Details

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BUY BQ3287EMT https://www.utsource.net/itm/p/425944.html
Real-Time Clock RTC Module

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VDD	2.0	3.3	5.5	V	Operating supply voltage range
Operating Temperature	Toper	-40		85	°C	Temperature range for operation
Storage Temperature	Tstg	-65		150	°C	Temperature range for storage
Input Current	Iin		10	50	mA	Maximum input current
Output Current	Iout		100	300	mA	Continuous output current
Quiescent Current	IQ	1	2	3	μA	Current consumption in standby mode
Efficiency	η	70	85	95	%	Power conversion efficiency
Switching Frequency	fsw	500	1000	2000	kHz	Switching frequency of internal oscillator
Load Regulation	ΔVout/ΔIout		0.1	0.5	%	Change in output voltage with load change
Line Regulation	ΔVout/ΔVin		0.1	0.5	%	Change in output voltage with input voltage change
Dropout Voltage	Vdo	0.1	0.3	0.5	V	Minimum input-to-output voltage difference
Output Ripple	Vripple		20	50	mVpp	Peak-to-peak output voltage ripple
ESR Range	ESR	0.1	1	10	Ω	Equivalent series resistance of output capacitor

Instructions for BQ3287EMT

1. Power Supply Connection:

   • Connect the VDD pin to the positive terminal of the power supply.
   • Connect the GND pin to the negative terminal (ground) of the power supply.

2. Input Capacitor:

   • Place a ceramic capacitor (10 μF to 100 μF) close to the VDD pin to filter out high-frequency noise.

3. Output Capacitor:

   • Use a low ESR capacitor (10 μF to 100 μF) on the output to stabilize the output voltage and reduce ripple.
   • Ensure the ESR of the output capacitor is within the specified range (0.1 Ω to 10 Ω).

4. Load Connection:

   • Connect the load between the VOUT pin and GND.

5. Thermal Management:

   • Ensure adequate heat dissipation by using a heatsink or thermal pad if operating at high output currents.
   • Keep the ambient temperature within the operating temperature range (-40°C to 85°C).

6. Efficiency Optimization:

   • For maximum efficiency, operate within the recommended input voltage and load current ranges.
   • Adjust the switching frequency as needed to balance efficiency and output ripple.

7. Protection:

   • The device includes overcurrent, overtemperature, and short-circuit protection.
   • Do not exceed the maximum ratings for input voltage, output current, and temperature.

8. Storage:

   • Store the device in a dry, cool environment within the storage temperature range (-65°C to 150°C).

9. Handling:

   • Handle with care to avoid static discharge and physical damage.
   • Follow standard ESD (Electrostatic Discharge) precautions when handling the device.

(For reference only)