Details

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BUY TPS650250RHBR https://www.utsource.net/itm/p/5314740.html
Power Management IC for Li-Ion Powered Systems

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	VIN	2.7	-	5.5	V	Operating input voltage range
Output Voltage	VOUT	-	1.8	-	V	Adjustable output voltage (set by external resistors)
Quiescent Current	IQ	-	60	-	μA	Supply current with no load
Shutdown Current	ISD	-	0.1	-	μA	Supply current in shutdown mode
Load Regulation	-	-	0.4	-	%	Output voltage change over load current
Line Regulation	-	-	0.1	-	%/V	Output voltage change over input voltage
Dropout Voltage	VDROPOUT	-	250	-	mV	Maximum dropout voltage at full load
Switching Frequency	fSW	-	1.5	-	MHz	Internal oscillator frequency
Efficiency	η	-	90	-	%	Typical efficiency at rated load

Instructions for TPS650250RHBR:

1. Power Supply Connection:

   • Connect the input voltage (VIN) to a power supply within the operating range of 2.7V to 5.5V.
   • Ensure proper bypass capacitors are placed close to the VIN and GND pins for stability.

2. Output Voltage Configuration:

   • Set the desired output voltage using external resistors connected to the FB pin according to the formula provided in the datasheet.
   • Ensure the output capacitor is stable and meets the recommended ESR value.

3. Shutdown Operation:

   • To put the device into shutdown mode, pull the EN pin low. This reduces the supply current to approximately 0.1 μA.
   • To resume operation, bring the EN pin high again.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if operating near maximum load conditions.
   • Use a heatsink or thermal pad as necessary based on the application's thermal requirements.

5. Layout Guidelines:

   • Keep the layout compact and minimize trace lengths between the IC and critical components like capacitors and inductors.
   • Follow the recommended PCB layout guidelines provided in the datasheet for optimal performance.

6. Protection Features:

   • The device includes internal protection features such as thermal shutdown and current limiting.
   • Verify that these protections are sufficient for your application's needs.

Refer to the specific datasheet for detailed formulas and exact component values needed for your design.

(For reference only)