LTC1522 - Micropower, Regulated 5V Charge Pump DC/DC Converter
Datasheet 
DocumentationDatasheet
Spec Notice
Reliability Data
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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 ICC in Shutdown: <1µA
- Output Current: 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
Typical Application
Description
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 VIN and 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 VOUT to 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.MS-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1522CMS8#PBF | MSOP | 8 | C | $2.50 | $1.95 |
| LTC1522CMS8#TRPBF | MSOP | 8 | C | $2.01 | |
| LTC1522CS8#PBF | SO | 8 | C | $2.15 | $1.75 |
| LTC1522CS8#TRPBF | SO | 8 | C | $1.81 | |
| LTC1522IS8#PBF | SO | 8 | I | $2.30 | $2.00 |
| LTC1522IS8#TRPBF | SO | 8 | I | $2.06 | |
| LTC1522CMS8 | MSOP | 8 | C | $5.00 | $3.90 |
| LTC1522CMS8#TR | MSOP | 8 | C | $4.02 | |
| LTC1522CS8 | SO | 8 | C | $4.30 | $3.50 |
| LTC1522CS8#TR | SO | 8 | C | $3.62 | |
| LTC1522IS8 | SO | 8 | I | $4.60 | $4.00 |
| LTC1522IS8#TR | SO | 8 | I | $4.12 |
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.