MAX8720 Datasheet, PDF (9/31 Pages) Maxim Integrated Products – Dynamically Adjustable 6-Bit VID Step-Down Controller

Dynamically Adjustable 6-Bit VID
Step-Down Controller
Typical Operating Characteristics (continued)
(MAX8720 Circuit of Figure 1, V_IN = 12V, V_DD = V_CC = 5V, TON = open, T_A = +25°C, unless otherwise noted.)
DYNAMIC OUTPUT VOLTAGE TRANSITION
(PWM MODE)
MAX8720 toc14
SUSPEND TRANSITION
(SKIP MODE)
MAX8720 toc15
1.65V
A
1.25V
A
1.25V
12V
B
0
C
0
10A
D
0
-10A
50µs/div
SKIP = V_CC, I_OUT = 0.2A
A = V_OUT, 200mV/div C = D4, 5V/div
B = LX, 10V/div
D = INDUCTOR CURRENT, 10A/div
SUSPEND TRANSITION
(PWM MODE)
MAX8720 toc16
1.25V
A
0.65V
12V
0
B
5V
C
0
10A
D
0
-10A
100µs/div
SKIP = V_CC, I_OUT = 0.2A
A = V_OUT, 500mV/div C = D4, 5V/div
B = LX, 10V/div
D = INDUCTOR CURRENT, 10A/div
0.65V
12V
0
B
5V
C
0
10A
D
0
-10A
100µs/div
SKIP = GND, I_OUT = 0.2A
A = V_OUT, 500mV/div C = D4, 5V/div
B = LX, 10V/div
D = INDUCTOR CURRENT, 10A/div
OUTPUT VOLTAGE DISTRIBUTION
25
V_OUT = 1.25V
20
15
10
5
0
-0.48
-0.24
0.00
0.24 0.48
OUTPUT VOLTAGE ERROR (%)
REFERENCE VOLTAGE DISTRIBUTION
25
20
15
10
5
0
1.995
1.998 2.000 2.002 2.005
REFERENCE VOLTAGE (V)
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