lm5066pmhx National Semiconductor Corporation, lm5066pmhx Datasheet - Page 3

• Manufacturer Part Number: lm5066pmhx
• Description: High Voltage System Power Management And Protection Ic With Pmbus
• Manufacturer: National Semiconductor Corporation

Pin
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RETRY
DIODE
TIMER
SDAO
SMBA
Name
VAUX
VREF
ADR2
ADR1
ADR0
SDAI
PWR
GND
PGD
VDD
SCL
N/C
CL
FB
SMBus data output pin
SMBUS address line 2
SMBUS address line 1
SMBUS address line 0
Power Good feedback
Auxiliary voltage input
Power Good indicator
SMBus data input pin
Internal sub-regulator
Internal Reference
Current limit range
Timing capacitor
SMBus alert line
Fault retry input
Power limit set
No Connection
External diode
Circuit ground
SMBus clock
Description
output
Applications Information
Data input pin for SMBus. Connect to SDAO if the application does not require
unidirectional isolation devices.
Data output pin for SMBus. Connect to SDAI if the application does not require
unidirectional isolation devices.
Clock pin for SMBus.
Alert pin for SMBus, active low.
Internally generated precision reference used for analog to digital conversion.
Connect a 1 µF capacitor on this pin to ground for bypassing.
Connect this to a diode-configured MMBT3904 NPN transistor for temperature
monitoring.
Auxiliary pin allows voltage telemetry from an external source. Full scale input
of 2.97V.
Tri- state address line. Should be connected to GND, VDD, or left floating.
Tri - state address line. Should be connected to GND, VDD, or left floating.
Tri - state address line. Should be connected to GND, VDD, or left floating.
Internally sub-regulated 4.85V bias supply. Connect a 1 µF capacitor on this
pin to ground for bypassing.
Connect this pin to GND or leave floating to set the nominal over-current
threshold at 50mV. Connecting CL to VDD will set the over-current threshold
to be 26mV.
An external resistor divider from the output sets the output voltage at which the
PGD pin switches. The threshold at the pin is nominally 2.46V. An internal 20
µA current source provides hysteresis.
This pin configures the power up fault retry behavior. When this pin is connected
to GND or left floating, the device will continually try to engage power during a
fault. If the pin is connected to VDD, the device will latch off during a fault.
An external capacitor connected to this pin sets the insertion time delay, fault
timeout period and restart timing.
An external resistor connected to this pin, in conjunction with the current sense
resistor (R
pass MOSFET.
An open drain output. This output is high when the voltage at the FB pin is above
V
over-voltage thresholds. Connect to the output rail (external MOSFET source)
or any other voltage to be monitored.
FBTH
(nominally 2.46V) and the input supply is within its under-voltage and
S
), sets the maximum power dissipation allowed in the external series
3
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