Typical operating characteristics – Rainbow Electronics MAX1855 User Manual
Page 7
MAX1716/MAX1854/MAX1855
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
_______________________________________________________________________________________
7
MAX1716-01
100
50
0.01
10.1
1
10
100
EFFICIENCY vs. LOAD CURRENT
(2.0V AT 300kHz)
60
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
A1
C1
D1
A2
B2
C2
D2
MAX1854 ONLY
B1
MAX1716-02
100
B1
D1
D2
50
0.01
10.1
1
10
100
EFFICIENCY vs. LOAD CURRENT
(1.6V AT 300kHz)
60
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
A1
C1
A2
B2
C2
SKIP MODE (SKIP = GND)
A1: V
BATT
= 4.5V
B1: V
BATT
= 7V
C1: V
BATT
= 15V
D1: V
BATT
= 24V
PWM MODE (SKIP = V
CC
)
A2: V
BATT
= 4.5V
B2: V
BATT
= 7V
C2: V
BATT
= 15V
D2: V
BATT
= 24V
100
50
0.01
0.1
1
10
100
EFFICIENCY vs.
LOAD CURRENT (1.3V AT 200kHz)
60
MAX1716-03
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
CIRCUIT #2
L = 1.5
µH
D2
C2
A2
B2
C1
B1
A1
D1
100
50
0.01
0.1
1
10
100
EFFICIENCY vs.
LOAD CURRENT (1.3V AT 300kHz)
60
MAX1716-04
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
CIRCUIT #2
L = 1.0
µH
C2
D2
A2
B2
D1
C1
B1
A1
100
50
0.01
0.1
1
10
100
EFFICIENCY vs.
LOAD CURRENT (1.3V AT 550kHz)
60
MAX1716-05
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
D2
C2
D1
B2
A2
C1
B1
A1
CIRCUIT #2
L = 0.68
µH
100
50
0.01
0.1
1
10
100
EFFECTIVE EFFICIENCY vs.
LOAD CURRENT (1.3V AT 200kHz)
60
MAX1716-06
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
CIRCUIT #2
L = 1.5
µH
D2
C2
B2
A2
A1
B1
C1
D1
100
50
0.01
0.1
1
10
100
EFFECTIVE EFFICIENCY vs.
LOAD CURRENT (1.3V AT 300kHz)
60
MAX1716-07
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
D2
C2
B2
A2
C1
B1
A1
D1
CIRCUIT #2
L = 1.0
µH
100
50
0.01
0.1
1
10
100
EFFECTIVE EFFICIENCY vs.
LOAD CURRENT (1.3V AT 550kHz)
60
MAX1716-08
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
85
75
65
55
95
D2
C2
B2
A2
C1
B1
A1
D1
CIRCUIT #2
L = 0.68
µH
Typical Operating Characteristics
(Circuit from Figure 1, components from Table 2, T
A
= +25°C, unless otherwise noted.)