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Product Detailed Parameters
- Description：IC REG BUCK BOOST ADJ 5A DDPAK-5
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive or Negative
- Topology：Buck, Boost, Cuk, Flyback, Forward Converter
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：3V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.244V
- Voltage - Output (Max)：65V (Switch)
- Current - Output：5A (Switch)
- Frequency - Switching：100kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 100°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Supplier Device Package：DDPAK-5
- Grade：-
- Qualification：-
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Overview
The LT1170IQ#PBF is a monolithic high-power switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3 V to 60 V and delivers up to 5 A output current. The device supports multiple topologies including Buck, Boost, Cuk, Flyback, Forward, and Inverting configurations. Key electrical parameters include a fixed switching frequency of 100 kHz, adjustable output voltage starting from 1.244 V, and a quiescent current of 6 mA. It is housed in a DDPAK-5 (TO-263-6) surface-mount package and functions within a temperature range of -40°C to +100°C.
Feature Summary
- Supports versatile DC-DC conversion topologies including buck, boost, flyback, forward, inverting, and Cuk circuits.
- Integrates a high-current, high-efficiency power switch with complete oscillator, control, and protection circuitry on a single die.
- Provides adjustable output voltage capability for flexible power supply design requirements.
Applications
- High efficiency 5V buck converter
- LCD contrast power supply generating negative voltages
- Negative boost regulator applications
- Positive-to-negative buck-boost converter designs
Procurement Notes
Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm the specific suffix matches the required package and temperature grade. Review the latest datasheet for any engineering change notices (ECNs) that may affect pinout or electrical characteristics before finalizing procurement specifications.
Selection Notes
Select this component when designing systems requiring high output current up to 5A across various standard switching topologies. Ensure the input voltage does not exceed the maximum rating of 60V. Consider thermal management solutions due to the power dissipation inherent in high-current switching operations within the DDPAK-5 package.
Part Context
This part belongs to the LT1170 series of high-power switching regulators. It is distinct from the LT1171, which offers a lower 2.5A current capacity but shares similar topology support. The LT1170 series is designed for applications demanding robust power conversion with integrated protection features.
Replacement Considerations
LT1171IQ#PBF provides similar topology support but with a reduced 2.5A output current rating. Verify if the lower current capacity meets system requirements before substitution.
