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| Negative Output Charge Pump Regulator 59[[$ 6(5,(6 NO. EA-076-0204 OUTLINE 7KH 59[[$ 6HULHV DUH &026EDVHG QHJDWLYH RXWSXW FKDUJH SXPS UHJXODWRU ,&V ZKLFK FDQ EH GHYHORSHG DV ORFDO SRZHU VXSSOLHUV IRU SRUWDEOH DSSOLDQFHV DQG VPDOO HOHFWULF DSSOLDQFHV XVHG ZLWK EDWWHULHV ZLWK ORZ VXSSO\ FXUUHQW (DFK RI WKHVH ,&V FRQVLVWV RI DQ RVFLOODWRU D FRQWURO FLUFXLW D UHIHUHQFH YROWDJH XQLW DQ HUURU DPSOLILHU DQG DQ RXW SXW GULYHU FLUFXLW 7KH 59[[$ FDQ HDVLO\ VXSSO\ QHJDWLYH YROWDJH RU UHJXODWHG VHWWLQJ RXWSXW YROWDJH LQ WKH UDQJH IURP 9 WR 9 IURP SRVLWLYH LQSXW YROWDJH 7KH FKLS HQDEOH IXQFWLRQ ZRUNV WR VKXW GRZQ WKH LQWHUQDO FLUFXLW DQG UHGXFHV VXSSO\ FXUUHQW DW WKH VWDQGE\ PRGH WKHUHIRUH WKH 59[[$ LV YHU\ VXLWDEOH IRU WKH DSSOLFDWLRQ VXFK DV SRUWDEOH V\VWHPV WKDW UHTXLUH ORZ VXSSO\ FXU UHQW 6LQFH WKH SDFNDJH IRU WKLV ,& LV 76623 SDFNDJH 7623 LQ (,$- VWDQGDUG KLJK GHQVLW\ PRXQWLQJ RI WKH ,&V RQ ERDUG LV SRVVLEOH FEATURES * 2XWSXW &XUUHQW P$ 0D[ DW 9,1 9 &,1 &3 &287 ) 6HW 2XWSXW 9ROWDJH 9 * 2XWSXW 9ROWDJH $FFXUDF\ 9,1 9 &,1 &3 &287 ) 6HW 2XWSXW 9ROWDJH 9 ,287 P$P$ 9,1 9 &,1 &3 &287 ) 6HW 2XWSXW 9ROWDJH 9 ,287 P$ 9 6HW 2XWSXW 9ROWDJH 9 WR 9 9 6HW 2XWSXW 9ROWDJH 9 WR 9 * 2XWSXW 9ROWDJH 6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH IURP 9 WR 9 LV SRVVLEOH * 5DQJH RI ,QSXW 9ROWDJH 92879 WR 9 WR * &KLS (QDEOH )XQFWLRQ $FWLYH DW / * 3DFNDJH 76623 * 2VFLOODWRU )UHTXHQF\ 7\S N+] APPLICATIONS * 3RZHU VRXUFH IRU 'LVN 'ULYHV * 3RZHU VRXUFH IRU KDQGKHOG FRPPXQLFDWLRQ HTXLSPHQW DQG EDWWHU\SRZHUHG HTXLSPHQW * 3RZHU VRXUFH IRU 3& SHULSKHUDOV DQG $''21 FDUGV * 3RZHU VRXUFH IRU SRUWDEOH DXGLRYLVXDO DSSOLDQFHV VXFK DV FDPHUDV * /RFDO SRZHU VRXUFH IRU VPDOO HOHFWULFDO DSSOLDQFHV 1 R1250VXX1A BLOCK DIAGRAM CP+ 1 SW1 CP3 SW3 SW4 RO 7 VOUT VIN 8 2 GND SW2 OSC RPU CE 4 Vref 6 Vref PIN CONFIGURATION TSSOP8 CP+ GND CPCE 1 2 3 4 8 7 6 5 VIN VOUT Vref NC PACKAGE DIMENSION 1 2 3 4 8 7 6 5 2 R1250VXX1A PIN DESCRIPTION Pin No. Symbol &3 *1' &3 &( 1& 9UHI 9287 9,1 Description &3 &DSDFLWRU IRU &KDUJH 3XPS 3RVLWLYH 