S-8426AAA-J8T1U

S-8426A Series BATTERY BACKUP SWITCHING IC www.ablicinc.com © ABLIC Inc., 2006-2015 Rev.2.0_03 The S-8426A Series is a CMOS IC designed for use in the switching circuits of primary and backup power supplies on a single chip. It consists of two voltage regulators, three voltage detectors, a power supply switch and its controller, as well as other functions. In addition to the switching function between the primary and backup power supply, the S-8426A Series can provide the micro controllers with three types of voltage detection output signals corresponding to the power supply voltage. Moreover adopting a special sequence for switch control enables the effective use of the backup power supply, making this IC ideal for configuring a backup system. Features Low power consumption Normal operation: 15 A Max. (VIN = 6 V) Backup: 4.5 A Max. Voltage regulator Output voltage tolerance : 2% Output voltage: Independently selectable in 0.1 V steps in the range of 2.3 to 5.4 V Three built-in voltage detectors (CS, PREEND , RESET ) Detection voltage precision: 2% Detection voltage: Selectable in 0.1 V steps in the range of 2.4 to 5.3 V (CS voltage detector) Selectable in 0.1 V steps in the range of 1.7 to 3.4 V ( PREEND , RESET voltage detector) Switching circuit for primary power supply and backup power supply configurable on one chip Efficient use of backup power supply possible Special sequence Backup voltage is not output when the primary power supply voltage does not reach the initial voltage at which the switch unit operates. Lead-free, Sn 100%, halogen-free*1 *1. Refer to “ Product Name Structure” for details. Applications Video camera recorders Still video cameras Memory cards SRAM backup equipment Packages 8-Pin TSSOP 8-Pin SOP(JEDEC) 1 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Block Diagram VOUT M1 VIN VBAT REG2 PREEND PREEND Vsw1 Detector CS Voltage detector CS Voltage detector RESET VSW2 Detector RESET Voltage detector Switch controller REG1 VSS Figure 1 2 VRO BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Product Name Structure 1. Product Name S-8426A xx - xxxx x Environmental code U : Lead-free (Sn 100%), halogen-free G : Lead-free (for details, please contact our sales office) Package name (abbreviation) and IC packing specifications *1 T8T1 : 8-Pin TSSOP, Tape J8T1 : 8-Pin SOP(JEDEC), Tape Serial code *2 Sequentially set from AA to ZZ *1. *2. 2. Refer to the taping specifications. Refer to the “3. Product Name List”. Package Package Name 8-Pin TSSOP 8-Pin SOP(JEDEC) Package FT008-A-P-SD FT008-A-P-SD FJ008-A-P-SD FJ008-A-P-SD Environmental code = G Environmental code = U Environmental code = G Environmental code = U Drawing Code Tape FT008-E-C-SD FT008-E-C-SD FJ008-D-C-SD FJ008-D-C-SD Reel FT008-E-R-SD FT008-E-R-S1 FJ008-D-R-SD FJ008-D-R-S1 3. Product Name List Table 1 Model No. S-8426AAA-J8T1x *1. Output Voltage Output Voltage CS Voltage 5.000 5.000 4.500 CS Voltage VOUT 0.95 RESET RESET PREEND PREEND Voltage Voltage Voltage Voltage 2.900 3.068 2.100 2.207 Switch Voltage *1 VDET4 0.77 VDET4 can be calculated by VDET1 with the following equation. VDET4 = ( VDET1) + 15 {( VDET1) 0.8} 372 Set the CS voltage so that the switch voltage (VSW1) is equal to or greater than the RESET detection voltage ( VDET2). Caution Remark 1. 2. The selection range is as follows. VRO, VOUT: 2.3 to 5.4 V (0.1 V steps) VDET1: 2.4 to 5.3 V (0.1 V steps) VDET2: 1.7 to 3.4 V (0.1 V steps ) VDET3: 1.7 to 3.4 V (0.1 V steps) VSW1: VDET1 0.85 or VDET1 0.77 When VSW2 > VDET1, VDET4 0.85 or VDET4 0.77 3. If a product with a voltage other than above is required, contact our sales representative. 4. x: G or U 5. Please select products of environmental code = U for Sn 100%, halogen-free products. 