LT3030 - Dual 750mA/250mA Low Dropout, Low Noise, Micropower Linear Regulator
Features
- Output Current: 750mA/250mA
- Low Dropout Voltage: 300mV
- Low Noise: 20μVRMS (10Hz to 100kHz)
- Low Quiescent Current: 120μA/75μA
- Wide Input Voltage Range: 1.7V to 20V
- Adjustable Output: 1.220V Reference Voltage
- Shutdown Quiescent Current: <1μA
- Stable with 10μF/3.3μF Minimum Output Capacitor
- Stable with Ceramic, Tantalum or Aluminum Electrolytic Capacitors
- Precision Threshold for Shutdown Logic or UVLO Function
- PWRGD Flag for each Output
- Reverse Battery and Reverse Output-to-Input Protection
- Current Limit with Foldback and Thermal Shutdown
- Thermally Enhanced 20-Lead TSSOP and 28-Lead (4mm × 5mm) QFN Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LT®3030 is a dual, micropower, low noise, low dropout linear regulator. The device operates with either common or independent input supplies for each channel, over a 1.7V to 20V input voltage range. Output 1/Output 2 supply 750mA/250mA respectively with a typical dropout voltage of 300mV. With an external 10nF bypass capacitor, output noise is only 20μVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 120μA/75μA quiescent current makes it an ideal choice. In shutdown, quiescent current drops to less than 1μA. Shutdown control is independent for each channel and its precision logic threshold allows for voltage lockout functionality. The LT3030 includes a PWRGD flag for each channel to indicate output regulation.
The LT3030 optimizes stability and transient response with low ESR ceramic output capacitors, requiring a minimum of only 10μF/3.3μF.
Internal circuitry provides reverse-battery protection, reverse-current protection, current limiting with foldback and thermal shutdown with hysteresis. The adjustable output voltage device has a 1.220V reference voltage. The LT3030 is offered in the thermally enhanced 20-lead TSSOP and 28-lead, low profile (4mm × 5mm × 0.75mm) QFN packages.
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 |
|---|---|---|---|---|---|
| LT3030EFE#PBF | TSSOP-20 | FE | E | 05-08-1663 (CB) | Yes |
| LT3030EFE#TRPBF | TSSOP-20 | FE | E | 05-08-1663 (CB) | Yes |
| LT3030EUFD#PBF | 4x5 QFN-28 | UFD | E | 05-08-1712 | Yes |
| LT3030EUFD#TRPBF | 4x5 QFN-28 | UFD | E | 05-08-1712 | Yes |
| LT3030HFE#PBF | TSSOP-20 | FE | H | 05-08-1663 (CB) | Yes |
| LT3030HFE#TRPBF | TSSOP-20 | FE | H | 05-08-1663 (CB) | Yes |
| LT3030HUFD#PBF | 4x5 QFN-28 | UFD | H | 05-08-1712 | Yes |
| LT3030HUFD#TRPBF | 4x5 QFN-28 | UFD | H | 05-08-1712 | Yes |
| LT3030IFE#PBF | TSSOP-20 | FE | I | 05-08-1663 (CB) | Yes |
| LT3030IFE#TRPBF | TSSOP-20 | FE | I | 05-08-1663 (CB) | Yes |
| LT3030IUFD#PBF | 4x5 QFN-28 | UFD | I | 05-08-1712 | Yes |
| LT3030IUFD#TRPBF | 4x5 QFN-28 | UFD | I | 05-08-1712 | Yes |
| LT3030MPFE#PBF | TSSOP-20 | FE | MP | 05-08-1663 (CB) | Yes |
| LT3030MPFE#TRPBF | TSSOP-20 | FE | MP | 05-08-1663 (CB) | 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 | |
|---|---|---|---|---|---|---|
| LT3030EFE#PBF | TSSOP-20 | E | $4.67 | $3.27 | Yes | |
| LT3030EFE#TRPBF | TSSOP-20 | E | $3.33 | Yes | ||
| LT3030EUFD#PBF | 4x5 QFN-28 | E | $4.67 | $3.27 | Yes | |
| LT3030EUFD#TRPBF | 4x5 QFN-28 | E | $3.33 | Yes | ||
| LT3030HFE#PBF | TSSOP-20 | H | $5.62 | $3.93 | Yes | |
| LT3030HFE#TRPBF | TSSOP-20 | H | $3.99 | Yes | ||
| LT3030HUFD#PBF | 4x5 QFN-28 | H | $5.62 | $3.93 | Yes | |
| LT3030HUFD#TRPBF | 4x5 QFN-28 | H | $3.99 | Yes | ||
| LT3030IFE#PBF | TSSOP-20 | I | $5.14 | $3.60 | Yes | |
| LT3030IFE#TRPBF | TSSOP-20 | I | $3.66 | Yes | ||
| LT3030IUFD#PBF | 4x5 QFN-28 | I | $5.14 | $3.60 | Yes | |
| LT3030IUFD#TRPBF | 4x5 QFN-28 | I | $3.66 | Yes | ||
| LT3030MPFE#PBF | TSSOP-20 | MP | $12.60 | $8.82 | Yes | |
| LT3030MPFE#TRPBF | TSSOP-20 | MP | $8.88 | 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.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1855A | LT3030 Demo Board | Dual, Low Noise, Micropower Linear Regulator 2.2V ≤ VIN ≤ 20V, Vout1/Vout2 = 1.5V/1.8V/2.5V/3.3V/5V @ 750mA/250mA | $75.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT3030HFE#PBF | TSSOP-20 | H | $5.62 | $3.93 | Yes | |
| LT3030HFE#TRPBF | TSSOP-20 | H | $3.99 | Yes | ||
| LT3030HUFD#PBF | 4x5 QFN-28 | H | $5.62 | $3.93 | Yes | |
| LT3030HUFD#TRPBF | 4x5 QFN-28 | H | $3.99 | Yes | ||
| LT3030IFE#PBF | TSSOP-20 | I | $5.14 | $3.60 | Yes | |
| LT3030IFE#TRPBF | TSSOP-20 | I | $3.66 | Yes | ||
| LT3030IUFD#PBF | 4x5 QFN-28 | I | $5.14 | $3.60 | Yes | |
| LT3030IUFD#TRPBF | 4x5 QFN-28 | I | $3.66 | Yes | ||
| LT3030MPFE#PBF | TSSOP-20 | MP | $12.60 | $8.82 | Yes | |
| LT3030MPFE#TRPBF | TSSOP-20 | MP | $8.88 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- General Purpose Linear Regulator
- Battery-Powered Systems
- Microprocessor Core/Logic Supplies
- Post Regulator for Switching Supplies
- Tracking/Sequencing Power Supplies
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Design Tools
LTspice
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LT3030
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.
