EUP2561
Absolute Maximum Ratings
IN to GND -------------------------------------------------------------------------- -0.3V to 6V
PGND to GND ---------------------------------------------------------------------- -0.3V to 0.3V
LX,OUT to GND ------------------------------------------------------------------- -0.3V to 30V
CTRL to GND -------------------------------------- -0.3V to the lower of 6V or (V
IN
+0.5V)
COMP,CS to GND ---------------------------------------------------------- -0.3V to (V
IN
+0.3V)
I
LX
------------------------------------------------------------------------------------- 1A
Thermal Resistance
DFN-8 -------------------------------------------------------------------------------- 50°C /W
Junction Temperature ---------------------------------------------------------------- 150°C
Storage Temperature Range ------------------------------------------------------ -65°C to 150°C
Lead Temperature (Soldering, 10sec.) --------------------------------------------- 260°C
Recommended Operating Conditions
Supply Voltage, V
IN
---------------------------------------------------------------- 2.6V to 5.5V
Operating Temperature Rang ----------------------------------------------------- -40°C to 85°C
Electrical Characteristics
(V
IN
= 3V, V
OUT
= 20V, C
OUT
= 0.1µF, C
COMP
= 0.15µF, R
SENSE
= 7.5Ω, V
CTRL
= 1.5V, Figure 2,
TA =-40°C to +85°C,
unless otherwise noted.)
Parameter
Supply Voltage
UVLO Threshold
Quiescent Current
OVLO Threshold
OUT Input Bias Current
Output Voltage Range
ERROR AMPLIFIER
CTRL to CS Regulation
CTRL Input Resistance
CTRL Dual-Mode
Threshold
CTRL Shutdown Enable
Delay
CS-to-COMP
Transconductance
OSCILLATOR
Operating Frequency
Maximum Duty Cycle
N-CHANNEL SWITCH
LX On-Resistance
LX Current Limit
Conditions
V
IN
rising or falling
No Switching
V
OUT
rising
V
OUT
=26V,V
CTRL
> 0.24V
V
OUT
=V
IN
, CTRL=GND
EUP2561
Min
Typ
Max.
2.6
2.20
26
12
(V
IN
-V
D1
)
2.40
0.39
27.5
22
0.01
5.5
2.60
0.60
29
35
1
25.5
0.100
400
180
7.5
0.105
700
260
Unit
V
V
mA
V
µA
V
V
kΩ
mV
mS
V
CTRL
= 1V, V
IN
= 2.6V to 5.5V
V
CTRL
≤
1.0V
Rising
0.095
200
100
Vcomp=1.0V
21
0.78
52
1.05
92
1.6
85
1.3
96
2.4
1000
µS
MHz
%
Ω
mA
CTRL=IN CS=GND
88
Duty cycle=90%
550
750
DS2561 Ver1.0
Dec. 2006
4
EUTECH [ EUTECH MICROELECTRONICS INC ]