3 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Pin Configurations 8-Pin TSSOP Top view Table 2 8 7 6 5 1 2 3 4 Figure 2 Pin No. 1 2 3 4 5 6 7 8 Symbol VSS PREEND VBAT*1 CS RESET VOUT*1 *1 VIN VRO*1 Description Ground Output pin of PREEND voltage detector Backup power supply input pin Output pin of CS voltage detector Output pin of RESET voltage detector Output pin of voltage regulator 2 Primary power supply input pin Output pin of voltage regulator 1 *1. Mount capacitors between VSS (GND pin) and the VIN, VBAT, VOUT, and VRO pins. (Refer to the “ Standard Circuit”) 8-Pin SOP(JEDEC) Top view Table 3 1 8 2 7 3 6 4 5 Figure 3 Pin No. 1 2 3 4 5 6 7 8 Symbol VSS PREEND VBAT*1 CS RESET VOUT*1 VIN*1 VRO*1 Description Ground Output pin of PREEND voltage detector Backup power supply input pin Output pin of CS voltage detector Output pin of RESET voltage detector Output pin of voltage regulator 2 Primary power supply input pin Output pin of voltage regulator 1 *1. Mount capacitors between VSS (GND pin) and the VIN, VBAT, VOUT, and VRO pins. (Refer to the “ Standard Circuit”) 4 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Absolute Maximum Ratings Table 4 (Unless otherwise specified: Ta = 25 C) Item Primary power supply input voltage Backup power supply input voltage Output voltage of voltage regulator CS output voltage RESET output voltage Symbol VIN VBAT VRO, VOUT VCS V RESET PREEND output voltage V PREEND Absolute Maximum Tatings VSS 0.3 to VSS 18 VSS 0.3 to VSS 18 VSS 0.3 to VIN 0.3 VSS 0.3 to VSS 18 Unit V V V V VSS 0.3 to VSS 18 V VSS 0.3 to VSS 18 V 700*1 850*1 40 to 85 40 to 125 mW mW C C 8-Pin TSSOP Power dissipation PD 8-Pin SOP(JEDEC) Operating ambient temperature Topr Storage temperature Tstg *1. At mounted on printed circuit board [Mounted board] (1) Board size: 114.3 mm × 76.2 mm × t1.6 mm (2) Board name: JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. 1200 1000 800 8-Pin SOP(JEDEC) 8-Pin TSSOP 600 400 200 0 0 50 100 150 Ambient Temperature (Ta) [ C] Figure 4 Power Dissipation of Package (Mounted on Printed Circuit Board) 5 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Electrical Characteristics 1. S-8426AAA Table 5 Item Output voltage 1 Dropout voltage 1 Load stability 1 Input stability 1 Output voltage temperature coefficient 1 Output voltage 2 Dropout voltage 2 Load stability 2 Input stability 2 Output voltage temperature coefficient 2 Primary power input voltage CS detection voltage VIN = 6 V, IRO = 30 mA VIN = 6 V, IRO = 30 mA VIN = 6 V, IRO = 0.1 to 40 mA VIN = 6 to 16 V, IRO = 30 mA VOUT Vdrop2 VOUT1 VOUT2 VOUT Ta VOUT VIN = 6 V, IOUT = 50 mA VIN = 6 V, IOUT = 50 mA VIN = 6 V, IOUT = 0.1 to 60 mA VIN = 6 to 16 V, IOUT = 50 mA VIN VDET1 VDET1 RESET detection voltage VDET2 RESET release voltage VDET2 PREEND detection voltage VDET3 Detection voltage temperature coefficient Sink current Leakage current Conditions VRO Vdrop1 VRO1 VRO2 VRO Ta VRO CS release voltage PREEND release voltage Operating voltage 6 Symbol (1 / 2) Ta = 40 to 85 C Ta = 40 to 85 C VIN voltage detection VOUT voltage detection 2.842 2.994 3.068 3.142 V 2 VBAT voltage detection 2.058 2.100 2.142 V 2 2.154 2.207 2.260 V 2 16 V ppm/ C ppm/ C ppm/ C 2 2.30 mA 3 1.50 2.30 mA 3 1.50 2.30 mA A 3 3 VDET3 Vopr (Unless otherwise specified: Ta = 25 C) Test Min. Typ. Max. Unit Circuit 4.900 5.000 5.100 V 1 356 474 mV 1 50 100 mV 1 5 20 mV 1 ppm/ 100 1 C 4.900 5.000 5.100 V 1 401 540 mV 1 50 100 mV 1 10 30 mV 1 ppm/ 100 1 C 16 V 1 4.410 4.500 4.590 V 2 VOUT VOUT VOUT V 2 0.93 0.95 0.97 1.7 VIN or VBAT VDET1 Ta = 40 to 85 C Ta VDET1 VDET 2 Ta = 40 to 85 C Ta VDET 2 VDET 3 Ta = 40 to 85 C Ta VDET 3 ISINK ILEAK VDS = 0.5 V, VIN = VBAT = 2.0 V 2.900 2.958 100 100 100 RESET PREEND CS VDS = 16 V, VIN = 16 V 1.50 0.1 V 2 2 2 2 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Table 5 Item Symbol Switch voltage VSW1 CS output inhibit voltage VSW2 VBAT switch leakage current ILEAK VBAT switch resistance RSW Switch voltage temperature coefficient CS output inhibit voltage temperature coefficient Current consumption (2 / 2) Conditions Min. 0.1 30 VSW 1 Ta VSW 1 VSW 2 Ta VSW 2 *1. 