Rainbow Electronics BD6112FVM User Manual

Programmable negative supply IC

BD6112FVM

Description Dimension (Units : mm)

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.

0.9Max.

4.0±0.2

0.475

2.8±0.1

0.75±0.05

2.9±0.1

58 7 6

41 2 3

0.65

0.08±0.05

MSOP8

0.22

+0.05

-

0.04

0.08 S

0.29±0.15

0.145

0.08

00W148A

0.6±0.2

+0.05

-

0.03

M

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)

–0.3

–0.3

Limits

~

~

350

~

~

+6.0

+6.0

*

+85–30

+125–55

Parameter Symbol

Maximum applied supply voltage

Maximum applied input voltage

Power dissipation

Operating temperature range

Storage temperature range

VBAT

VIN

Pd

Topr

Tstg

*Derating : 3.5mW/˚C for operation above Ta=25˚C

Unit

V

V

mW

˚C
˚C

February, 2001

Recommended Operating Conditions (Ta=25˚C)

Parameter Min. Max. UnitTyp.Symbol

Power supply voltage

VBAT

V5.53.62.5

Electrical characteristics (Unless otherwise noted; Ta=25˚C, VBAT=3.6V, STBY=3.6V)

Symbol Min. Max. Unit ConditionsTyp.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

Stand-by pin pull down resistance

Stand-by pin
control voltage

Operating
Non-operating

IQ1 –

IQ2

Vo

Vo2

Vo x 0.95

VRR

IOMAX

∆VOL

∆VOI

IIN

fosc

VCE

RSTBY

VIH
VIL

–

–2.1

–
10
–

–
–

–
–

0.6

2.0

–0.3

0.5

–

–2.0

Vo

–70

–

2

10

0

120

97

1.0

–
–

3

5

–1.9

Vo x 1.05

–60

–
40

40

2

–
–

1.6

–

0.3

mA

µA

V

V

dBV

mA
mV

mV
µA

kHz

%

MΩ

V
V

No load, VIN=1.25V

No load, VIN=0V, STBY=0V

VIN=1.25V, IOUT=5mA

VIN=0.5~1.8V, Vo=–1.6 x VIN,IOUT=5mA
VIN=1.25V, IOUT=5mA
VIN=1.25V, VOUT≤Vo+0.1V
VIN=1.25V, Io=0~5mA

VBAT=3.0~6.0V, Io=5mA
VIN=1.25V

No load, NEGOUT monitor

Application Circuit

+

C1

1µ

NEGOUT

C2

+

1

µ

GND

C+

C-

1

CHARGE

VBAT

8

1µ

+

C4

PUMP

2

1M

3

1.6M

4

+ -

+

1M

BD6112FVM

STBY

7

OUT

6

+

1µ

C3

VIN

5