LM5067MW-1/NOPB National Semiconductor, LM5067MW-1/NOPB Datasheet - Page 19
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LM5067MW-1/NOPB
Manufacturer Part Number
LM5067MW-1/NOPB
Description
IC CTLR NEG HOTSWAP LATCH 14SOIC
Manufacturer
National Semiconductor
Type
Hot-Swap Controllerr
Datasheet
1.LM5067MM-1NOPB.pdf
(24 pages)
Specifications of LM5067MW-1/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
14-SOIC (0.300", 7.50mm Width)
Linear Misc Type
Negative Voltage
Family Name
LM5067-1
Operating Supply Voltage (min)
-9V
Operating Supply Voltage (max)
-80V
Operating Temperature (min)
-40C
Operating Temperature (max)
125C
Operating Temperature Classification
Automotive
Product Height (mm)
2.35mm
Mounting
Surface Mount
Pin Count
14
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM5067MW-1
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM5067MW-1/NOPB
Manufacturer:
TI/NS
Quantity:
2 600
As an example, assume the application requires the following
thresholds: V
V
resistor values are:
R1 = 227 kΩ, R2 = 39.1 kΩ
R3 = 90.9 kΩ, R4 = 3.95 kΩ
Where the R1-R4 resistor values are known, the threshold
voltages and hysteresis are calculated from the following:
Note: Ensure the voltages at the UVLO and OVLO pins do
not exceed the Absolute Maximum ratings for those pins
when the system voltage is at maximum.
Option C: The minimum UVLO level is obtained by connect-
ing the UVLO pin to VCC as shown in Figure 13. Q1 is
switched on when the operating voltage reaches the POR
threshold (
R4 using the procedure in Option B.
Note: Ensure the voltage at the OVLO pin does not ex-
ceed the Absolute Maximum ratings for that pin when the
system voltage is at maximum.
OVL
= -58V. Therefore V
≊
8.4V). The OVLO thresholds are set by R3 and
UVH
= -22V, V
UV(HYS)
UVL
= 5V, and V
= -17V, V
OVH
OV(HYS)
= -60V, and
= 2V. The
EN
19
Option D: The OVLO function can be disabled by connecting
the OVLO pin to VEE. The UVLO thresholds are set as de-
scribed in Option B or Option C.
SHUTDOWN / ENABLE CONTROL
Figure 14a shows how to use the UVLO/EN pin for remote
shutdown and enable control. Taking the UVLO/EN pin below
its 2.5V threshold (with respect to VEE) shuts off the load
current. Upon releasing the UVLO/EN pin the LM5067 switch-
es on the load current with in-rush current and power limiting.
In Figure 14b the OVLO pin is used for remote shutdown and
enable control. When the external transistor is off, the OVLO
pin is above its 2.5V threshold (with respect to VEE) and the
load current is shut off. Turning on the external transistor al-
lows the LM5067 to switch on the load current with in-rush
current and power limiting.
a) Shutdown/Enable Using the UVLO/EN Pin
b) Shutdown/Enable Using the OVLO Pin
FIGURE 14. Shutdown/Enable
FIGURE 13. UVLO = POR
EN
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