LT1963A Series - 1.5A, Low Noise, Fast Transient Response LDO Regulators
Datasheet 
DocumentationDatasheet
Application Note
Reliability Data
cad_symbol
ltspice
Features
- Optimized for Fast Transient Response
- Output Current: 1.5A
- Dropout Voltage: 340mV
- Low Noise: 40μVRMS (10Hz to 100kHz)
- 1mA Quiescent Current
- 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*
- Stable with Ceramic Capacitors*
- Reverse Battery Protection
- No Reverse Current
- Thermal Limiting
- 5-Lead TO-220, DD, 3-Lead SOT-223 and 8-Lead SO Packages
Typical Application
Description
The LT®1963A series are low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A 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 LT1963A regulators have very low output noise which makes them ideal for sensitive RF supply applications.
Output voltage range is from 1.21V to 20V. The LT1963A 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 devices are 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 LT1963A regulators are available in 5-lead TO-220, DD, 3‑lead SOT-223, 8-lead SO and 16-lead TSSOP packages.
| Features | |
| LT1963 | - |
| LT1963A | Stable With Ceramic Output Capacitors |
DDPAK-5,SO-8,SOT-223,TO-220,TSSOP-16
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1963AEFE#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963AEFE#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963AEFE-1.5#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963AEFE-1.5#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963AEFE-1.8#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963AEFE-1.8#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963AEFE-2.5#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963AEFE-2.5#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963AEFE-3.3#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963AEFE-3.3#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963AEQ#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963AEQ#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963AEQ-1.5#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963AEQ-1.5#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963AEQ-1.8#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963AEQ-1.8#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963AEQ-2.5#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963AEQ-2.5#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963AEQ-3.3#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963AEQ-3.3#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963AES8#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963AES8#TRPBF | SO | 8 | E | $2.20 | |
| LT1963AES8-1.5#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963AES8-1.5#TRPBF | SO | 8 | E | $2.20 | |
| LT1963AES8-1.8#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963AES8-1.8#TRPBF | SO | 8 | E | $2.20 | |
| LT1963AES8-2.5#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963AES8-2.5#TRPBF | SO | 8 | E | $2.20 | |
| LT1963AES8-3.3#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963AES8-3.3#TRPBF | SO | 8 | E | $2.20 | |
| LT1963AEST-1.5#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963AEST-1.5#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963AEST-1.8#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963AEST-1.8#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963AEST-2.5#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963AEST-2.5#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963AEST-3.3#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963AEST-3.3#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963AET#06PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET#PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-1.5#06PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-1.5#PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-1.8#06PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-1.8#30PBF | TO-220 | 5 | E | $4.02 | $2.95 |
| LT1963AET-1.8#PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-2.5#06PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-2.5#30PBF | TO-220 | 5 | E | $4.02 | $2.95 |
| LT1963AET-2.5#PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-3.3#06PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AET-3.3#30PBF | TO-220 | 5 | E | $4.02 | $2.95 |
