LM5067 Datasheet PDF - National Semiconductor
| Part Number | LM5067 | |
| Description | Negative Hot Swap / Inrush Current Controller | |
| Manufacturers | National Semiconductor | |
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LM5067
September 9, 2009
Negative Hot Swap / Inrush Current Controller with Power
Limiting
General Description
The LM5067 negative hot swap controller provides intelligent
control of the power supply connections during insertion and
removal of circuit cards from a live system backplane or other
“hot” power sources. The LM5067 provides in-rush current
control to limit system voltage droop and transients. The cur-
rent limit and power dissipation in the external series pass N-
Channel MOSFET are programmable, ensuring operation
within the Safe Operating Area (SOA). In addition, the
LM5067 provides circuit protection by monitoring for over-
current and over-voltage conditions. The POWER GOOD
output indicates when the output voltage is close to the input
voltage. The input under-voltage and over-voltage lockout
levels and hysteresis are programmable, as well as the fault
detection time. The LM5067-1 latches off after a fault detec-
tion, while the LM5067-2 automatically attempts restarts at a
fixed duty cycle. The LM5067 is available in a 10 pin MSOP
package and a 14 pin SOIC package.
Features
■ Wide operating range: -9V to -80V
■ In-rush current limit for safe board insertion into live power
sources
■ Programmable maximum power dissipation in the external
pass device
■ Adjustable current limit
■ Circuit breaker function for severe over-current events
■ Adjustable under-voltage lockout (UVLO) and hysteresis
■ Adjustable over-voltage lockout (OVLO) and hysteresis
■ Initial insertion timer allows ringing and transients to
subside after system connection
■ Programmable fault timer avoids nuisance trips
■ Active high open drain POWER GOOD output
■ Available in latched fault and automatic restart versions
Applications
■ Server Backplane Systems
■ In-Rush Current Limiting
■ Solid State Circuit Breaker
■ Transient Voltage Protector
■ Solid State Relay
■ Under-voltage Lock-out
■ Power Good Detector/Indicator
Package
■ MSOP-10
■ SO-14 (Latched Fault Version)
Typical Application
www.DataSheet4U.com
Negative Power Bus In-Rush and Fault Protection
30030901
© 2009 National Semiconductor Corporation 300309
www.national.com
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Symbol
Current Limit
VCL
tCL
Circuit Breaker
VCB
tCB
Parameter
Threshold voltage
Response time
Threshold voltage
Response time
Power Limit (PWR Pin)
PWRLIM
Power limit sense voltage (SENSE - VEE)
IPWR
Timer (TIMER Pin)
VTMRH
VTMRL
PWR pin current
Upper threshold
Lower threshold
ITIMER
Insertion time current
Sink current, end of insertion time
Fault detection current
Sink current, end of fault time
DCFAULT
Fault Restart Duty Cycle
tFAULT
Fault to GATE low delay
Power Good (PGD Pin)
PGDTH
Threshold measured at OUT - SENSE
PGDVOL
Output low voltage
PGDIOH
Off leakage current
Thermal Resistance (Note 6)
www.DatθaJSAheet4U.comJunction to Ambient
θJC Junction to Case
θJA Junction to Ambient
θJC Junction to Case
Conditions
Min Typ Max Units
SENSE - VEE voltage
44 50 56 mV
SENSE - VEE stepped from 0 mV
to 80 mV
25
µs
SENSE - VEE voltage
SENSE - VEE stepped from 0 mV
to 150 mV, time to GATE low, no
load
70
100 130
0.65 1.0
mV
µs
OUT - SENSE = 24V, RPWR = 75 16.5 22 27.5 mV
kΩ
VPWR = 2.5V
-23 µA
3.76 4 4.16
Restart cycles (LM5067-2)
1.18 1.25 1.32
End of 8th cycle (LM5067-2)
0.3
Re-enable threshold (LM5067-1)
0.3
TIMER pin = 2V
-9.5 -6 -2.5
TIMER pin = 2V
1.2 1.55 1.9
TIMER pin = 2V
-140 -85 -44
0.9 2.5 4.25
LM5067-2
0.5
TIMER pin reaches 4.0V
15
V
V
V
V
µA
mA
µA
µA
%
µs
Decreasing
1.162 1.23 1.285
Increasing, relative to decreasing 1.143 1.25 1.325
threshold
ISINK = 2 mA
VPGD = 80V
60 150
5
V
mV
µA
MSOP package
MSOP package
SO-14 Package
SO-14 Package
94 °C/W
44 °C/W
90 °C/W
27 °C/W
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and conditions see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Note 3: Current out of a pin is indicated as a negative value.
Note 4: For detailed information on soldering plastic MSOP package refer to the Packaging Databook available from National Semiconductor Corporation.
Note 5: Maximum continuous current into VCC is limited by power dissipation and die temperature. See the Thermal Considerations section.
Note 6: Tested on a 4 layer JEDEC board with 2 vias under the package. See JEDEC standards JESD51-7 and JESD51-3. See the Thermal Considerations
section.
Note 7: N/C Pins are internally not connected to anything.
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LM5067 electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LM5067.PDF Datasheet ] | |
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