Catalog
Micropower, Regulated 5V Charge Pump DC/DC Converter
| Part | Package / Case | Package / Case | Number of Outputs | Synchronous Rectifier | Voltage - Input (Max) [Max] | Function | Frequency - Switching | Supplier Device Package | Output Configuration | Voltage - Input (Min) [Min] | Mounting Type | Output Type | Voltage - Output (Min/Fixed) | Operating Temperature [Max] | Operating Temperature [Min] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc LTC1522CS8#TRPBF | 3.9 mm | 8-SOIC | 1 | 5 V | Step-Up | 700 kHz | 8-SO | Positive | 2.7 V | Surface Mount | 27.03 °C/W | 5 V | 70 °C | 0 °C | |
Analog Devices Inc LTC1522IS8#TRPBF | 3.9 mm | 8-SOIC | 1 | 5 V | Step-Up | 700 kHz | 8-SO | Positive | 2.7 V | Surface Mount | 27.03 °C/W | 5 V | 70 °C | 0 °C |
Key Features
• Ultralow Power: Typical Operating ICC= 6µA
• Short-Circuit/Thermal Protected
• Regulated 5V ±4% Output Voltage
• 2.7V to 5V Input Range
• No Inductors
• Very Low ICCin Shutdown: <1µA
• Output Current:10mA (VIN≥ 2.7V)20mA (VIN≥ 3V)
• 10mA (VIN≥ 2.7V)
• 20mA (VIN≥ 3V)
• Shutdown Disconnects Load from VIN
• Internal Oscillator: 700kHz
• Compact Application Circuit (<0.1 in2)
• 8-Pin MSOP and SO Packages
Description
AI
The LTC1522 is a micropower charge pump DC/DC converter that produces a regulated 5V output from a 2.7V to 5V input supply. Extremely low supply current (6µA typical with no load, <1µA in shutdown) and low external parts count (one 0.22µF flying capacitor and two 10µF capacitors at VINand VOUT) make the LTC1522 ideally suited for small, light load battery-powered applications. Typical efficiency (VIN= 3V) exceeds 75% with load currents between 50µA and 20mA. Modulating the SHDN pin keeps the typical efficiency above 75% with load currents all the way down to 10µA.The LTC1522 has thermal shutdown and can survive a continuous short from VOUTto GND. In shutdown the load is disconnected from VIN. The part is available in 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where VIN≥ 2.7V and IOUT≤ 20mA.ApplicationsSIM Interface Supplies for GSM Cellular TelephonesLi-Ion Battery Backup SuppliesLocal 3V to 5V ConversionSmart Card ReadersPCMCIA Local 5V Supplies