Converters. ETA3412 Datasheet

ETA3412 Datasheet PDF

Part ETA3412
Description Dual 1.5MHz 1.2A Step-Down Converters
Feature ETA3412; ETA3412 Dual 1.5MHz 1.2A Step-Down Converters in SOP8 Package DESCRIPTION The ETA3412 is a dual ch.
Manufacture ETA
Datasheet
Download ETA3412 Datasheet




ETA3412
ETA3412
Dual 1.5MHz 1.2A Step-Down Converters in SOP8 Package
DESCRIPTION
The ETA3412 is a dual channel high-efficiency, DC-to-DC
step-down switching regulator, capable of delivering up to
1.2A of output current for each channel. The devices
operate from an input voltage range of 2.6V to 6V and
provide output voltages from 0.6V to VIN, making the
ETA3412 ideal for low voltage power conversions. Running
at a fixed frequency of 1.5MHz allows the use of small
inductance value and low DCR inductors, thereby achieving
higher efficiencies. Other external components, such as
ceramic input and output caps, can also be small due to
higher switching frequency, while maintaining exceptional
low noise output voltages. Built-in EMI reduction circuitry
makes this converter ideal power supply for RF
applications. Internal soft-start control circuitry reduces
inrush current. Short-circuit and thermal-overload
protection improves design reliability.
ETA3412 is housed in a SOP8 package
FEATURES
Up to 1.2A Max Output Current
1.5MHz Frequency
Light Load operation
Internal Compensation
Available in SOP8
APPLICATIONS
USB ports/Hubs
Hot Swaps
Cellphones
Tablet PC
Set Top Boxes
ORDERING INFORMATION
PART PACKAGE PIN
ETA3412S8A SOP8
TOP MARK
ETA3412-Product Number
YWWPL-Date Code
TYPICAL APPLICATION
VIN1
2.6V to 6V
VIN2
2.6V to 6V
10uF
2 IN1 SW1 3
10uF
7 EN
1
FB1
ETA3412
2.2uH
100K 22pF Optional
50K
VOUT1
1.8V/1.2A
10uF
6 IN2
SW2 5 2.2uH
225K 22pF Optional
VOUT2
3.3V/1.2A
GND FB2 8
10uF
4 50K
Dual Step-Down Converter
100% Efficiency Vs IOUT
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
VOUT=1.8V
0.01
VIN=2.7V
VIN=3.6V
VIN=5V
0.1
IOUT (A)
1
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ETA3412
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 m
PMOS Switch On Resistance
ISW =200mA
200 m
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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