1.7 Test Circuit V 4 V 5 A 6 7 ppm/ C 4 15 20 3.5 4.5 5.0 ppm/ C A A A A A 8 8 8 8 8 4.0 V 7 100 6 7 0.5 1.5 Unit 60 100 ISS1 ISS2 IBAT1 VBAT Max. VDET4*1 VDET4*1 VDET4*1 0.75 0.77 0.79 VOUT VOUT VOUT 0.93 0.95 0.97 IBAT2 Backup power supply input voltage Typ. 5 VDET4 can be calculated by VDET1 with the following equation. VDET4 = ( VDET1) + 15 {( VDET1) 0.8} 372 Remark The number in the Test Circuit column corresponds to the circuit number in the “ Test Circuits” section. 7 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Test Circuits V VBAT VIN VIN VRO or VOUT VSS 10 F V V VSS 100 k 100 k 100 k VBAT VOUT VIN PREEND VIN RESET CS V V V To measure V DET3, apply 6 V to VIN. Figure 5 Test Circuit 1 VBAT VOUT CS VIN PREEND VIN VSS Figure 6 Test Circuit 2 A V A RESET A VIN VOUT VIN VBAT VBAT V VSS VDS Measure the value after applying 6 V to VIN. Figure 7 Test Circuit 3 VIN Figure 8 Test Circuit 4 Oscillo scope VOUT VIN VBAT 100 k F.G. VIN Oscillo scope VSS VBAT CS A VSS VBAT Figure 9 Test Circuit 5 VIN VBAT VIN VBAT Figure 10 Test Circuit 6 VIN VBAT VOUT IOUT V VSS Leave open and measure the value after applying 6 V to VIN. Figure 11 Test Circuit 7 8 ISS A VIN A IBAT VSS VBAT To measure IBAT2, apply 6 V to VIN and then leave VIN open and measure IBAT. Figure 12 Test Circuit 8 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Operation The internal configuration of the S-8426A Series is as follows. Voltage regulator 1, which stabilizes input voltage (VIN) and outputs it to VRO Voltage regulator 2, which stabilizes input voltage (VIN) and outputs it to VOUT CS voltage detector, which monitors input voltage (VIN) PREEND voltage detector, which monitors output voltage (VBAT) RESET voltage detector, which monitors output voltage (VOUT) Switch unit The functions and operations of the above-listed elements are described below. 1. Voltage Regulators The S-8426A Series features on-chip voltage regulators with a small dropout voltage. The voltage of the VRO and VOUT pins (the output pins of the voltage regulator) can separately be selected for the output voltage in 0.1 V steps between the range of 2.3 to 5.4 V. 1. 1 Dropout voltage Vdrop1, Vdrop2 Assume that the voltage output from the VRO pin is VRO(E) under the conditions of output voltage 1 described in the electrical characteristics table. VIN1 is defined as the input voltage at which output voltage from the VRO pin becomes 98% of VRO(E) when the input voltage VIN is decreased. Then, the dropout voltage Vdrop1 is calculated by the following expression. Vdrop1 = VIN1 VRO(E) 0.98 Similarly, assume that the voltage of the VOUT pin is VOUT(E) under the conditions of output voltage 2 described in the electrical characteristics table. VIN2 is defined as the input voltage at which the output voltage from the VOUT pin becomes 98% of VOUT(E). Then, the dropout voltage Vdrop2 is calculated by the following expression. Vdrop2 = VIN2 VOUT(E) 0.98 2. Voltage Detector The S-8426A Series incorporates three high-precision, low power consuming voltage detectors with hysteresis characteristics. The power of the CS voltage detector is supplied from the VIN and VBAT pins. Therefore, the output is stable as long as the primary or backup power supplies are within the operating voltage range (1.7 to 16 V). All outputs are Nch open-drain, and need pull-up resistors of about 100 k . 2. 