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PDF FAN5665 Data sheet ( Hoja de datos )

Número de pieza FAN5665
Descripción Adaptive Charge Pump 5V Boost
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! FAN5665 Hoja de datos, Descripción, Manual

February 2008
FAN5665www.datasheet4u.com
High-Efficiency, Adaptive Charge Pump 5V Boost
Features
ƒ 5V Fixed Output Voltage
ƒ 30mA Maximum Output Current
ƒ Built-in Charge Pump with Three Modes of
Operation: 1×, 1.5×, and 2×
ƒ Minimum External Components
ƒ Flying Capacitors Only 0.22µF
ƒ Low-noise, Constant-frequency Operation (1.2MHz)
at Heavy Loads
ƒ High-efficiency, Low-frequency Operation at Light
Loads
ƒ Low Quiescent Current
ƒ Up to 92% Efficiency
ƒ 2.9V to 5.5V Input Voltage Range
ƒ Soft-start for Limiting Inrush Current
ƒ Input Under-Voltage Lockout Protection (UVLO)
ƒ Short-Circuit Protection (SCP)
ƒ Thermal Shutdown Protection (TSD)
ƒ 8-bump 1.21 x 1.21mm, 0.4mm Pitch WLCSP
Applications
ƒ USB I/O Supply Regulators
ƒ Cell Phones, Smart-Phones
ƒ Pocket PCs
ƒ PDA, DSC, PMP, and MP3 Players
Description
The FAN5665 is a 5V switched capacitor step-up
DC/DC converter with an input voltage range from 2.9V
to 5.5V. Switch reconfiguration and fractional switching
techniques are utilized to achieve high efficiency over
the entire input voltage range.
The FAN5665 includes built-in under-voltage lockout,
short circuit, and thermal protection circuitry.
The FAN5665 is available in an 8-bump 0.4mm pitch
WLCSP package.
C1
0.22µF
C1 -
GND
EN
C1 +
VIN
+5V
COUT
2.2µF
VOUT
C2+
C2-
C2
0.22µF
+2.9 to 5.5V
CIN
2.2µF
Figure 1. Typical Application
Ordering Information
Part Number Operating Temperature Range
Package
FAN5665UCX
-40°C to +85°C
8-Lead Wafer-Level Chip-Scale
Package (WLCSP), 1.21x1.21mm
All packages are lead free per JEDEC: J-STD-020B standard.
Packing Method
Tape and Reel
© 2007 Fairchild Semiconductor Corporation
FAN5665 • Rev. 1.0.1
www.fairchildsemi.com

1 page




FAN5665 pdf
Typical Performance Characteristics
Unless otherwise noted, CIN = 2.2µF, COUT = 2.2µF, C1 = C2 = 0.22µF, TA = 25°C.
50.5
50.0
www.datasheet4u.com
49.5
IOUT=2mA
49.0
48.5
48.0
47.5
2.9
3.4 3.9 4.4
Input Voltage (V)
4.9
Figure 3. Light-Load Switching Frequency
vs. Input Voltage
1.2163
1.2042
IOUT=20mA
1.1921
1.1800
2.9
3.4 3.9 4.4
Input Voltage (V)
4.9
Figure 4. Heavy-Load Switching Frequency
vs. Input Voltage
80
70 VIN=3.6V, IOUT=2mA
60
50
40
30
20
10
0
-40 -15 10
35
Temperature (°C)
60
85
Figure 5. Light-Load Switching Frequency
vs. Temperature
1.34
1.32
VIN=3.6V, IOUT=20mA
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
-40 -15 10
35
Temperature (°C)
60
85
Figure 6. Heavy-Load Switching Frequency
vs. Temperature
250
200
IOUT=0mA
150
100
50
0
2.9
3.4 3.9 4.4 4.9
Input Voltage (V)
5.4
Figure 7. Quiescent Current vs. Input Voltage
300
250 IOUT= 0mA
200
150
100
50
0
-40 -15
VIN=3.6V
VIN=5.5V
10 35
Temperature (°C)
60
85
Figure 8. Quiescent Current vs. Temperature
© 2007 Fairchild Semiconductor Corporation
FAN5665 • Rev. 1.0.1
5
www.fairchildsemi.com

5 Page





FAN5665 arduino
Block Diagram
www.datasheet4u.com
Figure 39. Block Diagram
Functional Description
Overview
FAN5665 is a 5V switched capacitor regulator with very
low output ripple and high efficiency. The maximum
output current is 30mA.
Linear Regulation Loop
The linear regulation loop (consisting of the power
transistors, output feedback, and error amplifier), is
used to regulate the output voltage and reduce current
spikes at mode change.
Soft-start
At power-up, the device has 0.5ms soft-start to control
the inrush current and make the output ramp up slowly.
Modes of Operation
FAN5665 has 1×, 1.5×, and 2× modes. Input voltage is
compared with reference to determine mode.
Light / Heavy Load Monitor
In 1.5× / 2× mode, there is a current sense to detect the
output current. If a light-load condition is detected, the
device switches to a lower switching frequency around
50kHz. This frequency is a good compromise between
achieving high light-load efficiency and not causing
audible noise generation. If the load is heavy (typically
more than 5mA), the device switches at 1.2MHz to
decrease the output voltage ripple.
Protection
FAN5665 has thermal shutdown protection when the
die temperature is more than 150°C. It turns back off
when the temperature falls by about 10°C.
Short-circuit protection helps avoid damage to the
device when the output is shorted to ground. Whenever
output voltage is pulled below 150mV, short-circuit
protection is triggered and limits the input current. If
VOUT>150mV, protection is in the form of thermal
shutdown if die temperature exceeds 150°C.
© 2007 Fairchild Semiconductor Corporation
FAN5665 • Rev. 1.0.1
11
www.fairchildsemi.com

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