Product overview
Description
The LDQ40 is a high accuracy voltage regulator, which provides 250 mA of current.
It is available in an SOT23 5L, DFN 2x2 6L package, to maximize space saving.
The device is stabilized with a small ceramic capacitor on the output. The low drop, low quiescent current, and short-circuit protection make the LDQ40 suitable for low-power battery-operated applications.
An enable logic control function puts the LDQ40 in shutdown mode allowing a total current consumption lower than 0.3 µA. Thermal protection is also included.
-
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 (500 mV typ. at 250 mA load)
- Low ground current (2 μA typ. at no load)
- Output voltage: 1.8 V, 2.5 V, 3.3 V, and 5.0 V and ADJ from 1.2 V to 12 V
- Output voltage tolerance: ±1.5% overtemperature, ±0.5% at 25 °C
- 250 mA guaranteed output current
- Power Good for fixed versions
- Logic-controlled electronic shutdown
- Internal current limit
- Short-circuit protection
- Thermal shutdown
- Output active discharge function
- Package options:
- SOT23-5L, DFN 2x2 6L for industrial applications
- DFN 2x2 6L WF for automotive grade
- AEC-Q100 grade 1 qualified
Recommended for you
EDA Symbols, Footprints and 3D Models
STMicroelectronics - LDQ40
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Please select one model supplier :
Symbols
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LDQ40PU18RY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack2 (**) | |
| LDQ40PU25RY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack2 (**) | |
| LDQ40PU33R | Active | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Industrial | Ecopack2 | |
| LDQ40PU33RY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack2 (**) | |
| LDQ40PU50R | Active | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Industrial | Ecopack2 | |
| LDQ40PU50RY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack2 (**) | |
| LDQ40PUR | Active | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Industrial | Ecopack2 | |
| LDQ40PURY | Active | DFN 6L 2X2X 0.75 PITCH0.65 AG | Automotive | Ecopack3 |
LDQ40PU33R
Package:
VFDFPN 6L 2 X 2 X 0,75 PITCH0.65Material Declaration**:
LDQ40PU50R
Package:
VFDFPN 6L 2 X 2 X 0,75 PITCH0.65Material Declaration**:
(**) 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) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||||||
| LDQ40PU50R | Active | 0.405 / 1k | 2 distributors | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Tape and Reel | TAIWAN | EAR99 | NEC | -40 | 125 | Industrial |
| 0.5 | 0.25 | ||||
| LDQ40PU18RY | Active | 0.4709 / 1k | 4 distributors | DFN 6L 2X2X 0.75 PITCH0.65 AG | Tape and Reel | THAILAND | EAR99 | NEC | -40 | 125 | Automotive |
| 0.5 | 0.25 | ||||
| LDQ40PU33R | Active | 0.405 / 1k | 4 distributors | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Tape and Reel | TAIWAN | EAR99 | NEC | -40 | 125 | Industrial |
| 0.5 | 0.25 | ||||
| LDQ40PUR | Active | 0.405 / 1k | 4 distributors | VFDFPN 6L 2 X 2 X 0,75 PITCH0.65 | Tape and Reel | THAILAND | EAR99 | NEC | -40 | 125 | Industrial |
| 0.5 | 0.25 | ||||
| LDQ40PURY | Active | 0.4709 / 1k | 4 distributors | DFN 6L 2X2X 0.75 PITCH0.65 AG | Tape and Reel | THAILAND | EAR99 | NEC | -40 | 125 | Automotive |
| 0.5 | 0.25 | ||||
| LDQ40PU25RY | Active | 0.4709 / 1k | 3 distributors | DFN 6L 2X2X 0.75 PITCH0.65 AG | Tape and Reel | THAILAND | EAR99 | NEC | -40 | 125 | Automotive |
| 0.5 | 0.25 | ||||
| LDQ40PU33RY | Active | 0.4709 / 1k | 5 distributors | DFN 6L 2X2X 0.75 PITCH0.65 AG | Tape and Reel | TAIWAN | EAR99 | NEC | -40 | 125 | Automotive |
| 0.5 | 0.25 | ||||
| LDQ40PU50RY | Active | 0.4709 / 1k | 4 distributors | DFN 6L 2X2X 0.75 PITCH0.65 AG | Tape and Reel | THAILAND | EAR99 | NEC | -40 | 125 | Automotive |
| 0.5 | 0.25 | ||||
LDQ40PU50R Active
LDQ40PU18RY Active
LDQ40PU33R Active
LDQ40PUR Active
LDQ40PURY Active
LDQ40PU25RY Active
LDQ40PU33RY Active
LDQ40PU50RY 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