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BD4201FV
Regulators
Battery Backup IC
BD4201FV
BD4201FV is a battery backup IC. Switch that detect battery voltage and switch into back up power supply and 3-channel regulator are incorporated into a single chip. Current consumption is 15µA (Max.). This IC is perfect for portable appliances.
zApplications Portable video, Digital camera
zExternal dimensions (Unit : mm)
3.0±0.2
8 5
zFeatures 1) Low quiescent current Normal operation < 15.0µA Max. Backup mode < 2.1µA Max. 2) 3 high accurate voltage regulators 3) Low dropout voltage, and high accurate voltage detectors (CS, RESET) 4) Control circuit; Backup 5) Special sequence; For shifting to the backup mode. It need to make main battery over +Vdet1 once.
6.4±0.3 4.4±0.2
1
4
0.15±0.1 0.1
1.15±0.1 0.1
0.22±0.1 0.65
(0.52)
SSOP-B8
zAbsolute maximum ratings (Ta=25°C)
Parameter Main power supply input Voltage Back up power supply input Voltage CS output Voltage RESRT output Voltage Power dissipation Operating temperature Storage temperature
+ +
Symbol Vin Vbat Vcs VRES Pd Topr Tstg
Limits 15 15 15 15 350 ∗ −30 to +85 −40 to +125
Unit V V V V mW C C
∗70mm 70mm 1.6mm Glass fiber basis subtract 3.5mW / C when over 25 C
zCommendable operating status (Ta=25°C)
Parameter Power supply range Backup power supply range Load current range1 Load current range2 Load current range3 Symbol Vin Vbat Iro Iout Ich Min. 2.0 2.0 0 0 0 Typ. Max. 15.0 15.0 20.0 60.0 20.0 Unit V V mA mA mA
0.3Min.
1/8
Regulators
zBlock diagram
Vout
Vin M1 RESET Voltage detector
Vbat
REG2
Vch
Fig. 1
Vsw1 Detection circuit DELAY REG1
Q R S Q R S
CS
CS Voltage detection
REG3
RESET
Switch control circuit
Vsw2 Detection circuit
Vro
Vss
BD4201FV
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BD4201FV
Regulators
zCircuit around pin
Pin No. 1 Pin Name Vss Function Ground Pin Pin No. 2 Pin Name Vch Vch Vss Function Regulator 3 output Pin Vin
3
Vbat Vbat
Back up power supply input Pin
4
CS CS
CS voltage detector output Pin
5
RESET
RESET voltage detector output Pin
6
Vout
Regulator2 output Pin
Vin RESET Vout
Vbat
7
Vin
Main power supply input Pin
8
Vro Vin
Regulator1 output Pin Vin
Vin Vro
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BD4201FV
Regulators
zElectrical characteristics (Unless otherwise specified Vin=6V, Ta=25°C)
Parameter Symbol lin1 lbat1 lbat2 Vro Vdif1 Vlo1 Vli1 Vout Vdif2 Vlo2 Vli2 Vch Vdif3 Vlo3 Vli3 −Vdet1 +Vdet1 −Vdet2 +Vdet2 +Tdet2 Vopr lcss lcst lres lrel Vsw1 Vsw2 IIek Rsw Min. − − − 2.93 − − − 2.93 − − − 3.32 − − − 3.235 3.320 2.156 2.232 200 2.0 250 − 150 − 2.822 2.79 − − Typ. 10 0.0 1.5 3.00 0.1 30 50 3.00 0.25 30 60 3.30 0.1 30 50 3.300 3.400 2.200 2.312 300 − 500 − 300 − 2.89 2.85 − 30 − − 0.1 − 0.1 2.958 2.91 1 60 Max. 15 0.5 2.1 3.07 0.35 100 100 3.07 0.35 110 110 3.38 0.35 110 110 3.365 3.480 2.244 2.391 Units µA µA µA V V mV mV V V mV mV V V mV mV V V V V µS V µA µA µA µA V V µA Ω Vin or Vbat Vcs=0.5V, Vin=Vbat=2.0V Vcs=15V, Vin=15V Vreset=0.5V, Vin=Vbat=2.0V Vreset=15V, Vin=15V Vbat=2.8V Vbat=3V Vin=3.6V, Vbat=0V Vin=OPEN, Vbat=3V, Iout=10~50.