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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 1.5A TO263-5L
- Series：-
- Mfr：TAEJIN
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：26V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.6V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：20 mA
- Current - Supply (Max)：22 mA
- PSRR：-
- Control Features：Enable, Error Flag
- Protection Features：Load Dump, Over Current, Over Temperature, Reverse Polarity
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Supplier Device Package：TO-263-5L
- Grade：-
- Qualification：-
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Overview
The LM29151R-3.3 is a fixed-output low-dropout voltage regulator providing 3.3V at up to 1.5A. It features a 350mV dropout voltage at full load and 1% initial output tolerance. The device includes logic-level enable control and an error flag output for out-of-regulation detection. Operating input voltage ranges from 2.3V to 26V, with junction temperatures supported from -40°C to +125°C.
Feature Summary
- Features logic-level enable control for ON/OFF switching with zero-current shutdown mode.
- Includes an error flag signal that activates when the output voltage falls out of regulation.
- Provides reverse-battery and load dump protection alongside overcurrent and thermal shutdown safeguards.
Applications
- Battery powered equipment
- Automotive electronics
- High-efficiency linear power supplies
Procurement Notes
Verify the specific package variant (TO-263) and output voltage suffix (3.3) against the manufacturer's ordering information. Confirm that the required pin configuration matches the five-pin layout associated with the LM29151 series, which includes the enable and error flag terminals distinct from the three-pin variants.
Selection Notes
Select this component for applications requiring high current capability with minimal voltage drop across the regulator. The integrated error flag facilitates system monitoring for fault conditions. Ensure the input voltage remains within the specified operating range to maintain stable regulation and utilize the enable pin for power management strategies.
Part Context
This part belongs to the LM2915x family of high-current, high-accuracy low-dropout regulators manufactured by HTC Korea Taejin Technology Co. The family utilizes a PNP pass element process to achieve superior dropout performance compared to older NPN designs. The LM29151 specifically adds control and diagnostic features not present in the basic LM29150 model.
Replacement Considerations
LM29151T-3.3
FAQ
What is the function of the Error Flag on the LM29151?
The Error Flag is an open-collector output that signals an error condition by pulling low when the output voltage drops approximately 5% below its nominal value, indicating issues such as over-current or low input voltage.
How does the Enable pin operate on this regulator?
The Enable pin allows ON/OFF control with TTL/CMOS compatible thresholds. When disabled, it enters a zero-current shutdown mode, drawing only microamperes of leakage current.
