High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
MAX1710/MAX1711
_____________________________Typical Operating Characteristics (continued)
(7A CPU supply circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
FREQUENCY vs. TEMPERATURE
(V
IN
= 15V, V
O
= 2.0V)
MAX1710-07
ON-TIME vs. TEMPERATURE
472
470
ON TIME (ns)
468
466
464
462
460
I
O
= 4A OR 7A
5
I
O
= 1A
MAX1710-08
CURRENT-LIMIT TRIP POINT
vs. TEMPERATURE
MAX1710-09
315
310
FREQUENCY (kHz)
305
300
295
290
TON = OPEN
285
-60
-40
-20
0
20
40
60
80
I
O
= 1A
I
O
= 4A
I
O
= 7A
474
30
25
CURRENT TRIP POINT (A)
20
15
I
LIM
= V
CC
10
I
LIM
= 400kΩ
458
456
100
-60
-40
-20
0
20
40
60
80
100
0
-60
-40
-20
0
20
I
LIM
= 100kΩ
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
CONTINUOUS TO DISCONTINUOUS
INDUCTOR CURRENT POINT
vs. INPUT VOLTAGE
MAX1710-10
INDUCTOR CURRENT PEAKS AND
VALLEYS vs. INPUT VOLTAGE
(AT CURRENT-LIMIT POINT)
MAX1710-11
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(SKIP MODE, f = 300kHz)
I
CC
MAX1710-12
0.9
0.8
0.7
LOAD CURRENT (A)
0.6
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
V
O
= 1.3V
V
O
= 2.0V
V
O
= 1.6V
14.0
13.5
I
PEAK
INDUCTOR CURRENT (A)
13.0
12.5
12.0
11.5
11.0
10.5
10.0
0
5
10
15
20
25
I
VALLEY
0.7
0.6
SUPPLY CURRENT (mA)
0.5
0.4
0.3
0.2
0.1
0
I
DD
0
5
10
15
20
25
I
BATT
30
30
30
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(SKIP MODE, f = 550kHz)
MAX1710-13
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(PWM MODE, f = 300kHz)
MAX1710-14
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(PWM MODE, f = 550kHz)
18
16
SUPPLY CURRENT (mA)
14
12
10
8
6
4
I
BAT
I
DD
MAX1710-15
0.7
0.6
SUPPLY CURRENT (mA)
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
I
DD
I
BATT
I
CC
20
18
16
SUPPLY CURRENT (mA)
14
12
10
8
6
4
2
0
I
CC
0
5
10
15
20
25
I
DD
20
I
BAT
2
0
30
0
5
I
CC
10
15
20
25
30
30
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
