S-882Z

Rev.1.2_00 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series The S-882Z Series is a charge pump IC for step-up DC-DC converter startup, which differs from conventional charge pump ICs, in that it uses fully depleted SOI (Silicon on Insulator) technology to enable ultra-low voltage operation. Being capable of stepping up an extremely low input voltage of 0.3 to 0.35 V, this series enables the efficient use of very low energy levels. The stepped up electric power is stored in a startup capacitor, and it is discharged as the startup power of the step-up DC-DC converter when the startup capacitor reaches the discharge start voltage level. Moreover, a built-in shutdown function is also provided, so that when the output voltage of the connected step-up DC-DC converter rises above a given value, the operation is stopped, thereby achieving significant power saving and battery life extension. The S-882Z Series chips come in a small SOT-23-5 package, allowing high-density mounting. Features • Operating input voltage • Current consumption • • • • • • Discharge start voltage Shutdown voltage Oscillation frequency Small package External component Lead-free products 0.3 to 3.0 V During operation : 0.5 mA max. (at VIN = 0.3 V) During shutdown : 0.6 µA max. (at VIN = 0.3 V) 1.8 to 2.4 V (selectable in 0.2 V steps) Discharge start voltage + 0.1 V (fixed) 350 kHz typ. (at VIN = 0.3 V) SOT-23-5 package Startup capacitor (CCPOUT), 1 unit*1 *1. The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the output smoothing capacitor value of the step-up DC-DC converter and the output voltage value. (Refer to Example of Connection with Step-up DC-DC Converter.) Applications • Stepping up from low-voltage power supply such as solar cell and fuel cell • Stepping up internal power supply voltage of RF tag • Intermittent power supply to intermittently operating system Package Package Name SOT-23-5 Package MP005-A Drawing Code Tape MP005-A Reel MP005-A Seiko Instruments Inc. 1 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Block Diagram CCPOUT CPOUT 5 *1 VIN 4 *1 Charge pump circuit COMP1 − + VREF EN− − + COMP2 2 1 M1 *1 OUT CLK signal Oscillation circuit 3 *1 VM VSS *1. Parasitic diode Figure 1 2 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Product Name Structure The discharge start voltage for the S-882Z Series can be selected at the user’s request. Refer to “1. Product Name” for the definition of the product name and “2. Product Name List” for the full product names. 1. Product Name S-882Z xx - M5T1 G Package name (abbreviation) and packing specifications M5T1 : SOT-23-5, tape Discharge start voltage 18 : 1.8 V 20 : 2.0 V 22 : 2.2 V 24 : 2.4 V *1 *1. Refer to the taping specifications at the end of this book. 2. Product Name List Table 1 Discharge Start Voltage 1.8 V ± 0.1 V 2.0 V ± 0.1 V 2.2 V ± 0.1 V 2.4 V ± 0.1 V Remark Shutdown Voltage 1.9 V ± 0.1 V 2.1 V ± 0.1 V 2.3 V ± 0.1 V 2.5 V ± 0.1 V Product Name S-882Z18-M5T1G S-882Z20-M5T1G S-882Z22-M5T1G S-882Z24-M5T1G Contact the SII marketing department for products with discharge start voltage other than those specified above. Seiko Instruments Inc. 3 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Pin Configurations SOT-23-5 Top view 5 4 Table 2 Pin No. Pin Name 1 OUT 2 VSS 3 VM 4 VIN 5 CPOUT Pin Description Output pin (step-up DC-DC converter connection pin) GND pin Step-up DC-DC converter output voltage monitor pin Power supply input pin Startup capacitor connection pin 1 2 3 Figure 2 Absolute Maximum Ratings Table 3 Parameter VIN pin voltage CPOUT pin voltage OUT pin voltage VM pin voltage Power dissipation Symbol VIN VCPOUT VOUT VVM PD Operating ambient temperature Topr Storage temperature Tstg *1. When mounted on board [Mounted board] (1) Board size: 114.3 mm × 76.2 mm × t1.6 mm (2) Board name: JEDEC STANDARD51-7 (Ta = 25°C unless otherwise specified) Absolute Maximum Rating Unit VSS − 0.3 to VSS + 3.3 V VSS − 0.3 to VSS + 3.3 V VSS − 0.3 to VSS + 3.3 V VSS − 0.3 to VSS + 3.3 V 300 (When not mounted on board) mW 600*1 mW −40 to +85 °C −40 to +125 °C 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. 