ETA3499 Buck Converter Datasheet

ETA3499 Datasheet, PDF, Equivalent


Part Number

ETA3499

Description

1MHz Synchronous Buck Converter

Manufacture

ETA

Total Page 3 Pages
Datasheet
Download ETA3499 Datasheet


ETA3499
ETA3499
3A, 1MHz Synchronous Buck Converter with 7.3V OVP
DESCRIPTION
The ETA3499 is a high-efficiency, DC-to-DC step-down
switching regulator, capable of delivering up to 3A of
output current. The devices operate from an input voltage
range of 2.4V to 7.3V and provide output voltages from
0.6V to VIN, making the ETA3499 ideal for low voltage
power conversions. Running at a fixed frequency of 1MHz
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. Internal soft-start control circuitry reduces
inrush current. Short-circuit and thermal-overload
protection improves design reliability.
ETA3499 is housed in a tiny SOT23-6L package
FEATURES
Wide Input Voltage Range: 2.4 7.3V
Standby Current 42uA (Vout=1.2V, Iout=0A)
Up to 96% Efficiency
Up to 3A Max Output Current
1MHz Frequency
Light Load operation
Internal Compensation
Tiny SOT23-6L Package
APPLICATIONS
Set-Top-Box
IP camera
Telecom Devices
TYPICAL APPLICATION
ORDERING INFORMATION
PART No.
ETA3499S2G
PACKAGE
SOT23-6
TOP MARK
BHYW
Pcs/Reel
3000
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ETA3499
ETA3499
PIN CONFIGURATION
SOT23-6
ABSOLUTEMAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating
conditions for long periods may affect device reliability.)
IN, SW, FB, EN Voltage....................................................0.3V to 9V
SW to ground current .......................................;............................4A
Maximum Power Dissipation………………….………….………….400mW
Operating Temperature Range ………………….....…–40°C to 85°C
Storage Temperature Range ………………….……….–55°C to 150°C
Thermal Resistance
JC JA
SOT23-6L………………………………….…110……………….220 …...... °C/W
Lead Temperature (Soldering, 10ssec) ……….…….………….260°C
ESD HBM (Human Body Mode) …………….…………..……..………….2KV
ESD MM (Machine Mode) ……………………..……………..…………….200V
ELECTRICAL CHACRACTERISTICS
(VIN = 5V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
2.4 7.3 V
Input UVLO
Rising, Hysteresis=490mV
2.2 2.4 2.6 V
Input Supply Current
VFB =0.65V
42 86 μA
Input Shutdown Current
1 μA
FB Feedback Voltage
VIN =3.6V
0.588 0.6 0.612
V
FB Input Current
1 μA
Output Voltage Range
0.9 VIN V
Load Regulation
Iload =0.2A to 1A
0.1 %/A
Line Regulation
VIN =2.7 to 5.5V@ Iload=1A
0.06 %/V
Switching Frequency
1 MHz
NMOS Switch On Resistance
ISW =200mA
140 mΩ
PMOS Switch On Resistance
ISW =200mA
70 mΩ
PMOS Switch Current Limit
4A
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
Power Good Threshold
Rising, Hysteresis=6%
90 %
Power Good Low level
I(SINK)=1mA
0.4 V
Thermal Shutdown
Rising, Hysteresis =30°C
160 °C
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Features ETA3499 3A, 1MHz Synchronous Buck Conve rter with 7.3V OVP DESCRIPTION The ETA 3499 is a high-efficiency, DC-to-DC ste p-down switching regulator, capable of delivering up to 3A of output current. The devices operate from an input volta ge range of 2.4V to 7.3V and provide ou tput voltages from 0.6V to VIN, making the ETA3499 ideal for low voltage power conversions. Running at a fixed freque ncy of 1MHz allows the use of small ind uctance value and low DCR inductors, th ereby achieving higher efficiencies. Ot her external components, such as cerami c input and output caps, can also be sm all due to higher switching frequency, while maintaining exceptional low noise output voltages. Internal soft-start c ontrol circuitry reduces inrush current . Short-circuit and thermal-overload pr otection improves design reliability. E TA3499 is housed in a tiny SOT23-6L pac kage FEATURES  Wide Input Voltage R ange: 2.4 – 7.3V  Standby Current 42uA (Vout=1.2V, Iout=0A)  Up to 96% Efficiency  Up to 3A Max Outpu.
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