Product overview
Description
LDH40 is a high accuracy voltage regulator designed to be directly connected to a car battery in automotive applications, or a generic battery connected in industrial applications. Extended input voltage up to 40 V makes the device capable to support a load dump transient, typical in automotive systems. Ultra-low quiescent current at light load increases the battery operation lifetime in always-on-standby systems.
The device is stabilized with a small ceramic capacitor on the input and output.
An enable logic control function puts the LDH40 in shutdown mode allowing a total current consumption lower than 0.3 µA. Thermal protection is also included.
The device is available in automotive grade in a very small footprint DFN package with wettable flank, allowing the maximum space saving in the PCB (printed circuit board) design and AOI (automated optical inspection).
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All features
- AEC-Q100 grade 1 qualified
- Operating temperature range: -40 °C < TJ < +150 °C
- Input voltage from 3.3 V to 40 V
- Dropout voltage (700 mV typ. at 200 mA load)
- Low ground current (2 μA typ. at no load)
- ADJ from 1.2 V to 22 V
- Output voltage tolerance: 0.5% at 25 °C
- 200 mA guaranteed output current
- Power Good
- Logic-controlled electronic shutdown
- Internal current limit
- Thermal shutdown
- Output active discharge function
- Package options:
- DFN 2x2 6L WF for automotive grade
- SOT23 5L and DFN 6L for industrial
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - LDH40
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LDH40MR | Active | SOT23-5L | Industrial | Ecopack3 | |
| LDH40PURY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack3 | |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Grade | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | ||
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| LDH40MR | | | distributors No availability of distributors reported, please contact our sales office |
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| LDH40PURY | | | distributors No availability of distributors reported, please contact our sales office |
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LDH40MR Active
LDH40PURY Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors