XC6351A
Series
Charge Pump Voltage Inverter IC
ETR0801_001
■
GENERAL DESCRIPTION
The XC6351A series are charge pump voltage inverter ICs that have 4 MOSFETs built in. Since highly efficient negative
voltages can be generated with only 2 external capacitors connected, GaAs bias power supplies & OpAmp's negative power
supplies etc., can be easily accommodated on a standard PCB.
A mini-molded, 6 pin, SOT-26 and USP-6B packages provides for space saving and makes high density mounting possible.
Low power consumption and high efficiency make this series perfect for use with battery operated applications.
Since the IC's operations stop when output is shutdown via the CE (chip enable) function, total power consumption reduction
is possible in applications which use this IC.
■APPLICATIONS
●Cellular
and portable phones
●Miniature
LCD panels
●Palmtop
computers, PDAs
●Various
battery powered systems
■FEATURES
Operating Voltage Range
Oscillation Frequency
Low Supply Current
: 1.2V ~ 5.0V
: 120kHz
: 35kHz ( custom )
: 310μA ( TYP. )
100μA
(35kHz custom TYP.)
High Efficiency
Stand-by Current
CE(Chip Enable) Function
Ultra Small Package
: SOT-26 ,USP-6B
: 90% (TYP.) ( RL = 2kΩ)
: 2.0μA (MAX.)
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
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XC6351A
Series
■PIN
CONFIGURATION
GND
CE
C1+
C1-
V
IN
V
OUT
*The dissipation pad for the USP-6B
package should be solder-plated in
recommended mount pattern and metal
masking so as to enhance mounting
strength and heat release.
If the pad needs to be connected to
other pins, it should be connected to
the V
IN
pin.
■PIN
ASSIGNMENT
PIN NUMBER
SOT-26
USP-6B
1
2
3
4
5
6
6
5
4
3
2
1
SYMBOL
GND
CE/
C1+
V
OUT
V
IN
C1-
FUNCTION
Ground
Chip Enable (Low Active)
External Capacitor +Pin
Reverse Output
Power Supply
External Capacitor -Pin
■PRODUCT
CLASSIFICATION
●Ordering
Information
XC6351A
①②③④⑤
DESIGNATOR
① ② ③
DESCRIPTION
Oscillation Frequency
SYMBOL
120
035
M
D
R
L
: 120kHz
: 35kHz (custom)
: SOT-26
: USP-6B
: Embossed tape, standard feed
: Embossed tape, reverse feed
DESCRIPTION
④
Package
⑤
Device Orientation
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XC6351A
Series
■BLOCK
DIAGRAM
C1+
C1-
V
IN
P1
N2
N3
CE/
Chip
Enable
N4
V
OUT
Oscillator
Buffer
Note:
1. In operation, the following conditions will be repeated
alternately:
P1 & N3 ON: N2 & N4 OFF
P1 & N3 OFF: N2 & N4 ON
2. In standby mode, P1, N3 & N4 will be ON and N2 will be OFF.
The output pin V
OUT
will be connected to GND.
GND
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
V
IN
Input Voltage
V
OUT
Pin Voltage
C1+ Pin Voltage
C1- Pin Voltage
CE/ Pin Voltage
I
OUT
Pin Current
Power Dissipation
SOT-26
USP-6B
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
IN
V
OUT
C1+
C1-
CE/
I
OUT
Pd
Topr
Tstg
RATINGS
6.0
-6½0.3
-0.3½V
IN
+ 0.3
V
OUT
- 0.3½0.3
-0.3½V
IN
+ 0.3
50
150
100
-30½＋80
-40½＋125
Ta = 25℃
UNITS
V
V
V
V
V
mA
mW
℃
℃
Note: Voltage is all ground standardized.
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XC6351A
Series
■ELECTRICAL
CHARACTERISTICS
FOSC＝120kHz, Ta=25℃
PARAMETER
Supply Current
Operating Voltage Range
Oscillation Frequency
Power Transition Efficiency
Voltage Transition Efficiency
Output Impedance
Stand -by Current
CE/ 'H' Level Voltage
CE/ 'L' Level Voltage
SYMBOL
I
DD
V
IN
FOSC
EFFI
V
EFFI
R
OUT
I
STB
V
CEH
V
CEL
R
L
＝2kΩ
R
L
＝∞
R
L
＝5kΩ
CE/＝V
IN
CONDITIONS
R
L
＝5kΩ
MIN.
-
1.2
75
-
95
-
-
0.9
-
TYP.
310
-
120
90
-
45
-
-
-
MAX.
520
5.0
192
-
-
90
2.0
-
0.25
UNITS
μA
V
kHz
%
%
Ω
μA
V
V
CIRCUIT
1
2
1
2
2
2
3
3
3
Measuring Conditions: Unless otherwise stated, V
IN
= 5.0V, CE/ = 0V
■
TYPICAL APPLICATION CIRCUIT
●Standard
Circuit
External components:
C
IN
= 1μF (ceramic capacitor)
C1 = C2 = 1μF (ceramic capacitor)*
* With the custom 35kHz frequency, C1 = C2 = 3.3
μF
■
NOTES ON USE
1. Please use the IC & external components: within the specified electrical characteristics range and ensure that
absolute maximum ratings are not exceeded.
2. For C1 & C2, please use a capacitor with as small an ESR value as possible.
3. In order to reduce impedance between the IC's input pin and the power supply, we recommend that a capacitor (C
IN
)
be connected to the input side.
4. If an external power supply is applied to the output pin in order to have V
OUT
connected to GND during standby,
large current flows through the IC are a possibility.
capacitance value.
Further, do not use a capacitor at C2 that has a large
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XC6351A
Series
■TEST
CIRCUITS
External components:
C
IN
= 1μF (ceramic capacitor)
C1 = C2 = 1μF (ceramic capacitor)*
* With the custom 35kHz frequency, C1 = C2 = 3.3μF
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