MAX1717 Maxim, MAX1717 Datasheet - Page 8

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

Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
8
(Circuit of Figure 1, components of Table 1, V+ = +12V, V
1000
800
600
400
200
_______________________________________________________________________________________
40
30
20
10
A
B
0
0
5
5
A = V
B = INDUCTOR CURRENT, 10A/div
1000kHz VOLTAGE POSITIONED, CIRCUIT 5,
SKIP MODE
550kHz VOLTAGE POSITIONED, CIRCUIT 3,
PWM MODE
1000kHz VOLTAGE POSITIONED,
CIRCUIT 5, PWM MODE
OUT
LOAD-TRANSIENT RESPONSE
NO-LOAD SUPPLY CURRENT
NO-LOAD SUPPLY CURRENT
, 50mV/div, AC-COUPLED
10
10
vs. INPUT VOLTAGE
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
5µs/div
15
15
I
I+
20
20
CC
I
CC
+ I
I+
+ I
DD
DD
25
25
Typical Operating Characteristics (continued)
40
30
20
10
A
B
A
B
0
5
A = V
B = INDUCTOR CURRENT, 10A/div
A = V
B = INDUCTOR CURRENT, 10A/div
300kHz VOLTAGE POSITIONED,
CIRCUIT 2, PWM MODE
300kHz STANDARD APPLICATION, CIRCUIT 1,
PWM MODE
1000kHz +5V, CIRCUIT 4, PWM MODE
DD
OUT
OUT
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE
NO-LOAD SUPPLY CURRENT
= V
, 50mV/div, AC-COUPLED
, 50mV/div, AC-COUPLED
10
vs. INPUT VOLTAGE
CC
INPUT VOLTAGE (V)
= SKP/SDN = +5V, V
10µs/div
4µs/div
15
I
I+
20
CC
+ I
DD
OUT
25
= 1.6V, T
40
30
20
10
A
B
A
B
0
A
A = V
B = INDUCTOR CURRENT, 10A/div
5
A = V
B = INDUCTOR CURRENT, 10A/div
1000kHz VOLTAGE POSITIONED, CIRCUIT 5,
PWM MODE
300kHz VOLTAGE POSITIONED,
CIRCUIT 2, PWM MODE
550kHz VOLTAGE POSITIONED,
CIRCUIT 3, PWM MODE
= +25°C, unless otherwise noted.)
OUT
OUT
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE
NO-LOAD SUPPLY CURRENT
, 50mV/div, AC-COUPLED
, 50mV/div, AC-COUPLED
10
vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
10µs/div
4µs/div
15
I
I+
20
CC
+ I
DD
25