ETA3452 Step-Down Converter Datasheet

ETA3452 Datasheet, PDF, Equivalent


Part Number

ETA3452

Description

Adaptive COT Step-Down Converter

Manufacture

ETA

Total Page 3 Pages
Datasheet
Download ETA3452 Datasheet


ETA3452
ETA3452
6V/3A, Fast Response, Adaptive COT Step-Down Converter in SOT23-6
DESCRIPTION
ETA3452 belongs to a new breed of high frequency
synchronous Step-Down converters that combines the
advantages of voltage mode control and Constant-On-Time
control. Its adaptive Constant-On-Time control dynamically
changes switch on time to achieve a constant switching
frequency. It does not have the minimum on-time constrain
normally a fixed-frequency current mode Step-down
requires, allowing it to go down to very low duty ratio without
affecting loop stability. The voltage mode nature of ETA3452
also provides more superior load transient response and a
seamless transition from PFM to PWM modes. ETA3452 is
capable of supplying output with current up to 3A at 1.2V
output. All these features make ETA3452 an excellent choice
for ARM based CPU power supply.
ETA3452 is in a SOT23-6 package.
FEATURES
Adaptive COT control
Up to 95% Efficiency
Up to 91% Efficiency for low output voltage
Up to 3A Max Output current
Feedback voltage 0.45V
Excellent load transient response
SOT23-6 Package
APPLICATIONS
ARM based CPUs
Tablet, MID
Smart Phone
Smart Set-Top Box, OTT
ORDERING INFORMATION
PART
ETA3452S2G
PACKAGE PIN
SOT23-6
TOP MARK
FLYW
FL: Product Code
YW: Date Code
TYPICAL APPLICATION
VIN 2.6V to 5.5V
22uF
VIN SW
EN ETA3452 VOS
FB
GND
1uH
VOUT 1.2V
400K 100pF
240K
22uF
Typical Application Circuit of 1.2V Output
www.etasolution.com
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ETA3452
ETA3452
PIN CONFIGURATION
ABSOLUTEMAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating
conditions for long periods may affect device reliability.)
VIN Voltage ..................................................................0.3V to 6.0V
All Other Pin Voltage ....................................VIN0.3V to VIN+0.3
SW to ground current……………………..…………...Internally limited
Operating Temperature Range …………………....…–40°C to 85°C
Storage Temperature Range ……..……….………….–55°C to 150°C
Thermal Resistance
JC JA
SOT23-6………………………..…………….100…………...190….......... °C/W
ELECTRICAL CHACRACTERISTICS
(VIN = 3.6V, unless otherwise specified. Typical values are at TA = 25oC.)
PARAMETER
CONDITIONS
Input Voltage Range
Input UVLO
Rising, Hysteresis=250mV
Input OVP
Rising, Hysteresis=200mV
Input Supply Current
Input Shutdown Current
VFB =0.5V, Device Not Switching
EN=GND
FB Feedback Voltage
FB Input Current
Output Voltage Range
Load Regulation
Line Regulation
Switching Frequency
VIN =5V, IOUT =0 to 3A
VIN =3V to 4.2V, IOUT =1A
PMOS Switch On Resistance
NMOS Switch On Resistance
PMOS Switch Current Limit
ISW =200mA
ISW =200mA
Vin=5V
SW Leakage Current
EN Input Current
VIN=5.5V,VSW=0 or 5.5V,EN=GND
EN Input Low Voltage
EN Input High Voltage
Thermal Shutdown
Rising, Hysteresis =20°C
MIN TYP MAX UNITS
2.6 5.5 V
2.15 V
6.25 V
50 μA
0.1 1 μA
0.441 0.45 0.459
V
0.01 μA
0.45 VIN V
0.67 %/A
0.29 %/V
1.0 1.5 2.0 MHz
120 mΩ
60 mΩ
4 4.5
A
10 μA
1 μA
0.4 V
1.5 V
155 °C
www.etasolution.com
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Features ETA3452 6V/3A, Fast Response, Adaptive C OT Step-Down Converter in SOT23-6 DESC RIPTION ETA3452 belongs to a new breed of high frequency synchronous Step-Down converters that combines the advantage s of voltage mode control and Constant- On-Time control. Its adaptive Constant- On-Time control dynamically changes swi tch on time to achieve a constant switc hing frequency. It does not have the mi nimum on-time constrain normally a fixe d-frequency current mode Step-down requ ires, allowing it to go down to very lo w duty ratio without affecting loop sta bility. The voltage mode nature of ETA3 452 also provides more superior load tr ansient response and a seamless transit ion from PFM to PWM modes. ETA3452 is c apable of supplying output with current up to 3A at 1.2V output. All these fea tures make ETA3452 an excellent choice for ARM based CPU power supply. ETA3452 is in a SOT23-6 package. FEATURES  Adaptive COT control  Up to 95% Eff iciency  Up to 91% Efficiency for low output voltage  Up to 3A Ma.
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