INTERSIL ICL7663S Guide
Contents
1. 0 10 1071 10 10 102 1k FREQUENCY Hz FIGURE 4 NPUT POWER SUPPLY REJECTION RATIO 5 00 4 75 4 50 4 25 V 15V 4 00 3 75 3 50 3 25 lo uA lt lt 1 3 00 V 2V 2 75 2 50 TEMPERATURE C FIGURE 6 QUIESCENT CURRENT AS A FUNCTION OF TEMPERATURE 5 intersil FN3180 5 July 21 2005 ICL7663S Detailed Description 76635 is a CMOS integrated circuit incorporating all the functions of a voltage regulator plus protection circuitry a single monolithic chip Referring to the Functional Diagram the main blocks are a bandgap type voltage reference an error amplifier and an output driver with both PMOS and NPN pass transistors The bandgap output voltage trimmed to 1 29V 15 for the ICL7663SA and the input voltage at the terminal are compared in amplifier A Error amplifier A drives a P channel pass transistor which is sufficient for low under about 5mA currents The high current output is passed by an NPN bipolar transistor connected as a follower This configuration gives more gain and lower output impedance Logic controlled shutdown is implemented via a N Channel MOS transistor Current sensing is achieved with comparator C which func2. a negative coefficient results in the output voltage See Figure 9 for details Pin will not source current 5 All pins are designed to withstand electrostatic discharge ESD levels in excess of 2000V 6 All significant improvements over the industry standard ICL7663 are highlighted Functional Diagram VouT1 Vour2 SENSE VsET Vic SHUTDOWN GND GND 4 intersil FN3180 5 July 21 2005 ICL7663S Typical Performance Curves 5 000 4 995 4 990 4 985 4 980 4 975 HH 4 970 4 965 4 960 4 955 4 950 Vout V 103 10 2 107 100 10 10 lour mA FIGURE 1 Voyr2 OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT CURRENT 1 6 TA 25 VIN z2V V in Vout V lour2 mA FIGURE 3 Voyt2 INPUT OUTPUT DIFFERENTIAL vs OUTPUT CURRENT lo uA 0 2 4 6 8 10 12 14 16 V in V FIGURE 5 QUIESCENT CURRENT AS A FUNCTION OF INPUT VOLTAGE V in 1 V lour1 mA FIGURE 2 Voyr4 INPUT OUTPUT DIFFERENTIAL vs OUTPUT CURRENT PSRR dB a 10
3. 1 6V to 16V Guaranteed Line and Load Regulation Over Entire Operating Temperature Range Optional 1 Output Voltage Accuracy ICL7663SA Output Voltage Programmable from 1 3V to 16V Improved Temperature Coefficient of Output Voltage 40mA Minimum Output Current with Current Limiting Output Voltages with Programmable Negative Temperature Coefficients Output Shutdown via Current Limit Sensing or External Logic Level Low Input to Output Voltage Differential Improved Direct Replacement for Industry Standard ICL7663B and Other Second Source Products Pb Free Plus Anneal Available ROHS Compliant Applications Low Power Portable Instrumentation Pagers Pinout Handheld Instruments ICL7663S PDIP SOIC LCD Display Modules TOP VIEW Remote Data Loggers sense 7 F8 Vive Battery Powered Systems Vour 2 Vout 3 6 Vser GND 4 5 SHDN 1 CAUTION These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures 1 888 INTERSIL or 1 888 468 3774 Intersil and design is a registered trademark of Intersil Americas Inc Copyright Intersil Americas Inc 1999 2005 All Rights Reserved All other trademarks mentioned are the property of their respective owners ICL7663S Ordering Information TEMP RANGE PKG DWG PART NUMBER C PACKAGE ICL7663SCBA 0 to 70 8Ld SOIC N 8 15 ICL7663SCBAZA 0 to 70 8
4. ICL7663S Generating a Temperature Compensated Display Drive Voltage Temperature has an important effect in the variation of temperature compensated display voltage Vpjsp can be threshold voltage in multiplexed LCD displays As generated using the 76635 This is shown in Figure 11 temperature rises the threshold voltage goes down For for the ICM7233 triplexed LCD display driver applications where the display temperature varies widely a 5V V iN VouT1 LOGIC Vour2 SYSTEM PROCESSOR VsET 7233 GND DATA BUS FIGURE 11 GENERATING A MULTIPLEXED LCD DISPLAY DRIVE VOLTAGE All Intersil U S products are manufactured assembled and tested utilizing 1509000 quality systems Intersil Corporation s quality certifications can be viewed at www intersil com design quality Intersil products are sold by description only Intersil Corporation reserves the right to make changes in circuit design software and or specifications at any time without notice Accordingly the reader is cautioned to verify that data sheets are current before placing orders Information furnished by Intersil is believed to be accurate and reliable However no responsibility is assumed by Intersil or its subsidiaries for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Intersil or its sub
