MAX1887EEE Datasheet Download

Part No.:
MAX1887EEE
Download:
Download Datasheet
Description:
[SMPS Controller ]
File Size:
1015 K
Page:
33 Pages
Logo:
Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
 MAX1887EEE Datasheet Page:2MAX1887EEE Datasheet Page:3MAX1887EEE Datasheet Page:4MAX1887EEE Datasheet Page:5MAX1887EEE Datasheet Page:7MAX1887EEE Datasheet Page:8MAX1887EEE Datasheet Page:9MAX1887EEE Datasheet Page:10 
Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
MAX1887/MAX1897
Typical Operating Characteristics
(Circuit of Figure 1, V+ = 12V, V
CC
= V
DD
= 5V, V
OUT
= 1.3V (ZMODE = GND) and 1V (ZMODE = V
CC
),
SHDN
= V
CC
(MAX1897))
TWO-PHASE
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.3V)
MAX1887 toc01
TWO-PHASE
OUTPUT VOLTAGE vs. LOAD CURRENT
(V
OUT
= 1.3V, V
OFFSET
= -10mV)
1.29
1.28
OUTPUT VOLTAGE (V)
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
V
IN
= 12.0V
MAX1887 toc02
TWO-PHASE
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1V)
90
80
EFFICIENCY (%)
70
60
50
40
30
20
V
IN
= 20V
V
IN
= 12V
V
IN
= 8V
V
IN
= 5V
MAX1887 toc03
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
0.1
1
10
V
IN
= 20V
V
IN
= 12V
V
IN
= 8V
V
IN
= 5V
1.30
100
100
0
10
20
30
40
50
0.1
1
10
100
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
MAX1887 toc05
V
IN
= 12.0V
0.99
OUTPUT VOLTAGE (V)
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0
10
20
30
70
INPUT CURRENT (mA)
60
50
40
I
IN
30
20
10
MASTER AND SLAVE
0
0
5
10
15
20
25
I
BIAS
= I
DD
+ I
CC
INDUCTOR CURRENT OFFSET: I
LM
- I
LS
(A)
MAX1887 toc04
1.00
0.8
0.6
0.4
0.2
0
30
0
10
20
30
40
50
INPUT VOLTAGE (V)
LOAD CURRENT (A)
40
INDUCTOR CURRENT BALANCE
vs. INPUT VOLTAGE
MAX1887 toc07
OFFSET VOLTAGE DEVIATION vs.
CURRENT-SENSE COMMON-MODE VOLTAGE
OUT = CM+ = CM- = CS+ = CS-
OFFSET VOLTAGE DEVIATION (┬ÁV)
25
MAX1887 toc08
OFFSET VOLTAGE DEVIATION
vs. COMPENSATION VOLTAGE
OUT = CM+ = CM- = CS+ = CS-
OFFSET VOLTAGE DEVIATION (mV)
0.2
0.1
0
-0.1
-0.2
-0.3
MAX1887 toc09
0.7
0.6
I
OUT
= 40A
I
L(MASTER)
- I
L(SLAVE)
(A)
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
I
OUT
= NO LOAD
50
0.3
0
-25
-50
25
-0.5
0
0.5
1.0
1.5
2.0
INPUT VOLTAGE (V)
V
OUT
(V)
0
0.5
1.0
V
COMP
(V)
1.5
2.0
6
_______________________________________________________________________________________
MAX1887 toc06
TWO-PHASE
OUTPUT VOLTAGE vs. LOAD CURRENT
(V
OUT
= 1.0V, V
OFFSET
= -10mV)
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
80
1.0
INDUCTOR CURRENT BALANCE
vs. LOAD CURRENT