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Product Detailed Parameters
- Description：200 MA LOW DROPOUT LDO
- Series：*
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：-
- Output Type：-
- Number of Regulators：-
- Voltage - Input (Max)：-
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：-
- Current - Quiescent (Iq)：-
- Current - Supply (Max)：-
- PSRR：-
- Control Features：-
- Protection Features：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The LDH40PUR is a low dropout linear regulator manufactured by STMicroelectronics, designed for automotive and industrial applications. It features an input voltage range from 3.3 V to 40 V, supporting load dump transients typical in automotive systems. The device provides a guaranteed output current of 200 mA with high accuracy. It operates within a junction temperature range of -40 °C to +150 °C and includes thermal protection and internal current limit functions.
Feature Summary
- Ultra-low quiescent current at light load extends battery operation lifetime in always-on-standby systems.
- Extended input voltage up to 40 V supports load dump transients common in automotive environments.
- Logic-controlled electronic shutdown function reduces total current consumption below 0.3 µA.
Applications
- Automotive applications requiring direct connection to car batteries
- Industrial applications connected to generic batteries
- Always-on-standby systems prioritizing battery life
Procurement Notes
Verify the specific package variant, as the LDH40 series offers DFN 2x2 6L WF for automotive grade and other options like SOT23 5L or DFN 6L for industrial use. Confirm that the PUR suffix corresponds to the required packaging and qualification level for your design. Ensure compatibility with the intended operating temperature range and load conditions before finalizing procurement.
Selection Notes
Select this component when a stable regulated voltage is needed close to the input voltage with minimal external components. It is suitable for designs requiring high PSRR and low noise. Consider the 200 mA output capability and the ability to handle high input voltages up to 40 V. Verify if the adjustable output voltage range from 1.2 V to 22 V meets the system requirements.
Part Context
The LDH40 belongs to STMicroelectronics' LDO linear regulator family, which includes LDL40 and LDQ40 variants. These regulators are designed for cost-effective power management with simple designs. They offer benefits such as ultralow quiescent current and small package options, making them ideal for portable healthcare devices and battery-powered consumer electronics.
Replacement Considerations
LDL40 and LDQ40 are part of the same flexible power management solution family. LDL40 provides up to 200 mA output current, while LDQ40 offers up to 250 mA. Check if the specific output current requirement or additional features like short-circuit protection (available in LDQ40) necessitate a different variant within the series.
