LM5069MM-2/NOPB National Semiconductor, LM5069MM-2/NOPB Datasheet - Page 19
![IC CTRLR HOT SWAP 48V 10-MSOP](/photos/6/60/66087/pkg_mub10a_sml.jpg)
LM5069MM-2/NOPB
Manufacturer Part Number
LM5069MM-2/NOPB
Description
IC CTRLR HOT SWAP 48V 10-MSOP
Manufacturer
National Semiconductor
Type
Hot-Swap Controllerr
Datasheet
1.LM5069MMX-1NOPB.pdf
(22 pages)
Specifications of LM5069MM-2/NOPB
Applications
General Purpose
Internal Switch(s)
No
Voltage - Supply
9 V ~ 80 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
For Use With
LM5069EVAL - BOARD EVALUATION LM5069
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM5069MM-2
LM5069MM-2TR
LM5069MM-2TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM5069MM-2/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
•
System Considerations
A) Continued proper operation of the LM5069 hot swap circuit
requires capacitance be present on the supply side of the
connector into which the hot swap circuit is plugged in, as
depicted in Figure 2. The capacitor in the “Live Backplane”
section is necessary to absorb the transient generated when-
ever the hot swap circuit shuts off the load current. If the
capacitance is not present, inductance in the supply lines will
generate a voltage transient at shut-off which can exceed the
The board’s edge connector can be designed to shut off
the LM5069 as the board is removed, before the supply
voltage is disconnected from the LM5069. In Figure 17 the
voltage at the UVLO pin goes to ground before V
FIGURE 18. Output Diode Required for Inductive Loads
FIGURE 17. Recommended Board Connector Design
SYS
is
19
absolute maximum rating of the LM5069, resulting in its de-
struction.
B) If the load powered via the LM5069 hot swap circuit has
inductive characteristics, a diode is required across the
LM5069’s output. The diode provides a recirculating path for
the load’s current when the LM5069 shuts off that current.
Adding the diode prevents possible damage to the LM5069
as the OUT pin will be taken below ground by the inductive
load at shutoff. See Figure 18.
removed from the LM5069 due to the shorter edge
connector pin. When the board is inserted into the edge
connector, the system voltage is applied to the LM5069’s
VIN pin before the UVLO voltage is taken high.
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