ACT4065
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device
reliability.)
PARAMETER
IN Supply Voltage
SW Voltage
BS Voltage
EN, FB, COMP Voltage
Continuous SW Current
Maximum Power Dissipation
Junction to Ambient Thermal Resistance (θ
JA
)
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
VALUE
-0.3 to 30
-1 to V
IN
+ 1
V
SW
– 0.3 to V
SW
+ 8
-0.3 to 6
Internally limited
0.76
105
-40 to 150
-55 to 150
300
UNIT
V
V
V
V
A
W
°C/W
°C
°C
°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, T
J
= 25°C unless otherwise specified.)
PARAMETER
Input Voltage
Feedback Voltage
High-Side Switch On Resistance
Low-Side Switch On Resistance
SW Leakage
Current Limit
COMP to Current Limit
Transconductance
Error Amplifier Transconductance
Error Amplifier DC Gain
Switching Frequency
Short Circuit Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Enable Threshold Voltage
Enable Pull Up Current
Supply Current in Shutdown
IC Supply Current in Operation
Thermal Shutdown Temperature
SYMBOL
TEST CONDITIONS
V
IN
V
OUT
= 5V, I
LOAD
= 1A
V
FB
V
COMP
= 1.5V
R
ONH
R
ONL
V
EN
= 0
I
LIM
G
COMP
G
EA
A
VEA
f
SW
D
MAX
ΔI
COMP
= ±10µA
MIN
6
1.267
TYP
1.293
0.2
8
0
3.5
1.8
550
4000
200
50
93
1
1
8
0.7
160
MAX
28
1.319
10
3
UNIT
V
V
Ω
Ω
µA
A
A/V
µA/V
V/V
kHz
kHz
%
%
V
µA
160
V
FB
= 0
V
FB
= 1.1V
V
FB
= 1.4V
Hysteresis = 0.1V
Pin pulled up to 4.5V typically when
left unconnected
V
EN
= 0
V
EN
= 3V, V
FB
= 1.4V
Hysteresis = 10°C
240
0.7
0
1.3
20
µA
mA
°C
Active-Semi, Inc.
-3-
www.active-semi.com
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
