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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 8SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3.5V ~ 14V
- Frequency - Switching：-
- Duty Cycle (Max)：100%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SO
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Overview
The LTC1147IS8-5#TRPBF is a high-efficiency step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 3.5 V to 16 V and provides a fixed 5 V output with a maximum current capacity of 700 mA. The device features a 400 kHz switching frequency and draws only 160 uA of static current. It is housed in an 8-SOIC package and supports operation temperatures from -40°C to +85°C.
Feature Summary
- Features automatic Burst Mode operation to maintain high efficiency at low output currents
- Includes shutdown capability for power management
- Supports current-mode control architecture
Applications
- Battery-powered systems requiring extended runtime
- Portable electronic devices
- Industrial control systems
Procurement Notes
Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm the IS8 variant meets the required industrial temperature range of -40°C to +85°C compared to commercial alternatives. Ensure compatibility with external MOSFETs selected for the buck topology application.
Selection Notes
Select this component for designs prioritizing efficiency during light-load conditions due to its Burst Mode functionality. Compare against other Buck controllers if higher switching frequencies or different output voltages are required. Verify that the 700 mA output current aligns with the load requirements of the target circuit design.
Part Context
This part belongs to the LTC1147 series of switching regulator controllers. It is distinct from linear regulators like the LT1121 and voltage references like the LTC6655. The series focuses on DC-DC conversion using a buck topology, offering a balance between performance and power consumption for portable applications.
Replacement Considerations
LTC1147IS8-5#PBF (Tube Packaging)
FAQ
Does the LTC1147IS8-5#TRPBF include an internal switch?
No, it is a controller IC that requires external MOSFETs to implement the buck converter topology.
What is the purpose of Burst Mode operation in this device?
Burst Mode allows the controller to skip switching cycles during light loads, significantly improving efficiency and reducing quiescent current consumption.