5. rate of rise of the input may be hundreds of volts per microsecond This is potentially harmful to the regulators where internal operating currents are in the nanoampere range The 0 047 uF capacitor on the device side of the switch will limit inputs to a safe level around 2V us Use of this capacitor is suggested in all applications In severe rate of rise cases it may be advisable to use an RC network on the SHutDowN pin to delay output turn on Battery charging surges transients and assorted noise signals should be kept from the regulators by RC filtering zener protection or even fusing CL o 1 4V lt VsupN lt V IN NOTES 7 S4 when closed disables output current limiting 8 Close 52 for Voyt1 open 52 for VouT2 9 IQ quiescent currents measured at GND pin by meter M 10 S3 when ON permits normal operation when OFF shuts down both Voyr4 and Voura FIGURE 7 ICL7663S TEST CIRCUIT Output Voltages The resistor divider Ro R4 is used to scale the reference voltage VsgrT to the desired output using the formula 1 R2 R4 Vsgr Suitable arrangements of these resistors using a potentiometer enables exact values for to be obtained In most applications the potentiometer may be eliminated by using the ICL7663SA ICL7663SA has voltage guaranteed to be 1 29V 15mV and when used with 1 tolerance resistors for Ry and Ro the initial output voltage will be within 2 7 of ideal The
6. Ld SOIC N 8 15 See Note Pb free ICL7663SCPA 0 to 70 8 Ld PDIP E8 3 ICL7663SCPAZ 0 to 70 8 Ld PDIP E8 3 See Note Pb free ICL7663SACBA 0 to 70 8Ld SOIC N M8 15 ICL7663SACBAZA 0 to 70 8Ld SOIC N 8 15 See Note Pb free ICL7663SACPA 0 to 70 8 Ld PDIP E8 3 ICL7663SAIBA 25 to 85 8 Ld SOIC N 8 15 ICL7663SAIBAZA 25 to 85 8Ld SOIC N 8 15 See Note Pb free Add T suffix to part number for tape and reel packaging Pb free PDIPs can be used for through hole wave solder processing only They are not intended for use in Reflow solder processing applications NOTE Intersil Pb free plus anneal products employ special Pb free material sets molding compounds die attach materials and 100 matte tin plate termination finish which are ROHS compliant and compatible with both SnPb and Pb free soldering operations Intersil Pb free products are MSL classified at Pb free peak reflow temperatures that meet or exceed the Pb free requirements of IPC JEDEC J STD 020 2 intersil FN3180 5 July 21 2005 ICL7663S Absolute Maximum Ratings Input Supply Voltage 18V Any Input or Output Voltage Note 1 Terminals 1 2 3 5 6 7 Output Source Current Termitial2 2 nts eal ada id cond oe 50mA Terminal 3 odi wa Bie Ba 25mA Output Sinking Current Terminal sir ek RR ey mec ox aue 10mA Operating Conditions T
7. emperature Range ICL766939G oido itt eb 0 C to 70 C ICL76639 25 C to 85 C Thermal Information Thermal Resistance Typical Note 2 Oya CCIW C W CERDIP Package 115 30 PDIP Package 150 N A Plastic SOIC Package 180 N A Maximum Junction Temperature PDIP 5 48 m eem 150 CERDIP 175 Maximum Storage Temperature Range 65 C to 150 C Maximum Lead Temperature Soldering 10s 300 C SOIC Lead Tips Only Pb free PDIPs can be used for through hole wave solder processing only They are not intended for use in Reflow solder processing applications CAUTION Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied NOTES 1 Connecting any terminal to voltages greater than V y 0 3V or less than GND 0 3V may cause destructive device latch up It is recommended that no inputs from sources operating on external power supplies be applied prior to ICL7663S power up 2 is measured with the component mounted an evaluation PC board in free air Electrical Specifications Specifications Be