1 CS Voltage Detector The CS voltage detector monitors the input voltage (VIN) (VIN pin voltage). The detection voltage can be selected from between 2.4 and 5.3 V in 0.1 V steps. The result of detection is output at the CS pin: “Low” for lower voltage than the detection level and “High” for higher voltage than the release level (however, when the VOUT pin voltage is the CS output inhibit voltage (VSW2), a low level is output) . Release voltage Input voltage Detection voltage Output voltage Figure 13 Definition of Detection and Release Voltages 9 BATTERY BACKUP SWITCHING IC S-8426A Series 2. 2 Rev.2.0_03 PREEND Voltage Detector The PREEND voltage detector monitors input voltage (VBAT) (VBAT pin voltage). The detection voltage can be selected in the range of 1.7 to 3.4 V in 0.1 V step. By using this function, IC notifies if the backup battery is scarce. The result of detection is output at the PREEND pin: “Low” for lower voltages than the detection level and “High” for higher voltages than the release level. 2. 3 RESET Voltage Detector The RESET voltage detector monitors output voltage (VOUT) (VOUT pin voltage). The detection voltage can be selected in the range of 1.7 to 3.4 V in 0.1 V step. The result of detection is output at the RESET pin: “Low” for lower voltages than the detection level and “High” for higher voltages than the release level. RESET outputs the normal logic if the VOUT pin voltage is 1.0 V or more. Caution 3. The PREEND and RESET voltage detectors use the different pins, respectively. Practically, the current is taken from the VBAT side, and consider the I/O voltage difference (Vdif) of M1 when M1 is ON. Switch Unit The switch unit consists of the VSW1 and VSW2 detectors, a switch controller, voltage regulator 2, and switch transistor M1 (Refer to Figure 14). VOUT VIN REG2 Switch controller M1 VSW1 detector Figure 14 10 VBAT VSW2 detector BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 3. 1 VSW1 Detector The VSW1 detector monitors the power supply voltage VIN and sends the results of detection to the switch controller. The detection voltage (VSW1) can be set to 77 2% or 85 2% of the CS release voltage ( VDET1). In the products VSW2 > VDET1, the setting value is 77 2% or 85 2% of VDET4 which is calculated with the following equation. VDET4 = ( VDET1) + 15 × { ( VDET1) – 0.8 } ÷ 372 3. 2 VSW2 Detector The VSW2 detector monitors the VOUT pin voltage and keeps the CS release voltage output low until the VOUT pin voltage rises to VSW2 voltage. The CS pin output then changes from low to high if the VIN pin voltage is more than the CS release voltage ( VDET1) when the VOUT pin voltage rises to 95 2% of the output voltage of voltage regulator 2 (VOUT). The CS pin output changes from high to low regardless of the VSW2 voltage when the VIN pin voltage drops to less than the CS detection voltage ( VDET1). The CS pin output remains high if the VIN pin voltage stays higher than the CS detection voltage ( VDET1) when the VOUT pin voltage drops to less than the VSW2 voltage due to an undershoot. 3. 3 Switch Controller The switch controller controls voltage regulator 2 and switch transistor M1. There are two statuses corresponding to the power supply voltage (VIN) (or power supply voltage (VBAT)) sequence: a special sequence status and a normal sequence status. When the power supply voltage (VIN) rises and becomes equal to or exceeds the CS release voltage ( VDET1), the normal sequence status is entered, but until then the special sequence status is maintained. (1) Special sequence status The switch controller sets voltage regulator 2 ON and switch transistor M1 OFF from the initial status until the primary power supply voltage (VIN) is connected and reaches more than the CS release voltage ( VDET1) in order to prevent consumption of the backup power supply regardless of the VSW1 detector status. This status is called the special sequence status. (2) Normal sequence status The switch controller enters the normal sequence