ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 55

• Manufacturer Part Number: ltc2978
• Description: Octal Pmbus Power Supply Monitor And Controller With Eeprom
• Manufacturer: Linear Technology Corporation

applicaTions inForMaTion
Trimming and Margining DC/DC Converters with
External Feedback Resistors
Figure 16 shows a typical application circuit for trim-
ming/margining a power supply with an external feedback
network. The V
sense the load voltage directly, and a correction voltage
SENSEP0
Figure 16. Application Circuit for DC/DC Converters with External Feedback Resistors
VFAULTBzn
V
4.5V < V
CONTROLn
BUSSED
and V
V
V
V
V
PINS
OUT0
OUT1
OUT2
OUTn
IBUS
SENSEM0
< 15V
V
0.1µF
0.1µF
IN
Figure 15. Aborted On Sequence Due to Channel 1 Short
TON_DELAY0
differential inputs
V
V
V
V
PWR
DD33
DD33
DD25
TON_DELAY1
TON_DELAY2
TON_DELAYn
LTC2978*
•
•
•
GND
V
V
V
SENSEM0
OUT_EN0
V
SENSEP0
V
V
IN_SNS
DACM0
DACP0
TON_MAX_FAULT1
*SOME DETAILS OMITTED FOR CLARITY
ONLY ONE OF EIGHT CHANNELS SHOWN
is developed between the V
closed-loop servo algorithm. V
to the point-of-load GND in order to minimize the effects
of load induced grounding errors. The V
connected to the DC/DC converter’s feedback node through
resistor R30.
LOAD
R20
R10
•
•
•
R30
V
V
V
SGND
RUN/SS
IN
OUT
CONVERTER
FB
DC/DC
GND
DACP0
2978 F16
2978 F15
DACM0
and V
is Kelvin connected
DACM0
LTC2978
DACP0
pins by the
output is

2978fa