MAX1887 查看數據表（PDF） - Maxim Integrated
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MAX1887 Datasheet PDF : 33 Pages
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Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
Typical Operating Characteristics
(Circuit of Figure 1, V+ = 12V, VCC = VDD = 5V, VOUT = 1.3V (ZMODE = GND) and 1V (ZMODE = VCC), SHDN = VCC (MAX1897))
TWO-PHASE
EFFICIENCY vs. LOAD CURRENT
(VOUT = 1.3V)
100
90
VIN = 8V
80
VIN = 5V
70
60
VIN = 12V
50
40
VIN = 20V
30
20
0.1
1
10
100
LOAD CURRENT (A)
TWO-PHASE
OUTPUT VOLTAGE vs. LOAD CURRENT
(VOUT = 1.3V, VOFFSET = -10mV)
1.30
1.29
VIN = 12.0V
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
0
10
20
30
40
50
LOAD CURRENT (A)
TWO-PHASE
EFFICIENCY vs. LOAD CURRENT
(VOUT = 1V)
100
90
VIN = 8V
80
VIN = 5V
70
60
VIN = 12V
50
40
VIN = 20V
30
20
0.1
1
10
100
LOAD CURRENT (A)
TWO-PHASE
OUTPUT VOLTAGE vs. LOAD CURRENT
(VOUT = 1.0V, VOFFSET = -10mV)
1.00
VIN = 12.0V
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0
10
20
30
40
INDUCTOR CURRENT BALANCE
vs. INPUT VOLTAGE
0.7
0.6
IOUT = 40A
0.5
0.4
0.3
0.2
IOUT = NO LOAD
0.1
0
0
5
10
15
20
25
INPUT VOLTAGE (V)
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
80
70
60
IBIAS = IDD + ICC
50
40
IIN
30
20
10
MASTER AND SLAVE
0
0 5 10 15 20 25 30
INPUT VOLTAGE (V)
OFFSET VOLTAGE DEVIATION vs.
CURRENT-SENSE COMMON-MODE VOLTAGE
50
OUT = CM+ = CM- = CS+ = CS-
25
0
-25
-50
-0.5
0
0.5 1.0 1.5 2.0
VOUT (V)
INDUCTOR CURRENT BALANCE
vs. LOAD CURRENT
1.0
0.8
0.6
0.4
0.2
0
0
10
20
30
40
50
LOAD CURRENT (A)
OFFSET VOLTAGE DEVIATION
vs. COMPENSATION VOLTAGE
0.3
OUT = CM+ = CM- = CS+ = CS-
0.2
0.1
0
-0.1
-0.2
-0.3
0
0.5
1.0
1.5
2.0
VCOMP (V)
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