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LTC3633A-3 Datasheet

LTC3633A-3 Datasheet

Dual Channel 3A, 20V Monolithic Synchronous Step-Down Regulator
Part No.: LTC3633A-3
Page: 28 Pages
Size: 452 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-11-03 14:16:54
DataSheet: Download

LTC3633A-3 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC3633AEUFD-3#PBF Tube 73 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AEUFD-3#TRPBF Reel 2500 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AEUFD-3#TRMPBF Reel 500 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AIUFD-3#PBF Tube 73 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AIUFD-3#TRPBF Reel 2500 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AIUFD-3#TRMPBF Reel 500 633A3 1 28 -40°C ~ 125°C 28-Lead (4mm × 5mm) Plastic QFN  
LTC3633AEFE-3#PBF Tube 50 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
LTC3633AEFE-3#TRPBF Reel 2000 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
LTC3633AEFE-3#TRMPBF Reel 500 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
LTC3633AIFE-3#PBF Tube 50 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
LTC3633AIFE-3#TRPBF Reel 2000 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
LTC3633AIFE-3#TRMPBF Reel 500 LTC3633AFE-3 1 28 -40°C ~ 125°C 28-Lead Plastic TSSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC3633A-3 Datasheet(PDF)

LTC3633A-3 Datasheet(Picture)

LTC3633A-3 Features

  • 3.6V to 20V Input Voltage Range
  • 3A Output Current per Channel
  • Up to 95% Efficiency
  • Low Duty Cycle Operation: 5% at 2.25MHz
  • Selectable 0°/180° Phase Shift Between Channels
  • Adjustable Switching Frequency: 500kHz to 4MHz
  • External Frequency Synchronization
  • Current Mode Operation for Excellent Line and Load Transient Response
  • 0.6V Reference Allows Low Output Voltages
  • User Selectable Burst Mode® Operation or Forced Continuous Operation
  • Output Voltage Tracking and Soft-Start Capability
  • Short-Circuit Protected
  • Overvoltage Input and Overtemperature Protection
  • Power Good Status Outputs
  • Available in (4mm × 5mm) QFN-28 and 28-Lead TSSOP Packages

LTC3633A-3 Applications

  • Distributed Power Systems
  • Battery Powered Instruments
  • Point of Load Power Supplies

LTC3633A-3 Description

The LTC3633A-3 is a high efficiency, dual-channel monolithic synchronous buck regulator using a controlled on-time, current mode architecture, with phase lockable switching frequency. The two channels can run 180° out of phase to relax the requirements for input and output capacitance. The operating supply voltage range is from 3.6V to 20V, making it suitable for lithium-ion battery stacks as well as point of load power supply applications from a 12V or 5V supply.

The operating frequency is programmable from 500kHz to 4MHz with an external resistor and may be synchronized to an external clock signal. The high frequency capability allows the use of small surface mount inductors and capacitors. The unique constant frequency/controlled on-time architecture is ideal for high step-down ratio applications that operate at high frequency while demanding fast transient response. An internal phase locked loop servos the on-time of the internal one-shot timer to match the frequency of the internal clock or an applied external clock.

The LTC3633A-3 can select between forced continuous mode and high efficiency Burst Mode operation. The LTC3633A-3 output voltage sense range 1.5V TO 12V.

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