Overview
| Information | |
|---|---|
| # of Outputs | |
| IOUT (A) | |
| Peak Switch Current (A) | |
| VIN MIN (V) | |
| VIN MAX (V) | |
| Startup Voltage (V) | |
| IQ (µA) | |
| VOUT MIN (V) | |
| VOUT MAX (V) | |
| Frequency (kHz) | |
| Efficiency (%) | |
| Operating Temperature (°C) | |
| Package | |
| Special Features |
The SP6644/6645 devices are high-efficiency, low-power step-up DC-DC converters ideal for single or dual alkaline cell applications such as pagers, remote controls, pointing devices, medical monitors and other low-power portable end products. Designers can control the SP6644 device with an active low shutdown input. The SP6644 device features an active low output for batteries below +1.0V. The SP6645 device features an active low output for batteries below +2.0V. Both devices contain a 0.8Ω synchronous rectifier, a 0.5Ω N-channel MOSFET power switch, an internal voltage reference, circuitry for pulse-frequency-modulation and an under voltage comparator. The output voltage for the SP6644/6645 devices is preset to +3.3V ± 4% or can be adjusted from +2V to +5.5V by manipulating two external resistors.
- 90mA output current at 1.3V input
- 190mA output current at 2.6V input
- +2V to +5.5V output range
- 0.88V guaranteed start-up
- 92% high efficiency
- 1.6µA quiescent supply current at VBATT
- Reverse battery protection
- Internal synchronous rectifier
- 5nA logic controlled shutdown current from VBATT
- Low-battery detection active LOW output
- Small 8-pin MSOP package
- Flexibility to optimize inductor type with programmable peak current control
- No external FETs
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SP6644/6645 Single/Dual Alkaline Cell, High Efficiency Boost DC-DC Regulator | 1.0.0 | November 2004 | 209.6 KB |
| Application Notes | ANP-28, Filter Design in Continuous Conduction Mode (CCM) of Operation; Part 2 Boost Regulator | A | March 2006 | 285.9 KB |
| Product Brochures | Power Management Brochure | R01 | November 2024 | 2.4 MB |
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| SP6644EU | MSOP8 | -40 | 85 | OBS | ||
| SP6644EU-L | MSOP8 | -40 | 85 | OBS | SP6648EU-L | |
| SP6644EU-L/TR | MSOP8 | -40 | 85 | OBS | SP6648EU-L/TR | |
| SP6644EU/TR | MSOP8 | -40 | 85 | OBS |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| MSOP8 |
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Notifications
FAQs & Support
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The Parts & Purchasing section of the product page shows the Status of all orderable part numbers for that product. Click Show obsolete parts, to see all EOL or OBS products.
