View R5102V_333776.PDF datasheet online --- IC-ON-LINE

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584359#6(5,(6
$33/,&$7,21#0$18$/
NO. EA-072-0006
LDO Regulators with a Watchdog Timer
584359#6(5,(6
OUTLINE
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
FEATURES
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
APPLICATION
* 3RZHU#VRXUFH#IRU#*60
1
R5102V
BLOCK DIAGRAMS
SSOP10
VDD 1 Voltage Regulator2 Voltage Regulator1 Watchdog Timer 10 GND
ROUT2 2
9 CE1
EXT 3
8 CE2
ROUT1 4
7 CTW
SCK 5
6 RESET
PIN CONFIGURATION
10 9 8 7 6
GND CE1 CE2 CTW RESET
PIN DESCRIPTION
Symbol 9'' 52875 (;7 52874 6&. 5(6(7 &7: &(5 &(4 *1' 3RZHU#6XSSO\#3LQ 2XWSXW#3LQ#IRU#9ROWDJH#5HJXODWRU#5 'ULYHU#3LQ#IRU#([WHUQDO#7UDQVLVWRU 2XWSXW#3LQ#IRU#9ROWDJH#5HJXODWRU#4 &ORFN#,QSXW#3LQ 2XWSXW#3LQ#IRU#5HVHW#VLJQDO#RI#:DWFKGRJ#WLPHU ([WHUQDO#&DSDFLWRU#3LQ#IRU#:DWFKGRJ#7LPHU &RQWURO#6ZLWFK#3LQ#IRU#9ROWDJH#5HJXODWRU#5#+/#$FWLYH, &RQWURO#6ZLWFK#3LQ#IRU#9ROWDJH#5HJXODWRU#4#+/#$FWLYH, *URXQG#3LQ Description
2
VDD ROUT2 EXT ROUT1 SCK
12345
R5102V
ABSOLUTE MAXIMUM RATINGS
7RSW 58&/#966 39 Symbol 9,1 9&(4 9&(5 96&. 52874 52875 9&7: 95(6(7 (;7 ,2875 ,(;7 3' 7RSW 7VWJ (;7#2XWSXW#9ROWDJH 2XWSXW#&XUUHQW5 (;7#&XUUHQW 3RZHU#'LVVLSDWLRQ 2SHUDWLQJ#7HPSHUDWXUH#5DQJH 6WRUDJH#7HPSHUDWXUH#5DQJH 2XWSXW#9ROWDJH ,QSXW#9ROWDJH Item ,QSXW#9ROWDJH 9ROWDJH#RI# &(4 #3LQ 9ROWDJH#RI# &(5 #3LQ 9ROWDJH#RI#96&.#3LQ 9ROWDJH#RI#52874#3LQ 9ROWDJH#RI#52875#3LQ 9ROWDJH#RI#&7:#3LQ 9ROWDJH#RI# 5(6(7 #3LQ Input Voltage Rating < 9660316#WR#9,1.316 9660316#WR#9,1.316 9660316#WR#9,1.316 9660316#WR#9,1.316 9660316#WR#9,1.316 9660316#WR#9,1.316 9660316#WR#< 9660316#WR9,1.316 483 83 633 073#WR#.;8 088#WR#.458 9 9 9 P$ P$ P: & & Unit 9 9 9 9 9
3
R5102V
ELECTRICAL CHARACTERISTICS
* Overall Symbol 9,1 ,664 583 9&(+ 9&(/ * VR1 Symbol 9287 ,287 ,(;7 Item 2XWSXW#9ROWDJH 2XWSXW#&XUUHQW (;7#&XUUHQW Conditions 9,109287 4139#,287 83P$ 9,109287 4139 9,1 7139 /#9(;7 5139 9,109287 4139 4P$#,287433P$ ,287 433P$ 9&(4 39#9,1 9&(5 7159 9,1 9&( ;139 3134 314 5; 314 8 MIN. 51:77 TYP. 51;33 4-127( < 48 93 315 89 413 318 ,287 83P$ 9287.31899,1;9 I 4N+]/#5LSSOH#3189S0S 9,109287 