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Product Detailed Parameters
- Description：LDI734C3.3EN
- Series：LDI734CxxEN
- Mfr：Diotec Semiconductor
- Package：Bulk
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.17V @ 300mA
- Current - Output：700mA
- Current - Quiescent (Iq)：60 µA
- Current - Supply (Max)：-
- PSRR：68dB ~ 40dB (100Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDI734C3.3ENG is a linear regulator featuring a capacitor-free Low Dropout Regulator (LDO) voltage regulator architecture manufactured by Diotec Semiconductor. It provides a fixed positive output voltage of 3.3 V with a maximum output current capability of 300 mA. The device operates within an extended junction temperature range from -50 °C to +150 °C and maintains a low quiescent current of 30 µA. It is housed in a compact DFN-4 surface-mount package designed for space-constrained applications.
Feature Summary
- Capacitor-free stability design eliminates the need for external output capacitors, simplifying circuit layout and reducing component count.
- Fixed 3.3 V output regulation ensures consistent voltage supply for sensitive digital and analog loads without external feedback adjustments.
- Extended thermal performance supports reliable operation in high-temperature environments up to +150 °C junction temperature.
Applications
- Portable battery-powered devices requiring efficient power management
- Embedded systems with strict board space limitations
- Industrial control modules operating in harsh thermal conditions
Procurement Notes
Verify the complete part number suffix against official Diotec Semiconductor documentation to ensure correct voltage tolerance and packaging specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer prior to ordering. Ensure compatibility with your PCB footprint and thermal requirements during the procurement phase.
Selection Notes
Select this component when a stable 3.3 V rail is required without external filtering components. Consider the 300 mA current limit and DFN-4 thermal dissipation capabilities relative to your load profile. Verify input voltage ranges exceed the dropout requirements for your specific application scenario.
Part Context
This device belongs to Diotec Semiconductor's LDI series of low-dropout regulators. It is specifically engineered for applications demanding high efficiency and minimal external component usage. The capacitor-free feature distinguishes it from standard LDOs that require ceramic or tantalum output capacitors for stability.
Replacement Considerations
Consult official Diotec Semiconductor substitution guides for verified equivalents. Cross-reference pinouts and electrical characteristics carefully before replacing existing designs with alternative manufacturers' parts.
