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Product Detailed Parameters
- Description：IC REG BCK BST 2.5V 450MA 10TDFN
- Series：-
- Mfr：ams-OSRAM USA INC.
- Package：Tape & Reel (TR)
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck-Boost
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：1.8V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：2.5V
- Voltage - Output (Max)：-
- Current - Output：450mA (Switch)
- Frequency - Switching：-
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：10-WFDFN Exposed Pad
- Supplier Device Package：10-TDFN (3x3)
- Grade：-
- Qualification：-
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Overview
The AS1331-BTDT-25 is a synchronous buck-boost switching regulator manufactured by ams OSRAM. It provides a fixed output voltage of 2.5 V with a maximum output current of 300 mA. The device operates at a switching frequency of 500 kHz and supports both boost and buck topologies within a single integrated circuit. It is housed in a TDFN-10 surface-mount package and functions reliably across an operating temperature range from -40°C to +85°C.
Feature Summary
- Integrates synchronous buck and boost converter capabilities for flexible input-output voltage relationships.
- Utilizes a compact TDFN-10 surface-mount package for efficient board space utilization.
- Designed for stable operation across standard industrial temperature ranges.
Applications
- Portable electronic devices requiring flexible power supply architectures
- Battery-powered systems with varying input voltage levels
- Embedded applications needing regulated low-voltage power rails
Procurement Notes
Verify component authenticity through authorized distribution channels due to the discontinued status of this part number. Confirm that the TDFN-10 package dimensions align with existing PCB footprints. Ensure thermal management strategies accommodate the specified operating temperature range during final assembly validation.
Selection Notes
Select this component when a single IC solution is required to handle both step-up and step-down conversion scenarios. The fixed 2.5 V output suits specific logic or sensor interfaces. Evaluate the 300 mA current limit against peak load requirements to ensure adequate headroom for system stability.
Part Context
This regulator belongs to the AS1331 series, which focuses on compact power management solutions. The BTDT suffix indicates the specific TDFN-10 packaging variant. As a discontinued item, it represents earlier generations of ams OSRAM's PMIC portfolio designed for cost-sensitive consumer electronics.
Replacement Considerations
No public confirmed substitute part numbers are available for this discontinued component. Designers should evaluate newer PMIC families from the manufacturer or alternative suppliers offering similar synchronous buck-boost functionality with compatible pinouts.
FAQ
What is the primary advantage of the buck-boost topology in this device?
It allows the regulator to maintain a stable 2.5 V output even when the input voltage is either higher or lower than the output voltage, accommodating battery discharge cycles effectively.
Does the AS1331-BTDT-25 support adjustable output voltages?
No, this specific model variant provides a fixed output voltage of 2.5 V as indicated by the '25' suffix in the part number.
