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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 10MSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3.25V ~ 20V
- Frequency - Switching：1MHz
- Duty Cycle (Max)：45%
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：10-MSOP
- Grade：-
- Qualification：-
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Overview
The ADP1870ARMZ-1.0-R7 is a synchronous buck controller from Analog Devices, designed for high-efficiency power conversion. It features a constant on-time and valley current mode architecture. The input voltage range spans from 2.95 V to 20 V, supporting various power stages with N-channel MOSFETs. Key electrical parameters include a minimum output voltage of 0.6 V with ±1.0% accuracy, three selectable switching frequencies of 300 kHz, 600 kHz, and 1.0 MHz, and an operating temperature range of -40°C to +125°C. It utilizes a 10-lead MSOP package.
Feature Summary
- Integrates constant on-time control with valley current mode for stable operation without external current sense resistors.
- Includes an on-chip bias regulator and integrated bootstrap diode to simplify high-side driver requirements.
- Supports programmable current sense gain and offers protection against thermal overload and short circuits.
Applications
- Point-of-load regulation in industrial equipment
- Power management for embedded computing systems
- Battery-powered portable devices requiring efficient DC-DC conversion
Procurement Notes
Verify component authenticity through authorized channels due to limited supply status. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any updates to electrical characteristics or recommended operating conditions before finalizing design integration.
Selection Notes
Select this controller when designing synchronous buck converters requiring resistor-less current sensing and wide input voltage ranges. Consider the available switching frequency options and the need for light load efficiency modes. Ensure compatibility with N-channel MOSFETs and verify thermal performance within the specified operating temperature range.
Part Context
This part belongs to the ADP1870/ADP1871 family of synchronous buck controllers. It shares architectural similarities with other members but differs in specific feature sets such as light load efficiency enablement. The ADP1870 focuses on standard constant on-time operation, while variants may offer additional power saving modes.
Replacement Considerations
Public confirmed substitute part numbers are not provided in the source documentation. Verify functional equivalence regarding input voltage range, switching frequency, and package dimensions if considering alternative components.
