Product overview
Description
The LK112S is a low-dropout linear regulator with shutdown function. The internal switch can be controlled by TTL or CMOS logic levels. The device is ON when the control pin is pulled to a high logic level. An external capacitor can be connected to the noise bypass pin to reduce the output noise level to 30 μVrms. An internal PNP pass transistor is used to achieve a low-dropout voltage.
The LK112S has a very low quiescent current in ON mode while in OFF mode the Iqis reduced to 100 nA max. The internal thermal shutdown circuitry limits the junction temperature below 150 °C. The load current is internally monitored and in the presence of a short-circuit or overcurrent conditions at the output, the device shuts down.
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All features
- Output current up to 200 mA
- Low-dropout voltage (500 mV max. at IOUT = 200 mA)
- Very low quiescent current: 0.1 μA in OFF mode and max. 250 μA in ON mode at IOUT = 0 mA
- Low output noise: typ. 30 μV at IOUT = 60 mA and 10 Hz < f < 80 kHz
- Wide range of output voltages
- Internal current and thermal limit
- VOUT tolerance ± 2% (at 25 °C)
- Operative input voltage from: VOUT + 0.5 to 14 V (for VOUT > 2 V) or from 2.5 V to 14 V (for VOUT < 2 V)
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STMicroelectronics - LK112S
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| LK112SM18TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LK112SM33TR | Active | SOT23-5L | Industrial | Ecopack2 | |
| LK112SM50TR | Active | SOT23-5L | Industrial | 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 | Grade | 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$)*/Qty | Output Voltage (V) (nom) | Output Tolerance (typ) | Output Current (A) (nom) | Unit Price (US$) | Country of Origin | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | ||||||||||||||||||||
| LK112SM50TR | distributors No availability of distributors reported, please contact our sales office | Active | Industrial | EAR99 | NEC | Tape and Reel | SOT23-5L | -40 | 125 | 5 | 2 | 0.2 | CHINA | | 5 | 2 | 0.2 | 0.3652 | CHINA | ||
| LK112SM18TR | distributors No availability of distributors reported, please contact our sales office | Active | Industrial | EAR99 | NEC | Tape and Reel | SOT23-5L | -40 | 125 | 1.8 | 2 | 0.2 | CHINA | | 1.8 | 2 | 0.2 | 0.3487 | CHINA | ||
| LK112SM33TR | distributors No availability of distributors reported, please contact our sales office | Active | Industrial | EAR99 | NEC | Tape and Reel | SOT23-5L | -40 | 125 | 3.3 | 2 | 0.2 | CHINA | | 3.3 | 2 | 0.2 | 0.3652 | CHINA | ||
(*) 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