LT1764A - 3A, Fast Transient Response, Low Noise, LDO Regulators
Features
- Optimized for Fast Transient Response
- Output Current: 3A
- Dropout Voltage: 340mV at 3A
- Low Noise: 40µVRMS (10Hz to 100kHz)
- 1mA Quiescent Current
- Wide Input Voltage Range: 2.7V to 20V
- No Protection Diodes Needed
- Controlled Quiescent Current in Dropout
- Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
- Adjustable Output from 1.21V to 20V
- <1µA Quiescent Current in Shutdown
- Stable with 10µF Output Capacitor
- Reverse Battery Protection
- No Reverse Current
- Thermal Limiting
Typical Application
Description
The LT1764A is a low dropout regulator optimized for fast transient response. The device is capable of supplying 3A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the LT1764A has very low output voltage noise which makes the device ideal for sensitive RF supply applications.
Output voltage range is from 1.21V to 20V. The LT1764A regulators are stable with output capacitors as low as 10µF. Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The device is available in fixed output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable device with a 1.21V reference voltage. The LT1764A regulators are available in 5-lead TO-220 and DD packages, and 16-lead FE packages.
| Features | |
| LT1764 | - |
| LT1764A | Stable With Ceramic Output Capacitors |
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 |
|---|---|---|---|---|---|
| LT1764AEFE-1.5#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-1.5#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-1.8#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-1.8#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-2.5#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-2.5#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-3.3#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE-3.3#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE#PBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEFE#TRPBF | TSSOP-16 | FE | E | 05-08-1663 (BB) | Yes |
| LT1764AEQ-1.5#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-1.5#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-1.8#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-1.8#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-2.5#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-2.5#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-3.3#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ-3.3#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ#PBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AEQ#TRPBF | DDPAK-5 | Q | E | 05-08-1461 | Yes |
| LT1764AET-1.5#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET-1.8#30PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET-1.8#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET-2.5#06PBF | TO-220 | T | E | 05-08-1421 (Flow 06) | Yes |
| LT1764AET-2.5#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET-3.3#06PBF | TO-220 | T | E | 05-08-1421 (Flow 06) | Yes |
| LT1764AET-3.3#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET#06PBF | TO-220 | T | E | 05-08-1421 (Flow 06) | Yes |
| LT1764AET#30PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET#31PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AET#PBF | TO-220 | T | E | 05-08-1421 (Standard) | Yes |
| LT1764AMPQ | DDPAK-5 | Q | MP | 05-08-1461 | No |
| LT1764AMPQ#PBF | DDPAK-5 | Q | MP | 05-08-1461 | Yes |
| LT1764AMPQ#TR | DDPAK-5 | Q | MP | 05-08-1461 | No |
| LT1764AMPQ#TRPBF | DDPAK-5 | Q | MP | 05-08-1461 | 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
sales office or authorized distributor.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
- 3.3V to 2.5V Logic Power Supply
- Post Regulator for Switching Supplies
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT1764
LT1764-1.5
LT1764-1.8
LT1764-2.5
LT1764-3.3
LT1764A
LT1764A-1.5
LT1764A-1.8
LT1764A-2.5
LT1764A-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.
