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LTC3717

Features: ` VOUT = 1/2 VIN (Supply Splitter)` Adjustable and Symmetrical Sink/Source Current Limit up to 20A` ±0.65% Output Voltage Accuracy` Up to 97% Efficiency` No Sense Resistor Required` Ultrafast Transient Response` True Current Mode Control` 2% to 90% Duty Cycle at 200kHz` tON(MIN) 100ns` S...

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SeekIC No. : 004402310 Detail

LTC3717: Features: ` VOUT = 1/2 VIN (Supply Splitter)` Adjustable and Symmetrical Sink/Source Current Limit up to 20A` ±0.65% Output Voltage Accuracy` Up to 97% Efficiency` No Sense Resistor Required` Ultraf...

LTC3717 Data Sheet

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Part Number:
LTC3717
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` VOUT = 1/2 VIN (Supply Splitter)
` Adjustable and Symmetrical Sink/Source Current Limit up to 20A
` ±0.65% Output Voltage Accuracy
` Up to 97% Efficiency
` No Sense Resistor Required
` Ultrafast Transient Response
` True Current Mode Control
` 2% to 90% Duty Cycle at 200kHz
` tON(MIN) 100ns
` Stable with Ceramic COUT
` Dual N-Channel MOSFET Synchronous Drive
` Power Good Output Voltage Monitor
` Wide VCC Range: 4V to 36V
` Adjustable Switching Frequency up to 1.5MHz
` Output Overvoltage Protection
` Optional Short-Circuit Shutdown Timer
`Available in a 16-Pin Narrow SSOP Package


Application

· Bus Termination: DDR and QDR Memory, SSTL, HSTL, ...
· Notebook Computers, Desktop Servers
·Tracking Power Supply


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VCC, ION) ...................36V to 0.3V
Boosted Topside Driver Supply Voltage
(BOOST) ...................................................... 42V to 0.3V
SW Voltage .................................................... 36V to 5V
EXTVCC, (BOOST SW), RUN/SS,
PGOOD Voltages........................................... 7V to 0.3V
VREF, VRNG Voltages .................(INTVCC + 0.3V) to 0.3V
ITH, VFB Voltages....................................... 2.7V to 0.3V
TG, BG, INTVCC, EXTVCC Peak Currents ....................... 2A
TG, BG, INTVCC, EXTVCC RMS Currents .................... 50mA
Operating Ambient Temperature
    Range (Note 4) ..................................... 40  to 85
Junction Temperature (Note 2) ............................... 125
Storage Temperature Range .................. 65  to 150
Lead Temperature (Soldering, 10 sec)..................... 300


Description

The LTC®3717 is a synchronous step-down switching regulator controller for double data rate (DDR) and Quad Data RateTM (QDRTM) memory termination. The controller uses a valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN.

Forced continuous operation of LTC3717 reduces noise and RF interference. Output voltage is internally set to half of VREF, which is user programmable.

Fault protection is provided by an output overvoltage comparator and optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is symmetrical and user programmable. Wide supply range allows operation from 4V to 36V at the VCC input.




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