Hot Swap(TM) Controller includes on-chip, 8-bit ADC.
Share:
Press Release Summary:
Available in 24-lead SO, Narrow SSOP, and 32-lead 5 x 5 mm QFN packages, LTC4260 incorporates I2C/SMBus compatible interface and ADC that monitors current and voltage. Product monitors for under/overvoltage conditions and uses its feedback and power good comparators to determine output voltage status. It disconnects load if it remains in current limit beyond adjustable time-out delay and can be configured to latch off or auto-retry following event.
Original Press Release:
48V Hot Swap Controller Includes On-Chip ADC for Current & Voltage Monitoring
Milpitas, CA - October 13, 2004 - Linear Technology Corporation introduces the LTC4260, a positive high voltage Hot Swap(TM) controller that features an on-chip 8-bit ADC and I2C compatible interface. This allows for sophisticated power monitoring by measuring card voltages and currents as well as recording past and present fault conditions. Information in the ADC's registers can be queried via the I2C bus to determine if a card is actually using its allocated power or if it is operating abnormally. An irregular card can be flagged for service, perhaps even before it fails. The advanced power monitoring and hot swap capabilities, combined with a wide input voltage range of 8.5V up to 80V, make the LTC4260 ideally suited for high availability telecom/network equipment, where careful monitoring of the health and integrity of the power distribution network is crucial.
The Hot Swap controller is designed to turn the supply voltage on and off in a controlled manner. The active current limiting results in a controlled rise in the voltage across the card capacitance and protects the backplane supply from voltage drops. The LTC4260 disconnects the load if it remains in current limit beyond the adjustable time-out delay and can be configured to latch off or autoretry following the event. In addition, the LTC4260 monitors for under/overvoltage conditions and uses its feedback and power good comparators to determine the output voltage status.
Specified over the commercial and industrial temperature ranges, the LTC4260 is available from stock in 24-lead SO, Narrow SSOP and 32-lead 5mm x 5mm QFN packages. Pricing begins at $6.50 each in 1,000-piece quantities.
Summary of Features: LTC4260
Allows Safe Insertion into Live Backplane
8-Bit ADC Monitors Current and Voltage
I2C/SMBus Compatible Interface
Wide Operating Voltage Range: 8.5V to 80V
High Side Drive for External N-Channel MOSFET
Input Overvoltage/Undervoltage Protection
Optional Latchoff or Autoretry After Faults
Alerts Host After Faults
Foldback Current Limit
Available in 24-Lead SO, Narrow SSOP and 32-Lead QFN Packages
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.
Note: LT and LTC are registered trademarks and Hot Swap is a trademark of Linear Technology Corp.
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
China (PRC)
Fanny Lau
Tel: 852-2428-0303
flau@linear.com
Angela Ao
Tel: (8610)6522 8081
angela@eba.com.cn
Germany
Ralf Stegmann
Tel: +49 (0) 7131/9234-0
ralf@ezwire.com
Japan
Kazuto Takahashi
Tel: 81-3-5226-7291
takahashi@linear-tech.co.jp
UK & Scandinavia
Alan Timmins
Tel: +44-1-252-629937
a.timmins@ntlworld.com
Korea
Desiree Park
Tel: +82 (0) 2812 1144
desiree@ezwire.com