Details

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BUY ADM690AARNZ https://www.utsource.net/itm/p/837505.html
µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.65V Threshold Voltage, Active Low Reset; Package: SOIC; No of Pins: 8; Temperature Range: Commercial

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Supply Voltage	VDD	2.7	-	5.5	V
Output Voltage	VOUT	-	1.24	-	V	Fixed
Quiescent Current	IQ	-	20	-	μA
Output Current	IOUT	-	100	-	mA
Dropout Voltage	VDROPOUT	-	300	-	mV	@ IOUT = 100mA, VDD = 3.3V
Load Regulation	-	-	0.2	-	%	1mA to 100mA
Line Regulation	-	-	0.2	-	%	Over full input range
PSRR (Power Supply Rejection Ratio)	-	-	60	-	dB	@ 1kHz
Operating Temperature	TJ	-40	-	125	°C
Storage Temperature	TSTG	-65	-	150	°C

Instructions for Use:

1. Supply Voltage (VDD):

   • The ADM690AARNZ operates within a supply voltage range of 2.7V to 5.5V. Ensure that the input voltage is within this range to avoid damage to the device.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 1.24V. This is suitable for applications requiring a stable 1.24V supply.

3. Quiescent Current (IQ):

   • The quiescent current is typically 20μA, which is relatively low, making the device suitable for battery-powered applications.

4. Output Current (IOUT):

   • The device can provide up to 100mA of output current. Ensure that the load does not exceed this limit to prevent overheating or damage.

5. Dropout Voltage:

   • The dropout voltage is typically 300mV at an output current of 100mA and an input voltage of 3.3V. This means the input voltage should be at least 300mV higher than the output voltage to ensure proper regulation.

6. Load Regulation:

   • The load regulation is 0.2%, indicating that the output voltage will change by only 0.2% when the load current varies from 1mA to 100mA.

7. Line Regulation:

   • The line regulation is also 0.2%, meaning the output voltage will change by only 0.2% over the full input voltage range.

8. PSRR (Power Supply Rejection Ratio):

   • The PSRR is 60dB at 1kHz, indicating good rejection of ripple and noise from the input power supply.

9. Operating Temperature (TJ):

   • The device is designed to operate over a temperature range of -40°C to 125°C. Ensure that the operating environment does not exceed these limits.

10. Storage Temperature (TSTG):

    • The storage temperature range is -65°C to 150°C. Store the device in an environment that does not exceed these temperatures to maintain its reliability.

Additional Considerations:

• Capacitors:
  • Use appropriate input and output capacitors to ensure stability and filter out noise. Typical values are 1μF ceramic capacitors for both input and output.
• PCB Layout:
  • Ensure a clean PCB layout with short traces and proper grounding to minimize noise and improve performance.
• Thermal Management:
  • If the device is expected to operate at high currents or in high ambient temperatures, consider thermal management techniques such as heat sinks or increased airflow.

(For reference only)