status from the special sequence status once the primary power supply voltage (VIN) reaches more than the CS release voltage ( VDET1). Once the normal sequence is entered, the switch controller switches voltage regulator 2 and switch transistor M1 ON/OFF as shown in Table 6 according to the power supply voltage VIN. The time required for voltage regulator 2 to be switched from OFF to ON is a few hundred s at most. During this interval, voltage regulator 2 and switch transistor M1 may both switch OFF and the VOUT pin voltage may drop. To prevent this, connect a capacitor of 10 F or more to the VOUT pin. When the VOUT pin voltage becomes lower than the RESET detection voltage, the status returns to the special sequence status. IN Power Supply Voltage (VIN) Voltage Regulator 2 Switch Transistor M1 VIN > VSW1 ON OFF VIN < VSW1 OFF ON VOUT Pin Voltage VOUT VBAT Vdif 11 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 3. 4 Switch Transistor M1 Voltage regulator 2 is also used to switch from VIN pin to VOUT pin. Therefore, no reverse current flows from VOUT pin to VIN pin when voltage regulator 2 is OFF. The output voltage of voltage regulator 2 can be selected from between 2.3 V and 5.4 V in 0.1 V steps. The on-resistance of switch transistor M1 is 60 or lower (IOUT = 10 to 500 A). Therefore, when M1 is switched ON and VOUT pin is connected to VBAT pin, the voltage drop (Vdif) caused by M1 is 60 IOUT (output current) at maximum., and VBAT – Vdif (max.) is output to the VOUT pin at minimum. When voltage regulator 2 is ON and M1 is OFF, the leakage current of M1 is kept below 0.1 A max. (VIN = 6 V, Ta = 25 °C) with the VBAT pin grounded (VSS pin). VOUT Vdif VIN REG2 M1 Figure 15 Definition of Vdif 12 VBAT Rev.2.0_03 BATTERY BACKUP SWITCHING IC S-8426A Series Timing Chart V IN (V) V RO (V) V OUT (V) V BAT (V) V CS (V) V PREEND (V) V RESET (V) Remark CS, PREEND and RESET are pulled up to VOUT. Y-axis is an arbitrary scale. Figure 16 Operation Timing Chart 13 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Standard Circuit VRO 10 F VRO 1k VBAT VIN VOUT 6V 10 F 10 F S-8426A Series VSS 0.1 F 3V VOUT RESET CS VOUT 100 k PREEND VOUT VOUT 100 k 100 k Figure 17 Caution 1. 2. Be sure to add a 10 F or more capacitor to the VOUT and VRO pins. The above connections and values will not guarantee correct operation. Before setting these values, perform sufficient evaluation on the application to be actually used. Precautions In applications with small IRO or IOUT, the output voltages VRO and VOUT may rise, causing the load stability to exceed standard levels. Set IRO and IOUT to 10 A or more. Attach the proper capacitor to the VOUT pin to prevent the RESET voltage detector (which monitors the VOUT pin) from coming active due to undershoot. Watch for overshoot and ensure it does not exceed the ratings of the IC chips and/or capacitors attached to the VRO and VOUT pins. Add a 10 F or more capacitor to the VOUT and VRO pins. When VIN rises from the voltage more than VSW1, a low pulse of less than 4 ms flows through the PREEND pin even when VBAT is more than the PREEND release voltage. Thus when monitoring the PREEND pin, make sure to take the 4 ms interval or more after the rise of VIN. Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. ABLIC Inc. claims no responsibility for any and all disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 14 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Application Circuits 1. When Using Timer Micro controllers for Backup to display PREEND in the primary CPU 10 F VOUT VIN 10 F 1k 6V 3V S-8426A Series VBAT VCC Timer microcontroller RESET VRO 100 k CS CS PREEND 0.1 F 10 F 100 k RESET VSS 100 k VCC RESET Main CPU INT Address data Figure 18 Application Circuit 1 15 BATTERY BACKUP SWITCHING IC S-8426A Series 2. Rev.2.0_03 When Using Secondary Battery as Backup Battery 10 F 10 F VRO VOUT VIN VCC S-8426A Series 100 k 100 k CS VBAT Microcontroller INT 6V 3V RESET RESET VSS Figure 19 Application Circuit 2 Remark The backup battery can be floating-recharged by using voltage regulator 1. 