8. ical Specifications Specifications Below Applicable to Both ICL7663S and ICL7663SA Unless Otherwise Specified V y 9V Vout 5V TA 25 C Unless Otherwise Specified Notes 4 5 See Test Circuit Figure 7 Continued PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Sense Pin Input Threshold VcL 0 5 V Input Output Saturation RSAT 2V lout1 1mA 170 350 Q Resistance Note 3 Vtin 9V lout1 2MA 50 100 Q Vtin 15V lout1 5mA 35 70 Q Load Regulation AVOUT 1mA lt louT2 lt 20 1 3 Q AlouT lt louT1 lt 5mA 2 10 Q Available Output Current louT2 3V lt Vin lt 16V Vin VouT2 1 5V 40 mA Vour2 Negative Tempco Output Vtc Open Circuit Voltage 0 9 V Note 4 R ITC Maximum Sink Current 0 8 2 0 mA Temperature Coefficient AVTc Open Circuit 2 5 mV C AT Minimum Load Current IL MIN Includes VsgT Divider Ta 25 C 1 0 0 C lt TA lt 70 C 0 2 5 0 25 C lt Ty lt 85 C 0 2 5 0 NOTES 3 This parameter refers to the saturation resistance of the MOS pass transistor The minimum input output voltage differential at low current under 5mA can be determined by multiplying the load current including set resistor current but not quiescent current by this resistance 4 This output has a positive temperature coefficient Using it in combination with the inverting input of the regulator at
9. intersil Data Sheet CMOS Programmable Micropower Positive Voltage Regulator The ICL7663S Super Programmable Micropower Voltage Regulator is a low power high efficiency positive voltage regulator which accepts 1 6V to 16V inputs and provides adjustable outputs from 1 3V to 16V at currents up to 40mA It is a direct replacement for the industry standard ICL7663B offering wider operating voltage and temperature ranges improved output accuracy ICL7663SA better temperature coefficient guaranteed maximum supply current and guaranteed line and load regulation All improvements are highlighted in the electrical characteristics section Critical parameters are guaranteed over the entire commercial and industrial temperature ranges ICL7663S SA programmable output voltage is set by two external resistors The 1 reference accuracy of the ICL7663SA eliminates the need for trimming the output voltage in most applications The ICL76638 is well suited for battery powered supplies featuring quiescent current low Vij to differential output current sensing and logic input level shutdown control In addition the ICL7663S has a negative temperature coefficient output suitable for generating a temperature compensated display drive voltage for LCD displays ICL7663S July 21 2005 FN3180 5 Features Guaranteed 10 Maximum Quiescent Current Over All Temperature Ranges Wider Operating Voltage Range
10. low Applicable to Both ICL7663S and ICL7663SA Unless Otherwise Specified 9V Vout 5V TA 25 C Unless Otherwise Specified Notes 4 5 See Test Circuit Figure 7 PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS Input Voltage 76635 Ta 25 C 1 5 16 0 C lt TA lt 70 C 1 6 16 V 25 C lt TA lt 85 C 1 6 16 V ICL7663SA 0 C lt TA lt 70 C 1 6 16 V 25 C Ty lt 85 C 1 6 16 V Quiescent Current lo 1 4V lt Vout lt 8 5V No Load Vt in 9V 0 C TA lt 70 C 10 25 C lt lt 85 C 10 V in 16V 0 C lt TA lt 70 C 12 uA 25 C lt Ty lt 85 C 12 uA Reference Voltage VSET louT1 1004A Vout VseT ICL7663S Ta 25 C 1 2 1 3 14 V ICL7663SA Ta 25 1 275 1 29 1 305 V Temperature AVSET 0 C lt TA lt 70 C 100 ppm AT 25 lt lt 85 100 ppm Line Regulation AVseT 2V lt Vin lt 15V 0 C lt TA lt 70 C 0 03 VseT AVIN 25 C lt TA lt 85 C 0 03 0 3 IV Input Current ISET 0 C lt TA lt 70 C 0 01 10 nA 25 C lt TA lt 85 C 0 01 10 nA Shutdown Input Current ISHDN 0 01 10 nA Shutdown Input Voltage VSHDN VsHDN HI Both Vout Disabled 1 4 VsHDN LO Both Voyt Enable 0 3 V Sense Pin Input Current ISENSE 0 01 10 nA FN3180 5 3 intersil July 21 2005 ICL7663S Electr
11. low leakage current of the terminal allows R4 and to be tens of megohms for minimum additional quiescent drain current However some load current is required for proper operation so for extremely low drain applications it is necessary to draw at least 1uA This can include the current for and R4 Output voltages up to nearly the Viy supply may be obtained at low load currents while the low limit is the reference voltage The minimum input output differential in each regulator is obtained using the terminal The input output differential increases to 1 5V when using 2 Output Currents Low output currents of less than 5mA are obtained with the least input output differential from the Vour4 terminal connect Voyt2 to Vou Where higher currents are needed use Voyt2 Vour4 should be left open in this case 6 intersil FN3180 5 July 21 2005 ICL7663S High output currents can be obtained only as far as package dissipation allows It is strongly recommended that output current limit sensing be used in such cases Current Limit Sensing The on chip comparator C in the Functional Diagram permits shutdown of the regulator output in the event of excessive current drain As Figure 8 shows a current limiting resistor is placed in series with VouT2 and the SENSE terminal is connected to the load side of When the current through Rc is high enough to produce a voltage drop e
