LTC1174
PRODUCTIONHigh Efficiency Step-Down and Inverting DC/DC Converter
- Part Models
- 23
- 1ku List Price
- Starting From $6.55
Overview
- High Efficiency: Up to 94%
- Peak Inductor Current Independent of Inductor Value
- Short-Circuit Protection
- Optimized for 5V to –5V Applications
- Wide VIN Range: 4V to 18.5V
- Low Dropout Operation
- Low-Battery Detector
- Pin Selectable Current Limit
- Internal 0.9Ω Power Switch: VIN = 9V
- Only Four External Components Required
- 130µA Standby Current
- Active Low Micropower Shutdown
The LTC1174 is a simple current mode DC/DC converter ideally suited for 9V to 5V, 5V to 3.3V or 5V to –5V operation. With an internal 0.9Ω switch (at a supply voltage of 9V), the LTC1174 requires only four external components to construct a complete high efficiency DC/DC converter.
Under a no load condition the LTC1174 draws only 130μA. In shutdown, it draws a mere 1μA making this converter ideal for current sensitive applications. In dropout, the internal P-channel MOSFET switch is turned on continuously allowing the user to maximize the life of the battery source.
The maximum inductor current of the LTC1174 family is pin selectable to either 340mA or 600mA, optimizing efficiency for a wide range of applications. Operation up to 200kHz permits the use of small surface mount inductors and capacitors.
For applications requiring higher output current or ultrahigh efficiency, see the LTC1148 data sheet.
Applications
- Distributed Power Systems
- Step-Down Converters
- Inverting Converters
- Memory Backup Supply
- Portable Instruments
- Battery-Powered Equipment
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
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| LTC1174CN8#PBF | PRODUCTION | |
| LTC1174CN8-3.3#PBF | PRODUCTION | |
| LTC1174CN8-5#PBF | PRODUCTION | |
| LTC1174HVCN8#PBF | PRODUCTION | |
| LTC1174HVCN8-3.3#PBF | PRODUCTION | |
| LTC1174HVCN8-5#PBF | PRODUCTION | |
| LTC1174IN8#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LTC1174CN8#PBF | PRODUCTION | |
| LTC1174CN8-3.3#PBF | PRODUCTION | |
| LTC1174CN8-5#PBF | PRODUCTION | |
| LTC1174HVCN8#PBF | PRODUCTION | |
| LTC1174HVCN8-3.3#PBF | PRODUCTION | |
| LTC1174HVCN8-5#PBF | PRODUCTION | |
| LTC1174IN8#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
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| LTC1174CN8#PBF | PRODUCTION | |
| LTC1174CN8-3.3#PBF | PRODUCTION | |
| LTC1174CN8-5#PBF | PRODUCTION | |
| LTC1174HVCN8#PBF | PRODUCTION | |
| LTC1174HVCN8-3.3#PBF | PRODUCTION | |
| LTC1174HVCN8-5#PBF | PRODUCTION | |
| LTC1174IN8#PBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1174CS8#PBF | PRODUCTION | |
| LTC1174CS8#TRPBF | PRODUCTION | |
| LTC1174CS8-3.3#PBF | PRODUCTION | |
| LTC1174CS8-3.3#TRPBF | PRODUCTION | |
| LTC1174CS8-5#PBF | PRODUCTION | |
| LTC1174CS8-5#TRPBF | PRODUCTION | |
| LTC1174HVCS8#PBF | PRODUCTION | |
| LTC1174HVCS8#TRPBF | PRODUCTION | |
| LTC1174HVCS8-3.3#PBF | PRODUCTION | |
| LTC1174HVCS8-3.3#TRPBF | PRODUCTION | |
| LTC1174HVCS8-5#PBF | PRODUCTION | |
| LTC1174HVCS8-5#TRPBF | PRODUCTION | |
| LTC1174HVIS8#PBF | PRODUCTION | |
| LTC1174HVIS8#TRPBF | PRODUCTION | |
| LTC1174IS8#PBF | PRODUCTION | |
| LTC1174IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1174CS8#PBF | PRODUCTION | |
| LTC1174CS8#TRPBF | PRODUCTION | |
| LTC1174CS8-3.3#PBF | PRODUCTION | |
| LTC1174CS8-3.3#TRPBF | PRODUCTION | |
| LTC1174CS8-5#PBF | PRODUCTION | |
| LTC1174CS8-5#TRPBF | PRODUCTION | |
| LTC1174HVCS8#PBF | PRODUCTION | |
| LTC1174HVCS8#TRPBF | PRODUCTION | |
| LTC1174HVCS8-3.3#PBF | PRODUCTION | |
| LTC1174HVCS8-3.3#TRPBF | PRODUCTION | |
| LTC1174HVCS8-5#PBF | PRODUCTION | |
| LTC1174HVCS8-5#TRPBF | PRODUCTION | |
| LTC1174HVIS8#PBF | PRODUCTION | |
| LTC1174HVIS8#TRPBF | PRODUCTION | |
| LTC1174IS8#PBF | PRODUCTION | |
| LTC1174IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1174CS8#PBF | PRODUCTION | |
| LTC1174CS8#TRPBF | PRODUCTION | |
| LTC1174CS8-3.3#PBF | PRODUCTION | |
| LTC1174CS8-3.3#TRPBF | PRODUCTION | |
| LTC1174CS8-5#PBF | PRODUCTION | |
| LTC1174CS8-5#TRPBF | PRODUCTION | |
| LTC1174HVCS8#PBF | PRODUCTION | |
| LTC1174HVCS8#TRPBF | PRODUCTION | |
| LTC1174HVCS8-3.3#PBF | PRODUCTION | |
| LTC1174HVCS8-3.3#TRPBF | PRODUCTION | |
| LTC1174HVCS8-5#PBF | PRODUCTION | |
| LTC1174HVCS8-5#TRPBF | PRODUCTION | |
| LTC1174HVIS8#PBF | PRODUCTION | |
| LTC1174HVIS8#TRPBF | PRODUCTION | |
| LTC1174IS8#PBF | PRODUCTION | |
| LTC1174IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1174
- LTC1174-3.3
- LTC1174-5
- LTC1174HV
- LTC1174HV-3.3
- LTC1174HV-5
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
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