LT1076-5 - 5V Step-Down Switching Regulator
Features
- Fixed 5V Output
- 2A On-Board Switch
- 100kHz Switching Frequency
- 2% Output Voltage Tolerance Over Temperature
- Greatly Improved Dynamic Behavior
- Available in Low Cost 5- and 7-Lead Packages
- Only 9.5mA Quiescent Current
- Operates Up to 60V Input
Typical Application
Description
The LT1076-5 is a 2A fixed 5V output monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, all current limit components, and an output monitor are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1076-5 to drive a tapped inductor in the buck mode with output currents up to 4A.
The LT1076-5 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.
On-chip pulse by pulse current limiting makes the LT1076-5 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.
The LT1076-5 is available in a low cost 5- and 7-lead TO-220 packages with frequency pre-set at 100kHz and current limit at 2.6A. See Application Note 44 for design details.
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 |
|---|---|---|---|---|---|
| LT1076CQ-5#PBF | DDPAK-5 | Q | C | 05-08-1461 | Yes |
| LT1076CQ-5#TRPBF | DDPAK-5 | Q | C | 05-08-1461 | Yes |
| LT1076CR-5#PBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1076CR-5#TRPBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1076CT-5#06PBF | TO-220 | T | C | 05-08-1421 (Flow 06) | Yes |
| LT1076CT-5#PBF | TO-220 | T | C | 05-08-1421 (Standard) | Yes |
| LT1076CT7-5#PBF | TO-220 | T7 | C | 05-08-1422 (Standard) | Yes |
| LT1076HVCT-5#PBF | TO-220 | T | C | 05-08-1421 (Standard) | Yes |
| LT1076HVCT7-5#PBF | TO-220 | T7 | C | 05-08-1422 (Standard) | Yes |
| LT1076HVIT-5#PBF | TO-220 | T | I | 05-08-1421 (Standard) | Yes |
| LT1076IT-5#PBF | TO-220 | T | I | 05-08-1421 (Standard) | 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 | |
|---|---|---|---|---|---|---|
| LT1076CQ-5#PBF | DDPAK-5 | C | $5.00 | $3.95 | Yes | |
| LT1076CQ-5#TRPBF | DDPAK-5 | C | $4.07 | Yes | ||
| LT1076CR-5#PBF | DDPAK-7 | C | $5.42 | $4.30 | Yes | |
| LT1076CR-5#TRPBF | DDPAK-7 | C | $4.42 | Yes | ||
| LT1076CT-5#06PBF | TO-220 | C | $4.33 | $3.40 | Yes | |
| LT1076CT-5#PBF | TO-220 | C | $4.33 | $3.40 | Yes | |
| LT1076CT7-5#PBF | TO-220 | C | $5.00 | $3.95 | Yes | |
| LT1076HVCT-5#PBF | TO-220 | C | $7.58 | $6.00 | Yes | |
| LT1076HVCT7-5#PBF | TO-220 | C | $8.75 | $6.90 | Yes | |
| LT1076HVIT-5#PBF | TO-220 | I | $9.55 | $7.35 | Yes | |
| LT1076IT-5#PBF | TO-220 | I | $5.92 | $4.85 | 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
- 5V Output Buck Converter
- Tapped Inductor Buck Converter with 4A Output at 5V
- Positive-to-Negative Converter
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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:
LT1076
LT1076-5
LT1076HV
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.
