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Product Detailed Parameters
- Description：IC REG BOOST ADJ 370MA 16QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Up
- Output Configuration：Positive
- Topology：Boost
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.7V
- Voltage - Input (Max)：20V
- Voltage - Output (Min/Fixed)：2.7V
- Voltage - Output (Max)：75V (Switch)
- Current - Output：370mA (Switch)
- Frequency - Switching：250kHz ~ 2MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-WFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
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Overview
The LT3571IUD#PBF is a high-performance current mode step-up DC/DC converter manufactured by Analog Devices Inc. Designed specifically for biasing avalanche photodiodes (APDs) in optical receivers, this device delivers an adjustable output voltage up to 75V. It integrates a 370mA internal switch and a Schottky diode within a compact QFN-16 package. The converter operates with a wide input voltage range and supports frequency synchronization for system noise management.
Feature Summary
- Integrated high-side fixed voltage drop APD current monitor for precise bias control
- Frequency synchronization capability to minimize system-wide electromagnetic interference
- Built-in protection mechanisms including open LED protection and thermal shutdown
Applications
- Biasing avalanche photodiodes in optical receiver modules
- High-voltage power supply generation for photodetection circuits
- Industrial optical communication systems requiring stable APD bias
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence when sourcing. Confirm the QFN-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the datasheet revision date to ensure compatibility with your design constraints.
Selection Notes
Select this component when a compact solution for high-voltage APD biasing is required. The integrated switch and diode reduce external component count compared to discrete solutions. Consider the 370mA switch current limit for load requirements. Evaluate the frequency synchronization feature if multiple converters operate in close proximity to prevent audible noise or interference.
Part Context
This part belongs to the LT3571 family of DC/DC converters from Analog Devices. It is distinct from the LT3517 series, which focuses on LED lighting drivers with different topologies and current capabilities. The LT3571 is specialized for high-voltage step-up applications rather than general-purpose buck or buck-boost conversions found in other product lines.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility and electrical parameter equivalence with alternative manufacturers before substitution.
