURRENT-LIMIT THRESHOLD
DISTRIBUTION
MAX8760 toc13
CURRENT LIMIT (mV)
SAMPLE PERCENTAGE (%)
10.5 9.5 10.0
10
20
30
40
50
0
9.0 11.0
V ILIM = 0.20V
SAMPLE SIZE = 100
60
-40
0.1 10 100 1k 1 10k
VOLTAGE-POSITIONING AMPLIFIER
GAIN AND PHASE vs. FREQUENCY
-20
-10
0
-30
MAX8760 toc14
FREQUENCY (Hz)
GAIN (dB)
PHASE (DEGREES)
10
20
30
40
50
180
-180
-108
-72
-36
-144
0
36
72
108
144
GAIN
PHASE
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 12V, V
CC
= V DD = 5V, SHDN = SKIP = V CC , D0–D5 set for 1.5V (SUS = GND), S0 and S1 set for 1V
(SUS = V CC ), OFS = GND, T A = +25°C, unless otherwise specified.)
VPS AMPLIFIER OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX8760 toc15
COMMON-MODE VOLTAGE (V)
3 4 1 2 0 5
OFFSET VOLTAGE (
µ
V)
20
40
60
80
100
120
140
160
180
0
VPS AMPLIFIER
DISABLED
INDUCTOR CURRENT DIFFERENCE
vs. LOAD CURRENT
MAX8760 toc16
LOAD CURRENT (A)
30 40 10 20 0 50
I L(CS)
- I
L(CM)
(A)
0.2
0.4
0.6
0.8
1.0
0
R SENSE = 1m Ω
SKIP = REF
SKIP = V CC