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BUY RT7258GSP https://www.utsource.net/itm/p/12600282.html

Below is the parameter table and instructions for the RT7258GSP, a low dropout linear regulator (LDO) from Richtek Technology Corporation.

RT7258GSP Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Condition
Input Voltage	VIN	1.6	-	40	V
Output Voltage	VOUT	1.2	-	18	V	Fixed: 3.3V, 5V; Adjustable
Output Current	IOUT	-	1.5	3.0	A
Dropout Voltage	VD	-	250	600	mV	IOUT = 1.5A
Quiescent Current	IQ	-	1.0	2.0	mA	VOUT = 3.3V, IOUT = 0mA
Shutdown Current	ISD	-	0.1	1.0	渭A	VIN = 12V, EN = Low
Line Regulation	-	-	0.02	-	%/V	VIN = 2.7V to 20V, IOUT = 500mA
Load Regulation	-	-	0.1	-	%/A	VIN = 5V, IOUT = 0 to 1.5A
PSRR (Power Supply Rejection Ratio)	-	-	60	-	dB	f = 1kHz, VIN = 12V, IOUT = 100mA
Operating Temperature	TOPR	-40	-	125	掳C	Storage Temperature: -65 to 150掳C
Storage Temperature	TSTG	-65	-	150	掳C
Package	-	-	-	-	SOT-223

Instructions for RT7258GSP

1. Pin Configuration:

   • VIN (Pin 1): Input Voltage
   • GND (Pin 2): Ground
   • VOUT (Pin 3): Output Voltage
   • EN (Pin 4): Enable

2. Basic Circuit Connection:

   • Connect the input voltage (VIN) to the power supply.
   • Connect the ground (GND) to the system ground.
   • Connect the output voltage (VOUT) to the load.
   • Connect the enable pin (EN) to a high level (e.g., 3.3V or 5V) to turn on the regulator, or to a low level (e.g., GND) to turn it off.

3. Capacitor Selection:

   • Input Capacitor (CIN): Use a ceramic capacitor with a minimum capacitance of 1渭F and an X5R or X7R dielectric. Place it as close as possible to the VIN and GND pins.
   • Output Capacitor (COUT): Use a ceramic capacitor with a minimum capacitance of 1渭F and an X5R or X7R dielectric. Place it as close as possible to the VOUT and GND pins.

4. Thermal Considerations:

   • Ensure adequate heat dissipation by providing a good thermal path to the PCB. The SOT-223 package has a thermal resistance (胃JA) of approximately 35掳C/W.
   • For high current applications, consider using a heatsink or a larger copper area on the PCB.

5. Adjustable Output Voltage:

   • To set an adjustable output voltage, use the following formula: [ V_ = V_ left(1 + fracright) ]
   • Where ( V_ ) is the reference voltage (1.2V), ( R_1 ) is the resistor connected between VOUT and the feedback pin (FB), and ( R_2 ) is the resistor connected between FB and GND.

6. Enable Pin (EN):

   • The enable pin can be used to control the operation of the regulator. When EN is high, the regulator is active. When EN is low, the regulator is in shutdown mode, and the quiescent current is reduced to the shutdown current level.

7. Protection Features:

   • The RT7258GSP includes over-temperature protection (OTP) and over-current protection (OCP) to prevent damage under fault conditions.

8. Application Notes:

   • For detailed application notes and further information, refer to the datasheet provided by Richtek Technology Corporation.

By following these instructions, you can effectively integrate the RT7258GSP into your design and ensure optimal performance.

(For reference only)