MAX1717 Maxim, MAX1717 Datasheet - Page 9

• Manufacturer Part Number: MAX1717
• Description: Dynamically Adjustable / Synchronous Step-Down Controller for Notebook CPUs
• Manufacturer: Maxim

(Circuit of Figure 1, components of Table 1, V+ = +12V, V
C
C
D
A
B
A
B
DYNAMIC OUTPUT VOLTAGE TRANSITION
A = V
B = INDUCTOR CURRENT, 10A/div
C = SKP/SDN, 5V/div
300kHz STANDARD APPLICATION, CIRCUIT 1,
PWM MODE, V
I
A = V
B = INDUCTOR CURRENT, 10A/div
C = VGATE, 5V/div
D = A/B, 5V/div
OUT
300kHz VOLTAGE POSITIONED,
CIRCUIT 2, PWM MODE,
NO LOAD
= 12A, R
OUT
OUT
, 1V/div
, 200mV/div, AC-COUPLED
STARTUP WAVEFORM
TIME
OUT
= 120kΩ
= 1.35V TO 1.6V,
100µs/div
50µs/div
Step-Down Controller for Notebook CPUs
_______________________________________________________________________________________
Dynamically Adjustable, Synchronous
C
D
C
A
B
A
B
Typical Operating Characteristics (continued)
DYNAMIC OUTPUT VOLTAGE TRANSITION
1000kHz +5V, CIRCUIT 4,
PWM MODE, V
I
A = V
B = INDUCTOR CURRENT, 10A/div
C = VGATE, 5V/div
D = A/B, 5V/div
A = V
B = INDUCTOR CURRENT, 10A/div
C = SKP/SDN, 5V/div
OUT
300kHz VOLTAGE POSITIONED,
CIRCUIT 2, I
= 0.3A, R
OUT
DD
OUT
, 200mV/div, AC-COUPLED
, 1V/div
= V
STARTUP WAVEFORM
OUT
TIME
OUT
CC
=12A
= 51kΩ
= 1.35V TO 1.6V,
= SKP/SDN = +5V, V
100µs/div
20µs/div
OUT
= 1.6V, T
C
D
A
B
A
B
DYNAMIC OUTPUT VOLTAGE TRANSITION
A
300kHz STANDARD APPLICATION, CIRCUIT 1,
PWM MODE, V
R
A = V
B = INDUCTOR CURRENT, 10A/div
C = VGATE, 5V/div
D = A/B, 5V/div
A = V
B = INDUCTOR CURRENT, 10A/div
TIME
= +25°C, unless otherwise noted.)
OUTPUT OVERLOAD WAVEFORM
OUT
OUT
= 120kΩ
300kHz VOLTAGE POSITIONED, CIRCUIT 2,
, 200mV/div, AC-COUPLED
, 500mV/div
OUT
= 1.35V TO 1.6V, I
50µs/div
40µs/div
OUT
PWM MODE
= 0.3A,
9