MAX1887EEE Maxim Integrated Products, MAX1887EEE Datasheet - Page 8

• Manufacturer Part Number: MAX1887EEE
• Description: Current Mode PWM Controllers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1887EEE

• Number Of Outputs: 1
• Mounting Style: SMD/SMT
• Package / Case: QSOP-16
• Switching Frequency: 550 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: No
• Topology: Boost

Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
8
(Circuit of Figure 1, V+ = 12V, V
_______________________________________________________________________________________
1.282V
20A
10V
40A
5A
0
0
0
A. OUTPUT VOLTAGE, V
B. MASTER/SLAVE INDUCTOR CURRENTS
C. MASTER/SLAVE LX WAVEFORMS,
V
A. LOAD CURRENT, I
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
V
IN
IN
= 12.0V, I
= 12.0V, POL = V
SWITCHING WAVEFORMS
CC
OUT
LOAD TRANSIENT
(OUT-OF-PHASE)
(OUT-OF-PHASE)
= V
= 40A, POL = V
DD
CC
20µs/div
OUT
1µs/div
OUT
(MAX1897)
OUT
= 5A TO 40A
= 5V, V
= 1.290V (NO LOAD),
= 1.290V (NO LOAD)
CC
(MAX1897)
Typical Operating Characteristics (continued)
OUT
MAX1887 toc14
MAX1887 toc16
= 1.3V (ZMODE = GND) and 1V (ZMODE = V
A
20mV/div
B
5A/div
C
10V/div
A
40A/div
B
50mV/div
C
10A/div
D
10A/div
1.282V
20A
10V
40A
5A
0
0
0
A. OUTPUT VOLTAGE, V
B. MASTER/SLAVE INDUCTOR CURRENTS
C. MASTER/SLAVE LX WAVEFORMS,
V
A. LOAD CURRENT, I
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
V
IN
IN
= 12.0V, I
= 12.0V, POL = GND (MAX1897)
SWITCHING WAVEFORMS
OUT
LOAD TRANSIENT
= 40A, POL = GND (MAX1897)
(IN-PHASE)
(IN-PHASE)
20µs/div
1µs/div
OUT
OUT
OUT
= 5A TO 40A
= 1.290V (NO LOAD),
= 1.290V (NO LOAD)
CC
MAX1887 toc15
MAX1887 toc17
), SHDN = V
A
20mV/div
B
5A/div
C
10V/div
A
40A/div
B
50mV/div
C
10A/div
D
10A/div
CC
(MAX1897))