Datasheet

MAX1714
High-Speed Step-Down Controller
for Notebook Computers
6 _______________________________________________________________________________________
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 1, V
IN
= +15V, SKIP = AGND, TON = unconnected, T
A
= +25°C, unless otherwise noted.)
0
2
1
3
4
5
6
7
8
9
010515202530
INDUCTOR CURRENT PEAKS AND VALLEYS
vs. INPUT VOLTAGE (4A COMPONENTS,
AT CURRENT-LIMIT TRIP POINT)
MAX1714B-09
INPUT VOLTAGE (V)
INDUCTOR CURRENT (A)
I
PEAK
I
VALLEY
0
200
400
600
800
010203051525
NO-LOAD SUPPLY CURRENT
(4A COMPONENTS, SKIP MODE, 300kHz)
MAX1714B-10
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
I
CC
I
IN
I
DD
10
8
0
05 20 30
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
(4A COMPONENTS, PWM MODE, 300kHz)
4
6
2
MAX1714B-11
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
10 15 25
I
CC
I
DD
I
IN
0
200
100
400
300
500
600
4.0 5.04.5 5.5 6.0
NO-LOAD SUPPLY CURRENT vs. INPUT
VOLTAGE (1.5A COMPONENTS,
SKIP MODE, V
OUT
= 2.5V, 600kHz)
MAX1714B-12
V
CC
, V
DD
, V
IN
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
I
CC
I
DD
I
IN
0
12
10
2
4
8
6
I
OUT
AT CURRENT LIMIT
vs. TEMPERATURE
(4A COMPONENTS, V
OUT
= 2.5V)
MAX1714B-07
TEMPERATURE (°C)
OUTPUT CURRENT (A)
-40
20 40-20 0 60 80
V
ILIM
= 1V
V
ILIM
= 0.5V
0
200
100
300
400
500
600
700
010515202530
CONTINUOUS TO DISCONTINUOUS INDUCTOR
CURRENT POINT vs. INPUT VOLTAGE
(4A COMPONENTS, V
OUT
= 2.5V)
MAX1714B-08
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
300
0
0.01 1010.1
FREQUENCY vs. LOAD CURRENT
(4A COMPONENTS, V
OUT
= 2.5V)
100
50
250
200
350
150
MAX1714B-04
LOAD CURRENT (A)
FREQUENCY (kHz)
V
IN
= 7V, 15V, PWM MODE
V
IN
= 15V
SKIP MODE
V
IN
= 7V
SKIP MODE
280
290
300
310
320
FREQUENCY vs. INPUT VOLTAGE
(4A COMPONENTS, V
OUT
= 2.5V, I
OUT
= 1A)
MAX1714B-05
INPUT VOLTAGE (V)
FREQUENCY (kHz)
0
10 15520
3025
TEMPERATURE (°C)
FREQUENCY (kHz)
300
310
305
320
315
330
325
FREQUENCY vs. TEMPERATURE
(4A COMPONENTS, V
OUT
= 2.5V)
MAX1714B-06
-40
20 40-20 0 60 80
I
OUT
= 4A
I
OUT
= 1A