EC3278 Datasheet, PDF (5/11 Pages) E-CMOS Corporation – 2.4A/32V Synchronous Rectified Step-Down Converter

2.4A/32V Synchronous Rectified
Step-Down Converter
EC3278
Electrical Characteristics
VIN = 12V, Ta = 25℃ unless otherwise specified.
Parameters
Symbol
Shutdown Supply Current
Supply Current
Feedback Voltage
VFB
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain *
AEA
Error Amplifier Trans-conductance GEA
High-Side Switch On Resistance * RDS(ON)1
Low-Side Switch On Resistance * RDS(ON)2
High-Side Switch Leakage
Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Trans-conductance
GCS
Oscillation Frequency
Short Circuit Oscillation
Frequency
Fosc1
Fosc2
Maximum Duty Cycle
DMAX
Minimum On Time *
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis
EN Lockout Threshold Voltage
EN Lockout Hysterisis
Test Condition
VEN = 0V
VEN = 2.0V; VFB =
1.0V
4.75V ≤ VIN ≤ 30V
∆IC = ±10µA
VEN = 0V, VSW = 0V
Minimum Duty Cycle
From Drain to Source
VFB = 0V
VFB = 1.0V
VEN Rising
Min.
0.900
1.1
2.2
Typ. Max.
1
3.0
1.3
1.5
0.923 0.946
1.1
400
800
90
90
10
2.9
1.1
4.8
200
100
90
220
1.5
2.0
210
2.5
2.7
210
Unit
µA
mA
V
V
V/V
µ A/V
mΩ
mΩ
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
V
mV
E-CMOS Corp. (www.ecmos.com.tw)
Page 5 of 11
3I13N-Rev.P001