Key facts
- Brand
- Linear Technology
- Model
- LT1121
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-12
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LINEAR TECHNOLOGY LT1121/LT1121-3.3/LT1121-5 handbook
The LT1121 series are micropower low‑dropout (LDO) regulators with shutdown capability, offering up to 150 mA output current and a typical dropout voltage as low as 0.42 V at full load. Features include 30 pA quiescent current, reverse‑battery protection, and the ability to operate with very small output capacitors.
The devices are available in 8‑lead SO, 8‑lead PDIP, 3‑lead SOT‑23, 3‑lead TO‑92, and 3‑lead plastic packages. Typical performance curves, pin functions, and package dimensions are detailed, along with related parts for higher current or different voltage options.
Linear Technology LT1121 specifications
| Maximum Output Current | 150 mA |
|---|---|
| Adjustable Output Voltage Range | 3.75 V to 30 V |
| Fixed Output Voltages | 3.3 V, 5 V |
| Shutdown Pin Input Voltage Range | up to 7 V |
Source: LINEAR TECHNOLOGY LT1121/LT1121-3.3/LT1121-5 handbook
All Linear Technology LT1121 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
Can the LT1121 handle a reverse input voltage?
Yes, the device is designed to withstand reverse input voltages and prevents reverse current flow.
What fixed output voltage options are available for the LT1121?
The LT1121 is offered with fixed 3.3 V and 5 V output versions.
What is the typical dropout voltage of the LT1121?
The LT1121 typically has a dropout voltage of 0.4 V.
From: Linear Technology LT1121/LT1121-3.3/LT1121-5 Low Dropout Regulator Datasheet
How much quiescent current does the device draw in shutdown?
In shutdown the quiescent current drops to about 16 µA.
From: Linear Technology LT1121/LT1121-3.3/LT1121-5 Low Dropout Regulator Datasheet