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 LINEAR 4V 150MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：4V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.35V @ 150mA
- Current - Output：150mA
- Current - Quiescent (Iq)：250 µA
- Current - Supply (Max)：-
- PSRR：55dB (400Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-30°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
Download product information
Overview
The LK112M40TR is a fixed-output linear low-dropout (LDO) voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 4.0V with a maximum continuous output current of 150mA. The device features a maximum input voltage rating of 14V and maintains a typical dropout voltage of 0.35V at full load. Quiescent current consumption is specified at 250µA, while power supply rejection ratio (PSRR) reaches 55dB at 400Hz. Integrated protection mechanisms include thermal shutdown and overcurrent limiting. The component operates within an extended temperature range of -30°C to +125°C and is housed in a compact SOT-23-5 surface-mount package.
Feature Summary
- Fixed 4.0V output voltage with 150mA load capability
- Low quiescent current consumption for efficient power management
- Integrated thermal and overcurrent protection circuits
- Logic-controlled enable pin for system power management
Applications
- Battery-powered portable electronic devices requiring stable 4V rails
- Embedded systems utilizing microcontrollers or sensors operating at 4.0V
- Industrial control modules requiring reliable linear regulation in harsh environments
Procurement Notes
Verify the specific suffix 'M' indicates the 4.0V fixed output variant when sourcing. Confirm the 'TR' designation corresponds to tape-and-reel packaging requirements for automated assembly lines. Ensure compatibility with SOT-23-5 footprint designs during PCB layout finalization. Cross-reference datasheet revisions to confirm updated thermal characteristics if operating near maximum junction temperatures.
Selection Notes
Select this component when a precise 4.0V output is required without external resistor networks. Consider the 150mA current limit against peak load demands to prevent thermal throttling. Evaluate the 250µA quiescent current impact on total system battery life compared to switching alternatives. Verify that the 14V maximum input voltage exceeds the highest expected source voltage under all transient conditions.
Part Context
This part belongs to the LK112 family of low-noise LDO regulators from STMicroelectronics. The family shares common architectural features including PNP pass transistors and shutdown functionality. Variants are distinguished primarily by their fixed output voltage settings, ranging from lower voltages up to higher levels, while maintaining identical package dimensions and protection profiles.
Replacement Considerations
Direct substitutes within the same family include other LK112 variants with different fixed output voltages, such as LK112M33TR (3.3V) or LK112M50TR (5.0V), provided the system voltage requirement differs. Ensure any replacement maintains the SOT-23-5 package and 150mA current rating for mechanical and electrical compatibility.
