EC3284 Datasheet, PDF (4/11 Pages) E-CMOS Corporation – 3A, 23V, Synchronous Rectified Step-Down Converter

3A, 23V, Synchronous Rectified
Step-Down Converter
EC3284
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Supply Voltage
Switch Node Voltage
Boost Voltage
Output Voltage
All other pin
V_IN
~0.3 to 23
V
V_SW
21
V
V_BS
V_SW-0.3V to V_SW+6V
V
Vout
0.923V~20V
V
-0.3V to 6V
V
Operating Junction Temperature
T_J
150
°C
Operating Temperature Range
Storage Temperature
Lead Temperature(Soldering,10sec)
ESD
HBM(Human Body Mode)
MSL
Thermal Resistance-Junction to Ambient
Thermal Resistance-Junction to Case
T_A
T_STG
T_LED
Rθ _JA
Rθ _Jc
-40~85
-65 to +150
260
2K
Level3
50
10
℃
°C
°C
V
℃/W
℃/W
Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
ELECTRICAL CHARACTERISTICS
(V_IN=12V,TA=25°C, Unless otherwise specified)
Parameter
Symbol
Shutdown supply current
Supply Current
Feedback Voltage
V_FB
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain*
AEA
Error Amplifier Transconductance
GEA
Hide-Side Switch On Resistance*
Low-Side Switch On Resistance*
High-Side Switch Leakage Current
R_DS(ON)1
R_DS(ON)2
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense Transconductance GCS
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
F_OSC1
F_OSC2
DMAX
Minimum On Time*
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage Hysteresis
EN Lockout Threshold Voltage
EN Lockout Hysteresis
Input Under Voltage Lockout Threshold
Input Under Voltage Lockout Threshold
Hysteresis
Soft-Start Current
Soft-Start period
Thermal Shutdown
Test Conditions
V_EN=0V
V_EN=2.0V,V_FB=1.0V
4.75V<V_IN<23V
△IC=±10uA
V_EN=0V,V_SW=0V
Minimum Duty Cycle
From Drain to Source
V_FB=0V
V_FB=1.0V
VEN rising
V_IN rising
V_SS=0V
C_SS=0.1uF
Min
---
---
0.900
---
---
---
---
---
---
4.0
---
---
---
---
---
---
1.1
---
2.2
---
3.80
---
---
---
---
Typ
1
1.3
0.923
1.1
400
800
90
90
---
5.8
0.9
4.8
340
100
90
220
1.5
210
2.5
210
4.10
210
6
15
160
Max
3.0
1.5
0.946
---
---
---
---
---
10
---
---
---
---
---
---
---
2.0
---
2.7
---
4.40
---
---
---
---
Unit
uA
mA
V
V/V
uA/V
mΩ
mΩ
uA
A
A
A/V
kHZ
kHZ
%
ns
V
mV
V
mV
V
mV
uA
ms
℃
E-CMOS Corp. (www.ecmos.com.tw)
Page 4 of 11
3H09N-Rev.F003