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. zExternal dimensions (Unit : mm) zApplications Portable video, Digital camera 3.0±0.2 5 1 4 6.4±0.3 4.4±0.2 0.3Min. 8 1.15±0.1 0.1 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. (0.52) 0.15±0.1 0.1 0.22±0.1 0.65 SSOP-B8 zAbsolute maximum ratings (Ta=25°C) Parameter Main power supply input Voltage Symbol Limits Unit Vin 15 V Back up power supply input Voltage Vbat 15 V CS output Voltage Vcs 15 V VRES 15 RESRT output Voltage Power dissipation V 350 ∗ Pd mW Operating temperature Topr −30 to +85 C Storage temperature Tstg −40 to +125 C + + ∗70mm 70mm 1.6mm Glass fiber basis subtract 3.5mW / C when over 25 C zCommendable operating status (Ta=25°C) Parameter Symbol Min. Unit 2.0 Typ. - Max. Vin 15.0 V Vbat 2.0 - 15.0 V Load current range1 Iro 0 - 20.0 mA Load current range2 Iout 0 - 60.0 mA Load current range3 Ich 0 - 20.0 mA Power supply range Backup power supply range 1/8 CS Vin CS Voltage detection Vro REG1 Vsw1 Detection circuit R S R S Q Q Vss Switch control circuit REG2 Vout Vsw2 Detection circuit DELAY REG3 RESET Voltage detector M1 RESET Vch Vbat BD4201FV Regulators zBlock diagram Fig. 1 2/8 BD4201FV Regulators zCircuit around pin Pin No. Pin Name 1 Vss Function Ground Pin Pin No. Pin Name 2 Vch Function Regulator 3 output Pin Vin Vch Vss 3 Vbat Back up power supply input Pin 4 Vbat 5 RESET CS CS voltage detector output Pin CS RESET voltage detector output Pin 6 Regulator2 output Pin Vout Vin Vbat RESET Vout 7 Vin Main power supply input Pin 8 Vro Regulator1 output Pin Vin Vin Vin Vro 3/8 BD4201FV Regulators zElectrical characteristics (Unless otherwise specified Vin=6V, Ta=25°C) Parameter Symbol Min. Typ. Max. Units Conditions [General spec] lin1 − 10 15 µA Vin=3.6V Backup circuit current1 lbat1 − 0.0 0.5 µA Vin=3.6V Vbat=3V Backup circuit current2 lbat2 − 1.5 2.1 µA Vin : Open Vbat=3V Output voltage 1 Vro 2.93 3.00 3.07 V Vin=7.2V, lro=3mA Dropout voltage 1 Vdif1 − 0.1 0.35 V lro=3mA Main circuit current1 No load No load No load [Regulator1] Load regulation 1 Vlo1 − 30 100 mV Vin=7.2V, lro=100µA∼20mA Linc regulation 1 Vli1 − 50 100 mV Vin=4∼10V, lro=3mA [Regulator2] Output voltage 2 Vout 2.93 3.00 3.07 V Vin=7.2V, lout=23mA Dropout voltage 2 Vdif2 − 0.25 0.35 V lout=23mA Load regulation 2 Vlo2 − 30 110 mV Vin=7.2V, lout=100µA∼60mA Linc regulation 2 Vli2 − 60 110 mV Vin=4∼10V, lout=23mA [Regulator3] Output voltage 3 Vch 3.32 3.30 3.38 V Vin=7.2V, lch=3mA Dropout voltage 3 Vdif3 − 0.1 0.35 V lch=3mA Load regulation 3 Vlo3 − 30 110 mV Vin=7.2, Ich=100µA∼20mA Linc regulation 3 Vli3 − 50 110 mV Vin=4∼10V, lch=3mA Vin voltage detection [Voltage detect block] CS detect voltatge −Vdet1 3.235 3.300 3.365 V CS release voltage +Vdet1 3.320 3.400 3.480 V RESET detect voltage −Vdet2 2.156 2.200 2.244 V RESET release voltage +Vdet2 2.232 2.312 2.391 V RESET release delay time +Tdet2 200 300 Vopr 2.0 − − V Vin or Vbat Low operating voltage Vout voltage detection µS CS sink current lcss 250 500 − µA Vcs=0.5V, Vin=Vbat=2.0V CS leak current lcst − − 0.1 µA Vcs=15V, Vin=15V RESET sink current lres 150 300 − µA Vreset=0.5V, Vin=Vbat=2.0V RESET leak curent lrel − − 0.1 µA Vreset=15V, Vin=15V Switch voltage Vsw1 2.822 2.89 2.958 V Vbat=2.8V CS no output voltage Vsw2 2.79 2.85 2.91 V Vbat=3V Vbat switch leak current IIek − − 1 µA Vin=3.6V, Vbat=0V Vbat switch resistor Rsw − 30 60 Ω Vin=OPEN, Vbat=3V, Iout=10~500µA [Switch control block] This product is not designed for protection against radioactive rays. 4/8 BD4201FV Regulators zMeasurement circuit 1 Vss Vro 8 10µF SW1 a 2 Vch b Vin 10µF V V1 Ich Vout 6 3 Vbat SW2 a 7 b V SW3 b a A I1 Iro b SW5 10µF V V4 V3 V I4 I3 a Iout RESET 5 V V2 a A CS a SW7 b SW6 A I2 4 V5 b c d A I6 a b A SW4 Fig.2 zApplication circuit 1 Vss Vro 8 Vro 10µF 2 Vch Vch Vin 7 10µF Vout 6V 3 Vout 6 Vbat Vout 22µF 3V 100kΩ 100kΩ CS 4 CS RESET 5 0.01µF RESET 0.01µF Fig.3 5/8 BD4201FV Regulators zNote for use 1. 