Typical operating characteristics (continued) – Rainbow Electronics MAX17008 User Manual
Page 9
MAX17007A/MAX17008
Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
_______________________________________________________________________________________
9
SMPS2 MAXIMUM OUTPUT CURRENT
vs. TEMPERATURE
MAX17007A/8 toc10
TEMPERATURE (
°C)
MAXIMUM OUTPUT CURRENT (A)
80
40
0
11
12
13
14
10
-40
120
60
20
-20
100
V
IN
= 12V
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX17007A/8 toc11
INPUT VOLTAGE (V)
SUPPLY CURRERT (I
BIAS
) (mA)
20
16
4
8
12
16
0
6
10
14
2
4
24
8
12
SKIP MODE
PWM MODE
ULTRASONIC MODE
EN1 = HIGH
EN2 = LOW
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
MAX17007A/8 toc12
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
20
16
0.1
1
10
100
0.01
4
24
8
12
18
14
22
6
10
SKIP MODE
PWM MODE
ULTRASONIC MODE
EN1 = HIGH
EN2 = LOW
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
MAX17007A/8 toc13
REFERENCE LOAD CURRENT (
μA)
REFERENCE VOLTAGE (V)
80
60
1.99
1.97
2.01
2.03
2.05
1.95
-20
100
20
40
0
REFIN1 TO CSL1 OFFSET VOLTAGE
DISTRIBUTION
MAX17007A/8 toc14
OFFSET VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
3.0
60
50
70
80
20
10
30
40
90
0
-5.0
5.0
-1.0
1.0
-3.0
SAMPLE SIZE = 100
T
A
= +85
°C
T
A
= +25
°C
SMPS1 PRESET 1.05V
VOLTAGE DISTRIBUTION
MAX17007A/8 toc15
SMPS1 VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
1.053
60
50
70
80
20
10
30
40
90
0
1.045
1.055
1.049
1.051
1.047
SAMPLE SIZE = 100
T
A
= +85
°C
T
A
= +25
°C
SMPS2 PRESET 1.5V
VOLTAGE DISTRIBUTION
MAX17007A/8 toc16
SMPS2 VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
1.503
15
10
20
25
5
30
0
1.495
1.505
1.499
1.501
1.497
SAMPLE SIZE = 100
T
A
= +85
°C
T
A
= +25
°C
COMBINED-MODE CURRENT BALANCE
vs. LOAD CURRENT
MAX17007A/8 toc17
LOAD CURRENT (A)
V
CSH -
V
CSL
(mV)
20
15
5
25
10
50
40
20
10
30
0
0
30
SMPS1
SMPS2
SOFT-START WAVEFORM
MAX17007A/8 toc18
400
μs/div
A
B
E
F
C
D
5V
A. EN1, EN2, 5V/div
B. REF, 2V/div
C. V
OUT1
, 1V/div
D. V
OUT2
, 1V/div
E. PGOOD1, 5V/div
F. PGOOD2, 5V/div
0
2V
0
5V
0
0
5V
0
1.05V
1.5V
0
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 12V, V
DD
= 5V, SKIP = GND, T
A
= +25°C, unless otherwise noted.)