ACT4060
Rev8, 24-Jul-07
ABSOLUTE MAXIMUM RATINGS
PARAMETER
IN Supply Voltage
SW Voltage
BS Voltage
EN, FB, COMP Voltage
Continuous SW Current
Junction to Ambient Thermal Resistance (θ
JA
)
Maximum Power Dissipation
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
VALUE
-0.3 to 25
-1 to V
IN
+ 1
V
SW
- 0.3 to V
SW
+ 8
-0.3 to 6
Internally Limited
105
0.76
-40 to 150
-55 to 150
300
UNIT
V
V
V
V
A
°C/W
W
°C
°C
°C
:
Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may
affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, T
A
= 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
V
IN
V
FB
R
ONH
R
ONL
TEST CONDITIONS
V
OUT
= 5V, I
LOAD
= 0A to 1A
4.75V
≤ V
IN
≤ 20V, V
COMP
= 1.5V
MIN
7
1.267
TYP
MAX
20
UNIT
V
V
Ω
Ω
1.293
0.20
4.7
1.319
V
EN
= 0
I
LIM
G
COMP
G
EA
A
VEA
f
SW
V
FB
= 0
D
MAX
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
0.7
350
ΔI
COMP
= ±10µA
2.4
0
2.85
1.8
550
4000
420
50
90
10
µA
A
A/V
µA/V
V/V
490
kHz
kHz
%
0
1
2
8
0.7
160
20
1.3
%
V
µA
µA
mA
°C
Innovative Products.
Active Solutions.
-3-
Copyright © 2006 Active-Semi, Inc.
ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
