LTC1929 Selling Leads, Price trend, LTC1929 DataSheet download, circuit diagram from SeekIC.com

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 R...

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SeekIC No. : 004401957 Detail

LTC1929: 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 ...

LTC1929 Data Sheet

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Part Number:: LTC1929
Supply Ability:: 5000

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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
· Wide V_IN 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 (V_IN)...........................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, V_OS⁺, V_OS, EXTV_CC, INTV_CC,
RUN/SS, AMPMD Voltages..............................7V to 0.3V
Boosted Driver Voltage (BOOST-SW) ............7V to 0.3V
PLLFLTR, PLLIN, V_DIFFOUT V_oltages ....... INTV_CC to 0.3V
I_TH Voltage ................................................2.7V to 0.3V
Peak Output Current <1s(TGL1,2, BG1,2) ................ 3A
INTV_CC RMS Output Current .................................. 50mA
Operating Ambient Temperature Range
LTC1929C .................................................. 0 to 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 is a 2-phase, single output, synchronous step-down current mode switching regulator controller that drives N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 2-phase controller drives its 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 fundamental 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 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 sychronous 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.

LTC1929

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