700 Power Dissipation (PD) [mW] 600 500 400 300 200 100 0 0 100 150 50 Ambient Temperature ( Ta) [° C] Figure 3 Power Dissipation of Package (When Mounted on Board) 4 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Electrical Characteristics Table 4 (Ta = 25°C unless otherwise specified) Parameter Discharge start voltage*1 Discharge stop voltage*2 Symbol VCPOUT1 VCPOUT2 VIN = 0.35 V VCPOUT1(S) = 1.8 V VCPOUT1(S) = 2.0 V VCPOUT1(S) = 2.2 V VCPOUT1(S) = 2.4 V Operating input voltage*3 VIN VCPOUT1(S) = 1.8 to 2.4 V, Ta = −40 to +85°C VCPOUT1(S) = 1.8, 2.0 V, Ta = −30 to +60°C Not externally connected, voltage applied to VIN VCPOUT = 1.8 to 2.4 V, IOUT = 3 mA VIN = 0.35 V, CCPOUT = 10 µF Ta = −40 to +85°C VIN = 0.3 V, VCPOUT = 0 V VIN = 0.6 V, VCPOUT = 0 V VIN = 1.0 V, VCPOUT = 0 V VIN = 0.3 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 0.6 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 1.0 V, VCPOUT = 0 V, VVM = 3.0 V VIN = 2.0 V, VCPOUT = 0 V, VVM = 3.0 V Conditions Min. Typ. Max. VCPOUT1(S) + 0.1 VCPOUT1 − 0.33 VCPOUT1 − 0.33 VCPOUT1 − 0.33 VCPOUT1 − 0.33 3.0 3.0 0.3 100 25 ±550 Unit V V V V V V V V Ω Measurement Circuit VCPOUT1(S) VCPOUT1(S) − 0.1 VCPOUT1 − − 0.60 VCPOUT1 − − 0.67 VCPOUT1 − − 0.74 VCPOUT1 − − 0.80 0.35 0.30 − − − − − − − − − − − − − − 1 1 1 1 1 2 2 − Oscillation start VST voltage Discharge RM1 control switch resistance Discharge start tOUT delay time*4 Discharge start ∆VCPOUT1 voltage temperature ∆Ta • VCPOUT1 coefficient ISS Current consumption during operation Current ISSS consumption during shutdown 34 7 ±150 3 2 − s ppm/°C mA mA mA µA µA µA µA VOFF(S) VOFF(S) Shutdown VOFF(S) V 6 VOFF VIN = 0.3 V, VCPOUT = 0 V voltage*5 − 0.1 + 0.1 Shutdown ∆VOFF voltage − ±150 ±550 ppm/°C − Ta = −40 to +85°C temperature ∆Ta • VOFF coefficient Discharge VIN = VCPOUT = 0 V, ILEAK 0.1 7 control switch − − µA *6 VOUT = VVM = 3.0 V leak current VM pin input IVM 1.0 1.9 8 VVM = 3.0 V − µA current Oscillation fOSC 350 kHz VIN = 0.3 V − − − frequency *1. VCPOUT1 : Actual discharge start voltage value, VCPOUT1(S) : Discharge start voltage setting value *2. Voltage at which discharge to the OUT pin stops *3. Input voltage required to start discharge to the OUT pin from the startup capacitor *4. Delay time from when power is input to the VIN pin until the electric charge of the startup capacitor is discharged to the OUT pin *5. VOFF : Actual shutdown voltage value (VM pin voltage value at which shutdown actually occurs) VOFF(S) : Shutdown voltage setting value (VM pin voltage setting value at which shutdown occurs) VOFF(S) is automatically set to VCPOUT1(S) + 0.1 V. *6. Current that flows into the IC from the OUT pin due to the off-leak current of the discharge control switch Caution The voltage that is input to the connected step-up DC-DC converter varies according to the consumption current of the step-up DC-DC converter and the power smoothing capacitor. Set the discharge start voltage based on thorough evaluation including the temperature characteristics under the actual usage conditions. 