Details

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Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage Range	VIN	Continuous Operation	4.5	-	28	V
Switching Frequency	fSW	Internal Oscillator	300	-	1000	kHz
Output Voltage Range	VOUT	Adjustable	0.6	-	5.5	V
Quiescent Current	IQ	VIN = 12V, No Load	-	60	-	μA
Maximum Duty Cycle	DMAX	-	-	97	-	%
Minimum ON Time	tON(MIN)	-	-	50	-	ns
Minimum OFF Time	tOFF(MIN)	-	-	50	-	ns
Current Limit	ILIM	-	-	40	-	A
Reference Voltage	VREF	-	-	0.6	-	V

Instructions for Use

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 28V for continuous operation.

2. Output Voltage (VOUT):

   • Adjust the output voltage using external resistors connected to the FB pin. The output voltage can be set between 0.6V and 5.5V.

3. Switching Frequency (fSW):

   • Set the switching frequency by selecting an appropriate resistor value for RT. The internal oscillator can operate from 300kHz to 1MHz.

4. Current Limit:

   • The current limit is set internally at approximately 40A. Ensure your application does not exceed this limit to prevent damage.

5. Quiescent Current:

   • The quiescent current is typically 60μA when no load is present and the input voltage is 12V.

6. Duty Cycle:

   • The maximum duty cycle is 97%, allowing for efficient power conversion even at lower input voltages.

7. Minimum ON/OFF Times:

   • Both minimum ON and OFF times are 50ns, which should be considered when designing the circuit to avoid instability.

8. Reference Voltage:

   • The reference voltage is fixed at 0.6V, used in conjunction with feedback resistors to set the output voltage.

For detailed design considerations and specific applications, refer to the datasheet or application notes provided by Linear Technology (now part of Analog Devices).

(For reference only)