Catalog
Micropower Low Dropout Regulators with Shutdown
| Part | Current - Quiescent (Iq) | Control Features | Current - Output | Output Type | Voltage - Output (Min/Fixed) | Mounting Type | Number of Regulators | Voltage Dropout (Max) [Max] | PSRR | Operating Temperature [Min] | Operating Temperature [Max] | Package / Case | Output Configuration | Voltage - Input (Max) [Max] | Supplier Device Package | Protection Features | Package / Case [y] | Package / Case [x] | Output Type | Voltage - Output (Max) [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices LT1129MPST-3.3 | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -55 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CST-5#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IT-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Through Hole | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-220-5 | Positive | 30 V | TO-220-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CS8-5#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | ||
Analog Devices LT1129IQ-5#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IST-3.3#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CQ-5#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CQ-3.3#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CST-5#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IST-5 | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CST-3.3#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IST-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CQ-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CQ#TRPBF | 70 µA | Enable | 700 mA | 3.8 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | Adjustable | 30 V | |||
Analog Devices LT1129IST-5#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129CT#PBF | 70 µA | Enable | 700 mA | 3.8 V | Through Hole | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | TO-220-5 | Positive | 30 V | TO-220-5 | Over Temperature, Reverse Polarity | Adjustable | 30 V | |||
Analog Devices LT1129CS8-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | ||
Analog Devices LT1129IQ-3.3#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IT-5#06PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Through Hole | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | TO-220-5 | Positive | 30 V | TO-220-5 Flow 6 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IQ#PBF | 70 µA | Enable | 700 mA | 3.8 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | Adjustable | 30 V | |||
Analog Devices LT1129IS8-5#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | ||
Analog Devices LT1129IS8#PBF | 70 µA | Enable | 700 mA | 3.8 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | Adjustable | 30 V | |
Analog Devices LT1129IQ-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IS8-5#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | ||
Analog Devices LT1129CT-5#06PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 5 V | Through Hole | 1 | 0.7 V | 64 dB | 0 °C | 125 °C | TO-220-5 | Positive | 30 V | TO-220-5 Flow 6 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129MPST-3.3#PBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -55 °C | 125 °C | TO-261-4, TO-261AA | Positive | 30 V | SOT-223-3 | Over Temperature, Reverse Polarity | ||||
Analog Devices LT1129IQ | 70 µA | Enable | 700 mA | 3.8 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | D2PAK (5 Leads + Tab), TO-263-6, TO-263BA | Positive | 30 V | DDPAK-5 | Over Temperature, Reverse Polarity | Adjustable | 30 V | |||
Analog Devices LT1129IS8#TRPBF | 70 µA | Enable | 700 mA | 3.8 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in | Adjustable | 30 V | |
Analog Devices LT1129IS8-3.3#TRPBF | 70 µA | Enable | 700 mA | 1.81 mOhm | 3.3 V | Surface Mount | 1 | 0.7 V | 64 dB | -40 °C | 125 °C | 8-SOIC | Positive | 30 V | 8-SO | Over Temperature, Reverse Polarity | 3.9 mm | 0.154 in |
Key Features
• 400mV Dropout Voltage
• 700mA Output Current
• 50μA Quiescent Current
• No Protection Diodes Needed
• Adjustable Output from 3.8V to 30V
• 3.3V and 5V Fixed Output Voltages
• Controlled Quiescent Current in Dropout
• Shutdown
• 16μA Quiescent Current in Shutdown
• Stable with 3.3μF Output Capacitor
• Reverse Battery Protection
• No Reverse Output Current
• Thermal Limiting
• Surface Mount SOT-223 and DD-Pak Packages
Description
AI
The LT1129/LT1129-3.3/LT1129-5 are micropower low dropout regulators with shutdown. The devices are capable of supplying 700mA of output current with a dropout voltage of 400mV at maximum output. Designed for use in battery-powered systems, the low quiescent current, 50μA operating and 16μA in shutdown, make them an ideal choice. The quiescent current does not rise in dropout as it does with many other low dropout PNP regulators.Other features of the LT1129/LT1129-3.3/LT1129-5 include the ability to operate with small output capacitors. They are stable with only 3.3μF on the output while most older devices require between 10μF and 100μF for stability. Also the input may be connected to ground or a reverse voltage without reverse current flow from output to input. This makes the LT1129/LT1129-3.3/LT1129-5 ideal for backup power situations where the output is held high and the input is at ground or reversed. Under these conditions, only 16μA will flow from the output pin to ground. The devices are available in 5-lead TO-220, 5-lead DD-Pak and 3-lead SOT-223 packages.ApplicationsLow Current RegulatorRegulator for Battery-Powered SystemsPost Regulator for Switching Supplies5V to 3.3V Logic Regulator