0.1 0.5 1.2 − − − − 0.5 1.5 3.0 0.6 0.7 0.7 0.8 4 4 4 5 5 5 5 Seiko Instruments Inc. 5 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Measurement Circuits 1. VIN VM 1 µF CPOUT OUT VSS V 1 MΩ 10 µF Figure 4 2. VIN VM 1 µF CPOUT OUT VSS V 1 MΩ 10 µF Figure 5 3. VIN VM CPOUT OUT VSS V IOUT A Figure 6 4. VIN A 1 µF VM CPOUT OUT VSS Figure 7 6 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series 5. VIN A VM CPOUT OUT VSS Figure 8 6. VIN A VM CPOUT OUT VSS Figure 9 7. VIN VM CPOUT OUT VSS A Figure 10 8. VIN A VM CPOUT OUT VSS Figure 11 Seiko Instruments Inc. 7 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Operation 1. Basic Operation : IC with 2.0 V Discharge Start Voltage (1) (2) (3) (4) In the S-882Z Series, when power of 0.3 V or higher is input to the VIN pin, the oscillation circuit starts operation with that power, and the CLK signal is output from the oscillation circuit. The charge pump circuit is driven by this CLK signal, and the power of the VIN pin is converted to the stepped up electric power in the charge pump circuit. The stepped up electric power output from the charge pump circuit is gradually charged to the startup capacitor (CCPOUT) connected to the CPOUT pin and the voltage of the CPOUT pin gradually rises. When the CPOUT pin voltage (VCPOUT) reaches or exceeds the discharge start voltage (VCPOUT1), the output signal of the comparator (COMP1) changes from high level to low. As a result, the discharge control switch (M1), which was off, turns on. When M1 switches on, the step up electric power charged to CCPOUT is discharged from the OUT pin. When VCPOUT declines to the level of the discharge stop voltage (VCPOUT2) as the result of the discharge, M1 switches off, and the discharge is stopped. (5) (6) (7) When the VM pin voltage (VVM) reaches or exceeds the shutdown voltage (VOFF), the output signal (EN−) of the comparator (COMP2) changes from low level to high. As a result, the oscillation circuit stops operation and the shutdown state is entered. (8) When VVM does not reach VOFF or more, the stepped up electric power from the charge pump circuit is recharged to CCPOUT. (Retun to the operation specified in (3).) Caution When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is needed to be charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop voltage (VCPOUT2). In this case, set the condition as follows: Condition: Out pin voltage (VOUT) 2tS • IVDD CCPOUT + CVDD VCPOUT1 > VDDL + 0.2 V CCPOUT > 10CVDD VCPOUT1 : Discharge start voltage value of S-882Z Series (unit : V) CCPOUT : Capacitance value of startup capacitor (unit : µF) CVDD : IVDD : VDDL : tS : Capacitance value of power smoothing capacitor for step-up DC-DC converter (unit : µF) Consumption current value of step-up DC-DC converter (unit : mA) Minimum operation voltage of step-up DC-DC converter (unit : V) Step-up DC-DC converter startup time ≅ Soft start time (unit : ms) 10 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series If the Schottky diode (SD1) has a large reverse current or if a pull-down resistor is added to the OUT pin of the S-882Z Series, add the current value generated from these to the current consumption (IVDD) of the step-up DC-DC converter. Moreover, if a Schottky diode is added between the OUT pin of the S-882Z Series and the power supply pin (VDD pin) of the step-up DC-DC converter, set VCPOUT1 so that it is higher by the amount corresponding to the forward drop voltage (VF) of the added Schottky diode in comparison to the discharge start voltage value (VCPOUT1) obtained with the above described conditional expression. Cautions 1. The S-882Z Series can start up the step-up DC-DC converter more reliably as the discharge start