Preliminary
EUP2520
Absolute Maximum Ratings
VIN ----------------------------------------------------------------------------- -0.3V to 6V
VO_MAIN ------------------------------------------------------------------------- -0.3V to 25V
VSW ------------------------------------------------------------------------------ -0.3V to VOUT+0.3V
Main_FB, Main_RTN, MAIN_EN, PWM & SUB_EN ----------------- -0.3V to 6V
Thermal Resistance
TDFN-12 (θ )---------------------------------------------------------------- 55°C /W
JA
Maximum Junction Temperature (TJ-MAX)---------------------------------- 150°C
Junction Temperature Rang (T )--------------------------------------------- -40°C to 125°C
J
Storage Temperature Range -------------------------------------------------- -65°C to 150°C
Lead Temperature (Soldering, 10sec.) -------------------------------------- 265°C
Recommended Operating Conditions
Supply Voltage, VIN ------------------------------------------------------------ 2.7V to 5.5V
Operating Temperature Rang (T )-------------------------------------------- -40°C to 85°C
A
Electrical Characteristics
VIN=3.6V, L=10uH, CIN=10uF, COUT=1uF, CSUB=4.7uF, RSUB1=100KΩ, RSUB2=6.6KΩ,TA=-40℃ to 85℃,
Unless otherwise noted. Typical Values are at TA=25℃.
EUP2520
Symbol
Parameter
Conditions
Unit
Min
Typ
Max.
0.3
Low
high
Enable
V
Threshold
0.95
MAIN_EN=3.6V
SUB_EN=3.6V
PWM=3.6V
3
3
3
5
5
5
IEN
Enable Pin Current
µA
Quiescent Current , Device Not MAIN_FB>0.5V
0.5
0.8
0.45
4.5
Switching (PWM mode)
SUB_FB>1V
Quiescent Current , Device Not
Switching (PFM mode)
mA
0.25
1.75
MAIN_EN=0V or
IQ
Quiescent Current , Device Not
SUB_EN=0V (open loop)
Switching
MAIN_EN=0V
1
2
µA
V
Power Off Current (Shutdown) SUB_EN=0V
PWM=0V
V =3.6V
0.455
1.18
0.5
1.23
10
50
0.7
0.5
3
0.545
1.28
Feedback Voltage (MAIN_FB)
Feedback Voltage (SUB_FB)
FB Pin Leakage Current
FB Pin Bias Current
IN
VFB
VIN=3.6V
MAIN_FB=0.5V
SUB_FB=0V
VMAIN_FB=0V,VIN=3.6V
ISW=300mA
IPMOS=20mA
nA
A
IB
0.5
0.9
ICurrent Limit
Switch Current Limit
Main_Switch RDS(ON), N1
PMOS Switch RDS(ON), P1
Main_RTN RDS(ON), N2
Ω
RDS(ON)
IMain_RTN=30mA
3
DS2520 Ver0.1 May. 2007
4
EUTECH [ EUTECH MICROELECTRONICS INC ]