3. Memory Card Card unit VIN VIN 10 F VOUT S-8426A Series 10 F SRAM CS BDT2 PREEND BDT1 RESET CS VBAT VSS 0.1 F 3V CS Figure 20 Application Circuit 3 Caution 16 The above connections and values will not guarantee correct operation. Before setting these values, perform sufficient evaluation on the application to be actually used. BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Transient Response 1. Line Transient Response Against Input Voltage Variation The input voltage variation differs depending on whether the power supply input (0 to 10 V square wave) is applied or the power supply variation (6 V and 10 V square waves) is applied. This section describes the ringing waveforms and parameter dependency of each type. The test circuit is shown for reference. 1. 1 Power supply application: 0 to 10 V Square wave Fast amplifier Input voltage 0V 10 V VIN Overshoot Undershoot Oscillo scope VOUT S-8426A Series VSS P.G. COUT Output voltage Figure 21 Power Supply Application: RL Figure 22 Test Circuit 0 to 10 V Square Wave VOUT pin VRO pin COUT = 22 F, IOUT = 50 mA, Ta = 25 C CRO = 22 F, IRO = 30 mA, Ta = 25 C 10 V 10 V Input Voltage (5 V/div) Input Voltage 5 V/div) 0V Output Voltage 0V Output Voltage (0.5 V/div) (0.5 V/div) t (100 s/div) Figure 23 Ringing Waveform of Power Supply Application (VOUT Pin) t (100 s/div) Figure 24 Ringing Waveform of Power Supply Application (VRO Pin) 17 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 1. 2 Power supply variation: 6 V and 10 V square waves Input voltage 6V Fast amplifier 10 V VIN Output voltage Overshoot P.G. VOUT S-8426A Seriers VSS COUT Oscillo scope RL Undershoot Figure 25 Power Supply Variation: Figure 26 Test Circuit 6 V and 10 V Square Waves VOUT pin COUT = 22 F, IOUT = 50 mA, Ta = 25 C 10 V Input Voltage 10 V 6V 6V (4 V/div) Output Voltage (50 mV/div) t (100 s/div) t (100 s/div) Figure 27 Ringing Waveform of Power Supply Variation (VOUT Pin) VRO pin CRO = 22 F, IRO = 30 mA, Ta = 25 C 10 V Input Voltage 10 V 6V 6V (4 V/div) Output Voltage (50 mV/div) t (100 s/div) t (100 s/div) Figure 28 Ringing Waveform of Power Supply Variation (VRO Pin) 18 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 1. 3 Reference data: Dependency of output current (IOUT), load capacitance (COUT), input variation width ( VIN), temperature (Ta) For reference, the following pages describe the results of measuring the ringing amounts at the VOUT and VRO pins using the output current (IOUT), load capacitance (COUT), input variation width ( VIN), and temperature (Ta) as parameters. (1) IOUT Dependency (a) VOUT pin (b) VRO pin COUT = 22 F, VIN = 6 10 V, Ta = 25 C CRO = 22 F, VIN = 6 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 0 20 40 60 0.00 0 10 V, Ta = 25 C 20 IOUT (mA) 40 60 IRO (mA) Figure30 Figure 29 Overshoot Undershoot (2) COUT Dependency (a) VOUT pin (b) VRO pin IOUT = 50 mA, VIN = 6 10 V, Ta = 25 C IRO = 30 mA, VIN = 6 0.50 0.50 0.40 0.40 0.30 0.30 0.20 0.20 0.10 0.10 0.00 0 10 20 30 COUT ( F) Figure 31 40 50 0.00 0 10 20 10 V, Ta = 25 C 30 40 50 CRO ( F) Figure32 Overshoot Undershoot 19 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 (3) VIN Dependency VIN shows the difference between the low voltage fixed to 6 V and the high voltage. For example, VIN = 2 V means the difference between 6 V and 8 V. (a) VOUT pin (b) VRO pin IOUT = 50 mA, COUT = 22 F, Ta = 25 C IRO = 30 mA, CRO = 22 F, Ta = 25 C 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 0.00 0 1 2 3 4 5 0 1 2 VIN (V) 3 4 5 VIN (V) Figure34 Figure 33 Overshoot Undershoot (4) Temperature Dependency (a) VOUT pin VIN = 6 10 V, IOUT = 50 mA, COUT = 22 F 0.30 (b) VRO pin VIN = 6 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00 10 V, IRO = 30 mA, CRO = 22 F 0.30 0.00 50 0 50 Ta ( C) Figure 35 100 50 0 50 100 Ta ( C) Figure 36 Overshoot Undershoot 20 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 2. Load Transient Response Based on Output Current Fluctuation The overshoot and undershoot are caused in the output voltage if the output current fluctuates between 10 A and 50 mA (VRO is between 10 A and 30 mA) while the input voltage is constant. Figure 37 shows the output voltage variation due to the output current. Figure 38 shows the test circuit for reference. The latter half of this section describes ringing waveform and parameter dependency. Input voltage 50 mA VIN VOUT S-8426A Series 10 A VSS Overshoot Output voltage Figure 37 Oscillo scope COUT Undershoot Output Voltage Variation due to Output Current Figure 38 Test Circuit 2. 1 Load Variation Figure 39 shows the ringing waveforms at the VOUT pin and Figure 40 shows the ringing waveforms at the VRO pin due to the load variation, respectively. VOUT pin VIN = 6.0 V, COUT = 22 F, Ta = 25 C 50 mA Output current 50 mA 10 A 10 A Output voltage (50 mV/div) t (50 s/div) t (500 ms/div) Figure 39 Ringing Waveform due to Load Variation (VOUT Pin) VRO pin VIN = 6.0 V, CRO = 22 F, Ta = 25 C 30 mA Output current 30 mA 10 A 10 A Output voltage (20 mV/div) t (20 ms/div) t (50 s/div) Figure 40 Ringing Waveform due to Load Variation (VRO Pin) 21 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 2. 2 Reference data: Dependency of input voltage (VIN), load capacitance (COUT), output variation width ( IOUT), and temperature (Ta) (1) VIN Dependency (a) VOUT pin COUT = 22 F, IOUT = 50 mA 10 A, Ta = 25 C (b) VRO pin CRO = 22 F, IRO = 30 mA 0.12 0.12 0.10 0.10 0.08 0.08 0.06 0.06 0.04 0.04 0.02 0.02 0.00 4 5 6 7 8 9 10 0.00 4 5 VIN (V) 10 A, Ta = 25 C 6 7 8 9 10 VIN (V) Figure 42 Figure 41 Overshoot Undershoot (2) COUT Dependency (a) VOUT pin (b) VRO pin VIN = 6.0 V, IOUT = 50 mA 10 A, Ta = 25 C VIN = 6.0 V, IRO = 30 mA 0.60 0.30 0.50 0.25 0.40 0.20 0.30 0.15 0.20 0.10 0.10 0.05 0.00 0 10 20 30 COUT ( F) Figure 43 40 50 0.00 0 10 10 A, Ta = 25 C 20 30 40 50 CRO ( F) Figure 44 Overshoot Undershoot 22 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 (3) IOUT Dependency IOUT and IRO show the fluctuation between the low current stabilized at 10 example, IOUT = 10 mA means a fluctuation between 10 A and 10 mA. (a) VOUT pin (b) VRO pin CRO = 22 F, VIN = 6.0 V, Ta = 25 C COUT = 22 F, VIN = 6.0 V, Ta = 25 C 0.12 0.12 0.10 0.10 0.08 0.08 0.06 0.06 0.04 0.04 0.02 0.02 0.00 0 10 20 30 40 50 A and the high current. For 60 0.00 0 10 20 30 40 50 60 IRO (mA) IOUT (mA) Figure 46 Figure 45 Overshoot Undershoot (4) Temperature Dependency (a) VOUT pin VIN = 6.0 V, IOUT = 50 mA 10 A, COUT = 22 F (b) VRO pin VIN = 6.0 V, IRO = 30 mA 0.16 0.08 0.14 0.07 0.12 0.06 0.10 0.05 0.08 0.04 0.06 0.03 0.04 0.02 0.02 0.01 0.00 0.00 50 0 50 Ta ( C) Figure 47 100 50 10 A, CRO = 22 F 0 50 100 Ta ( C) Figure 48 Overshoot Undershoot Caution 1. Be sure to add a 10 F or more capacitor to the VOUT and VRO pins. 2. The above connections and values will not guarantee correct operation. Before setting these values, perform sufficient evaluation on the application to be actually used. 23 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 Characteristics (Typical Data) 1. Voltage Regulator Unit (VRO VOUT 5.0 V) 1. 1 Input Voltage (VIN) vs. Output Voltage (VRO) Characteristics (REG1) 85 C (1) Ta (2) Ta 25 C 5.2 5.2 5.0 5.0 4.8 4.8 IRO = 10 mA IRO = 30 mA IRO = 50 mA IRO = 70 mA IRO = 90 mA 4.6 4.4 4.2 4.0 4.0 6.0 5.0 IRO = 10 mA IRO = 30 mA IRO = 50 mA IRO = 70 mA IRO = 90 mA 4.6 4.4 4.2 4.0 4.0 7.0 5.0 VIN [V] (3) Ta 6.0 7.0 VIN [V] 40 C 5.2 5.0 IRO = 10 mA IRO = 30 mA IRO = 50 mA IRO = 70 mA IRO = 90 mA 4.8 4.6 4.4 4.2 4.0 4.0 6.0 5.0 7.0 VIN [V] 1. 