Specifications
SKU: 11575174
Parameter | Symbol | Min | Typ | Max | Unit | Conditions / Notes |
---|---|---|---|---|---|---|
Input Voltage | VIN | 3 | - | 42 | V | Continuous operation |
Output Voltage Range | VOUT | 0.985 | - | 18 | V | Adjustable |
Output Current | IOUT | - | - | 4 | A | Continuous output current |
Switching Frequency | fSW | 300 | - | 2200 | kHz | Adjustable |
Quiescent Current | IQ | - | 2.5 | - | μA | No load, VIN = 12V, VOUT = 5V |
Shutdown Current | ISD | - | 0.1 | - | μA | VIN = 12V |
Efficiency | η | - | 94 | - | % | VIN = 12V, VOUT = 5V, IOUT = 1A |
Load Transient Response | ΔVOUT | - | ±20 | - | mV | 0A to 1A step, VIN = 12V, VOUT = 5V |
Line Transient Response | ΔVOUT | - | ±20 | - | mV | VIN step from 5V to 12V, VOUT = 5V |
Thermal Shutdown | TSD | - | 160 | - | °C | Typical, hysteresis = 15°C |
Operating Temperature | TOPR | -40 | - | 125 | °C | Junction temperature range |
Storage Temperature | TSTG | -65 | - | 150 | °C | Storage temperature range |
Package | - | - | - | 3mm × 3mm DFN-10 (Exposing Pad) | - |
Instructions for Use:
Input Capacitor Selection:
- Use a ceramic capacitor with low ESR and X7R dielectric.
- Recommended value: 10μF to 100μF.
Output Capacitor Selection:
- Use a ceramic capacitor with low ESR and X7R or X5R dielectric.
- Recommended value: 10μF to 22μF for stable operation.
Inductor Selection:
- Choose an inductor with a saturation current greater than the maximum output current.
- Recommended inductance: 1.5μH to 4.7μH.
Feedback Resistor Network:
- Set the output voltage using the feedback resistor network.
- Use the formula: ( V_ = 0.985 times left(1 + fracright) ).
Thermal Management:
- Ensure proper heat dissipation by mounting the device on a PCB with a large copper area.
- Use the exposed pad for thermal grounding.
Layout Considerations:
- Keep the input and output capacitors close to the IC.
- Minimize loop area for high-frequency currents to reduce EMI.
Enable Pin:
- The enable pin can be used to control the on/off state of the regulator.
- Apply a logic high (VIN) to turn on the regulator and a logic low (GND) to turn it off.
Soft-Start:
- The soft-start feature reduces inrush current during startup.
- The typical soft-start time is 1ms.
Overcurrent Protection:
- The device has built-in overcurrent protection that limits the output current to prevent damage.
- The protection threshold is typically set to 4.2A.
Thermal Shutdown:
- The device will shut down if the junction temperature exceeds 160°C.
- It will restart once the temperature drops below 145°C due to the hysteresis.
Storage and Handling:
- Store the device in a dry, cool environment.
- Follow standard ESD handling procedures to avoid damage.
For more detailed information, refer to the datasheet provided by Analog Devices.
(For reference only)Inquiry - LT8614EUDC