LTC1709-8

Features: Single Controller Operates Two Output Stages:Antiphase Reducing Required Input Capacitanceand Power Supply Induced Noise Two 5-Bit Desktop VID Codes:LTC1709-8 For VRM8.4 (VOUT from 1.3V to 3.5V)LTC1709-9 For VRM9.0 (VOUT from 1.1V to 1.85V) Current Mode Control Ensures Best Current Shar...

product image

LTC1709-8 Picture
SeekIC No. : 004401833 Detail

LTC1709-8: Features: Single Controller Operates Two Output Stages:Antiphase Reducing Required Input Capacitanceand Power Supply Induced Noise Two 5-Bit Desktop VID Codes:LTC1709-8 For VRM8.4 (VOUT from 1.3V t...

floor Price/Ceiling Price

Part Number:
LTC1709-8
Supply Ability:
5000

Price Break

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

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/3/28

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

Single Controller Operates Two Output Stages:Antiphase Reducing Required Input Capacitanceand Power Supply Induced Noise
Two 5-Bit Desktop VID Codes:LTC1709-8 For VRM8.4 (VOUT from 1.3V to 3.5V)LTC1709-9 For VRM9.0 (VOUT from 1.1V to 1.85V)
Current Mode Control Ensures Best Current Sharing
True Remote Sensing Differential Amplifier
Power Good Output Indicator
OPTI-LOOPTMCompensation Minimizes COUT
Programmable Fixed Frequency: 150kHz to 300kHz
±1% Output Voltage Accuracy
Wide VIN Range: 4V to 36V Operation
Adjustable Soft-Start Current Ramping
Internal Current Foldback and Short-Circuit Shutdown
Overvoltage Soft Latch Eliminates Nuisance Trips
Low Shutdown Current: 20µA
Available in 36-Lead SSOP Package



Application

Workstations
Internet Servers
Large Memory Arrays
DC Power Distribution Systems



Pinout

  Connection Diagram


Specifications

Input Supply Voltage (VIN) .........................36V to 0.3V
Topside Driver Voltages (BOOST1,2) .........42V to 0.3V
Switch Voltage (SW1, 2) ..............................36V to 5 V
SENSE1+, SENSE2+, SENSE1,
SENSE2 Voltages ..................... (1.1)INTVCC to 0.3V
EAIN, VOS+, VOS, EXTVCC, INTVCC, RUN/SS,
VBIAS, ATTENIN, ATTENOUT, PGOOD,
VID0VID4, Voltages ................................7V to 0.3V
Boosted Driver Voltage (BOOST-SW) .........7V to 0.3V
PLLFLTR, PLLIN, VDIFFOUT Voltages .. INTVCC to 0.3V
ITH Voltage .............................................2.7V to 0.3V
Peak Output Current <1µs(TGL1,2, BG1,2) .............. 3A
INTVCC RMS Output Current ...............................  50mA
Operating Ambient Temperature Range
  (Note 2) ............................................40°C to 85°C
Junction Temperature (Note 3) .......................... 125°C
Storage Temperature Range .............65°C to 150°C
Lead Temperature (Soldering, 10 sec) ............... 300°C



Description

The LTC®1709-8/LTC1709-9 are 2-phase, VID program-mable, synchronous step-down switching regulator con-trollers that drive two all N-channel external power MOSFETstages in a fixed frequency architecture. The 2-phasecontroller drives its two output stages out of phase atfrequencies up to 300kHz to minimize the RMS ripplecurrents in both input and output capacitors.  The 2-phasetechnique effectively multiplies the fundamental frequencyby two, improving transient response while operatingeach channel at an optimum frequency for efficiency.

Thermal design of LTC1709-8/LTC1709-9 is also simplified.An internal differential amplifier provides true remotesensing of the regulated supply's positive and negativeoutput terminals as required for high current applications.

The RUN/SS pin provides soft-start and optional timed,short-circuit shutdown. Current foldback limits MOSFETdissipation during short-circuit conditions when theovercurrent latchoff is disabled. OPTI-LOOP compensa-tion allows the transient response to be optimized for awide range of output capacitors and ESR values. TheLTC1709-8/LTC1709-9 implement two different VIDtables compliant with VRM8.4 and VRM9.0 respectively.




Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.