LT1964 - 200mA, Low Noise, Low Dropout Negative Micropower Regulator
Features
- Low Noise: 30µVRMS (10Hz to 100kHz)
- Low Quiescent Current: 30µA
- Low Dropout Voltage: 340mV
- Output Current: 200mA
- Fixed Output Voltage: -5V
- Adjustable Output from -1.22V to -20V
- Positive or Negative Shutdown Logic
- 3µA Quiescent Current in Shutdown
- Stable with 1µF Output Capacitor
- Stable with Aluminum, Tantalum, or Ceramic Capacitors
- Thermal Limiting
- Low Profile (1mm) ThinSOT and (0.75mm) 8-Pin
3mm × 3mm DFN Packages
Typical Application
Description
The LT1964 is a micropower low noise, low dropout negative regulator. The device is capable of supplying 200mA of output current with a dropout voltage of 340mV. Low quiescent current (30µA operating and 3µA shutdown) makes the LT1964 an excellent choice for battery-powered applications. Quiescent current is well controlled in dropout.
Other features of the LT1964 include low output noise. With the addition of an external 0.01µF bypass capacitor, output noise is reduced to 30µVRMS over a 10Hz to 100kHz bandwidth. The LT1964 is capable of operating with small capacitors and is stable with output capacitors as low as 1µF. Small ceramic capacitors can be used without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse output protection, current limiting, and thermal limiting. The device is available with a fixed output voltage of -5V and as an adjustable device with a -1.22V reference voltage. The LT1964 regulators are available in a low profile (1mm) ThinSOT and the low profile (0.75mm) 8-pin
(3mm × 3mm) DFN 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 |
|---|---|---|---|---|---|
| LT1964EDD#PBF | 3x3 DFN-8 | DD | E | 05-08-1698 | Yes |
| LT1964EDD#TRPBF | 3x3 DFN-8 | DD | E | 05-08-1698 | Yes |
| LT1964ES5-5#PBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-5#TRMPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-5#TRPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-BYP#PBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-BYP#TRMPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-BYP#TRPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-SD#PBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-SD#TRMPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964ES5-SD#TRPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT1964IDD#PBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT1964IDD#TRPBF | 3x3 DFN-8 | DD | I | 05-08-1698 | Yes |
| LT1964IS5-5#PBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-5#TRMPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-5#TRPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-BYP#PBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-BYP#TRMPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-BYP#TRPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-SD#PBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-SD#TRMPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT1964IS5-SD#TRPBF | SOT-23 | S5 | I | 05-08-1635 | 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 | |
|---|---|---|---|---|---|---|
| LT1964EDD#PBF | 3x3 DFN-8 | E | $2.16 | $1.51 | Yes | |
| LT1964EDD#TRPBF | 3x3 DFN-8 | E | $1.57 | Yes | ||
| LT1964ES5-5#PBF | SOT-23 | E | $2.02 | Yes | ||
| LT1964ES5-5#TRMPBF | SOT-23 | E | $2.02 | $1.46 | Yes | |
| LT1964ES5-5#TRPBF | SOT-23 | E | $2.02 | $1.41 | Yes | |
| LT1964ES5-BYP#PBF | SOT-23 | E | $2.02 | Yes | ||
| LT1964ES5-BYP#TRMPBF | SOT-23 | E | $2.02 | $1.46 | Yes | |
| LT1964ES5-BYP#TRPBF | SOT-23 | E | $2.02 | $1.41 | Yes | |
| LT1964ES5-SD#PBF | SOT-23 | E | $2.02 | Yes | ||
| LT1964ES5-SD#TRMPBF | SOT-23 | E | $2.02 | $1.46 | Yes | |
| LT1964ES5-SD#TRPBF | SOT-23 | E | $2.02 | $1.41 | Yes | |
| LT1964IDD#PBF | 3x3 DFN-8 | I | $2.49 | $1.74 | Yes | |
| LT1964IDD#TRPBF | 3x3 DFN-8 | I | $1.80 | Yes | ||
| LT1964IS5-5#PBF | SOT-23 | I | $2.31 | Yes | ||
| LT1964IS5-5#TRMPBF | SOT-23 | I | $2.31 | $1.67 | Yes | |
| LT1964IS5-5#TRPBF | SOT-23 | I | $2.31 | $1.62 | Yes | |
| LT1964IS5-BYP#PBF | SOT-23 | I | $2.31 | Yes | ||
| LT1964IS5-BYP#TRMPBF | SOT-23 | I | $2.31 | $1.67 | Yes | |
| LT1964IS5-BYP#TRPBF | SOT-23 | I | $2.31 | $1.62 | Yes | |
| LT1964IS5-SD#PBF | SOT-23 | I | $2.31 | Yes | ||
| LT1964IS5-SD#TRMPBF | SOT-23 | I | $2.31 | $1.67 | Yes | |
| LT1964IS5-SD#TRPBF | SOT-23 | I | $2.31 | $1.62 | 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 |
|---|---|---|---|
| DC437A | LT1964ES56 Demo Board | Negative Low Noise LDO Regulator, -2.3V ≤ VIN ≤ -20V, Vout = -1.22V/-5V @ 200mA | $75.00 | |
| Buy Now | |||
Applications
- Battery-Powered Instruments
- Low Noise Regulator for Noise-Sensitive Instrumentation
- Negative Complement to LT1761 Family of Positive LDOs
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LT1964-5
LT1964-BYP
LT1964-SD
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.