voltage value (VCPOUT1) and the startup capacitor value (CCPOUT) are larger. However, note that the time from when the input power is input until the step-up DC-DC converter starts becomes longer in this case. 2. In the S-882Z Series, CCPOUT can be more lowered as VCPOUT1 is higher, but note that if VCPOUT1 ≥ 2.2 V, the minimum value of the operation input voltage (the minimum input voltage value required for power to be output from the OUT pin of the S-882Z Series) rises from 0.3 V to 0.35 V (refer to Table 6). Table 6 Discharge Start Voltage Value 1.8, 2.0 V 1.8 to 2.4 V Minimum Operation Input Voltage Value 0.3 V 0.35 V Temperature Range −30 to +60°C −40 to +85°C Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Standard Circuit CCPOUT CPOUT VIN S-882Z Series OUT VSS VM Figure 15 Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Seiko Instruments Inc. 11 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Example of Connection with Step-up DC-DC Converter The following are the connection examples based on the set condition. The symbols used in the connection diagram are described in Table 7 below. Table 7 Symbol SD1 CVDD SD2, ROUT R1, R2 1. Description A Schottky diode for preventing a voltage decline in the VDD pin due to output capacitor CL at step-up DC-DC converter startup. The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so that CVDD ≤ CCPOUT × 0.1. A Schottky diode and pull-down resistor to prevent the OUT pin voltage of the S-882Z Series from exceeding the absolute maximum rated voltage. Bleeder resistors to prevent the VM pin voltage of the S-882Z Series from exceeding the absolute maximum rated voltage. VOUT ≤ 3.0 V, CL ≤ CCPOUT × 0.1, no load VIN VOUT CCPOUT CPOUT VIN S-882Z Series VSS VM OUT VIN VDD Step-up DC-DC converter VSS OUT CIN CL Figure 16 2. VOUT ≤ 3.0 V, CL > CCPOUT × 0.1 VIN SD1 CCPOUT CPOUT VIN S-882Z Series VSS VM OUT VIN CVDD VDD Step-up DC-DC converter VSS OUT VOUT CIN CL Figure 17 12 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series 3. VOUT > 3.0 V, CL ≤ CCPOUT × 0.1, no load VIN SD2 CCPOUT CPOUT VIN S-882Z Series VSS VM OUT VIN VDD Step-up DC-DC converter VSS R2 OUT R1 VOUT CIN ROUT CL Figure 18 4. VOUT > 3.0 V, CL > CCPOUT × 0.1 VIN SD1 SD2 CCPOUT CPOUT VIN S-882Z Series VSS VM OUT VIN CVDD VDD Step-up DC-DC converter VSS R2 OUT R1 VOUT CIN ROUT CL Figure 19 Caution The above connection diagram and constant will not guarantee successful operation. thorough evaluation using the actual application to set the constant. Perform Seiko Instruments Inc. 13 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Precautions • If the consumption current (ISSS) during shutdown needs to be kept at 0.8 µA or lower, set the VM pin voltage (VVM) so that conditions (1) and (2) below are satisfied. (1) VVM ≥ VOFF (2) VIN + 1.0 V ≤ VVM ≤ 3.0 V • If the discharge start voltage (VCPOUT1) of this IC is lower than the operating voltage of the step-up DC-DC converter to be started, the step-up DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).) • Select a capacitor with a sufficiently large capacitance for the startup capacitor. In the case of a capacitor with insufficient capacitance, the step-up DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).) • The discharge start delay time (tOUT) is longer according to conditions (1), (2), and (3) below. Also note it is further longer when these conditions are combined. (1) The operating input voltage (VIN) is low. (2) The discharge start voltage (VCPOUT1) is high. (3) The startup capacitor value (CCPOUT) is large. • When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is needed to be charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop voltage (VCPOUT2). In this case, set the condition as follows: Condition: OUT pin voltage (VOUT)< Discharge stop voltage (VCPOUT2) • Note that the operation to restart a step-up DC-DC converter does not start when CPOUT pin voltage (VCPOUT) exceeds the discharge stop voltage (VCPOUT2) even if the power-off state is released. This operation restarts if VCPOUT is lowered than VCPOUT2 by discharge of a start-up capacitor (CCPOUT). • When designing for mass production using an application circuit described herein, the product deviation and temperature characteristics should be taken into consideration. SII shall not bear any responsibility for the products on the circuits described herein. • Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. • SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 14 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Characteristics (Typical Data) 1. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Input Voltage (VIN) 3.0 2.5 2.0 1.5 1.0 0.5 0 VCPOUT1(S) = 1.8 V Ta = 25°C VCPOUT1 VCPOUT2 0 0.5 1.5 1.0 VIN [V] 2.0 3.0 2.5 2.0 1.5 1.0 0.5 0 VCPOUT1, VCPOUT2 [V] VCPOUT1, VCPOUT2 [V] VCPOUT1(S) = 2.4 V Ta = 25°C VCPOUT1 VCPOUT2 0 0.5 1.5 1.0 VIN [V] 2.0 2. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Temperature (Ta) VCPOUT1, VCPOUT2 [V] VCPOUT1, VCPOUT2 [V] 2.0 1.8 1.6 1.4 1.2 1.0 -40 -20 VCPOUT1(S) = 1.8 V VCPOUT1 2.5 2.3 2.1 1.9 1.7 1.5 -40 -20 VCPOUT1(S) = 2.4 V VCPOUT1 VCPOUT2 VCPOUT2 0 20 40 Ta [°C] 60 80 0 20 40 Ta [°C] 60 80 3. Discharge Control Switch Resistance (RM1) vs. CPOUT Pin Voltage (VCPOUT) VCPOUT1(S) = 1.8 V 40 35 RM1 [Ω] Ta = 85°C 30 25 20 Ta = 25°C Ta = −40°C 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 VCPOUT [V] 4. Discharge Start Delay Time (tOUT) vs. Input Voltage (VIN) 8 6 VIN £ 0.6 V CCPOUT = 10 mF Ta = 25°C 1.0 0.8 tOUT [s] 0.6 0.4 0.2 0 VIN ³ 0.6 V CCPOUT = 10 mF Ta = 25°C tOUT [s] 4 2 0 VCPOUT1(S) = 2.4 V VCPOUT1(S) = 2.4 V VCPOUT1(S) = 1.8 V 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 VIN [V] VCPOUT1(S) = 1.8 V 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 VIN [V] Seiko Instruments Inc. 15 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series 5. Discharge Start Delay Time (tOUT) vs. Startup Capacitor Capacitance Value (CCPOUT) 100 80 tOUT [s] 60 40 20 0 0 20 VIN = 0.6 V VIN £ 0.6 V VCPOUT1(S) = 2.0 V Ta = 25°C 10 8 tOUT [s] 6 4 2 0 VIN ³ 0.6 V VCPOUT1(S) = 2.0 V Ta = 25°C VIN = 0.3 V VIN = 0.35 V VIN = 0.4 V VIN = 0.6 V VIN = 1.0 V VIN = 2.0 V 100 80 40 60 80 CCPOUT [mF] 100 0 20 40 60 CCPOUT [mF] 100 80 tOUT [s] 40 20 0 0 60 VIN £ 0.6 V VCPOUT1(S) = 2.4 V Ta = 25°C 10 8 tOUT [s] 6 4 2 0 VIN = 0.6 V VIN ³ 0.6 V VCPOUT1(S) = 2.4 V Ta = 25°C VIN = 0.35 V VIN = 0.4 V VIN = 0.6 V 20 40 60 80 CCPOUT [mF] 100 VIN = 1.0 V VIN = 2.0 V 100 80 0 20 40 60 CCPOUT [mF] 6. Discharge Start Delay Time (tOUT) vs. Temperature (Ta) VIN £ 0.6 V VCPOUT1(S) = 2.0 V CCPOUT = 10 mF 20 15 VIN = 0.3 V VIN = 0.35 V 10 5 0 VIN = 0.4 V 20 40 Ta [°C] VIN = 0.6 V 60 80 -40 -20 0 1.0 0.8 0.6 0.4 0.2 0.0 VIN ³ 0.6 V VCPOUT1(S) = 2.0 V CCPOUT = 10 mF VIN = 0.6 V VIN = 1.0 V -40 -20 tOUT [s] tOUT [s] 0 20 Ta [°C] VIN = 2.0 V 40 60 80 20 15 VIN £ 0.6 V VCPOUT1(S) = 2.4 V CCPOUT = 10 mF VIN = 0.35 V 10 5 0.0 VIN = 0.4 V VIN = 0.6 V 60 80 -40 -20 0 20 40 Ta [°C] 1.0 0.8 0.6 0.4 0.2 0.0 VIN ³ 0.6 V VCPOUT1(S) = 2.4 V CCPOUT = 10 mF VIN = 0.6 V VIN = 1.0 V VIN = 2.0 V -40 -20 tOUT [s] tOUT [s] 0 20 40 Ta [°C] 60 80 16 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series 7. Current Consumption During Operation (ISS) vs. Input Voltage (VIN) 2.0 Ta 1.5 ISS [mA] = -40°C = 25°C Ta Ta 1.0 = 85°C 0.5 0.0 0.0 0.5 1.0 VIN [V] 1.5 2.0 8. Current Consumption During Shutdown (ISSS) vs. Input Voltage (VIN) VVM VCPOUT1(S) 0.4 = 2.0 V = 1.8 V 0.4 0.3 VCPOUT1(S) = 3.0 V V = 1.8 V, 2.0 V, 2.2 V, 2.4 V VM 0.3 µA] ISSS [ 0.2 Ta ISSS [ µA] Ta = 85°C = -40°C Ta = 85°C = -40°C 0.2 Ta 0.1 Ta = 25°C 0.5 0.1 Ta = 25°C 1.0 0.0 0.0 1.0 VIN [V] 1.5 2.0 0.0 0.0 0.5 1.5 2.0 2.5 3.0 VIN [V] 9. Shutdown Voltage (VOFF) vs. Input Voltage (VIN) Ta = 25°C 3.0 2.5 2.0 1.5 1.0 0.5 0.0 VOFF(S) = 2.5 V VOFF [V] VOFF(S) = 1.9 V 0.0 0.5 1.0 1.5 VIN [V] 2.0 10. Shutdown Voltage (VOFF) vs. Temperature (Ta) 3.0 2.5 2.0 1.5 1.0 VOFF(S) = 2.5 V VOFF [V] VOFF(S) = 1.9 V -40 -20 0 20 40 Ta [°C] 60 80 Seiko Instruments Inc. 17 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series 11. Discharge Control Switch Leak Current (ILEAK) vs. Input Voltage (VIN) VVM 0.8 Ta = 2.0 V 0.8 Ta 0.6 Ta 0.4 Ta 0.2 VVM = 3.0 V µA] Ta 0.4 Ta 0.2 ILEAK [ = -40°C ILEAK [ = 25°C µA] 0.6 = 85°C = 85°C = 25°C = -40°C 0.0 0.0 0.5 1.0 1.5 VIN [V] 2.0 2.5 0.0 0.0 0.5 1.0 1.5 2.0 VIN [V] 2.5 3.0 3.5 4.0 12. VM Pin Input Current (IVM) vs. VM Pin Voltage (VVM) VOFF(S) 1.2 Ta 1.0 = 1.9 V 1.2 Ta 1.0 VOFF(S) = 2.5 V = 85°C µA] = 85°C µA] 0.8 0.6 Ta 0.4 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Ta 0.8 0.6 0.4 Ta 0.2 Ta 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 IVM [ = 25°C IVM [ = -40°C = 25°C = -40°C VVM [V] VVM [V] 13. Oscillation Frequency (fOSC) vs. Input Voltage (VIN) Ta = 25°C 4.0 3.5 fOSC [MHz] 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 VIN [V] 18 Seiko Instruments Inc. ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Application Circuit Example Figure 20 shows an application circuit example with targeted values of VIN = 0.3 V, VOUT = 3.0 V, and IOUT = 1 mA. VIN L VOUT SD1 CVDD CONT S-8353D30MC VM VSS VDD VOUT SD2 CCPOUT CPOUT VIN S-882Z Series VSS OUT CIN CL Figure 20 Table 8 Part Name S-882Z Series Step-up DC-DC converter Symbol − − Manufacturer Seiko Instruments Inc. Seiko Instruments Inc. Sumida Corporation Rohm Co., Ltd. − − − − Inductor L Schottky diode SD1, SD2 Startup capacitor CCPOUT Input capacitor CIN Output capacitor CL Power smoothing capacitor CVDD Part No. S-882Z20-M5T1G (Discharge start voltage value setting : 2.0 V) S-8353D30MC (Output voltage setting : 3.0 V) CDRH5D18-101 (100 µH) RB551V-30 10 µF (ceramic type) 47 µF 33 µF (ESR > 50 mΩ) 1 µF (ceramic type) Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Seiko Instruments Inc. 19 ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2_00 S-882Z Series Marking Specifications (1) SOT-23-5 S OT-23-5 Top view 5 4 (1) to (3) : (4) : Product code (Refer to Product Name vs. Product Code.) Lot number (1) (2) (3) (4) 1 2 3 Product Name vs. Product Code Product Name S-882Z18-M5T1G S-882Z20-M5T1G S-882Z22-M5T1G S-882Z24-M5T1G Product Code (1) (2) (3) Q Y A Q Y B Q Y C Q Y D 20 Seiko Instruments Inc. 2.9±0.2 1.9±0.2 5 4 1 2 3 0.16 -0.06 +0.1 0.95±0.1 0.4±0.1 No. MP005-A-P-SD-1.2 TITLE No. SCALE UNIT SOT235-A-PKG Dimensions MP005-A-P-SD-1.2 mm Seiko Instruments Inc. 4.0±0.1(10 pitches:40.0±0.2) +0.1 ø1.5 -0 2.0±0.05 0.25±0.1 ø1.0 -0 +0.2 4.0±0.1 1.4±0.2 3.2±0.2 321 4 5 Feed direction No. MP005-A-C-SD-2.1 TITLE No. SCALE UNIT SOT235-A-Carrier Tape MP005-A-C-SD-2.1 mm Seiko Instruments Inc. 12.5max. Enlarged drawing in the central part ø13±0.2 9.0±0.3 (60°) (60°) No. MP005-A-R-SD-1.1 TITLE No. SCALE UNIT mm SOT235-A-Reel MP005-A-R-SD-1.1 QTY. 3,000 Seiko Instruments Inc. • • • • • • The information described herein is subject to change without notice. Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.