Typical operating characteristics (continued) – Rainbow Electronics MAX1712 User Manual
Page 6
MAX1710/MAX1711/MAX1712
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
6
_______________________________________________________________________________________
_____________________________Typical Operating Characteristics (continued)
(7A CPU supply circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
0
0.2
0.1
0.5
0.4
0.3
0.8
0.7
0.6
0.9
0
10
5
15
20
25
30
CONTINUOUS TO DISCONTINUOUS
INDUCTOR CURRENT POINT
vs. INPUT VOLTAGE
MAX1710-10
INPUT VOLTAGE (V)
LOAD CURRENT (A)
V
O
= 2.0V
V
O
= 1.6V
V
O
= 1.3V
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
0
10
5
15
20
25
30
INDUCTOR CURRENT PEAKS AND
VALLEYS vs. INPUT VOLTAGE
(AT CURRENT-LIMIT POINT)
MAX1710-11
INPUT VOLTAGE (V)
INDUCTOR CURRENT (A)
I
PEAK
I
VALLEY
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0
5
15
25
10
20
30
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(SKIP MODE, f = 300kHz)
MAX1710-12
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
CC
I
BATT
I
DD
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
0
10
20
30
5
15
25
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(SKIP MODE, f = 550kHz)
MAX1710-13
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
CC
I
BATT
I
DD
0
6
4
2
8
10
12
14
16
18
20
0
10
5
15
20
25
30
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(PWM MODE, f = 300kHz)
MAX1710-14
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
DD
I
BAT
I
CC
0
6
4
2
8
10
12
14
16
18
20
0
10
5
15
20
25
30
NO-LOAD SUPPLY CURRENTS
vs. INPUT VOLTAGE
(PWM MODE, f = 550kHz)
MAX1710-15
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
I
DD
I
BAT
I
CC
285
290
295
300
305
310
315
-60
-20
-40
0
20
40
60
80
100
FREQUENCY vs. TEMPERATURE
(V
IN
= 15V, V
O
= 2.0V)
MAX1710-07
TEMPERATURE (°C)
FREQUENCY (kHz)
I
O
= 7A
I
O
= 4A
I
O
= 1A
TON = OPEN
456
460
458
466
464
462
472
470
468
474
-60
0
20
-40
-20
40
60
80
100
ON-TIME vs. TEMPERATURE
MAX1710-08
TEMPERATURE (
°C)
ON-TIME (ns)
I
O
= 1A
I
O
= 4A OR 7A
0
5
10
15
20
25
30
-60
-20
-40
0
20
40
60
80
100
CURRENT-LIMIT TRIP POINT
vs. TEMPERATURE
MAX1710-09
TEMPERATURE (°C)
CURRENT TRIP POINT (A)
I
LIM
= 400k
Ω
I
LIM
= V
CC
I
LIM
= 100k
Ω