DocumentationDatasheet
Reliability Data
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Features
- 1.5V to 12V Operating Supply Voltage Range
- 13V Absolute Maximum Rating
- 200μA Maximum No Load Supply Current at 5V
- Boost Pin (Pin 1) for Higher Switching Frequency
- 97% Minimum Open Circuit Voltage Conversion Efficiency
- 95% Minimum Power Conversion Efficiency
- IS = 1.5μA with 5V Supply When OSC Pin = 0V or V+
- High Voltage Upgrade to ICL7660/LTC1044
Typical Application
Description
The LTC®1044A is a monolithic CMOS switched-capacitor voltage converter. It plugs in for ICL7660/LTC1044 in applications where higher input voltage (up to 12V) is needed. The LTC1044A provides several conversion functions without using inductors. The input voltage can be inverted (VOUT = –VIN), doubled (VOUT = 2VIN), divided (VOUT = VIN/2) or multiplied (VOUT = ±nVIN).
To optimize performance in specific applications, a boost function is available to raise the internal oscillator frequency by a factor of seven. Smaller external capacitors can be used in higher frequency operation to save board space. The internal oscillator can also be disabled to save power. The supply current drops to 1.5μA at 5V input when the OSC pin is tied to GND or V+.
N-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1044ACN8#PBF | PDIP | 8 | C | $2.75 | $2.20 |
| LTC1044ACS8#PBF | SO | 8 | C | $2.92 | $2.35 |
| LTC1044ACS8#TRPBF | SO | 8 | C | $2.41 | |
| LTC1044AIN8#PBF | PDIP | 8 | I | $3.00 | $2.40 |
| LTC1044AIS8#PBF | SO | 8 | I | $3.17 | $2.55 |
| LTC1044AIS8#TRPBF | SO | 8 | I | $2.61 | |
| LTC1044CN8#PBF | PDIP | 8 | C | $2.05 | $1.65 |
| LTC1044CS8#PBF | SO | 8 | C | $2.75 | $2.25 |
| LTC1044CS8#TRPBF | SO | 8 | C | $2.31 | |
| LTC1044ACN8 | PDIP | 8 | C | $5.50 | $4.40 |
| LTC1044ACS8 | SO | 8 | C | $5.84 | $4.70 |
| LTC1044ACS8#TR | SO | 8 | C | $4.82 | |
| LTC1044AIN8 | PDIP | 8 | I | $6.00 | $4.80 |
| LTC1044AIS8 | SO | 8 | I | $6.34 | $5.10 |
| LTC1044AIS8#TR | SO | 8 | I | $5.22 | |
| LTC1044CN8 | PDIP | 8 | C | $4.10 | $3.30 |
| LTC1044CS8 | SO | 8 | C | $5.50 | $4.50 |
| LTC1044CS8#TR | SO | 8 | C | $4.62 |
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.