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LTC1929-PG

Features: · 2-Phase Single Output Controller· Reduces Required Input Capacitance and Power Supply Induced Noise·Current Mode Control Ensures Current Sharing·Phase-Lockable Fixed Frequency: 150kHz to 300kHz· True Remote Sensing Differential Amplifier· OPTI-LOOPTM Compensation Improves Transient Res...

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SeekIC No. : 004401958 Detail

LTC1929-PG: Features: · 2-Phase Single Output Controller· Reduces Required Input Capacitance and Power Supply Induced Noise·Current Mode Control Ensures Current Sharing·Phase-Lockable Fixed Frequency: 150kHz to...

LTC1929-PG Data Sheet

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Part Number:
LTC1929-PG
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:

· 2-Phase Single Output Controller
· Reduces Required Input Capacitance and Power Supply Induced Noise
·Current Mode Control Ensures Current Sharing
·Phase-Lockable Fixed Frequency: 150kHz to 300kHz
· True Remote Sensing Differential Amplifier
· OPTI-LOOPTM Compensation Improves Transient Response
· ±1% Output Voltage Accuracy
· Power Good Output Voltage Monitor (LTC1929-PG)
· Wide VIN Range: 4V to 36V Operation
· Very Low Dropout Operation: 99% Duty Cycle
· Adjustable Soft-Start Current Ramping
· Internal Current Foldback
· Short-Circuit Shutdown Timer with Defeat Option
· Overvoltage Soft-Latch Eliminates Nuisance Trips
· Available in 28-Lead SSOP Package


Application

· Desktop Computers
· Internet/Network 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, AMPMD 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 <1s(TGL1,2, BG1,2) ................. 3A
INTVCC RMS Output Current ................................... 50mA
Operating Ambient Temperature Range
   LTC1929C ..................................................... 0to 85
   LTC1929I ................................................ 40 to 85
Junction Temperature (Note 2) ............................... 125
Storage Temperature Range ................... 65 to 150
Lead Temperature (Soldering, 10 sec).................... 300


Description

The LTC®1929/LTC1929-PG are 2-phase, single output, synchronous step-down current mode switching regulator controllers that drive N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 2-phase controllers drive their two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamenta  frequency by two, improving transient response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified.

An internal differential amplifier of LTC1929/LTC1929-PG provides true remote sensing of the regulated supply's positive and negative output terminals as required by high current applications.

The RUN/SS pin provides soft-start and a defeatable, timed, latched short-circuit shutdown to shut down both channels. Internal foldback current limit provides protection for the external synchronous MOSFETs in the event of an output fault. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values.




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