VRM64 Series
Single output
Filename: vrm64.pdf Rev (02): 20 Dec 2005
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
DC-DC CONVERTERS 80 A Non-Isolated 3
NEW Product
SIGNAL ELECTRICAL INTERFACE
ELECTROMAGNETIC COMPATIBILITY
NNootteess
1Recommended output capacitance, 48 x 22 µF ceramic MLCC.
250 mV pk-pk ripple. Vin = 12 V, Vout = 1.5 V, Iout = 80 A.
3With the recommended capacitors (See Note 1) across the output, the
output voltage stays within the load regulation window for all loads and
transient events, up to 80 A. It will also allow instantaneous VID-on-the-
fly changes of up to 500 mV at 80 A.
4VRM64 uses a five phase buck topology. Each phase switches at
830 kHz. This gives an equivalent switching frequency of 4.2 MHz
5Maximum current requires adequate forced air over the converter. Please
consult Figure 1 for thermal derating.
6When the VRM detects an output over-voltage event, the OVP pin
transitions to logic high. This signal can be used to shut down the
supply to the VRM, or drive an external crowbar device.
7These are default settings. The current limit may be set to ‘trip’ or
‘hiccup’. The output overvoltage limits, input overvoltage and
undervoltage settings, the output droop and offset, the current limit
setpoint and many others can be changed by component changes.
Please consult the factory for details.
80.01 G2/Hz from 5 Hz to 20 Hz, maintaining 0.02 G2/Hz from 20 Hz to
500 Hz, all axes.
9In accordance with AMD requirements, PWRGD will go high at least 2 ms
after VDD settles within specifications.
10 The ‘Y’ suffix indicates that these parts are TSE RoHS 5/6 (non Pb-free)
compliant. Pb-free (RoHS 6/6) compliant versions may be available on
special request, please contact your local sales representative for details.
11 NOTICE: Some models do not support all options. Please contact your
local Artesyn representative or use the on-line model number search tool
at http://www.artesyn.com/powergroup/products.htm to find a suitable
alternative.
CHARACTERISTIC - SIGNAL NAME SYMBOL MIN TYP MAX UNITS NOTES AND CONDITIONS
ENABLE - on ENABLE (on) 1.7 5.5 V No pull up resistor provided
by the VRM
ENABLE - off ENABLE (off) -0.3 0.8 V No pull up resistor provided
by the VRM
PWRGD - high VPWRGD (high) 1.7 V No pull up resistor provided
by the VRM
PWRGD - low VPWRGD (low) -0.3 0.8 V Open-collector output to not more
than 5.5 V, max current 5 mA
PWRGD - low threshold 150 mV Below VID setting
PWRGD - turn-on response to Trise 2 2.5 10 ms For waveforms, refer to Application
ENABLE going high Note 185
VID - high Vih (VID) 1.7 5.5 V
VID - low Vil (VID) -0.3 0.8 V
OVP1 (See Note 7) 2.2 V Default setting is trip. At OVP1 or
OVP2 whichever is smaller
OVP2 (See Note 7) 133 % Of VID Setting
OVP drive voltage CB_OUT 4 V
SMBus Address high ADD_x (high) 3.8 V
SMBus Address low ADD_x (low) -0.3 0.7 V
SMBus Data high SMDA (high) 2.1 5.5 V
SMBus Data low SMDA_x (low) -0.3 0.8 V
CHARACTERISTIC - SIGNAL NAME SYMBOL MIN TYP MAX UNITS NOTES AND CONDITIONS
ESD - Indirect air 15 kV EN61000-4-2
In end user equipment
ESD - Indirect contact 8 kV EN61000-4-2
In end user equipment
Input characteristics:
Input current - operating IIN 12 A Vin = Vin (typ.),
Iout (cont.) = 80 A, VID = 1.5 V
Input capacitance - external bypass CINext 1600 µF