MAX8771 Просмотр технического описания (PDF) - Maxim Integrated
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MAX8771 Datasheet PDF : 47 Pages
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CONFIDENTIAL INFORMATION – RESTRICTED TO INTEL® IMVP-6 LICENSEES
MAX8770/MAX8771/MAX8772 Dual-Phase, Quick-
PWM Controller for IMVP-6+ CPU Core Power Supplies
Typical Operating Characteristics (continued)
(Circuit of Figure 1. VIN = 12V, VCC = VDD, SHDN = PSI = 5V, DPRSLPVR = GND, D0–D6 set for 1.1500V, TA = 25°C, unless other-
wise specified.)
SHUTDOWN WAVEFORMS
MAX8770 toc16
A
0
B
0
C
0
0
D
1V
E
0
F
0
G
RLOAD = 65mΩ
200µs/div
A. SHDN, 5V/div
B. CLKEN, 10V/div
C. DL1, 10V/div
D. PWRGD, 10V/div
E. VOUT, 1V/div
F. ILXI, 10A/div
G. ILX2, 10V/div
HFM LOAD TRANSIENT
(VOUT(HFM) = 1.2875V
MAX8770 toc17
LFM LOAD TRANSIENT
(VOUT(LFM) = 0.9500V
MAX8770 toc18
A
0
1.28V
B
1.22V
20A
C
0
0
D
40µs/div
A. IOUT = 5A TO 36A, 10A/div
B. VOUT, 50mV/div
C. ILXI, 10A/div
D. ILX2,10A/div
0
A
0.94V
B
0.92V
10A
0
PSI = 0
40µs/div
A. IOUT = 5A TO 15A, 10A/div
B. VOUT, 50mV/div
C
C. ILXI, 10A/div
D. ILX2,10A/div
0
0
1.28V
ENTERING DEEPER SLEEP
EXITING TO LFM
MAX8770 toc19
A
B
C
0
0
1.28V
ENTERING DEEPER SLEEP
EXITING TO NEAREST VID
MAX8770 toc20
A
0
B
0
1.28V
C
ENTERING DEEPER SLEEP
EXITING TO LFM
MAX8770 toc21
A
B
C
0
D
0
E
100µs/div
A. DPRSTP, 5V/div
B. DPRSLPVR, 5V/div
C. VOUT, 500mV/div
IOUT = 2A
D. ILXI, 10A/div
E. ILX2, 10A/div
0
D
0
E
100µs/div
A. DPRSTP, 5V/div
B. DPRSLPVR, 5V/div
C. VOUT, 500mV/div
IOUT = 2A
D. ILXI, 10A/div
E. ILX2, 10A/div
0
D
0
E
100µs/div
A. DPRSTP, 5V/div
B. DPRSLPVR, 5V/div
C. VOUT, 500mV/div
IOUT = 2A
D. ILXI, 10A/div
E. ILX2, 10A/div
12 ______________________________________________________________________________________
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