2 Input Voltage (VIN) vs. Output Voltage (VOUT) Characteristics (REG2) (1) Ta 85 C (2) Ta 5.2 5.2 5.0 5.0 4.8 4.4 4.2 4.0 4.0 5.0 6.0 4.6 4.4 4.2 4.0 7.0 VIN [V] (3) Ta 5.2 5.0 IOUT = 10 mA IOUT = 30 mA IOUT = 50 mA IOUT = 70 mA IOUT = 90 mA 4.6 4.4 4.2 4.0 4.0 5.0 6.0 VIN [V] 4.0 6.0 5.0 VIN [V] 40 C 4.8 IOUT = 10 mA IOUT = 30 mA IOUT = 50 mA IOUT = 70 mA IOUT = 90 mA 4.8 IOUT = 10 mA IOUT = 30 mA IOUT = 50 mA IOUT = 70 mA IOUT = 90 mA 4.6 24 25 C 7.0 7.0 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 1.0 1.0 0.8 0.8 Ta = 85 C Ta = 25 C Ta = 40 C 0.6 0.4 0.6 Ta = 85 C Ta = 25 C Ta = 40 C 0.4 0.2 0.2 0 0 0 0.04 0.02 0 0.06 5.20 5.10 5.00 0.06 IOUT [A] 5.20 Ta = 40 C Ta = 25 C Ta = 85 C VIN = 6 V 0.04 0.02 IRO [A] 5.10 Ta = 40 C Ta = 25 C Ta = 85 C VIN = 6 V 5.00 4.90 4.90 4.80 4.80 4.70 4.70 1™ 100™ 10m 1 1™ 100™ IRO [A] 10m 1 IOUT [A] 30 30 20 20 10 10 0 0 10 10 20 20 30 30 40 25 0 25 Ta [ C] 50 75 85 30 20 20 15 10 10 0 5 10 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 0 40 25 0 25 Ta [ C] 50 75 85 25 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 40 40 30 30 20 20 10 10 0 0 40 2. 25 0 25 Ta [ C] 50 75 85 25 0 25 Ta [ C] 50 75 85 Voltage Detector 2. 1 CS Voltage Detector ( VDET1 4.5 V) 20 30 Ta = 25 C 25 10 20 0 VIN = 3 V 15 10 10 VIN = 1.7 V 5 20 0 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 10 8 6 4 2 0 26 40 0 1.0 2.0 VDS [V] 3.0 4.0 BATTERY BACKUP SWITCHING IC S-8426A Series Rev.2.0_03 2. 2 RESET Voltage Detector ( VDET2 2.9 V) RESET 20 30 Ta = 25 C 25 10 VIN = 3 V 20 0 15 10 10 VIN = 1.7 V 5 20 0 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 0 1.0 2.0 VDS [V] 3.0 4.0 10 8 6 4 2 0 2. 3 PREEND Voltage Detector ( VDET3 2.1 V) PREEND 30 20 Ta = 25 C 25 10 20 15 0 VIN = 2 V 10 10 5 VIN = 1.7 V 0 20 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 0 1.0 2.0 VDS [V] 3.0 4.0 10 8 6 4 2 0 27 BATTERY BACKUP SWITCHING IC S-8426A Series 3. Rev.2.0_03 Switch Unit 20 20 10 10 0 0 10 10 20 20 40 25 0 25 Ta [ C] 50 75 85 60 60 50 50 50 40 30 30 20 20 10 10 0 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 40 25 0 25 Ta [ C] 50 75 85 0 1 2 3 4 5 VBAT [V] 30 25 20 15 10 5 0 40 4. 25 0 50 75 85 Consumption Current 16 14 12 10 8 6 4 2 0 16 Ta = 85 C Ta = 25 C Ta = 40 C 12 8 4 0 0 28 25 Ta [ C] 2 4 6 8 10 12 14 16 18 VIN [V] Disclaimers (Handling Precautions) 1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and application circuit examples, etc.) is current as of publishing date of this document and is subject to change without notice. 2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of any specific mass-production design. ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein (hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use of the information described herein. 3. ABLIC Inc. is not responsible for damages caused by the incorrect information described herein. 4. Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings, operation voltage range and electrical characteristics, etc. ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the products outside their specified ranges. 5. When using the products, confirm their applications, and the laws and regulations of the region or country where they are used and verify suitability, safety and other factors for the intended use. 6. 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Reproduction or copying of the information from this document or any part of this document described herein for the purpose of disclosing it to a third-party without the express permission of ABLIC Inc. is strictly prohibited. 14. For more details on the information described herein, contact our sales office. 2.2-2018.06 www.ablic.com