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MAX1684 Datasheet, PDF (5/16 Pages) Maxim Integrated Products – Low-Noise, 14V Input, 1A, PWM Step-Down Converters
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Low-Noise, 14V Input, 1A, PWM
Step-Down Converters
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
MAX1684
EFFICIENCY vs. LOAD CURRENT
(VIN = 3.3V, VOUT = 1.8V, 2.5V)
100
90
80
70
A
D
60
50 C
40
B
30
20
10
0
0.1
E
A: VOUT = 2.5V LP MODE
F
B: VOUT = 1.8V LP MODE
C: VOUT = 2.5V NORM MODE
D: VOUT = 1.8V NORM MODE
E: VOUT = 2.5V PWM MODE
F: VOUT = 1.8V PWM MODE
1
10
100 1,000 10,000
LOAD CURRENT (mA)
MAX1684
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V)
100
D
90
B
A
E
80 C
E
70
F
60
50
40
30
20
0.1
A: VIN = 6V LP MODE
B: VIN = 9V LP MODE
C: VIN = 12V LP MODE
D: VIN = 6V NORMAL MODE
E: VIN = 9V NORMAL MODE
F: VIN = 12V NORMAL MODE
1
10
100 1,000 10,000
LOAD CURRENT (mA)
MAX1685
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
100
C
90
A
80
D
70 B
60
50
40
30
20
10
0
0.1
A: VIN = 4V LP MODE
B: VIN = 12V LP MODE
C: VIN = 4V NORMAL MODE
D: VIN = 12V NORMAL MODE
1
10
100 1,000 10,000
LOAD CURRENT (mA)
MAX1684
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
100
90
A
C
80 B
D
70
60
50
40
30
20
10
0
0.1
A: VIN = 4V LOW-POWER MODE
B: VIN = 12V LOW-POWER MODE
C: VIN = 4V NORMAL MODE
D: VIN = 12V NORMAL MODE
1
10
100 1,000 10,000
LOAD CURRENT (mA)
MAX1684
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V, PWM MODE)
100
90
80
A
70
60
50
40
B
C
30
20
10
0
1
A: VIN = 6V
B: VIN = 9V
C: VIN =12V
10
100
1,000
LOAD CURRENT (mA)
10,000
MAX1685
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V PWM MODE)
100
90
80
70
VIN = 6V
60
VIN = 9V
50
40
30
20
VIN =12V
10
0
1
10
100
1,000
LOAD CURRENT (mA)
10,000
MAX1684
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, PWM MODE)
100
90
80
A
70
60 B
50
C
D
40
30
20
10
0
1
A: VIN = 4V
B: VIN = 5V
C: VIN = 9V
D: VIN = 12V
10
100 1,000
LOAD CURRENT (mA)
10,000
MAX1685
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V, PWM MODE)
100
90
80
VIN = 4V
70
60
VIN = 5V
50
40
VIN =9V
30
20
VIN = 12V
10
0
1
10
100
1,000
LOAD CURRENT (mA)
10,000
MAX1685
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V)
100
AB
90
80
E
D
CF
70
60
50
40
30
20
10
0
0.1
A: VIN = 6V LOW-POWER MODE
B: VIN = 9V LOW-POWER MODE
C: VIN = 12V LOW-POWER MODE
D: VIN = 6V NORMAL MODE
E: VIN = 9V NORMAL MODE
F: VIN =12V NORMAL MODE
1
10
100 1,000 10,000
LOAD CURRENT (mA)
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