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PDF FAN5602MP45X Data sheet ( Hoja de datos )

Número de pieza FAN5602MP45X
Descripción Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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www.fairchildsemi.com
FAN5602
Universal (Step-Up/Step-Down) Charge Pump
Regulated DC/DC Converter
Features
• Low Noise Constant Frequency Operation at Heavy Load
• High Efficiency Pulse-Skip (PFM) Operation at Light
Load
• Adaptive Seven Switch Configurations (1:3, 1:2, 2:3, 1:1,
3:2, 2:1, 3:1)
• 92% Peak Efficiency
• Input Voltage Range: 2.7V to 5.5V
• Output Current:3.3V, 200mA at VIN = 3.6V
• ±3% Output Voltage Accuracy
• ICC < 1µA in Shutdown Mode
• 1MHz Operating Frequency
• Shutdown Isolates Output from Input
• Soft-Start Limits Inrush Current at Start-up
• Short Circuit and Over Temperature Protection
• Minimum External Component Count
• No Inductors
Applications
• Cell Phones
• Handheld Computers
• Portable RF Communication Equipment
• Core Supply to Low Power Processors
• Low Voltage DC Bus
• DSP Supplies
Description
The FAN5602 is a universal switched capacitor DC/DC con-
verter capable of step-up or step-down operation. Due to its
unique adaptive fractional switching topology, the device
achieves high efficiency over a wider input/output voltage
range than any of its predecessors. The FAN5602 utilizes
resistance modulated loop control, which produces lower
switching noise than other topologies. Depending upon
actual load conditions, the device automatically switches
between constant frequency and pulse skipping (PFM)
modes of operation in order to extend battery life. The
FAN5602 produces a fixed regulated output within the range
of 2.7V to 5.5V from any type of voltage source. High effi-
ciency is achieved under any input/output voltage conditions
because an internal logic circuitry automatically reconfigures
the system to the best possible topology. Only two 1µF
bucket capacitors and one 10µF output capacitor are needed.
During power on soft start circuitry prevents excessive cur-
rent drawn from the supply. The device is protected against
short circuit and over temperature conditions.
The FAN5602 is available with 3.3V, 4.5V, and 5.0V output
voltage. Any other output voltage option within the 1.5V to
5V range is available upon request. The FAN5602 is avail-
able in 8-lead MSOP and 3x3mm 8-lead MLP packages
Typical Application
Input 2.7V to 5.5V
VIN
1
CIN
C2+
2
CB
3
C2-
GND 4
8
6
FAN5602
7
5
ENABLE
C1+
VOUT
COUT
C1-
REV. 1.1 10/7/04

1 page




FAN5602MP45X pdf
PRODUCT SPECIFICATION
Typical Performance Characteristics
TA = 25°C, VOUT = 4.5V unless otherwise noted.
Quiescent Current vs Input Voltage
180
160
140
120
100
80
60
40
20
0
1.5 2.5 3.5 4.5 5.5
Input Voltage (V)
Line Regulation
4.55
4.50
4.45
ILOAD = 100mA
Vout = 4.5V
4.40
4.35
4.30
2.0
2.5
3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
6.0
FAN5602
Shutdown Current vs Input Voltage
80
70
60
50
40
30
20
10
0
1234 5
Input Voltage (V)
6
100
90
80
70
60
50
40
30
20
2.500
Efficiency vs Input Voltage
Load Current = 10mA
Load Current = 50mA
Load Current = 100mA
Load Current = 150mA
3.000
3.500 4.000 4.500
Input Voltage
5.000 5.500
4.6
4.5
4.4
4.3
4.2
4.1
4.0
1
Load Regulation
Vin = 3.6V
50 100 150 200 250 300 350
Load Currrent (mA)
Output Current Capability vs Input Voltage
700.0
600.0
500.0
400.0
VOUT < 10%
VOUT < 3%
300.0
200.0
100.0
0.0
2 2.5 3 3.5 4 4.5 5
Input Voltage (V)
REV. 1.1 10/7/04
5

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FAN5602MP45X arduino
PRODUCT SPECIFICATION
Switch Array
FAN5602
TOP
S1A C1+
S2A
MID
GND
C1-
C1
Figure. 1a
Mode1(1:1)
TOP
TOP
C1+ S1A
S1A
C1+
S2A MID
C1
S3A
C1- S5
S3B
S4B
C2
C1-
GND
Figure. 1b
Mode2 (2:3 or 3:2):
All Switches set for phase 1
and reverse state for phase 2
TOP
C1+ S1A
S1B
S2A S2B
C1 MID
S3A S3B
C1- S4A
S4B
C2+
C2
C2-
C1+ S1A
S2A
C1
MID
C1- S4A
S5
S2B
S3B
S4B
C2+
C2-
C2
Figure. 1c
Mode3 (1:2 or 2:1):
All Switches set for phase 1
and reverse state for phase 2
GND
Figure. 1d
Mode4 (1:3 or 3:1):
All Switches set for phase 1
and reverse state for phase 2
Switch Configurations
The FAN5602 has seven built-in switch configurations
including 1:1, 3:2, 2:1 and 3:1 for step-down and 2:3, 1:2
and 1:3 for step-up.
When 1.5 x VOUT > VIN > VOUT, 1:1 mode shown in Fig.
1(a) is used. In this mode the internal oscillator is turned off.
The power transistors connecting the input and the output
become pass transistors and their gate voltages are controlled
by the linear regulation loop, the rest of power transistors are
turned off. In this mode the FAN5602 operates exactly like a
low dropout (LDO) regulator and the ripple of the output is
in the micro-volt range.
When 1.5 x VOUT > VIN > VOUT, 2:3 mode (step-up) shown
in Fig. 1(b) is used. In the charging phase two flying capaci-
tors are placed in series and each capacitor is charged to a
half of the input voltage. In pumping phase the flying capac-
itors are placed in parallel. The input is connected to the bot-
tom the capacitors so that the top of the capacitors is boosted
to a voltage equals VIN/2 + VIN, i.e., 3/2 x VIN. By connect-
ing the top of the capacitors to the output, one can ideally
charge the output to 3/2 x VIN. If 3/2 x VIN is higher than the
needed VOUT, the linear regulation loop will adjust the on-
resistance to drop some voltage. Boosting the voltage of the
top of the capacitors to 3/2 x VIN by connecting VIN the bot-
tom of the capacitors boosts the power efficiency 3/2 times.
In 2:3 mode the ideal power efficiency is VOUT/1.5 x VIN
(For example, if VIN = 2V, VOUT = 2 x VIN = 4V, the ideal
power efficiency is 100%).
REV. 1.1 10/7/04
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