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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)
2.90.1
8765
4.00.2
2.80.1
0.475 0.9Max. 0.750.05 0.080.05
1234
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 1M) 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=25C)
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 ~ ~ ~ ~ +6.0 +6.0 +85 +125 Unit V V mW
350 *
C C
*Derating : 3.5mW/C for operation above Ta=25C
0.290.15 0.60.2 0.145 +0.05 -0.03 0.08 M
February, 2001
Recommended Operating Conditions (Ta=25C)
Parameter Power supply voltage Symbol VBAT Min. 2.5 Typ. 3.6 Max. 5.5 Unit V
Electrical characteristics (Unless otherwise noted; Ta=25C, VBAT=3.6V, STBY=3.6V)
Parameter Circuit current Stand-by current Output voltage 1 Output voltage 2 Output ripple voltage Maximum output current Load regulation Line regulation VIN pin inflow current Oscillation frequency Voltage conversion efficiency fosc VCE - - 0.6 2.0 -0.3 120 97 1.0 - - - - 1.6 - 0.3 kHz % M V V No load, NEGOUT monitor Vo Vo2 VRR IOMAX VOL VOI IIN -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 A 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, VOUTVo+0.1V VIN=1.25V, Io=0~5mA VBAT=3.0~6.0V, Io=5mA VIN=1.25V Symbol IQ1 IQ2 Min. - - Typ. 0.5 - Max. 3 5 Unit mA A Conditions No load, VIN=1.25V No load, VIN=0V, STBY=0V
Stand-by pin pull down resistance RSTBY Operating VIH Stand-by pin control voltage Non-operating VIL
Application Circuit
C+
1 CHARGE PUMP
8
VBAT + 1 C4
C1 1
+ GND
2
7
STBY
1M C-
3
1.6M
6
OUT 1 + C3
NEGOUT C2 1 +
4
+
-
+ 1M BD6112FVM
5
VIN

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