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The LD49100 provides 1 A maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. The device is stable with ceramic capacitors on the input and output.
The ultra low-dropout voltage, low quiescent current and low-noise features make it suitable for a wide range of automotive applications. Power supply rejection is 70 dB at low frequency and starts to roll off at 10 kHz. Enable logic control function puts the LD49100 in shutdown mode, allowing a total current consumption lower than 1 μA.
The device features a precise Power Good indicator, useful to monitor and sequence functions. Internal 1 ms soft-start circuit allows the reduction of inrush current.
The device includes the short-circuit constant current limiting and thermal protection. The LD49100 is available in AEC-Q100 grade 1 qualified version, in a small 6-pin DFN6 (3x3 mm) with wettable flank package.Key Features
- AEC-Q100 qualified
- Temperature range: -40 °C to 125 °C
- Input voltage from 1.5 to 5.5Â V
- Ultra low-dropout voltage (200Â mV typ. at 1Â A load)
- Very low quiescent current (20 µA typ. at no load, 200 µA typ. at 1 A load, 1 µA max. in off mode)
- Very low-noise with no bypass capacitor (30 µVRMS at VOUT = 0.8 V)
- Output voltage tolerance: ± 2.0% at 25 °C
- 1 A guaranteed output current
- Wide range of output voltages available on request: 0.8Â V to 4.5Â V with 100Â mV step and adjustable from 0.8 V
- Logic-controlled electronic shutdown
- Power Good function
- Stable with ceramic capacitors COUT = 1 µF
- Internal current and thermal limit
- DFN6 (3x3Â mm) package with wettable flanks
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All resources
Product Specifications (1)
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| 11 Sep 2020 |
11 Sep 2020
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Selection Guides (1)
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| 25 Mar 2020 |
25 Mar 2020
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Brochures (2)
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| 15 Feb 2019 |
15 Feb 2019
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| 26 Feb 2020 |
26 Feb 2020
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EDA Symbols, Footprints and 3D Models
STMicroelectronics - LD49100
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.
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3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LD49100PU12RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
|
| LD49100PU18RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 | |
| LD49100PU25RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
|
| LD49100PU33RY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
|
| LD49100PURY |
Active
|
DFN6 3x3 | Automotive | Ecopack2 |
|
(**) 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 | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Country of Origin | Budgetary Price (US$)*/Qty | More info | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||||
| LD49100PU33RY | 3 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -40 | 125 | 3.3 | 2 | 1 | THAILAND | 0.8 / 1k | ||
| LD49100PU12RY | 3 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -40 | 125 | 1.2 | 2 | 1 | THAILAND | 0.8 / 1k | ||
| LD49100PU25RY | 3 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -40 | 125 | 2.5 | 2 | 1 | THAILAND | 0.8 / 1k | ||
| LD49100PU18RY | 2 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -40 | 125 | 1.8 | 2 | 1 | THAILAND | 0.8 / 1k | ||
| LD49100PURY | 3 distributors | Free Sample Buy Direct |
Active
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -40 | 125 | - | 2 | 1 | THAILAND | 0.8 / 1k | ||
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