| LT1963AET-3.3#PBF | TO-220 | 5 | E | $3.57 | $2.50 |
| LT1963AIFE#PBF | TSSOP | 16 | I | $3.97 | $2.78 |
| LT1963AIFE#TRPBF | TSSOP | 16 | I | $2.84 | |
| LT1963AIQ#PBF | DD PAK | 5 | I | $3.97 | $2.78 |
| LT1963AIQ#TRPBF | DD PAK | 5 | I | $2.90 | |
| LT1963AIS8#PBF | SO | 8 | I | $3.43 | $2.40 |
| LT1963AIS8#TRPBF | SO | 8 | I | $2.46 | |
| LT1963AIT#PBF | TO-220 | 5 | I | $3.97 | $2.78 |
| LT1963AMPQ | DD PAK | 5 | MP | $9.64 | $6.75 |
| LT1963AMPQ#PBF | DD PAK | 5 | MP | $9.64 | $6.75 |
| LT1963AMPQ#TR | DD PAK | 5 | MP | $6.85 | |
| LT1963AMPQ#TRPBF | DD PAK | 5 | MP | $6.85 | |
| LT1963AMPS8#TR | SO | 8 | MP | $5.86 | |
| LT1963EFE#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963EFE#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963EFE-1.5#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963EFE-1.5#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963EFE-1.8#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963EFE-1.8#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963EFE-2.5#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963EFE-2.5#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963EFE-3.3#PBF | TSSOP | 16 | E | $3.57 | $2.50 |
| LT1963EFE-3.3#TRPBF | TSSOP | 16 | E | $2.62 | |
| LT1963EQ#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963EQ#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963EQ-1.5#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963EQ-1.5#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963EQ-1.8#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963EQ-1.8#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963EQ-2.5#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963EQ-2.5#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963EQ-3.3#PBF | DD PAK | 5 | E | $3.57 | $2.50 |
| LT1963EQ-3.3#TRPBF | DD PAK | 5 | E | $2.62 | |
| LT1963ES8#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963ES8#TRPBF | SO | 8 | E | $2.20 | |
| LT1963ES8-1.5#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963ES8-1.5#TRPBF | SO | 8 | E | $2.20 | |
| LT1963ES8-1.8#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963ES8-1.8#TRPBF | SO | 8 | E | $2.20 | |
| LT1963ES8-2.5#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963ES8-2.5#TRPBF | SO | 8 | E | $2.20 | |
| LT1963ES8-3.3#PBF | SO | 8 | E | $2.60 | $2.15 |
| LT1963ES8-3.3#TRPBF | SO | 8 | E | $2.20 | |
| LT1963EST-1.5#PBF | SOT | 3 | E | $2.60 | $2.15 |
| LT1963EST-1.5#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963EST-1.8#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963EST-1.8#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963EST-2.5#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963EST-2.5#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963EST-3.3#PBF | SOT | 3 | E | $2.71 | $2.15 |
| LT1963EST-3.3#TRPBF | SOT | 3 | E | $2.20 | |
| LT1963ET#06PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET#30PBF | TO-220 | 5 | E | $3.64 | $2.95 |
| LT1963ET#31PBF | TO-220 | 5 | E | $3.64 | $2.95 |
| LT1963ET#PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET-1.5#30PBF | TO-220 | 5 | E | $3.64 | $2.95 |
| LT1963ET-1.5#PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET-1.8#30PBF | TO-220 | 5 | E | $3.64 | $2.95 |
| LT1963ET-1.8#PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET-2.5#PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET-3.3#06PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963ET-3.3#30PBF | TO-220 | 5 | E | $3.64 | $2.95 |
| LT1963ET-3.3#PBF | TO-220 | 5 | E | $3.14 | $2.50 |
| LT1963AMPS8 | SO | 8 | MP | $8.29 | $5.80 |
| LT1963AMPS8#PBF | SO | 8 | MP | $8.29 | $5.80 |
| LT1963EQ | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963EQ#TR | DD PAK | 5 | E | $5.24 | |
| LT1963EQ-1.8 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963EQ-1.8#TR | DD PAK | 5 | E | $5.24 | |
| LT1963EQ-2.5 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963EQ-2.5#TR | DD PAK | 5 | E | $5.24 | |
| LT1963EQ-3.3 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963EQ-3.3#TR | DD PAK | 5 | E | $5.24 | |
| LT1963ES8 | SO | 8 | E | $5.20 | $4.30 |
| LT1963ES8#TR | SO | 8 | E | $4.40 | |
| LT1963ES8-1.8 | SO | 8 | E | $5.20 | $4.30 |
| LT1963ES8-1.8#TR | SO | 8 | E | $4.40 | |
