DUAL CHANNEL1.5 MHZ, 600MA SYNCHRONOUS STEP-DOWN CONVERTER
FSP3112
ABSOLUTE MAXIMUM RATINGS
(NOTE 1)
Parameter
Rating
Unit
Input Supply Voltage
-0.3 to +6
V
RUN1, RUN2
-0.3 to V
IN
+0.3
V
VFB1, VFB2 Voltages
-0.3 to V
IN
+0.3
V
SW1, SW2 Voltages
-0.3 to V
IN
+0.3
V
POR Voltages
-0.3 to +6
V
Peak SW1,SW2 Sink and Source Current
1.5
A
-40 to +85
Operating Temperature Range
℃
+125
Junction Temperature (Note 2)
℃
-65 to 150
Storage Temperature Range
℃
+300
Lead Temperature (soldering, 10 sec.)
℃
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: T
J
is calculated from the ambient temperature T
A
and power dissipation P
D
according to the following formula:
T
J
=T
A
+P
D
×θ
JA
ELECTRICAL CHARACTERISTICS (NOTE 3)
(V
IN
=V
RUN
=3.6V, T
A
=25℃, Test circuit of Figure 1, Unless otherwise noted)
Parameter
Input Voltage Range
Input DC Supply Current
Active Mode
Shutdown Mode
Regulated Feedback Voltage
Feedback Pin Input Current
Reference Voltage Line Regulation
Output Voltage Line Regulation
Output Voltage Load Regulation
Maximum Output Current
Oscillator Frequency
R
DS(ON)
of P-CH MOSFET
R
DS(ON)
of N-CH MOSFET
Peak Inductor Current
SW Leakage
RUN Threshold
RUN Leakage Current
Condition
V
FB1
=V
FB2
=0.5V,
RUN=0V, V
IN
=4.2V
T
A
=+25℃, Channel 1 or 2
T
A
=0℃≤T
A
≤85℃,
Channel 1 or 2
T
A
=-40℃≤T
A
≤85℃,
Channel 1 or 2
V
FB
=0.65V
V
IN
=2.5V to 5.5V
V
IN
=2.5V to 5.5V, V
OUT
=1.8V,
I
OUT
=10mA
V
IN
=3.6V, I
OUT
=0 to 600mA,
V
IN
=3.0V
V
FB 1/2
= 0.6V
I
SW
=300mA
I
SW
=-300mA
V
IN
=3V,V
FB1
=V
FB2
=0.5V,
Duty cycle＜35%
V
RUN
=0V, V
SW
=0V or 5V, V
IN
=5V
-40℃≤T
A
≤85℃
Min.
2.5
Typ.
500
0.3
0.5880
0.5865
0.5850
0.6000
0.6000
0.6000
0.11
0.11
0.0015
600
1.2
1.5
0.35
0.28
1.2
1.8
0.45
0.45
Max.
5.5
800
2
0.6120
0.6135
0.6150
±30
0.40
0.40
Unit
V
µA
V
V
V
nA
%/V
%/V
%/mA
mA
MHz
Ω
Ω
A
µA
±0.01
±1
0.3
0.45
1.50
V
µA
±0.1
±1
V
FBX
Ramping Up
8.5
%
V
FBX
Ramping Down,
-8.5
%
Power-On Reset Threshold (POR)
Power-On Reset Delay
175
mS
Power-On Reset On-Resistance
100
Ω
Note 3: 100% production test at +25℃. Specifications over the temperature range are guaranteed by design and
characterization.
THERMAL RESISTANCE
(NOTE 4)
Package
θ
JA
(℃/W)
MSOP-10 (EXPOSE PAD)
45
DFN-10 (EXPOSE PAD)
45
Note 4: Thermal Resistance is specified with approximately 1 square of 1 oz cooper.
3/10
θ
JC
(℃/W)
10
10
2007-7-11
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