MAX1887EEE Maxim Integrated Products, MAX1887EEE Datasheet - Page 9

• 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

(Circuit of Figure 1, V+ = 12V, V
_______________________________________________________________________________________
5.0V
1.3V
1.1V
5V
1V
0
0
0
0
0
0
0
DYNAMIC OUTPUT VOLTAGE TRANSITION
A. ZMODE = 0 TO 5V
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
A. MASTER SHUTDOWN, V
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
OR 1.10V (ZMODE = V
SHUTDOWN WAVEFORM
CC
= V
100µs/div
40µs/div
DD
OUT
OUT
CC
= 5V, V
Quick-PWM Slave Controllers for
)
SHDN
Multiphase, Step-Down Supplies
= 1.30V (ZMODE = GND)
= 1.290V (NO LOAD)
= 5V TO 0
Typical Operating Characteristics (continued)
OUT
MAX1887 toc18
MAX1887 toc20
= 1.3V (ZMODE = GND) and 1V (ZMODE = V
A
5V/div
B
200mV/div
C
10A/div
D
10A/div
A
5V/div
B
1.0V/div
C
10A/div
D
10A/div
5V
5V
1V
0
0
0
0
0
0
0
0
A. MASTER SHUTDOWN, V
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
A. MASTER SHUTDOWN, V
B. OUTPUT VOLTAGE, V
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
R
OUT
= 65mΩ (I
STARTUP WAVEFORM
STARTUP WAVEFORM
OUT
(20A LOAD)
(NO LOAD)
100µs/div
100µs/div
= 20A)
OUT
OUT
SHDN
SHDN
= 1.290V (NO LOAD)
= 1.290V (NO LOAD)
= 0 TO 5V
= 0 TO 5V
CC
MAX1887 toc19
MAX1887 toc21
), SHDN = V
A
5V/div
B
1.0V/div
C
10A/div
D
10A/div
A
5V/div
B
1.0V/div
C
10A/div
D
10A/div
CC
(MAX1897))
9