3RZHU 6XSSO\ 3LQ *URXQG 3LQ &3 &DSDFLWRU IRU &KDUJH 3XPS 1HJDWLYH 3RZHU 6XSSO\ 3LQ &KLS (QDEOH 3LQ DFWLYH DW / 1R &RQQHFWLRQ 3LQ 2XWSXW 3LQ IRU 5HIHUHQFH 9ROWDJH 2XWSXW 3LQ IRU 1HJDWLYH 5HJXODWRU 3RZHU 6XSSO\ 3LQ 1RWH *Note1 Vref is just a monitoring pin, therefore remain open. Do not connect any load. Refer to Technical Notes. ABSOLUTE MAXIMUM RATINGS *1' 9 Symbol 9,1 9&( 93 9UHI 93 9287 ,287 3' 7RSW 7VWJ Item 9,1 6XSSO\ 9ROWDJH &( 3LQ ,QSXW 9ROWDJH &3 3LQ ,QSXW 9ROWDJH 9UHI 3LQ 9ROWDJH &3 3LQ ,QSXW 9ROWDJH 9287 3LQ 9ROWDJH 2XWSXW &XUUHQW 3RZHU 'LVVLSDWLRQ 1RWH 2SHUDWLQJ 7HPSHUDWXUH 5DQJH 6WRUDJH 7HPSHUDWXUH 5DQJH Rating WR WR 9,1 WR 9,1 WR 9,1 9,1 WR 9,1 WR WR WR Unit 9 9 9 9 9 9 P$ P: & & *Note1: Power dissipation is specified under the specified condition. Conditions; Evaluation Board Dimensions: 50mm x 50mm x 1.6mm Material: Glass Epoxy (FR-4) Reverse side of the evaluation board: Plane Copper Surface of the evaluation board: Land pattern and Wiring 3 R1250VXX1A SELECTION GUIDE 7KH RXWSXW YROWDJH DQG WKH DFWLYH W\SH IRU WKH ,&V FDQ EH VHOHFWHG DW WKH XVHU*V UHTXHVW 7KH VHOHFWLRQ FDQ EH PDGH ZLWK GHVLJQDWLQJ WKH SDUW QXPEHU DV VKRZQ EHORZ 59[[$[[ DEF Code 6HWWLQJ 2XWSXW 9ROWDJH D [[ 7KH DEVROXWH YDOXH RI 2XWSXW 9ROWDJH 6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH RI 9 WR 9 LV SRVVLEOH E F 'HVLJQDWLRQ RI $FWLYH 7\SH RI WKH &KLS (QDEOH &LUFXLW $ IL[HG / DFWLYH W\SH 'HVLJQDWLRQ RI 3DFNLQJ 7\SH ( ( UHHO SFV Contents 4 R1250VXX1A ELECTRICAL CHARACTERISTICS R1250VXX1A Symbol 9,1 Item 2SHUDWLQJ ,QSXW 9ROWDJH 8QOHVV RWKHUZLVH SURYLGHG 9,1 9 7RSW & &3 &287 Conditions 6HW 2XWSXW 9ROWDJH 6HW 2XWSXW 9ROWDJH 9 WR 9 9 WR 9 9 WR 9 ,66 6XSSO\ &XUUHQW 2SHUDWLRQ $FWLYH IRU ,& LWVHOI 1RWH &HUDPLF ) Max. Unit 9 Min. |6HW 9287| Typ. x x x x x x x x 9287 x x x x x x x x 9 P9 P$ N+] N+] & 9 $ P$ 9 WR 9 9 WR 9 9 WR 9 ,67% 6KXWGRZQ &XUUHQW 2SHUDWLRQ 6KXWGRZQ IRU ,& LWVHOI 1RWH 9 WR 9 ,287 P$P$ 9 WR 9 9 WR 9 9 WR 9 ,287 P$ 9 WR 9 9 WR 9 ,287 P$ 9 WR 9 9 WR 9 9UHI 9287 ,287 IRVF IRVF7 'XW\ 96'+ 96'/ 538 52 *Note1 9287 2XWSXW 9ROWDJH 5HIHUHQFH 9ROWDJH /RDG 5HJXODWLRQ 1RWH 1R ORDG ,287 P$ WR P$ 9 WR 9 ,287 P$ WR P$ 9 WR 9 2XWSXW )UHTXHQF\ 2VFLOODWRU )UHTXHQF\ 2VFLOODWRU )UHTXHQF\ 7HPSHUDWXUH &RHIILFLHQW 2VFLOODWRU 'XW\ &\FOH &( + ,QSXW 9ROWDJH &( / ,QSXW 9ROWDJH &( 3XOOXS 5HVLVWDQFH 5HVLVWDQFH EHWZHHQ 9287 DQG *1' Refer to Test Circuit 1. $W QR /RDG 9 9 0 N *Note2: Refer to Test Circuit 6. *Note3: Do not connect ant load. Refer to Technical Notes. *Use Ceramic Capacitors with low ESR. Capacitors with high ESR could have bad effect on the performance of this IC. 5 R1250VXX1A TYPICAL CHARACTERISTICS 1) Supply Current at no load vs. Input Voltage R1250VXX1A 2.500 2) Supply Current at no load vs. Temperature R1250VXX1A 2.5 Supply Current at no load ISS2 (mA) Supply Current at no load ISS2 (mA) -4.0V Output 2.000 -3.0V Output -4.0V Output 2.0 1.500 1.5 1.000 -2.0V Output 0.500 1.0 -2.0V Output 0.5 -3.0V Output 0.000 2.5 3.0 3.5 4.0 4.5 Input Voltage VIN (V) 5.0 5.5 0.0 -50 -25 0 25 50 Temperature Topt (C) 75 100 3) Input Current vs. Output Load Current R1250V301A 120 100 Input Current IIN (mA) 4) Efficiency vs. Load Current R1250VXX1A 100 -4.0V Output 80 80 60 40 20 0 0 20 40 60 80 100 Output Load Current IOUT (mA) 120 Efficiency (%) 60 -2.0V Output 40 -3.0V Output VIN=lOutputl+1V 20 0 0 20 40 60 80 100 120 Output Load Current IOUT (mA) 5) Oscillator Frequency vs. Input Voltage R1250V201A 320 6) Oscillator Frequency vs. Temperature R1250V201A 300 Oscillator Frequency fosc (kHz) Oscillator Frequency fosc (kHz) 310 300 290 280 270 260 250 240 2.5 298 296 294 292 290 288 286 284 282 280 -50 -25 0 25 50 75 100 3 3.5 4 4.5 Input Voltage VIN (V) 5 5.5 Temperature Topt (C) 6 R1250VXX1A 7) Output Voltage vs. Output Load Current R1250V201A -1.9 R1250V201A -1.5 -1.6 85C 50C -1.8 -1.9 VIN=3.0V -2 -2.1 25C Output Voltage VOUT (V) Output Voltage VOUT (V) -1.7 -2 VIN=5.0V 25C 50C 85C -2.1 0 20 40 60 80 100 Output Load Current IOUT (mA) 120 -2.2 0 20 40 60 80 100 Output Load Current IOUT (mA) 120 R1250V301A -2.9 R1250V301A -2.5 -2.6 85C 50C 25C Output Voltage VOUT (V) Output Voltage VOUT (V) -2.7 -2.8 -2.9 -3 -3 VIN=5.0V 25C 50C 85C VIN=4.0V -3.1 -3.1 0 20 40 60 80 100 Output Load Current IOUT (mA) 120 -3.2 0 20 40 60 80 100 Output Load Current IOUT (mA) 120 R1250V301A -3.5 85C -3.6 Output Voltage VOUT (V) -3.7 -3.8 -3.9 -4 -4.1 -4.2 0 50C 25C VIN=5.0V 20 40 60 80 100 Output Voltage Load Current IOUT (mA) 120 7 R1250VXX1A 8) Output Voltage vs. Temperature R1250V201A -1.98 -2.99 -3.00 R1250V301A Output Voltage VOUT (V) -1.99 Output Voltage VOUT (V) -3.01 -3.02 -3.03 -3.03 -2.00 -2.01 -2.02 -50 -25 0 25 50 Temperature Topt (C) 75 100 -3.05 -50 -25 0 25 50 Temperature Topt (C) 75 100 R1250V401A -3.98 -3.99 Output Voltage VOUT (V) -4.00 -4.01 -4.02 -4.03 -4.04 -4.05 -4.06 -50 -25 0 25 50 Temperature Topt (C) 75 100 9) Output Voltage Waveform 8QOHVV RWKHUZLVH SURYLGHG FRQGLWLRQV DUH DV IROORZV 6DPSOH 59$ 9,1 9 &,1 &3 &287 ) -3.00V 100mV 1.00s ,287 P$ %: 0+] 8 R1250VXX1A ,287 P$ -3.00V 100mV 1.00s ,287 P$ -3.00V 100mV 1.00s TEST CIRCUITS 7HVW &LUFXLW 6XSSO\ &XUUHQW 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7HVW &LUFXLW 7\SLFDO &KDUDFWHULVWLFV 7HVW &LUFXLW 6WDQGE\ &XUUHQW 1) Test Circuit 1 ISS-P 1.CP+ 2.GND 3.CP4.CE 8.VIN 7.VOUT 6.Vref 5.NC A Set Output Voltage+0.2V ISS-N A 5.5V 'HILQLWLRQ! ,66 ,663 ,661 (*) To stabilize voltage, a few F bypass capacitors are applied to VOUT pin and VIN pin. 9 R1250VXX1A 2) Test Circuit 2 ISS2 1.CP+ 2.GND 4.7F 3.CP4.CE 6.Vref 5.NC 4.7F 4.7F 8.VIN 7.VOUT A 3) Test Circuit 3 IIN 1.CP+ 2.GND 4.7F 3.CP4.CE 6.Vref 5.NC IOUT 4.7F V 4.7F 8.VIN 7.VOUT A 'HILQLWLRQ! _9287_x,287 9,1x,,1 x 4) Test Circuit 4 1.CP+ 2.GND Oscilloscope 3.CP4.CE 8.VIN 7.VOUT 6.Vref 5.NC (*) To stabilize voltage, a few F bypass capacitor is applied to VIN pin. 10 R1250VXX1A 5) Test Circuit 5 1.CP+ 2.GND 4.7F 3.CP4.CE 6.Vref 5.NC IOUT 4.7F 4.7F 5.0V 8.VIN 7.VOUT IIN A Oscilloscope BW:20MHz 6) Test Circuit 6 1.CP+ 2.GND 3.CP4.CE 8.VIN 7.VOUT 6.Vref 5.NC A 7.5V TYPICAL APPLICATION CIN 4.7F CP+ CP 4.7F GND CPCE VIN Output VOUT Vref NC Open COUT 4.7F (*) Vref pin should not be wired. Refer to Technical Notes. 