Rev.07.20.07

vrm series

4 of 7

Embedded Power for

Business-Critical Continuity

Specifications

SIGNAL ELECTRICAL INTERFACE

ELECTROMAGNETIC COMPATIBILITY

Notes

1

Recommended output capacitance, 48 x 22 μF ceramic MLCC.

2

50 mV pk-pk ripple. Vin = 12 V, Vout = 1.5 V, Iout = 80 A.

3

With 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.

4

VRM64 uses a five phase buck topology. Each phase switches at

830 kHz. This gives an equivalent switching frequency of 4.2 MHz

5

Maximum current requires adequate forced air over the converter. Please

consult Figure 1 for thermal derating.

6

When 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.

7

These 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.

8

Hz, all axes.

9

In 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

1.7

5.5

V

No pull up resistor provided

by the VRM

ENABLE - off

-0.3

0.8

V

No pull up resistor provided

by the VRM

PWRGD - high

1.7

V

No pull up resistor provided

by the VRM

PWRGD - 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

2

2.5

10

ms

For waveforms, refer to Application

ENABLE going high

Note 185

VID - high

1.7

5.5

V

VID - low

-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

4V

SMBus Address high

3.8

V

SMBus Address low

-0.3

0.7

V

SMBus Data high

2.1

5.5

V

SMBus Data 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

12

A

Input capacitance - external bypass

1600

μF