4139 3 3138 93 ; %DVH#&XUUHQW/#,%/#RI#([WHUQDO 313#7U1 ,287 43P$#073&7RSW;8& 8 433 48 3153 Item ,QSXW#9ROWDJH 6XSSO\#&XUUHQW &( #3XOO0XS#5HVLVWDQFH &( #,QSXW#9ROWDJH#+ &( #,QSXW#9ROWDJH#/ 9,1 7159 /#9&(4 9&(5 39 518 418 3 63 8 Conditions MIN. TYP. ; 93 43 9,1 3158 7RSW 58& MAX. Unit 9 --$ 0 9 9 7RSW 58& MAX. 51;89 Unit 9 $ P$ P9 9 --$ --$ --$ (29 G% 9 P$ SSP2 &
92872,287 /RDG#5HJXODWLRQ 9',) ,66 ,67$1'%< ,(;7/($. 928729,1 55 9(;7 ,/,0 928727 'URSRXW#9ROWDJH 6XSSO\#&XUUHQW 6WDQGE\#&XUUHQW (;7#/HDNDJH#&XUUHQW /LQH#5HJXODWLRQ 5LSSOH#5HMHFWLRQ#5DWH (;7#2XWSXW#9ROWDJH &XUUHQW#/LPLW 2XWSXW#9ROWDJH#7HPSHUDWXUH &RHIILFLHQW
*NOTE Output Current depends on the external PNP transistor. Use a low saturation transistor with hFE range of 100 to 300.
4
R5102V
* VR2 Symbol 9287 ,287 Item 2XWSXW#9ROWDJH 2XWSXW#&XUUHQW Conditions 9,109287 4139#,287 43P$ 9,109287 4139 9,109287 4139 4P$,28783P$ ,287 4P$ 9&(5 39#9,1 9&(4 7159 9,1 9&( ;139 ,287 63P$ 9287.31899,1;9 I 4N+]/#5LSSOH#3189S0S 9,109287 4139 ,287 43P$#073&7RSW;8& 3134 3 MIN. 61567 63 53 53 8 314 3138 73 433 63 63 43 413 3153 TYP. 61633
7RSW 58& MAX. 61699 Unit 9 P$ P9 P9 --$ --$ (29 G% SSP2 & 7RSW 58& Item 6XSSO\#&XUUHQW 0RQLWRULQJ#7LPH#3HULRG#RI :'7 5HVHW#+ROG#7LPH#RI#:'7 6&.#+#,QSXW#9ROWDJH 6&.#/#,QSXW#9ROWDJH &7:#2XWSXW#&XUUHQW 5(6(7 #2XWSXW#&XUUHQW 5(6(7 #/HDNDJH#&XUUHQW 5(6(7 #0LQLPXP#2SHUDWLQJ 9ROWDJH 52874#+#2XWSXW#9ROWDJH 52874#/#2XWSXW#9ROWDJH 6&.#,QSXW#3XOVH#:LGWK 418 3 833 Conditions 9,1 9&(4 9&(5 7159 & 319;--) & 319;--) 9,1 8139 9,1 8139 9,1 4189/#9'6 3189 9,1 4189 /9'6 3189 9,1 9'6 ;9 31; 8 318 52874 x31; 3 4 4 5 5 4 418 9,1 3158 MIN. TYP. 6 MAX. 9 43 413 9,1 52874 x314 Unit --$ V V 9 P9 P$ P$ --$ 9 9 9 QV
92872,287 /RDG#5HJXODWLRQ 9',) ,66 ,67$1'%< 928729,1 55 928727 'URSRXW#9ROWDJH 6XSSO\#&XUUHQW 6WDQGE\#&XUUHQW /LQH#5HJXODWLRQ 5LSSOH#5HMHFWLRQ#5DWH 2XWSXW#9ROWDJH#7HPSHUDWXUH &RHIILFLHQW
* WDT Symbol ,66 7:' 7:5 9,+6&. 9,/6&. ,&7: ,5(6(7 ,5/($. 967$57 9&(+ 9&(/ 76&.:
5
R5102V
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current VR1 R5102V001A
VIN=3.8V 3.0
3.5 3.0
(Topt=25C) VR2 R5102V001A
VIN=4.3V -40C
2.9
Output Voltage2 VOUT2 (V)
