ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG BUCK 5V 700MA 16QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：3.6V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：700mA
- Frequency - Switching：500kHz ~ 2MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-WFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
Download product information
Overview
The LT3689EUD-5#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.4 V to 38 V and delivers a fixed output voltage of 5 V at up to 700 mA. The device features a 2 MHz switching frequency and a typical quiescent current of 50 µA. It integrates a power-on reset generator and a watchdog timer for system protection. The component is housed in a 16-lead QFN package and supports operation temperatures from -40°C to +125°C.
Feature Summary
- Integrates a power-on reset generator and a watchdog timer for enhanced system reliability.
- Utilizes a high-efficiency synchronous buck topology with internal power switches.
- Supports wide input voltage ranges suitable for various industrial supply rails.
Applications
- Industrial control systems requiring robust power management
- Embedded systems needing integrated fault protection mechanisms
- Portable equipment powered by single-cell lithium batteries
Procurement Notes
Verify the specific suffix EUD-5 against official Analog Devices documentation to confirm the fixed 5V output and QFN-16 package configuration. Ensure compatibility with required thermal dissipation standards for the target application environment. Cross-reference the manufacturer part number directly with authorized distributors to avoid counterfeit components.
Selection Notes
Select this component when a fixed 5V output is required alongside integrated safety features like watchdog timers. It is suitable for designs prioritizing board space efficiency due to the compact QFN package. Consider the 2 MHz switching frequency for minimizing external passive component sizes while maintaining acceptable ripple levels.
Part Context
This part belongs to the LT3689 family of monolithic buck regulators designed for high-efficiency applications. The series is characterized by its ability to operate from wide input voltages while maintaining low quiescent current. The integration of reset and watchdog functions distinguishes it from standard buck converters, offering a complete power solution for critical microcontroller systems.
Replacement Considerations
LT3689IUD#PBF: Adjustable output variant in the same QFN-16 package.
FAQ
What is the function of the integrated watchdog timer?
The watchdog timer monitors the processor activity and can trigger a reset if the system fails to toggle the watchdog pin within a specified time, ensuring system recovery from software hangs.
Does the LT3689EUD-5#PBF require an external catch diode?
No, the device uses a synchronous buck topology with an internal N-channel MOSFET acting as the catch switch, eliminating the need for an external Schottky diode.
