Key facts
- Brand
- Linear Technology
- Model
- LTC1155
- Category
- Power Management
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Linear Technology AN53 Micropower High Side MOSFET Drivers Application Note
The document introduces the LTC1155, a dual micropower MOSFET driver designed to fully enhance logic-level N-channel switches by generating a 12V gate drive voltage from a standard 5V supply. This capability eliminates the need for external components and allows for highly efficient power management in portable electronic equipment such as notebooks and medical instruments.
The text compares logic-level and standard N-channel MOSFETs, detailing their voltage ratings and selection criteria. It provides specific application circuits for powering large capacitive loads to prevent supply glitches, creating bidirectional switches using back-to-back MOSFETs, and extending the driver's operation range up to 28V.
Linear Technology LTC1155 specifications
| Supply Current (Switch Enhanced) | typically 85 µA |
|---|---|
| Supply Current (Standby Mode) | 8 µA |
| Gate Drive Voltage Generated | 12V from a 5V rail |
Source: Linear Technology AN53 Micropower High Side MOSFET Drivers Application Note
All Linear Technology LTC1155 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the primary function of the LTC1155?
It generates 12V from a 5V rail to fully enhance logic-level N-channel switches with no external components required.
From: Linear Technology AN53 Micropower High Side MOSFET Drivers Application Note
How does the LTC1155 improve efficiency in portable devices?
It enables switch efficiencies in the 98% to 99%+ range by using low-drop N-channel MOSFET switches instead of P-channels.
From: Linear Technology AN53 Micropower High Side MOSFET Drivers Application Note
What supply voltage range does the LTC1155 support?
The LTC1155 operates from 4.5 V up to 18 V supply voltage.
From: Linear Technology LTC1155 Dual High Side Micropower MOSFET Driver Datasheet
What is the drain‑sense threshold voltage?
The internal drain‑sense threshold is between 80 mV and 120 mV.
From: Linear Technology LTC1155 Dual High Side Micropower MOSFET Driver Datasheet