Step-Up Converter. ETA1036 Datasheet

ETA1036 Converter. Datasheet pdf. Equivalent

Part ETA1036
Description Synchronous Step-Up Converter
Feature ETA1036 3W, 0.85V Startup Voltage, Synchronous Step-Up Converter with Real-Shutdown and Short-Circu.
Manufacture ETA
Datasheet
Download ETA1036 Datasheet

ETA1036 3W, 0.85V Startup Voltage, Synchronous Step-Up Conv ETA1036 Datasheet
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ETA1036
ETA1036
3W, 0.85V Startup Voltage, Synchronous Step-Up Converter with
Real-Shutdown and Short-Circuit Protection in SOT23-5
DESCRIPTION
FEATURES
The ETA1036 is a high efficiency synchronous step-up
converter that can provide up to 3W of power to a boosted
output from a low voltage source. Unlike most step-up
converter, not only it starts up at a very low input voltage
as low as 0.85V, it also incorporates circuits that
disconnect the input from output, during shutdown,
short-circuit, output current overloading, or other events
when output is higher than the input. This eliminates the
need for an external MOSFET and its control circuitry to
disconnect the input from output, and provides robust
output overload protection. The ETA1036 starts up from a
voltage as low as 0.85V making it ideal for applications with
single-cell or two-cell alkaline, NiCd, and NiMh batteries. A
switching frequency of 2MHz minimizes solution footprint
by allowing the use of tiny and low profile inductors and
ceramic capacitors. An internal synchronous MOSFET
provides highest efficiency and with a current mode
control that is internally compensated, external parts
count is reduced to minimal. ETA1036 is available in
three output voltage options. They are 2.1V, 3.3V and 5V. It
is housed in a tiny SOT23-5 package.
Output Disconnect
Short-circuit Protection
3W Output Power
Output to Input Reversed Current Protection
0.85V Low Start-up Voltage
VIN range from 0.6V to 4.5V
Up to 96% Efficiency
40μA No load IQ and light load PFM Mode
Internal Synchronous Rectifier
Current Mode control
Logic Control Shutdown and Thermal shutdown
SOT23-5 Package
APPLICATIONS
USB OTG for MIDs, Smartphones
Mobile back-up Battery Chargers
Alkaline, NiCd, and NiMh batteries applications
USB powered devices
ORDERING INFORMATION
PART #
Output Voltage
ETA1036-50S2F-T 5.0V
ETA1036-33S2F-T 3.3V
ETA1036-21S2F-T 2.1V
TOP MARK
CPYW
DzYW
DaYW
TYPICAL APPLICATION
6.8μH 2.2nF *Needed if Vout=5V
45
IN SW
VOUT
4.7μF
OUT 1
3 EN ETA1036
2.1,3.3V, 5V
6.3V
22μFx2
GND
2
100% Efficiency Vs IOUT
80%
60%
40%
20%
VOUT=3.3V
0%
0.01
0.1
IOUT (A)
VIN=3V
VIN=2.4V
VIN=1.8V
VIN=1.2V
1
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ETA1036
ETA1036
PIN CONFIGURATION
OUT 1
GND 2
EN 3
ETA1036
SOT23-5
5 SW
4 IN
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute
maximum rating conditions for long periods may affect device reliability.)
SW Voltage........................................................-0.3V to 5.5V
All Other PIN Voltages……………………………..–0.3V to 5V
SW to ground current ………….…….……….......Internally limited
Operating Temperature Range ……................…–40°C to 85°C
Storage Temperature Range ………………..….–55°C to 150°C
Thermal Resistance
θJA θJC
SOT23-5……………………………………………..220…….…110 ........oC/W
ELECTRICAL CHACRACTERISTICS
(VIN = 1.8V, VOUT = 3.3V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Input Voltage
0.6 V
Startup Voltage
IOUT=0A
0.85 1.1
2.1
V
Output Voltage
VIN =1.8
3.3 V
5.0
Quiescent Current at IN
No Switching
40 μA
Shutdown Supply Current at IN
Switching Frequency
Maximum Duty Cycle
VEN=GND
VIN<4.3V
0.5 5 μA
1.2 2 2.4 MHz
90 %
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Switch Current Limit
ISW =100mA
ISW =100mA
0.15 0.35
0.15 0.35
1.2 1.5
A
Start-up Current Limit
0.5 A
Output to Input Reverse Leakage Current
SW Leakage Current
EN Input Current
VEN=GND, Measure at IN pin
VOUT=5V,VSW=0 or 5V, VEN=GND
0.1 5 μA
10 μA
0.1 1 μA
EN Input Low Voltage
0.3 V
EN Input High Voltage
0.6 V
Thermal Shutdown
Rising, Hysteresis=10°C
165 °C
PIN DESCRIPTION
PIN # NAME
1 OUT
2 GND
3 EN
4 IN
5 SW
DESCRIPTION
Output pin. Bypass with a 22μF or larger ceramic capacitor closely between this pin and GND
Ground Pin
Enable pin for the IC. Drive this pin high to enable the part, low to disable.
Input Supply Voltage. Bypass with a 4.7μF ceramic capacitor to GND
Inductor Connection. Connect an inductor Between SW and the regulator output
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