00W148A
Programmable negative supply IC
BD6112FVM
Description
BD6112FVM is a charge-pump negative supply IC
with a built-in regulator. The charge-pump block
inverts the positive supply voltage in the VBAT pin
into a negative voltage, which generates from the
NEGOUT pin. The regulator block stabilizes
this negative voltage with low-noise that produces
from the OUT pin. Output voltage values of this
regulator can be controlled by voltage value inputted
to the VIN pin and determined by OUT=—1.6 x VIN.
Dimension (Units : mm)
2.9±0.1
8 7 6 5
4.0±0.2
2.8±0.1
0.475
0.9Max.
0.75±0.05
0.08±0.05
1 2 3 4
0.22
+0.05
-0.04
0.65
0.08 S
MSOP8
Features
1) Built-in high efficiency, inverting charge-pump
2) Built-in negative voltage regulator
(low noise, output voltage variable)
3) Built-in standby SW (pull down resistance 1MΩ)
4) Ultra small MSOP8 package
Applications
Small terminal devics such as cellular phones, PHS, and PDA etc.
Other equipments driven by battery required for negative voltage.
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Maximum applied supply voltage
Maximum applied input voltage
Power dissipation
Operating temperature range
Storage temperature range
Symbol
VBAT
VIN
Pd
Topr
Tstg
–30
–55
–0.3
–0.3
Limits
~
~
350
~
~
+6.0
+6.0
Unit
V
V
mW
*
+85
+125
˚C
˚C
*
Derating : 3.5mW/˚C for operation above Ta=25˚C
0.29±0.15
0.6±0.2
0.145
+0.05
-0.03
0.08
M
February, 2001
Recommended Operating Conditions (Ta=25˚C)
Parameter
Power supply voltage
Symbol
V
BAT
Min.
2.5
Typ.
3.6
Max.
5.5
Unit
V
Electrical characteristics (
Unless otherwise noted; Ta=25˚C, VBAT=3.6V, STBY=3.6V)
Parameter
Circuit current
Stand-by current
<Regulator block>
Output voltage 1
Output voltage 2
Output ripple voltage
Maximum output current
Load regulation
Line regulation
VIN pin inflow current
<Charge-pump block>
Oscillation frequency
Voltage conversion efficiency
fosc
V
CE
–
–
0.6
2.0
–0.3
120
97
1.0
–
–
–
–
1.6
–
0.3
kHz
%
MΩ
V
V
No load, NEGOUT monitor
Vo
Vo
2
V
RR
I
OMAX
∆V
OL
∆V
OI
I
IN
–2.1
Vo x 0.95
–
10
–
–
–
–2.0
Vo
–70
–
2
10
0
–1.9
Vo x 1.05
–60
–
40
40
2
V
V
dBV
mA
mV
mV
µA
V
IN
=1.25V, I
OUT
=5mA
V
IN
=0.5~1.8V, Vo=–1.6 x V
IN
,I
OUT
=5mA
V
IN
=1.25V, I
OUT
=5mA
V
IN
=1.25V, V
OUT
≤Vo+0.1V
V
IN
=1.25V, Io=0~5mA
V
BAT
=3.0~6.0V, Io=5mA
V
IN
=1.25V
Symbol
I
Q
1
I
Q
2
Min.
–
–
Typ.
0.5
–
Max.
3
5
Unit
mA
µA
Conditions
No load, V
IN
=1.25V
No load, V
IN
=0V, STBY=0V
Stand-by pin pull down resistance
R
STBY
Operating
V
IH
Stand-by pin
control voltage Non-operating
V
IL
Application Circuit
C+
1
CHARGE
PUMP
8
VBAT
+
1µ
C4
C1
1µ
+ GND
2
7
STBY
1M
C-
3
1.6M
6
OUT
1µ
+
C3
NEGOUT
C2
1µ
+
4
+
-
+
1M
BD6112FVM
5
VIN
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