Output Voltage VOUT1 (V)
2.5 2.0 1.5 1.0 0.5
85C 25C
2.8
2.7
2.6 0 100 200 300 400 Output Current IOUT1 (mA) 300
0.0 0 50 100 150 200 250 Output Curren2 IOUT2 (mA) 300
2)
Output Voltage vs. Input Voltage VR1 R5102V001A
3.0
3.5
(Topt=25C) VR2 R5102V001A
Output Voltage VOUT1 (V)
Output Voltage VOUT2 (V)
2.9 1mA 2.8 100mA 2.7 10mA 2.6 2.0
3.4 IOUT=0mA 3.3 30mA 10mA 3.2
2.5
3.0
3.5 4.0 4.5 5.0 Input Voltage VIN (V)
5.5
6.0
3.1 3.0
3.5
4.0 4.5 5.0 Input Voltage VIN (V)
5.5
6.0
3)
Dropout Voltage vs. Output Current VR1 R5102V001A
VSET1=2.8V 0.50
Dropout Voltage1 VDIF1 (V)
VR2 R5102V001A
VSET2=3.3V 1.0
Dropout Voltage2 VDIF2 (V)
0.40
0.8
0.30 85C 0.20
0.6 85C 0.4 25C
0.10 25C 0.00 0 100 200 300 400 Output Current1 IOUT1 (mA)
-40C
0.2 -40C 0.0
500
0
10 20 30 40 Output Current2 IOUT2 (mA)
50
6
R5102V
4)
Output Voltage vs. Temperature VR1 R5102V001A
VDD=3.8V, IOUT1=10mA 2.90
VR2 R5102V001A
VDD=4.3V, IOUT1=10mA 3.40
Output Voltage2 VOUT2 (V)
-25 0 25 50 Temperature Topt (C) 75 100
Output Voltage1 VOUT1 (V)
2.85
3.35
2.80
3.30
2.75
3.25
2.70 -50
3.20 -50
-25
0 25 50 Temperature Topt (C)
75
100
5)
Supply Current1 vs. Input Voltage R5102V001A
Topt=25(C) 60 50 40 30 20 10 0 0 1 2 3 4 Input Voltage VIN (V) 5 6
6)
Supply Current2 vs. Input Voltage R5102V001A
Topt=25(C) 60 50 40 30 20 10 0 0 1 2 3 4 Input Voltage VIN (V) 5 6
7)
Supply Current3 vs. Input Voltage R5102V001A
Topt=25(C) 10 9
Supply Current1 ISS1 (A)
8)
Supply Current4 vs. Input Voltage R5102V001A
Topt=25(C) 6 5 4 3 2 1 0
Supply Current1 ISS1 (A)
7 6 5 4 3 2 1 0 0 1 2 3 4 Input Voltage VIN (V) 5 6
Supply Current1 ISS1 (A)
8
Supply Current1 ISS1 (A)
0
1
2 3 4 Input Voltage VIN (V)
5
6
7
R5102V
9)
Supply Current1 vs. Temperature R5102V001A
VDD=4.2V,VCE1/=VCE2/=0V 60
10) Supply Current2 vs. Temperature R5102V001A
VDD=VCE2/=4.2V,VCE1/=0V 60 50 40 30 20 10 0 -50
Supply Current1 (4.2V) ISS12 (A)
40 30 20 10 0 -50
Supply Current2 ISS2 (A)
50
-25
0 25 50 Temperature Topt (C)
75
100
-25
0 25 50 Temperature Topt (C)
75
100
11) Supply Current3 vs. Temperature R5102V001A
VDD=VCE1/=4.2V,VCE2/=0V 10 9
Supply Current3 ISS3 (A)
12) Supply Current4 vs. Temperature R5102V001A
