LM5069 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting

LM5069
www.ti.com
SNVS452D – SEPTEMBER 2006 – REVISED MAY 2013
LM5069 Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting
Check for Samples: LM5069
FEATURES
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•2 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
• Internal High Side Charge Pump and Gate
Driver for External N-channel MOSFET
• 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
• Base Station Power Distribution Systems
• Solid State Circuit Breaker
• 24V/48V Industrial Systems
PACKAGE
• VSSOP-10
DESCRIPTION
The LM5069 positive 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 LM5069 provides in-rush current control to limit
system voltage droop and transients. The current limit
and power dissipation in the external series pass N-
Channel MOSFET are programmable, ensuring
operation within the Safe Operating Area (SOA). The
POWER GOOD output indicates when the output
voltage is within 1.25V of the input voltage. The input
under-voltage and over-voltage lockout levels and
hysteresis are programmable, as well as the initial
insertion delay time and fault detection time. The
LM5069-1 latches off after a fault detection, while the
LM5069-2 automatically restarts at a fixed duty cycle.
The LM5069 is available in a 10 pin VSSOP package.
TYPICAL APPLICATION
V_SYS
V_OUT
VIN
UVLO
SENSE GATE
LM5069
OVLO
TIMER GND
OUT
PGD
PWR
Power
Good
Figure 1. Positive Power Supply Control
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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