2. 3. 4. 5. 6. 7. 8. The application circuit is recommended for use. Make sure to confirm the adequacy of the characteristics. When using the circuit with changes to the external circuit constants, make sure to leave an adequate margin for external components including static and transitional characteristics as well as dispersion of the IC. Operation supply voltage range The circuit functionality is guaranteed within the operation of ambient temperature range, as long as it is within the operation supply voltage range. The standard of electrical characteristic values cannot be guaranteed at other voltages in the operating range, however, the variation will be small. The regulator output circuit of this IC does not include protect circuit for the unusual situations such as over voltage current protection, short detect circuit and thermal shut-down circuit. Therefore, this IC might be broken down when it is loaded exceeding the package power, or when it is shorted. To design application circuit, please deal it with enough consideration. Oscillation stopper of output and bypass capacitor Please put into capacitor to stop oscillation between output pin and GND. It has a possibility of oscillation if capacitance is changed due to temperature range, and it recommends to use small tantalum electrolytic capacitor of equivalents serial resistor (ESR). If extremely big capacitor is used, it may have a case to occur oscillation of low frequency. Please confirm this point. And it recommend to put into bypass capacitor into the nearest position between input pin and GND. For the grounding shown in the application circuit, wire every ground to GND terminal in a short pattern arrangement to avoid electrical disturbance. This product is produced with strict quality control, but might be destroyed in using beyond absolute maximum ratings is considered. Open IC destroyed a failure mode cannot be defined (I like short mode, or open mode). Therefore, physical security countermeasure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is considered. Mal-function may happen when the device is used in the strong electromagnetic field. Recommended to put DIODE for protection purpose in case of output pin connected with large load of inpedance or reserve current occurred at initial and output off. (Example) 9. OUTPUT PIN This IC is monolithic IC which (as shown in Figure-4) has P+ isolation in the P substrate and between the various pins. A P-N junction is formed from this P layer and N layer of each pin. For example, the relation between each potentials is as follows; (When GND > pinB and GND > pinA, the P-N junction operates as parasitic diode.) (When > pinB > GND > pinA, the P-N junction operates as parasitic transistor.) Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits as well as operation faults and physical damage. Accordingly, Please do not use methods by which parasitic diode operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin. 6/8 BD4201FV Regulators Transistor (NPN) Resistance (Pin B) ~ B (Pin A) ~ C E N P P+ P P P P+ N N N N N N P substrate GND P substrate Parasitic diode (Pin A) Parasitic diode or transistor (Pin B) ~ C ~ B parasitic diode GND GND Parasitic diode or transistor Fig.4 Simplified structure of IC zPin layout Vss 1 8 Vro Vch 2 7 Vin Vbat 3 6 Vout CS 4 5 RESET Fig. 5 7/8 BD4201FV Regulators zElectrical characteristic curves (mW) Power dissipation 500 400 300 200 100 25 50 75 100 Temperature 125 150 ( C) Fig.6 Power dissipation curve 8/8 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.0