Specifications
SKU: 11650479
Parameter | Symbol | Conditions | Min | Typical | Max | Unit |
---|---|---|---|---|---|---|
Input Voltage Range | VIN | Continuous Operation | 4.5 | - | 60 | V |
Output Voltage Range | VOUT | Adjustable | 1.225 | - | 60 | V |
Quiescent Current | IQ | VOUT = 5V, No Load | - | 80 | - | μA |
Shutdown Current | ISD | VIN = 12V, SHDN Low | - | 1 | - | μA |
Maximum Switch Current | ISW(MAX) | Continuous Operation | - | 1.5 | - | A |
Minimum On-Time | tON(MIN) | - | - | 1.1 | - | μs |
Operating Frequency | fSW | - | - | 1.1 | 2.2 | MHz |
Efficiency | η | VIN = 12V, VOUT = 5V, IOUT = 1A | - | 85 | - | % |
Output Voltage Accuracy | ΔVOUT | VOUT = 5V, 25°C to 85°C | - | ±1 | - | % |
Thermal Shutdown Temperature | TSD | - | - | 160 | - | °C |
Instructions for Use:
Input Voltage (VIN):
- Ensure the input voltage is within the range of 4.5V to 60V.
- Use appropriate input filtering and decoupling capacitors to stabilize the input voltage.
Output Voltage (VOUT):
- The output voltage can be adjusted using external resistors.
- Use the formula: VOUT = 1.225 * (1 + R1/R2) where R1 and R2 are the resistor values.
Quiescent Current (IQ):
- The quiescent current is typically 80 μA at no load.
- This value helps in calculating the overall efficiency of the converter.
Shutdown Mode:
- To enter shutdown mode, pull the SHDN pin low.
- The shutdown current is typically 1 μA.
Switch Current (ISW(MAX)):
- The maximum switch current is 1.5A.
- Ensure the inductor and other components can handle this current.
Minimum On-Time (tON(MIN)):
- The minimum on-time is 1.1 μs.
- This affects the duty cycle and should be considered when designing the output filter.
Operating Frequency (fSW):
- The operating frequency can be set between 1.1 MHz and 2.2 MHz.
- Higher frequencies reduce the size of external components but may increase switching losses.
Efficiency (η):
- The typical efficiency is 85% at VIN = 12V, VOUT = 5V, and IOUT = 1A.
- Optimize the design to achieve the best efficiency.
Output Voltage Accuracy (ΔVOUT):
- The output voltage accuracy is ±1% over the temperature range from 25°C to 85°C.
- Ensure the feedback network is stable and well-designed.
Thermal Management:
- The device will shut down if the temperature exceeds 160°C.
- Use proper heat sinking or cooling methods to keep the device within safe operating temperatures.
Inquiry - LTC1735CS-1