12. or so To prevent the output from responding where this might be a problem a reservoir capacitor across the load is advised The value of this capacitor is chosen so that the regulated output voltage reaches 90 of its final value in 20ms From 4 20107 go t lout 9 9VouT Vour In addition where such a capacitor is used a current limiting resistor is also suggested see Current Limit Sensing Producing Output Voltages with Negative Temperature Coefficients The ICL7663S has an additional output which is 0 9V relative to GND and has a tempco of 2 5mV C By applying this voltage to the inverting input of amplifier A i e the pin output voltages having negative TC may be produced The TC of the output voltage is controlled by the 2 ratio see Figure 9 and its design equations R4 R2 R2 Re EQ 1 1 VseT R4 R EQ 2 TCVour TC in mV C 3 Where Vs_et 1 3V 0 9V 2 5mV C FIGURE 9 GENERATING NEGATIVE TEMPERATURE COEFFICIENTS Applications Boosting Output Current with External Transistor The maximum available output current from the 76635 is 40mA To obtain output currents greater than 40mA an external NPN transistor is used connected as shown in Figure 10 n VouT1 FIGURE 10 BOOSTING OUTPUT CURRENT WITH EXTERNAL TRANSISTOR 7 intersil FN3180 5 July 21 2005
13. qual to Vc 0 5V the voltage feedback is by passed and the regulator output will be limited to this current Therefore when the maximum load current Ij is determined simply divide Vc by to obtain the value for V iy SENSE Vour2 Vouri VsET Ro R4 VOUT VsET 5V VeL 25mA FIGURE 8 POSITIVE REGULATOR WITH CURRENT LIMIT Logic Controllable Shutdown When equipment is not needed continuously e g in remote data acquisition systems it is desirable to eliminate its drain on the system until it is required This usually means switches with their unreliable contacts Instead the 76635 be shut down by a logic signal leaving only under as a drain on the power source Since this pin must not be left open it should be tied to ground if not needed A voltage of less than 0 3V for the 76635 will keep the regulator ON and a voltage level of more than 1 4V but less than V w will turn the outputs OFF If there is a possibility that the control signal could exceed the regulator input the current from this signal should be limited to 100uA maximum by a high value 1MQ series resistor This situation may occur when the logic signal originates from a system powered separately from that of the regulator Additional Circuit Precautions This regulator has poor rejection of voltage fluctuations from AC sources above 10Hz
14. sidiaries For information regarding Intersil Corporation and its products see www intersil com 8 intersil FN3180 5 July 21 2005
15. tions with the Voyt2 terminal The ICL7663S has an output from a buffer amplifier which can be used in combination with amplifier A to generate programmable temperature coefficient output voltages The amplifier reference and comparator circuitry all operate at bias levels well below 14A to achieve extremely low quiescent current This does limit the dynamic response of the circuits however and transients are best dealt with outside the regulator loop Basic Operation ICL7663S is designed to regulate battery voltages in the 5V to 15V region at maximum load currents of about 5mA to 30mA Although intended as low power devices power dissipation limits must be observed For example the power dissipation in the case of a 10V supply regulated down to 2V with a load current of 30mA clearly exceeds the power dissipation rating of the Mini DIP 10 2 30 1073 240mW The circuit of Figure 8 illustrates proper use of the device CMOS devices generally require two precautions every input pin must go somewhere and maximum values of applied voltages and current limits must be rigorously observed Neglecting these precautions may lead to at the least incorrect or nonoperation and at worst destructive device failure To avoid the problem of latchup do not apply inputs to any pins before supply voltage is applied Input Voltages The 76635 accepts working inputs of 1 5V to 16V When power is applied the
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INTERSIL ICL7663S Guide