11 R1250VXX1A OPERATION 1) Basic Operation 7KH 59[[$ 6HULHV PDNH 6: WKURXJK 6: 21 DQG 2)) E\ WKH FORFN JHQHUDWHG E\ LQWHUQDO RVFLOODWRU 26& ZLWK IL[HG IUHTXHQF\ DQG RSHUDWH DV D LQYHUWLQJ FKDUJH SXPS ZLWK WKH FDSDFLWRU &3 DQG WKH FDSDFLWRU &287 7KH 2XWSXW 9ROWDJH LV IHHGEDFN DQG WKH YROWDJH EHWZHHQ WKH 2XWSXW 9ROWDJH DQG 5HIHUHQFH 9ROWDJH 9UHI 9 LV GLYLGHG KDOI DQG LW LV FRPSDUHG ZLWK WKH *1' 6HW 9287 OHYHO 2) Status of Internal Circuits at Standby mode and Standby Current $W 6WDQGE\ PRGH 59 6HULHV NHHS WKH YROWDJH RI &3 DV VKRZQ EHORZ 9 OHYHO E\ DQ LQWHUQDO RSHUDWLRQDO DPSOLILHU 9287 %\ WKLV DFWLRQ WKH LPSHGDQFH RI 6: LV FRQWUROOHG WR FRUUHVSRQG ZLWK LWV ORDG FXUUHQW DQG 2XWSXW 9ROWDJH NHHSV VIN CIN CP RO up to 5k ROUT COUT VOUT R1250VXX1A :KHQ \RX GHVLJQ D V\VWHP ZLWK XVLQJ WKLV ,& FRQVLGHU WKH IROORZLQJ VXEMHFWV ,I YHU\ VPDOO OHDNDJH FXUUHQW ZRXOG EH D FULWLFDO WKH OHDNDJH FXUUHQW RI ERWK &,1 DQG &3 VKRXOG EH FRQVLGHUHG %HFDXVH WKH YROWDJH OHYHO RI &3 NHHSV DV PXFK DV 9'' OHYHO WKH VSHHG IRU VWDUWXS IURP VWDQGE\ PRGH LV IDVWHU WKDQ WKH VWDUWXS E\ SRZHURQ 9287 LV LQWHUQDOO\ SXOOHG GRZQ WKURXJK N WR *1' 7LPH FRQVWDQW RI WUDQVLHQW UHVSRQVH WXUQRII VSHHG RI 9287 FDQ EH FDOFXODWHG DV IROORZV >N@ 5287 x &287 5287 2XWSXW ORDG UHVLVWDQFH /RDG FXUUHQW VKRXOG EH 2)) V\QFKURQRXVO\ ZLWK WKLV ,& LI WKH ORDG LV HOHFWURQLF RU FRQQHFWHG EHWZHHQ 9,1 DQG 9287 ,I VRPH FKDUJH LV FRQWLQXRXVO\ IORZQ WR WKH 2XWSXW 9287 DW WKH 2)) VWDWH WKH YROWDJH OHYHO RI 9287 ZLOO ULVH DQG FRXOG EH EH\RQG 9 $QG LI WKH YROWDJH ZLOO EH WKLV ,& PLJKW EH EUHDN GRZQ 3) Ripple Voltage 5LSSOH YROWDJH RI 2XWSXW ZDYHIRUP FDQ EH URXJKO\ FDOFXODWHG DV IROORZV 9ULSSOH >P9SS@ x ,287 >P$@ &287 >)@ 6XSSO\ &XUUHQW DW QR ORDG >P$@ 6XSSO\ &XUUHQW >P$@ 6XSSO\ &XUUHQW DW QR ORDG >P$@ 2VFLOODWRU )UHTXHQF\ >+]@ 9 WKDW LV GHVLJQDWHG DV DEVROXWH PD[LPXP UDWLQJ 12 R1250VXX1A 4) Power Consumption 3RZHU &RQVXPSWLRQ DW ODUJH ORDG FXUUHQW RI WKLV ,& FDQ EH FDOFXODWHG DV IROORZV :FKLS >P:@ 9,1 >9@_ 6HW 2XWSXW 9ROWDJH _ x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|
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