Details

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BUY PT5139-HT https://www.utsource.net/itm/p/12609135.html

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Input Voltage	V_IN	2.7	-	5.5	V	Operating range
Output Voltage	V_OUT	-	1.2	-	V	Fixed output voltage
Output Current	I_OUT	-	300	-	mA	Continuous output current
Quiescent Current	I_Q	-	60	-	渭A	Typical at no load
Dropout Voltage	V_DROPOUT	-	180	-	mV	At 300mA
Shutdown Current	I_SHDN	-	1	-	渭A	In shutdown mode
Operating Temperature	T_OP	-40	-	85	掳C	Junction temperature
Storage Temperature	T_STG	-65	-	150	掳C	Storage temperature range

Instructions:

1. Power Supply Connection:

   • Connect the input voltage (V_IN) to the VIN pin.
   • Ensure the input voltage is within the specified range (2.7V to 5.5V).

2. Output Configuration:

   • The output voltage (V_OUT) is fixed at 1.2V. No external resistors are required for voltage setting.

3. Capacitor Selection:

   • Use a 1渭F ceramic capacitor on the input side (VIN) for filtering.
   • Use a 1渭F ceramic capacitor on the output side (VOUT) for stability.

4. Shutdown Function:

   • Connect the SHDN pin to ground to enable the device.
   • Pull the SHDN pin high to put the device into shutdown mode, reducing the current draw to approximately 1渭A.

5. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high output currents or in high ambient temperatures.
   • The device can operate up to 85掳C junction temperature.

6. Layout Recommendations:

   • Place the input and output capacitors as close as possible to the respective pins to minimize parasitic inductance.
   • Use wide traces for power paths to reduce resistance and improve thermal performance.

7. Storage and Handling:

   • Store the device in a dry environment to prevent moisture damage.
   • Follow ESD (Electrostatic Discharge) precautions during handling to avoid damaging the device.

(For reference only)