| LT1963ES8-2.5 | SO | 8 | E | $5.20 | $4.30 |
| LT1963ES8-2.5#TR | SO | 8 | E | $4.40 | |
| LT1963ES8-3.3 | SO | 8 | E | $5.20 | $4.30 |
| LT1963ES8-3.3#TR | SO | 8 | E | $4.40 | |
| LT1963EST-1.8 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963EST-1.8#TR | SOT | 3 | E | $4.40 | |
| LT1963EST-2.5 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963EST-2.5#TR | SOT | 3 | E | $4.40 | |
| LT1963EST-3.3 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963EST-3.3#TR | SOT | 3 | E | $4.40 | |
| LT1963ET | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963ET-1.8 | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963ET-2.5 | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963ET-3.3 | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963EQ-1.5 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963EQ-1.5#TR | DD PAK | 5 | E | $5.24 | |
| LT1963ES8-1.5 | SO | 8 | E | $5.20 | $4.30 |
| LT1963ES8-1.5#TR | SO | 8 | E | $4.40 | |
| LT1963EST-1.5 | SOT | 3 | E | $5.20 | $4.30 |
| LT1963EST-1.5#TR | SOT | 3 | E | $4.40 | |
| LT1963ET-1.5 | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963AES8 | SO | 8 | E | $5.20 | $4.30 |
| LT1963AES8#TR | SO | 8 | E | $4.40 | |
| LT1963AES8-1.5 | SO | 8 | E | $5.20 | $4.30 |
| LT1963AES8-1.5#TR | SO | 8 | E | $4.40 | |
| LT1963AES8-1.8 | SO | 8 | E | $5.20 | $4.30 |
| LT1963AES8-1.8#TR | SO | 8 | E | $4.40 | |
| LT1963AES8-2.5 | SO | 8 | E | $5.20 | $4.30 |
| LT1963AES8-2.5#TR | SO | 8 | E | $4.40 | |
| LT1963AES8-3.3 | SO | 8 | E | $5.20 | $4.30 |
| LT1963AES8-3.3#TR | SO | 8 | E | $4.40 | |
| LT1963AEST-1.5 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963AEST-1.5#TR | SOT | 3 | E | $4.40 | |
| LT1963AEST-2.5 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963AEST-2.5#TR | SOT | 3 | E | $4.40 | |
| LT1963AEST-3.3 | SOT | 3 | E | $5.42 | $4.30 |
| LT1963AEST-3.3#TR | SOT | 3 | E | $4.40 | |
| LT1963AEQ | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963AEQ#TR | DD PAK | 5 | E | $5.24 | |
| LT1963AEQ-1.5 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963AEQ-1.8 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963AEQ-2.5 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963AEQ-2.5#TR | DD PAK | 5 | E | $5.24 | |
| LT1963AEQ-1.5#TR | DD PAK | 5 | E | $5.24 | |
| LT1963AEQ-3.3 | DD PAK | 5 | E | $7.14 | $5.00 |
| LT1963AEQ-3.3#TR | DD PAK | 5 | E | $5.24 | |
| LT1963AET | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AET-1.5 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AET-1.8 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AET-2.5 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AET-3.3 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AEQ-1.8#TR | DD PAK | 5 | E | $5.24 | |
| LT1963AET-2.5#06 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963EFE | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963EFE#TR | TSSOP | 16 | E | $5.24 | |
| LT1963EFE-1.5 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963EFE-1.5#TR | TSSOP | 16 | E | $5.24 | |
| LT1963EFE-1.8 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963EFE-1.8#TR | TSSOP | 16 | E | $5.24 | |
| LT1963EFE-2.5 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963EFE-2.5#TR | TSSOP | 16 | E | $5.24 | |
| LT1963EFE-3.3 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963EFE-3.3#TR | TSSOP | 16 | E | $5.24 | |
| LT1963AEFE | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963AEFE#TR | TSSOP | 16 | E | $5.24 | |
| LT1963AEFE-1.5 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963AEFE-1.5#TR | TSSOP | 16 | E | $5.24 | |
| LT1963AEFE-1.8 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963AEFE-1.8#TR | TSSOP | 16 | E | $5.24 | |
| LT1963AEFE-2.5 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963AEFE-3.3 | TSSOP | 16 | E | $7.14 | $5.00 |
| LT1963AEFE-3.3#TR | TSSOP | 16 | E | $5.24 | |
| LT1963AEFE-2.5#TR | TSSOP | 16 | E | $5.24 | |
| LT1963ET#06 | TO-220 | 5 | E | $6.28 | $5.00 |
| LT1963AET-2.5#30 | TO-220 | 5 | E | $8.04 | $5.90 |
| LT1963AET-1.8#30 | TO-220 | 5 | E | $8.04 | $5.90 |
| LT1963AET-3.3#30 | TO-220 | 5 | E | $8.04 | $5.90 |
| LT1963AET-1.8#06 | TO-220 | 5 | E | $7.14 | $5.00 |
| LT1963AIQ | DD PAK | 5 | I | $7.94 | $5.56 |
| LT1963AIFE | TSSOP | 16 | I |
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.