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Product Detailed Parameters
- Description：IC REG LINEAR 1V 3A PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：4 mA
- Current - Supply (Max)：6 mA
- PSRR：68dB (120Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-25°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
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Overview
The LD49300PT10R is a high-bandwidth, low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed 1 V output with a maximum continuous current of 3 A. The device utilizes a dual-supply architecture featuring a main input (VIN) ranging from 1.4 V to 5.5 V and a bias supply (VBIAS) between 3 V and 6 V. This configuration ensures an ultra-low output impedance and fast transient response up to 10 MHz bandwidth. The unit operates within a junction temperature range of -25 °C to +125 °C and includes logic-controlled shutdown, thermal shutdown, and current limit protection.
Feature Summary
- Dual-supply configuration enabling very low dropout voltage and fast transient response
- Logic-controlled shutdown option for power management
- Integrated thermal shutdown and current limit protection
- Stable operation with ceramic capacitors
Applications
- Graphics processors
- PC add-in cards
- Microprocessor core voltage supply
- Low voltage digital ICs
- High efficiency linear power supplies
Procurement Notes
Verify the specific part number against official manufacturer documentation to confirm the fixed 1 V output variant. Ensure that the design accommodates the required dual-supply inputs, specifically the 3 V to 6 V bias rail. Confirm compliance with environmental standards such as RoHS through the datasheet. Check for any recent lifecycle status updates directly from the manufacturer.
Selection Notes
Select this component when a high-current 3 A LDO with extremely fast transient response is required. The dual-supply requirement must be evaluated against available system rails. Verify that the application can provide the necessary bias voltage above the output level. Consider the PPAK package thermal characteristics for heat dissipation requirements in the target enclosure.
Part Context
This device belongs to the LD49300 family of very low-dropout regulators designed for high-performance computing applications. It shares architectural similarities with other high-current LDOs but distinguishes itself through its specific dual-rail control loop and high bandwidth capabilities tailored for dynamic load changes typical in processor cores.
Replacement Considerations
LD49300PT08R
FAQ
What is the minimum bias voltage required for the LD49300PT10R?
The bias supply (VBIAS) requires a minimum voltage of 3 V to operate properly.
Does the LD49300PT10R require a minimum load current?
No, the LD49300 does not require a minimum load current to maintain output voltage regulation.
