URAM2M11 Vicor Corporation, URAM2M11 Datasheet - Page 5

• Manufacturer Part Number: URAM2M11
• Manufacturer: Vicor Corporation

-25
-50
-75
-0
10Hz
Vicor Corp. Tel: [phone] Fax: [phone]
µRAM2xxx
Figure 3a, 3b—Curves demonstrating the small signal attenuation performance as measured on a network analyzer with a typical
module at (a) 28V and 10A output and (b) 5V and 10A. The low frequency attenuation can be enhanced by connecting a 100µF
capacitor, C
Figure 4a-4b—Simulated graphs demonstrating the tradeoff of attenuation versus headroom setting at 20 Amps and an equivalent
100°C baseplate temperature at 3V and 28V.
Figure 4c-4d—MicroRam attenuation vs. power dissipation at 3V 20A, and 28V 20A.
Notes:The measurements in Figures 8-16 were taken with a µRAM2C21 and standard scope probes with a 20MHz bandwidth scope setting. The criteria for transient current
capability was as follows: The transient load current step was incremented from 10A to the peak value indicated, then stepped back to 10A until the resulting output peak to
peak was around 40mV.
-20.00
-40.00
-60.00
-80.00
20.00
0.00
10
-10
-20
-30
-40
-50
-60
-70
3.0
Vout=3V Iload=20A
100 degrees baseplate temperature
100Hz
Rhr=28k
HR
...
27k
DB(V(VOUT))
, to the V
100
3.5
26k
25k
Ripple Attenuation @ 28V (Room Temp.)
1.0KHz
1,000
REF
24k
4.0
10A, 100uF Vref
pin as shown in Figures 1 and 2.
23k
Frequency
Set your site on VICOR at www.vicorpower.com
Freq. (Hz)
22k
4.5
10,000
Watts
10KHz
21k
10A, No Vref Cap
5.0
21k (180mV)
100,000
20k (197mV)
20k
19k (217mV)
18k (240mV)
Rhr=28k (Vheadroom=90mV)
17k (260mV)
27k (100mV)
5.5
26k (110mV)
100KHz
19k
1,000,000
100khz 3V
500khz 3V
1Mhz 3V
25k (122mV)
24k (135mV)
23k (150mV)
6.0
22k (160mV)
18k
PRELIMINARY
10,000,000
17k
1.0MHz
-25
-50
-75
-0
10Hz
-20.00
-40.00
-60.00
-80.00
20.00
0.00
10
MicroRAM
-10
-20
-30
-40
-50
-60
-70
Vout=28V Iload=20A
100 degrees baseplate temperature
3.0
100Hz
Rhr=260k
...
DB(V(VOUT))
250k
100
3.5
240k
Ripple Attenuation @ 5V (Room Temp.)
230k
220k
1.0KHz
1,000
4.0
10A, 100uF Vref
210k
200k
Frequency
Freq. (Hz)
10,000
4.5
28V 20A
190k
Watts
10KHz
10A, No Vref Cap
5.0
180k
Rev. 1.1
100,000
190k (180mV)
180k (197mV)
Rhr=260k (Vheadroom=90mV)
170k (217mV)
170k
5.5
160k (240mV)
250k (100mV)
100KHz
150k (260mV)
1,000,000
240k (110mV)
100khz 28V
500khz 28V
1Mhz 28V
230k (122mV)
220k (135mV)
160k
210k (150mV)
6.0
200k (160mV)
Page 5 of 8
10,000,000
150k
1.0MHz