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LTC1624

Features: N-Channel MOSFET DriveImplements Boost, Step-Down, SEPIC and Inverting RegulatorsWide VIN Range: 3.5V to 36V OperationWide VOUT Range: 1.19V to 30V in Step-Down Configuration±1% 1.19V ReferenceLow Dropout Operation: 95% Duty Cycle200kHz Fixed FrequencyLow Standby CurrentVery High Efficie...

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SeekIC No. : 004401740 Detail

LTC1624: Features: N-Channel MOSFET DriveImplements Boost, Step-Down, SEPIC and Inverting RegulatorsWide VIN Range: 3.5V to 36V OperationWide VOUT Range: 1.19V to 30V in Step-Down Configuration±1% 1.19V Refe...

LTC1624 Data Sheet

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Part Number:
LTC1624
Supply Ability:
5000

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

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Product Details

Description



Features:

N-Channel MOSFET Drive
Implements Boost, Step-Down, SEPIC and Inverting Regulators
Wide VIN  Range: 3.5V to 36V Operation
Wide VOUT Range: 1.19V to 30V in Step-Down Configuration
±1% 1.19V Reference
Low Dropout Operation: 95% Duty Cycle
200kHz Fixed Frequency
Low Standby Current
Very High Efficiency
Remote Output Voltage Sense
Logic-Controlled Micropower Shutdown
Internal Diode for Bootstrapped Gate Drive
Current Mode Operation for Excellent Line and Load Transient Response
Available in an 8-Lead SO Package


Application

Notebook and Palmtop Computers, PDAs
Cellular Telephones and Wireless Modems
Battery-Operated Digital Devices
DC Power Distribution Systems
Battery Chargers


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN)........................36V to -0.3V
Topside Driver Supply Voltage (BOOST)....42V to -0.3V
Switch Voltage (SW).................................36V to -0.6V
Differential Boost Voltage
    (BOOST to SW)....................................7.8V to -0.3V
SENSE - Voltage
    VIN < 15V.................................(VIN + 0.3V) to -0.3V
    VIN15V............................(VIN  +0.3V) to (VIN -15V)
ITH/RUN, VFB Voltages............................ 2.7V to -0.3V
Peak Driver Output Current < 10s (TG)..................2A
Operating Temperature Range
       LTC1624CS..........................................0 to 70
       LTC1624IS........................................-40 to 85
Junction Temperature (Note 1)...........................125
Storage Temperature Range.................-60 to 150
Lead Temperature (Soldering, 10 sec)................300


Description

      The LTC® 1624 is a current mode switching regulator controller that  drives an external N-channel power MOSFET using a fixed frequency architecture. It can be operated inall standard switching configurations including boost, step-down, inverting and SEPIC. Burst ModeTM operation provides high efficiency at low load currents. A maximum high duty cycle limit of 95% provides low dropout operation which extends operating time in battery-operated systems.

      The operating frequency of LTC1624 is internally set to 200kHz, allowing small inductor values and minimizing PC board space. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 36V (absolute maximum).

     A multifunction pin (ITH /RUN) allows external compensation for optimum load step response plus shutdown. Soft start  can also be implemented with the ITH /RUN pin  to properly sequence supplies.




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