Details

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BUY MIC4427BN https://www.utsource.net/itm/p/12535395.html

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Input Voltage	VIN	Continuous	2.7	-	5.5	V
Output Voltage	VOUT	Adjustable, Set by External Resistor Divider	-	-	-	V
Output Current	IOUT	Continuous	-	1.0	1.5	A
Quiescent Current	IQ	VIN = 3V, No Load	-	2.2	-	μA
Dropout Voltage	VDROPOUT	IOUT = 1.0A, VIN = 3.3V	-	0.4	-	V
Shutdown Current	ISD	VIN = 3V, SHDN = 0V	-	0.1	-	μA
Thermal Shutdown	TSD	-	-	160	-	°C
Operating Junction Temperature	TJ	-	-20	-	125	°C
Storage Temperature	TSTG	-	-40	-	150	°C

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.7V to 5.5V.
   • The device is designed to operate efficiently within this range.

2. Output Voltage (VOUT):

   • The output voltage is adjustable and can be set using an external resistor divider.
   • Connect the feedback pin (FB) to the output through a resistor (R1) and ground through another resistor (R2).
   • Use the formula: VOUT = 1.25 * (1 + R1/R2) to calculate the desired output voltage.

3. Output Current (IOUT):

   • The device can provide a continuous output current of up to 1.5A, with a typical value of 1.0A.
   • Ensure that the load does not exceed these limits to avoid damage.

4. Quiescent Current (IQ):

   • The quiescent current is typically 2.2μA at 3V input with no load.
   • This low quiescent current helps in reducing power consumption in battery-operated applications.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is typically 0.4V when the output current is 1.0A and the input voltage is 3.3V.
   • This low dropout voltage allows the regulator to maintain regulation even when the input voltage is close to the output voltage.

6. Shutdown Current (ISD):

   • When the shutdown pin (SHDN) is pulled low (0V), the device enters a low-power shutdown mode.
   • The shutdown current is typically 0.1μA at 3V input.

7. Thermal Shutdown (TSD):

   • The device has built-in thermal protection that activates at approximately 160°C.
   • This feature helps prevent damage due to excessive heat.

8. Operating Junction Temperature (TJ):

   • The operating junction temperature range is from -20°C to 125°C.
   • Ensure that the device operates within this temperature range to avoid performance degradation or damage.

9. Storage Temperature (TSTG):

   • The storage temperature range is from -40°C to 150°C.
   • Store the device in a dry environment within this temperature range to ensure long-term reliability.

Layout Considerations:

• Place the input and output capacitors as close as possible to the device to minimize noise and improve stability.
• Use a low ESR capacitor for the output to reduce ripple and improve transient response.
• Ensure proper heat sinking if the device is expected to dissipate significant power.

(For reference only)