6 5 4 3 2 1 0 -50 VDD=VCE1/=4.2V,VCE2/=0V
7 6 5 4 3 2 1 0 -50 -25 0 25 50 Temperature Topt (C) 75 100
Supply Current4 ISS4 (A)
8
-25
0 25 50 Temperature Topt (C)
75
100
13) Ripple Rejection vs. Frequency VR1 R5102V001A
VIN=3.8VDC+0.5VPP,IOUT1=50mA CL=4.7F 80 70 80 70
VR2 R5102V001A
VIN=4.3VDC+0.5VPP,IOUT2=10mA CL=1.0F
Ripple Rejection RR1(dB)
60 50 40 30 20 10 0 0.01 0.1 1 Frequency f(kHz) 10
Ripple Rejection RR2(dB)
60 50 40 30 20 10 0 0.01 0.1 1 Frequency f(kHz) 10
8
R5102V
14) WDT Reset and Watchdog Timeout Periods vs. External Capacitance (Topt=25C) R5102V001A
Watchdog/Reset Timeout Periods twd,twr (ms)
1E+5 1E+4 1E+3 1E+2 1E+1 1E+0 1E-1 1E-4 twd
twr
1E-3 1E-2 1E-1 CTWExternal Capacitance (F)
1E-0
9
R5102V
TIMING DIAGRAM
VDD Vstart
ROUT1
VCE1
TWD TWR Vref2H VCTW Vref2L
TSCKW VSCK
VRESET
123
4
4
5
6
5
6
4
4
7
8
4
4
4
9
10
R5102V
OPERATION
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11
R5102V
APPLICATION NOTES
Phase Compensation 3KDVH# FRPSHQVDWLRQ# RI# 954# LV# PDGH# E\# H[WHUQDO# FDSDFLWRU# WR# EH# VWDEOH# RSHUDWLRQ# XQGHU# YDULDEOH# RXWSXW# FXUUHQW1 7KHUHIRUH/#XVH#D#WDQWDOXP#FDSDFLWRU/#&//#ZLWK#D#YDOXH#DV#PXFK#DV#43--)#RU#PRUH#LQ#DQ\#FDVH1 ,I#WKH#YDOXH#RI#(65#ZLWK#WKH#FDSDFLWRU#LV#ODUJH/#ORRS#RVFLOODWLRQ#PLJKW#EH#RFFXUUHG#WR#WKH#RXWSXW1#7R#DYRLG#WKH#FDVH/ FDUHIXO#HYDOXDWLRQ#LQFOXGLQJ#WKH#IUHTXHQF\#FKDUDFWHULVWLFV#LV#UHTXLUHG1 External PNP Transistor :KHQ#\RX#FKRRVH#WKH#H[WHUQDO#WUDQVLVWRU/#EDVLFDOO\#FRQVLGHU#RI#RXWSXW#FXUUHQW/#LQSXW#YROWDJH/#DQG#SRZHU#GLVVLSDWLRQ1 *HQHUDOO\/#WKH#WUDQVLVWRU#ZLWK#ORZ#9&(+6$7,#DQG#K)(#YDOXH#RI#ZKLFK#LV#LQ#WKH#UDQJH#RI#433#WR#633/#LV#DSSURSULDWH1 Mounting on Board 0DNH#WKH#LPSHGDQFH#EHWZHHQ#9''#DQG#*1'#PLQLPL]H/#RWKHUZLVH#ZKHQ#D#ODUJH#FXUUHQW#IORZV/#LW#ZRXOG#EH#D#FDXVH#RI PDNLQJ#QRLVH#DQG#XQVWDEOH#RSHUDWLRQ1#$QG#XVH#D#E\SDVV#FDSDFLWRU#ZLWK#D#YDOXH#DV#PXFK#DV#43--)#EHWZHHQ#9''#SLQ#DQG *1'#SLQ#DQG#PDNH#LWV#ZLULQJ#VKRUW#DV#SRVVLEOH1
TYPICAL APPLICATION
VDD 1 Voltage Regulator2 Voltage Regulator1 Watchdog Timer 10 GND
ROUT2 2
9 CE1
EXT 3
8 CE2
ROUT1 4
7 CTW
SCK 5
6 RESET
12

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