Details

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BUY LT3599IFE#PBF https://www.utsource.net/itm/p/11712912.html
IC LED DRIVER RGLTR DIM 28TSSOP

Parameter	Description	Min	Typical	Max	Unit
VIN	Input Voltage	2.8	-	5.5	V
IOUT	Output Current	-	1.5	-	A
VOUT	Output Voltage	0.4	-	3.3	V
FSW	Switching Frequency	600	-	2000	kHz
IQ	Quiescent Current	10	-	-	μA
PSRR	Power Supply Rejection Ratio	-	70	-	dB (at 100 kHz)
VUVLO	Under-Voltage Lockout Threshold	2.3	-	-	V
VFB	Feedback Voltage	0.6	-	-	V
Tj	Junction Temperature	-40	-	125	°C
Package	Package Type	-	-	-	16-lead SSOP

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.8V to 5.5V.
   • Use appropriate decoupling capacitors to stabilize the input voltage.

2. Output Current (IOUT):

   • The device can provide up to 1.5A of output current.
   • Ensure the external components (inductor, diode) are rated for the required current.

3. Output Voltage (VOUT):

   • Set the output voltage using the feedback resistor network.
   • The output voltage can be adjusted from 0.4V to 3.3V.

4. Switching Frequency (FSW):

   • The switching frequency can be set by an external resistor.
   • Typical range is 600kHz to 2000kHz.

5. Quiescent Current (IQ):

   • The quiescent current is typically 10μA, which helps in achieving high efficiency at light loads.

6. Power Supply Rejection Ratio (PSRR):

   • The device has a typical PSRR of 70dB at 100kHz, which helps in reducing output ripple.

7. Under-Voltage Lockout (VUVLO):

   • The device will not operate if the input voltage falls below 2.3V.

8. Feedback Voltage (VFB):

   • The internal reference voltage for the feedback pin is 0.6V.

9. Junction Temperature (Tj):

   • Ensure the junction temperature does not exceed 125°C to avoid thermal shutdown or damage.

10. Package:

    • The device is available in a 16-lead SSOP package.
    • Follow proper handling and soldering guidelines to prevent damage.

Layout Considerations:

• Place the input and output capacitors as close as possible to the respective pins.
• Use wide traces for power paths to minimize resistance and inductance.
• Keep the ground plane solid and continuous to reduce noise and improve stability.

Troubleshooting:

• No Output: Check the input voltage and ensure it is above the UVLO threshold.
• High Output Ripple: Verify the output capacitor and inductor values, and check for proper PCB layout.
• Overheating: Ensure adequate heat dissipation and check the load current and efficiency.

(For reference only)