MAX1897EGP Просмотр технического описания (PDF) - Maxim Integrated
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MAX1897EGP Datasheet PDF : 33 Pages
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Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V+ = 12V, VCC = VDD = 5V, VOUT = 1.3V (ZMODE = GND) and 1V (ZMODE = VCC), SHDN = VCC (MAX1897))
DYNAMIC OUTPUT VOLTAGE TRANSITION
MAX1887 toc18
5.0V
A
0
5V/div
1.3V
B
200mV/div
1.1V
C
0
10A/div
0
D
10A/div
40µs/div
A. ZMODE = 0 TO 5V
B. OUTPUT VOLTAGE, VOUT = 1.30V (ZMODE = GND)
OR 1.10V (ZMODE = VCC)
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
SHUTDOWN WAVEFORM
MAX1887 toc20
5V
A
5V/div
0
1V
B
1.0V/div
0
0
C
10A/div
0
D
10A/div
100µs/div
A. MASTER SHUTDOWN, VSHDN = 5V TO 0
B. OUTPUT VOLTAGE, VOUT = 1.290V (NO LOAD)
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
STARTUP WAVEFORM
(NO LOAD)
MAX1887 toc19
A
5V
5V/div
0
B
1V
1.0V/div
0
0
C
10A/div
D
0
10A/div
100µs/div
A. MASTER SHUTDOWN, VSHDN = 0 TO 5V
B. OUTPUT VOLTAGE, VOUT = 1.290V (NO LOAD)
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
STARTUP WAVEFORM
(20A LOAD)
MAX1887 toc21
5V
A
5V/div
0
B
0
1.0V/div
C
10A/div
0
D
10A/div
0
100µs/div
A. MASTER SHUTDOWN, VSHDN = 0 TO 5V
B. OUTPUT VOLTAGE, VOUT = 1.290V (NO LOAD)
C. SLAVE INDUCTOR CURRENT
D. MASTER INDUCTOR CURRENT
ROUT = 65mΩ (IOUT = 20A)
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