LT3495 - 650mA Micropower Low Noise Boost Converter with Output Disconnect
Datasheet 
DocumentationDatasheet
Reliability Data
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- LT3495 Demo Circuit - 650mA µPower Low Noise Boost Converter (3.6V to 16V @ 70mA)
- LT3495-1 Demo Circuit - 650mA µPower Low Noise Boost Converter (3.6V to 16V @ 30mA)
- LT3495B Demo Circuit - 350mA µPower Low Noise Boost Converter (3.6V to 16V @ 70mA)
- LT3495B-1 Demo Circuit - 350mA µPower Low Noise Boost Converter (3.6V to 16V @ 30mA)
Features
- Low Quiescent Current
60μA in Active Mode
0.1μA in Shutdown Mode - Low Noise Control Scheme (Switching Frequency Always Stays Above Audible Range for LT3495/-1)
- Integrated Power NPN:
650mA Current Limit (LT3495/B)
350mA Current Limit (LT3495-1/B-1) - Integrated Output Disconnect
- Integrated Output Dimming
- Wide input range: 2.5V to 16V
- Wide output range : Up to 40V
- Integrated feedback resistor
- Tiny 10-Lead 3mm × 2mm DFN Package
Typical Application
Description
The LT3495/LT3495B/LT3495-1/LT3495B-1 are low noise boost converters with integrated power switch, feedback resistor and output disconnect circuitry. The parts control power delivery by varying both the peak inductor current and switch off-time. This novel* control scheme results in low output voltage ripple as well as high efficiency over a wide load range. For the LT3495/LT3495-1, the off-time of the switch is not allowed to exceed a fixed level, guaranteeing the switching frequency stays above the audio band for the entire load range. The parts feature a high performance NPN power switch with a 650mA and 350mA current limit for the LT3495/LT3495B and LT3495-1/LT3495B-1 respectively. The quiescent current is a low 60μA, which is further reduced to 0.1μA in shutdown. The internal disconnect circuitry allows the output voltage to be isolated from the input during shutdown. An auxiliary reference input (CTRL pin) overrides the internal 1.235V feedback reference with any lower value allowing full control of the output voltage during operation. The LT3495 series are available in a tiny 10-lead 3mm × 2mm DFN package.3x2 DFN-10
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT3495BEDDB#PBF | DFN | 10 | E | $2.50 | |
| LT3495BEDDB#TRMPBF | DFN | 10 | E | $2.50 | $1.80 |
| LT3495BEDDB#TRPBF | DFN | 10 | E | $2.50 | $1.75 |
| LT3495BEDDB-1#PBF | DFN | 10 | E | $2.50 | |
| LT3495BEDDB-1#TRMPBF | DFN | 10 | E | $2.50 | $1.80 |
| LT3495BEDDB-1#TRPBF | DFN | 10 | E | $2.50 | $1.75 |
| LT3495EDDB#PBF | DFN | 10 | E | $2.50 | |
| LT3495EDDB#TRMPBF | DFN | 10 | E | $2.50 | $1.80 |
| LT3495EDDB#TRPBF | DFN | 10 | E | $2.50 | $1.75 |
| LT3495EDDB-1#PBF | DFN | 10 | E | $2.50 | |
| LT3495EDDB-1#TRMPBF | DFN | 10 | E | $2.50 | $1.80 |
| LT3495EDDB-1#TRPBF | DFN | 10 | E | $2.50 | $1.75 |
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 |
|---|---|---|---|
| DC1219A-A | LT3495EDDB Demo Board | 3-6Vin to 15Vout at 75mA | $75.00 | |
| DC1219A-B | LT3495BEDDB Demo Board | Micropower 3-6Vin to 15Vout at 75mA | $75.00 | |
| DC1219A-C | LT3495EDDB-1 Demo Board | Micropower 3-6Vin to 15Vout at 36mA | $75.00 | |
| DC1219A-D | LT3495BEDDB-1 Demo Board | 3-6Vin to 15Vout at 36mA | $75.00 |