Regulator - LT1054, Voltage Converter w/ Regulator, 8-Pin DIP
LT1054 switched-capacitor voltage converter with regulator in an 8 pin DIP package. The LT1054 device is a bipolar, switched-capacitor voltage converter with regulator. It provides higher output current and significantly lower voltage losses than previously available converters. An adaptive-switch drive scheme optimizes efficiency over a wide range of output currents.
Total voltage drop at 100-mA output current typically is 1.1 V. This applies to the full supply-voltage range of 3.5 V to 15 V. Quiescent current typically is 2.5 mA.
The LT1054 also provides regulation, a feature previously not available in switched-capacitor voltage converters. By adding an external resistive divider, a regulated output can be obtained. This output is regulated against changes in both input voltage and output current. The LT1054 can also shut down by grounding the feedback terminal. Supply current in shutdown typically is 100 μA.
The internal oscillator of the LT1054 runs at a nominal frequency of 25 kHz. The oscillator terminal can be used to adjust the switching frequency or to externally synchronize the LT1054.
The LT1054C is characterized for operation over a free-air temperature range of 0°C to 70°C.
Features
- Output Current, 100 mA
- Low Loss, 1.1 V at 100 mA
- Operating Range, 3.5 V to 15 V
- Reference and Error Amplifier for Regulation
- External Shutdown
- External Oscillator Synchronization
- Devices Can Be Paralleled
- Pin-to-Pin Compatible With the LTC1044/7660 charge pumps
| Junction-to-ambient thermal resistance | 85 °C/W | ||
| Max.. Recommended Supply Voltage | 12 V | ||
| Max. FB/SD Input voltage | VCC | ||
| Max. Input regulation 9VCC = 7 V to 12 V, RL = 500 Ω) | 25 mV | ||
| Max. Junction temperature | 125 °C | ||
| Max. Maximum switch current | 4 mA | ||
| Max. OSC Input voltage | Vref | ||
| Max. Oscillator frequency (VCC = 3.5 V to 15 V) | 35 kHz | ||
| Max. Output regulation (VCC = 7 V, RL = 100 Ω to 500 Ω) | 50 mV | ||
| Max. Output resistance (ΔIO = 10 mA to 100 mA) | 15 Ω | ||
| Max. Regulated output voltage (VCC = 7 V, TJ = 25°C, RL = 500 Ω) | -5.2 V | ||
| Max. Storage temperature | -55 to 150 °C | ||
| Max. Supply voltage | 16 V | ||
| Min. FB/SD Input voltage | 0 V | ||
| Min. OSC Input voltage | 0 V | ||
| Min. Oscillator frequency (VCC = 3.5 V to 15 V) | 15 kHz | ||
| Min. Recommended Supply Voltage | 3.5 V | ||
| Min. Regulated output voltage (VCC = 7 V, TJ = 25°C, RL = 500 Ω) | -4.7 V | ||
| Supply current (VCC = 3.5 V) | 5 mA | ||
| Supply current (VCC = 15 V) | 200 mA | ||
| Supply current in shutdown | 100 μA | ||
| Typ. Input regulation 9VCC = 7 V to 12 V, RL = 500 Ω) | 5mV | ||
| Typ. Maximum switch current | 300 mA | ||
| Typ. Oscillator frequency (VCC = 3.5 V to 15 V) | 25 kHz | ||
| Typ. Output regulation (VCC = 7 V, RL = 100 Ω to 500 Ω) | 10 mV | ||
| Typ. Output resistance (ΔIO = 10 mA to 100 mA) | 10 Ω | ||
| Typ. Regulated output voltage (VCC = 7 V, TJ = 25°C, RL = 500 Ω) | 5 V | ||
| Packaging Dimensions | 0.365 in. × 0.35 in. × 0.28 in. | ||
| Weight (Packaging) | 0.0024 lbs. | ||
 Datasheet | All Models |
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