LTC1504A - 500mA Low Voltage Step-Down Synchronous Switching Regulator
Features
- 500mA Output Current at 3.3V Output
- Up to 92% Peak Efficiency
- Internal Reference Trimmed to 1%
- Output Can Source or Sink Current
- Requires as Few as Four External Components
- Input Voltage Range: 4V to 10V
- Adjustable Current Limit
- Small SO-8 Package
- 200kHz Switching Frequency Can be Synchronized Up to 500kHz
Typical Application
Description
The LTC1504A is a self-contained, high efficiency synchronous buck switching regulator. It includes a pair of on-chip 1.3ohms power switches, enabling it to supply up to 500mA of load current. Efficiency peaks at 92%, minimizing heat and wasted power. The synchronous buck architecture allows the output to source or sink current as required to keep the output voltage in regulation. 100% duty cycle operation minimizes dropout voltage.
The LTC1504A is available in adjustable and fixed 3.3V output versions. An adjustable current limit circuit provides protection from overloads. The internal 1% reference combined with a sophisticated voltage feedback loop provides optimum output voltage accuracy and fast load transient response. The LTC1504A is specified to operate with input voltages between 4V and 10V. Contact the LTC factory for guaranteed specifications at 2.7V supply.
The LTC1504A is a pin-compatible, functional upgrade to the LTC1504.
The LTC1504A is available in a plastic SO-8 package.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC1504ACS8-3.3#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1504ACS8-3.3#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1504ACS8#PBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1504ACS8#TRPBF | SO-8 | S8 | C | 05-08-1610 (S8) | Yes |
| LTC1504AIS8-3.3#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1504AIS8-3.3#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1504AIS8#PBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
| LTC1504AIS8#TRPBF | SO-8 | S8 | I | 05-08-1610 (S8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1504ACS8-3.3#PBF | SO-8 | C | $2.85 | $2.40 | Yes | |
| LTC1504ACS8-3.3#TRPBF | SO-8 | C | $2.46 | Yes | ||
| LTC1504ACS8#PBF | SO-8 | C | $2.85 | $2.40 | Yes | |
| LTC1504ACS8#TRPBF | SO-8 | C | $2.46 | Yes | ||
| LTC1504AIS8-3.3#PBF | SO-8 | I | $3.15 | $2.65 | Yes | |
| LTC1504AIS8-3.3#TRPBF | SO-8 | I | $2.71 | Yes | ||
| LTC1504AIS8#PBF | SO-8 | I | $3.15 | $2.65 | Yes | |
| LTC1504AIS8#TRPBF | SO-8 | I | $2.71 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Small Portable Digital Systems
- Active Termination
- Auxiliary Output Voltage Supplies
- Minimum Part Count/Size Switchers
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LTC1504
LTC1504-3.3
LTC1504A
LTC1504A-3.3
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
