fitipower integrated technology lnc.
FP6770
Low Noise, DC/DC
Charge Pump Regulator
Description
The FP6770 is a low noise DC/DC charge pump
regulator that produces a regulated output voltage
from 2.7V to 4.5V input voltage. Low external parts
count (one flying capacitor and two small bypass
capacitors at V
IN
and V
OUT
) make the FP6770 ideal
for small, battery-powered applications.
The FP6770 operates as a constant frequency mode
switched capacitor voltage doubler to produce a
regulated output and reduces both output and input
ripple. The FP6770 has both short circuit protection
and thermal shutdown capability.
The FP6770 is available in space-saving SOT-23-6
TSOT-23-6 and TDFN-6 packages.
Features
●
Low Noise Constant Frequency Operation
●
Output Current: Minimum 170mA at V
IN
=3.2V
●
Available in SOT-23-6
、TSOT-23-6
and TDFN-6
●
2MHz Switching Frequency
●
Fixed 5V ± 4% Output
●
V
IN
Range: 2.7V to 4.5V
●
No Inductors
●
Low Shutdown Current: <1μA
Applications
●
White LEDs Backlighting
●
Li-Ion Battery Backup Supplies
●
Smart Card Readers
●
Local 3V to 5V Conversion
●
PCMCIA Local 5V Supplies
Pin Assignments
S6 Package (SOT-23-6)
Ordering Information
FP6770
□□□
TR: Tape / Reel
P: Green
G: Green
Package Type
S6: SOT-23-6
S9: TSOT-23-6
WD: TDFN-6(1.6x1.6mm)
C-
S9 Package (TSOT-23-6)
C+ VIN
6
1
4
5
(Marking)
2
3
SOT-23-6 Marking
Part Number
FP6770S6P
Product Code
C2
VOUT GND SHDN
TSOT-23-6 Marking
Part Number
FP6770S9P
Product Code
C0
WD Package (TDFN- 6) (1.6x1.6mm)
TDFN-6(1.6x1.6mm) Marking
Part Number
FP6770WDG
Product Code
P.
Fig
ure 1. Pin Assignment of FP6770
FP6770-1.3-FEB-2010
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fitipower integrated technology lnc.
FP6770
Typical Application Circuit
Figure 2. Typical Application Circuit of FP6770
Functional Pin Description
Pin Name
VOUT
GND
SHDN
Pin Function
Regulated output voltage. For best performance, V
OUT
should be bypassed with a 1μF (min.) low ESR capacitor
as close as possible to the pin.
Ground. Should be tied to a ground plane for best performance.
Active low shutdown input. A low voltage on
SHDN
disables the FP6770.
SHDN
is not allowed to float.
Flying capacitor negative terminal.
Input supply voltage. V
IN
should be bypassed with a 1μF (min.) low ESR capacitor.
Flying capacitor positive terminal.
C-
VIN
C+
Block Diagram
V
IN
C
IN
VOUT
C+
C
OUT
C
FLY
Control
COMP
C-
VREF
SHDN
Figure 3. Block Diagram of FP6770
FP6770-1.3-FEB-2010
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fitipower integrated technology lnc.
FP6770
Absolute Maximum Ratings
●
V
IN
to GND------------------------------------------------------------------------------------------------------ 6V
●
V
OUT
to GND---------------------------------------------------------------------------------------------------- 6V
●
All Other Pins to GND---------------------------------------------------------------------------------------- 6V
●
Power Dissipation (P
D
) @ T
A
=25℃:
SOT-23-6 / TSOT-23-6 ---------------------------------------------------------------------- 0.4W
TDFN-6 (1.6mX1.6m)(P
D
)------------------------------------------------------------------- 1.25W
●
Package Thermal Resistance:
SOT-23-6 / TSOT-23-6 (θ
JA
)---------------------------------------------------------------- 250°C/W
TDFN-6(1.6mX1.6m)------------------------------------------------------------------------ 80℃/W
●
Junction Temperature---------------------------------------------------------------------------------------- 150°C
●
Storage Temperature Range------------------------------------------------------------------------------- -65°C to 150
°C
●
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------- 260°C
Note：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device.
Recommended Operating Conditions
●
Supply Voltage (V
IN
) ----------------------------------------------------------------------------------------- (2.7V to 4.5V) ±10%
●
Operation Temperature Range---------------------------------------------------------------------------- -40°C to +85°C
Electrical Characteristics
(T
A
=25°C, C
FLY
=1μF, C
IN
=1μF, C
OUT
=1μF, unless otherwise specified.)
