Details

---

BUY MAX890LESA-T https://www.utsource.net/itm/p/1185440.html
Single Peripheral Driver

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	2.7	-	5.5	V
Output Voltage	VOUT	Adjustable	0.8	-	5.0	V
Quiescent Current	IQ	VIN = 3.6V, No Load	-	1.5	-	μA
Shutdown Current	ISD	VIN = 3.6V, SHDN Low	-	0.01	-	μA
Load Regulation	ΔVOL	ILOAD = 1mA to 500mA	-	0.4	-	%
Line Regulation	ΔVOI	VIN = 2.7V to 5.5V	-	0.2	-	%
Dropout Voltage	VDROPOUT	ILOAD = 500mA	-	200	-	mV
PSRR (Power Supply Rejection Ratio)	PSRR	f = 1kHz	-	70	-	dB

Instructions for MAX890LESA-T:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the operating range of 2.7V to 5.5V.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted from 0.8V to 5.0V using external resistors. Follow the formula provided in the datasheet to set the desired output voltage.

3. Quiescent Current (IQ):

   • Monitor the quiescent current, especially under no-load conditions, to ensure efficient operation. Typically, it should not exceed 1.5μA at VIN = 3.6V.

4. Shutdown Mode:

   • To minimize power consumption, use the shutdown feature by pulling the SHDN pin low. This reduces the current draw to approximately 0.01μA.

5. Load and Line Regulation:

   • Maintain load regulation within 0.4% and line regulation within 0.2% for stable output voltage across varying loads and input voltages.

6. Dropout Voltage:

   • Keep the dropout voltage in mind when designing your circuit. It typically operates around 200mV at a load current of 500mA.

7. PSRR (Power Supply Rejection Ratio):

   • For noise-sensitive applications, consider the PSRR of 70dB at 1kHz to mitigate ripple and noise from the input supply.

8. Capacitor Selection:

   • Choose appropriate input and output capacitors as specified in the datasheet to ensure stability and performance.

9. PCB Layout:

   • Follow recommended PCB layout guidelines to minimize parasitic effects and ensure optimal performance.

(For reference only)