SYNCHRONOUS BOOST DC/DC CONVERTER
FSP3602
FEATURES
Up to 96% Efficiency
Low voltage start-up：0.9V
Shut-down current: < 1µA
Input voltage：0.6V½4.4V
Output voltage
：
2.5V
½
4.3V (Up to 5V with
Schottky)
Low switch on resistance R
DS(ON)
,
Internal switch: 0.35Ω
1.4MHz fixed frequency switching
High switch on current: 1A
Short-Circuit protection
Low profile SOT23-6L package
GENERAL DESCRIPTION
The FSP3602 is high efficiency synchronous, step-up
DC/DC converters optimized to provide a high efficient
solution to medium power systems. The devices work
under the input voltage between 0.6V and 4.4V with a
1.4MHz fixed frequency switching. These features
minimizes overall solution footprint by allowing the use
of tiny, low profile inductors and ceramic capacitors.
The FSP3602 is capable of supplying an output voltage
between 2.5V and 4.3V, the internal synchronous
switch is desired to provide high efficiency without
Schottky.
The devices also featured providing 180mA from a
single AA cell input or 400mA from a 2-cell AA with a
3V/3.3V output.
The FSP3602 converter is available in the industry
standard SOT23-6L power packages (or upon
request).
APPLICATIONS
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handsets and DSL modems
PC cards
Portable media player
PIN CONFIGURATION
(Top View)
VIN
VOUT
EN
6
5
4
1
SW
2
GND
3
FB
Pin Number
1
2
3
4
5
6
Pin Name
SW
GND
FB
EN
VOUT
VIN
Pin Function
Switch Output
Ground
Feedback
ON/OFF Control(High Enable)
Output
Input
1/5
2007-12-31
SYNCHRONOUS BOOST DC/DC CONVERTER
BLOCK DIAGRAM
FSP3602
ABSOLUTE MAXIMUM RATINGS
Parameter
Power Dissipation
V
IN
V
OUT
V
SW
V
EN
Operating Temperature Range
Lead Temperature (Soldering 10 sec.)
Storage Temperature Range
Rating
Internally limited
0.6 ~ 4.4
2.5 ~ 5
0.6 ~ 5
1.0 ~ 4.4
- 30 ~ +85
+ 300
- 65 ~ +125
Unit
W
V
V
V
V
℃
℃
℃
2/5
2007-12-31
SYNCHRONOUS BOOST DC/DC CONVERTER
FSP3602
ELECTRICAL CHARACTERISTICS (NOTE 4)
(V
IN
= 1.2V, V
OUT
= 3.3V, T
A
=25℃, Unless otherwise noted)
Parameter
Output Voltage Range (Adj.)
Minimum Start-Up Voltage
Minimum Operating Voltage
Switching Frequency
Max Duty Cycle
Current Limit Delay to Output
Feedback Voltage
Feedback Input Current
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
NMOS Current Limit
Quiescent Current (Active)
Shutdown Current
En Input High
En Input Low
En Input Current
V
EN
= 5.5V
0.01
V
EN
=0V, Not Including Switch Leakage
1
0.35
1
700
V
FB
= 1.25V
V
SW
= 5V
1.165
V
FB
= 1.15V
I
LOAD
= 1mA
EN = V
IN
1.1
80
Condition
Min.
2.5
0.9
0.5
1.4
87
40
1.203
1
0.1
0.1
0.35
0.45
950
300
0.01
500
1
5
5
1.241
Typ.
Max.
5
1.1
0.65
1.7
Unit
V
V
V
MHz
%
ns
V
nA
µA
µA
Ω
Ω
mA
µA
µA
V
V
µA
TYPICAL APPLICATION CIRCUIT
3/5
2007-12-31
京公网安备 11010802033920号
EEWORLD