Parameter
Input Voltage
Output Voltage
Continuous Output Current
Supply Current
Shutdown Current
Efficiency
Switching Frequency
/SHDN Input Threshold
Symbol
V
IN
V
OUT
I
OUT
I
CC
I
SHDN
η
f
OSC
V
IH
V
IL
I
IH
I
IL
t
ON
I
SC
2.7V≤ V
IN
< 4.5V, I
OUT
≤
60mA
3.0V≤ V
IN
≤
4.5V, I
OUT
≤
120mA
V
IN
=3.0V, V
OUT
=5.0V,
SHDN
=V
IN
2.7V≤ V
IN
≤
5.0V, I
OUT
=0,
SHDN
=V
IN
2.7V≤ V
IN
≤
5.0V, I
OUT
=0,
SHDN
=0V
V
IN
=2.7V, I
OUT
=60mA
Oscillator Free Running
V
IN
=3.0V, output on
V
IN
=3.0V, output off
SHDN
=V
IN
SHDN
= 0V
Conditions
Min
2.7
4.8
4.8
100
Typ
Max
4.5
Unit
V
V
V
mA
5
5
5.2
5.2
3
0.01
90
2
1.4
4.5
1.0
mA
μA
%
MHz
V
0.3
-1
-1
200
300
1
1
V
μA
μA
µS
mA
/SHDN Leakage Current
V
OUT
Turn On Time
Output Short Circuit Current
FP6770-1.3-FEB-2010
V
IN
=3V, I
OUT
= 1mA
V
IN
=3V, V
OUT
= 0V,
SHDN
=V
IN
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fitipower integrated technology lnc.
FP6770
Typical Performance Curves
5.4
5.10
C
IN
=C
OUT
=C
FLY
=1
μ
F
5.3
I =20mA
OUT
5.2
C
IN
=C
OUT
=C
FLY
=1
μ
F
5.05
T
A
=20 C
O
Output Voltage (V)
T
A
=-45 C
T
A
=20 C
O
O
Output Voltage (V)
5.00
4.95
4.90
4.85
4.80
4.75
4.70
5.1
5.0
4.9
4.8
4.7
4.6
2.7
V
IN
=3.2V
V
IN
=2.9V
T
A
=85 C
O
V
IN
=2.7V
3.0
3.3
3.6
3.9
4.2
4.5
20
40
60
80
100
120
140
160
Supply Voltage (V)
Output Current (mA)
Figure 4. Output Voltage vs. Supply Voltage
3.50
Figure 5. Output Voltage vs. Load Current
2.20
3.25
C
IN
=C
OUT
=C
FLY
=1
μ
F
V
SHDN
=V
IN
2.15
C
IN
=C
OUT
=C
FLY
=1
μ
F
V
SHDN
=V
IN
T
A
=20 C
T
A
=-45 C
T
A
=85 C
O
O
O
Oscillator Frequency (MHz)
Supply Current (mA)
2.10
2.05
2.00
1.95
1.90
1.85
1.80
2.7
3.00
T
A
=20 C
2.75
O
T
A
=-45 C
O
2.50
T
A
=85 C
2.25
O
2.00
2.7
3.0
3.3
3.6
3.9
4.2
4.5
3.0
3.3
3.6
3.9
4.2
4.5
Supply Voltage (V)
Supply Voltage (V)
Figure 6. No Load Supply Current vs. Supply Voltage
1.6
1.5
Figure 7. Oscillator Frequency vs. Supply Voltage
500
Short Circuit Current (mA)
4.5
T
A
=-45 C
T
A
=20 C
O
O
C
IN
=C
OUT
=C
FLY
=1
μ
F
V
SHDN
=V
IN
400
Threshold Voltage (V)
1.4
1.3
1.2
1.1
1.0
0.9
2.7
T
A
=85 C
O
300
200
100
3.0
3.3
3.6
3.9
4.2
0
2.7
3.0
3.3
3.6
3.9
4.2
4.5
Supply Voltage (V)
Supply Voltage (V)
Figure 8. VSHDN Threshold Voltage vs. Supply Voltage
Figure 9. Short Circuit Current vs. Supply Voltage
FP6770-1.3-FEB-2010
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fitipower integrated technology lnc.
FP6770
Typical Performance Curves (Continued)
100
C
IN
=C
OUT
=C
FLY
=1
μ
F
90
80
T
A
=25 C
O
V
IN
=2.7V
V
IN
=3.2V
V
IN
=3.7V
V
IN
=4.5V
Efficiency (%)
70
60
50
40
30
20
1
10
100
Load Current (mA)
100us/div
Figure 10. Efficiency vs. Load Current
Figure 11. Output Voltage Start Up
FP6770-1.3-FEB-2010
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