ETA3412
PIN CONFIGURATION
FB1 FB2
IN1
ETA3412
SW1
EN
IN2
GND SW2
ABSOLUTEMAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum
rating conditions for long periods may affect device reliability.)
IN, SW1, SW2, FB1, FB2, EN Voltage...........................–0.3V to 7V
SW1, SW2 to ground current ………….…….…..Internally limited
Maximum Power Dissipation…………………..………………….400mW
Operating Temperature Range …….................…–40°C to 85°C
Storage Temperature Range ……………………….–55°C to 150°
ELECTRICAL CHACRACTERISTICS for each channel
(VIN = 3.6V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
2.6 6 V
Input UVLO
Rising, Hysteresis=100mV
2.5 V
Input Supply Current
VFB =0.65V
38 μA
Input Shutdown Current
1 μA
FB Feedback Voltage
VIN =2.5 to 5V
0.588 0.6 0.612 V
FB Input Current
0.01 μA
Output Voltage Range
0.6 VIN V
Load Regulation
VOUT =1.8V, IOUT From 0.2A to 0.4A
0.1
%
Line Regulation
VIN =2.7 to 5.5V
0.04 %/V
Switching Frequency
1.5 MHz
NMOS Switch On Resistance
ISW =200mA
280 mΩ
PMOS Switch On Resistance
ISW =200mA
200 mΩ
PMOS Switch Current Limit
1.5 A
SW Leakage Current
VIN=5.5V,VSW=0 or 5.5V,EN= GND
10 μA
EN Input Current
1 μA
EN Input Low Voltage
0.4 V
EN Input High Voltage
1.5 V
PIN DESCRIPTION
PIN # NAME
1, 8 FB1, FB2
2, 6 IN1, IN2
3, 5 SW1, SW2
4 GND
7 EN
DESCRIPTION
Feedback Input. Connect an external resistor divider from the output to FB and GND to set the
output to a voltage between 0.6V and VIN
Supply Voltage. Bypass with a 10μF ceramic capacitor to GND
Inductor Connection. Connect an inductor Between SW and the regulator output.
Ground
Enable pin for the IC. Drive this pin to high to enable the part, low to disable.
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