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Hello, Please ask a question about LTC4449 Datasheet
# Example questions:
➢ What is the typical input voltage range for the ltc3774?
➢ What is the typical pgood trip level as a percentage of the set output voltage when vosns+ is ramping down?
➢ What is the maximum duty factor of the ltc3774 in dropout?
| Part No. | LTC4449 |
| Manufacturer | LINER |
| Size | 421 Kbytes |
| Pages | 38 pages |
| Description | Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing |
1. Product Information:
️· Product: LTC3774 (likely a power management IC - integrated circuit)
️· Package: 36-Lead (5mm x 6mm) Plastic QFN (Quad Flat No-Lead package)
️· Manufacturer: Linear Technology (now part of Analog Devices)
️· Temperature Range: -40°C to 125°C
️· Exposed Pad: Pin 37 is GND (ground) and *must* be soldered to the PCB (printed circuit board)
️· Website: [http://www.linear.com/product/LTC3774](http://www.linear.com/product/LTC3774)
️· Order Information Links: Provided within the document, including lead-free part marking and tape & reel specifications.
2. Electrical Characteristics (Key Parameters):
️· Input Voltage Range (VIN): 4.5 to 38 Volts
️· Output Voltage Range (VOUT): 0.6 to 3.5 Volts
️· Regulated Feedback Voltage (VOSNS+): 595.5 to 604.5 mV (at a specific condition)
️· Transconductance Amplifier (gm): 2 mmho
️· DA Unity-Gain Crossover Frequency (f0dB): 4 MHz
️· Feedback Overvoltage Lockout (VOVL): Various thresholds (% of output voltage)
️· Input DC Supply Current (IQ): Normal mode (~9 mA), Shutdown (~40 µA)
️· Maximum Duty Factor (DFMAX): 96% to 98%
️· Undervoltage Lockout (UVLO): 3.5 to 4.0 Volts
️· RUN Pin On Threshold (VRUN): 1.1 to 1.34 Volts
️· PGOOD Trip Level (VPGOOD): Various thresholds (% of output voltage)
️· PGOOD High to Low Delay (tPGOOD): 45µs
3. Pin Functions/Features (Implied from Parameters):
️· ITH: Likely related to compensation circuitry.
️· VOSNS+: Regulated feedback voltage.
️· VSNS+, VSNS–: Sense pins for current measurement.
️· RUN: Enable/shutdown pin.
️· PGOOD: Power good signal – indicates stable output voltage.
️· VITEMP: Temperature compensation input.
️· VRUN: Run pin voltage threshold.
4. Package Details:
️· Lead-free finish option available.
️· Tape and reel packaging is available with specific suffix codes.
Important Notes from the Document:
️· The exposed pad (Pin 37) *must* be soldered to ground for proper operation.
️· The temperature grade is identified by a label on the shipping container.
️· Consult LTC Marketing for parts with wider operating temperature ranges.
1. Product Information:
️· Product: LTC3774 (likely a power management IC - integrated circuit)
️· Package: 36-Lead (5mm x 6mm) Plastic QFN (Quad Flat No-Lead package)
️· Manufacturer: Linear Technology (now part of Analog Devices)
️· Temperature Range: -40°C to 125°C
️· Exposed Pad: Pin 37 is GND (ground) and *must* be soldered to the PCB (printed circuit board)
️· Website: [http://www.linear.com/product/LTC3774](http://www.linear.com/product/LTC3774)
️· Order Information Links: Provided within the document, including lead-free part marking and tape & reel specifications.
2. Electrical Characteristics (Key Parameters):
️· Input Voltage Range (VIN): 4.5 to 38 Volts
️· Output Voltage Range (VOUT): 0.6 to 3.5 Volts
️· Regulated Feedback Voltage (VOSNS+): 595.5 to 604.5 mV (at a specific condition)
️· Transconductance Amplifier (gm): 2 mmho
️· DA Unity-Gain Crossover Frequency (f0dB): 4 MHz
️· Feedback Overvoltage Lockout (VOVL): Various thresholds (% of output voltage)
️· Input DC Supply Current (IQ): Normal mode (~9 mA), Shutdown (~40 µA)
️· Maximum Duty Factor (DFMAX): 96% to 98%
️· Undervoltage Lockout (UVLO): 3.5 to 4.0 Volts
️· RUN Pin On Threshold (VRUN): 1.1 to 1.34 Volts
️· PGOOD Trip Level (VPGOOD): Various thresholds (% of output voltage)
️· PGOOD High to Low Delay (tPGOOD): 45µs
3. Pin Functions/Features (Implied from Parameters):
️· ITH: Likely related to compensation circuitry.
️· VOSNS+: Regulated feedback voltage.
️· VSNS+, VSNS–: Sense pins for current measurement.
️· RUN: Enable/shutdown pin.
️· PGOOD: Power good signal – indicates stable output voltage.
️· VITEMP: Temperature compensation input.
️· VRUN: Run pin voltage threshold.
4. Package Details:
️· Lead-free finish option available.
️· Tape and reel packaging is available with specific suffix codes.
Important Notes from the Document:
️· The exposed pad (Pin 37) *must* be soldered to ground for proper operation.
️· The temperature grade is identified by a label on the shipping container.
️· Consult LTC Marketing for parts with wider operating temperature ranges.
| Part No. | LTC4449 |
| Manufacturer | LINER |
| Size | 421 Kbytes |
| Pages | 38 pages |
| Description | Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing |
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