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LOW NOISE 150mA LDO REGULATOR
51 6(5,(6
NO. EA-058-0204
OUTLINE
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FEATURES
* 8OWUD/RZ 6XSSO\ &XUUHQW 7\S $ * 6WDQGE\ 0RGH 7\S $ * /RZ 'URSRXW 9ROWDJH 7\S 9 ,287 * +LJK 5LSSOH 5HMHFWLRQ 7\S GE I * ([FHOOHQW /LQH 5HJXODWLRQ 7\S 9 * +LJK $FFXUDF\ 2XWSXW 9ROWDJH * 6PDOO 3DFNDJH 627 0LQLPROG * 2XWSXW 9ROWDJH 6WHSZLVH VHWWLQJ ZLWK D VWHS RI 9 LQ WKH UDQJH RI 9 WR 9 LV SRVVLEOH * %XLOWLQ &KLS (QDEOH &LUFXLW 7\SHV $ DFWLYH / % DFWLYH + * 3LQ RXW 6LPLODU WR WKH 7. 7. * /RZ 7HPSHUDWXUH'ULIW &RHIILFLHQW RI 2XWSXW 9ROWDJH 7\S SSP& P$ N+]
APPLICATIONS
* 3RZHU VRXUFH IRU FHOOXODU SKRQHV VXFK DV *60 &'0$ DQG YDULRXV NLQG RI 3&6V * 3RZHU VRXUFH IRU GRPHVWLF DSSOLDQFHV VXFK DV FDPHUDV 9&5V DQG FDPFRUGHUV * 3RZHU VRXUFH IRU EDWWHU\SRZHUHG HTXLSPHQW
1
R1121N
BLOCK DIAGRAM
R1121Nxx1A R1121Nxx1B
3 VDD
1 VOUT
3 VDD
1 VOUT
Vref CE 4 Current Limit GND 2 CE 4
Vref Current Limit GND 2
SELECTION GUIDE
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2
R1121N
PIN CONFIGURATION
SOT-23-5
5 4
NC (mark side) VOUT GND
CE
VDD
1
2
3
PIN DESCRIPTION
Pin No. Symbol 9287 *1' 9''
RU &(
Description 2XWSXW SLQ *URXQG 3LQ ,QSXW 3LQ &KLS (QDEOH 3LQ 1R &RQQHFWLRQ
1&
ABSOLUTE MAXIMUM RATINGS
Symbol 9,1 9&( 9287 ,287 3' 7RSW 7VWJ Item ,QSXW 9ROWDJH ,QSXW 9ROWDJH &( RU &( 3LQ 2XWSXW 9ROWDJH 2XWSXW &XUUHQW 3RZHU 'LVVLSDWLRQ 2SHUDWLQJ 7HPSHUDWXUH 5DQJH 6WRUDJH 7HPSHUDWXUH 5DQJH Rating a 9,1 a 9,1 a a Unit 9 9 9 P$ P: & &
3
R1121N
ELECTRICAL CHARACTERISTICS
* R1121Nxx1A Symbol 9287 ,287 9287,287 9',) ,66 ,VWDQGE\ 92879,1 55 9,1 92877 ,OLP 538 9&(+ 9&(/ HQ Item 2XWSXW 9ROWDJH 2XWSXW &XUUHQW /RDG 5HJXODWLRQ 'URSRXW 9ROWDJH 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6WDQGE\ /LQH 5HJXODWLRQ 5LSSOH 5HMHFWLRQ ,QSXW 9ROWDJH 2XWSXW 9ROWDJH 7HPSHUDWXUH &RHIILFLHQW 6KRUW &XUUHQW /LPLW
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7RSW Conditions 9,1 6HW 9287 9 P$ ,287 P$ 92/7$*( 9,1 6HW 9287 9 P$ ,287 P$ 92/7$*( 9,1 9,1 ,287 I 9,1 6HW 9287 9 9&( P$ N+] 5LSSOH 9SS 6HW 9287 9 ,287 9287 P$ 9 %: +] a N+] & 7RSW & 9,1 6HW 9287 9 Min. 9287 x Typ. Max. 9287 x
& Unit 9
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CE ,QSXW 9ROWDJH / 2XWSXW 1RLVH
4
R1121N
* R1121Nxx1B Symbol 9287 ,287 9287,287 9',) ,66 ,VWDQGE\ 92879,1 55 9,1 92877 ,OLP 53' 9&(+ 9&(/ HQ Item 2XWSXW 9ROWDJH 2XWSXW &XUUHQW /RDG 5HJXODWLRQ 'URSRXW 9ROWDJH 6XSSO\ &XUUHQW 6XSSO\ &XUUHQW 6WDQGE\ /LQH 5HJXODWLRQ 5LSSOH 5HMHFWLRQ ,QSXW 9ROWDJH 2XWSXW 9ROWDJH 7HPSHUDWXUH &RHIILFLHQW 6KRUW &XUUHQW /LPLW &( 3XOOGRZQ 5HVLVWDQFH &( ,QSXW 9ROWDJH + &( ,QSXW 9ROWDJH / 2XWSXW 1RLVH %: +] a N+] ,287 9287 P$ 9 & 7RSW & 9,1 Conditions 6HW 9287 9 P$ ,287 P$ 92/7$*( 9,1 6HW 9287 9 P$ ,287 P$ 92/7$*( 9,1 9,1 9&( ,287 I 9,1 6HW 9287 9 6HW 9287 9 *1' P$ N+] 5LSSOH 9SS 6HW 9287 9 9,1 Min. 9287 x Typ. Max. 9287
7RSW & Unit 9
x
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5
R1121N
* ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE 7RSW Output Current Output Voltage VOUT (V) 9287 9287 9,1 9287 IOUT (mA) Conditions 9 Min. 7RSW Dropout Voltage Output Voltage VOUT (V) Conditions 9287 9287 9287 9287 9287 ,287 P$ VDIF (V) Min. Typ. Max. & &
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OPERATION
R1121Nxx1A R1121Nxx1B
3 VDD
1 VOUT
3 VDD
1 VOUT
R1 Vref CE 4 Current Limit R2 GND CE 4 Vref Current Limit
R1
R2
GND
2
2
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6
R1121N
TEST CIRCUITS
CE
CE 4
4
IN
VDD 3
VOUT R1121Nxx1B Series 1
IN
OUT
VDD 3
VOUT R1121Nxx1B Series 1
OUT
ISS
IOUT
2.2F
2.2F 2 0.1F GND
2 0.1F GND
Standard test Circuit
Supply current Test Circuit
Fig.1 Standard test Circuit
CE 4
Fig.2 Supply Current Test Circuit
CE 4
IN
VDD 3
VOUT R1121Nxx1B Series 1
OUT
IN
IOUT
VDD 3
VOUT R1121Nxx1B Series 1
OUT
P.G
2 GND
2 1F GND I1 I2
Ripple Rejection, Line Transient Response Test Circuit
Load Transient Response Test Circuit
Fig.3 Ripple Rejection, Line Transient Response Test Circuit
Fig.4 Load Transient Response Test Circuit
7
R1121N
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current R1121N181B
Topt = 25C 2.0 1.8 2.8V
R1121N301B
Topt = 25C 3.5 5.0V 3.0
Output Voltage VOUT (V)
Output Voltage VOUT (V)
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
3.8V
4.0V
2.5 2.0 3.5V 1.5 VIN = 3.3V 1.0 0.5 0.0
2.3V
VIN = 2.1V
100
200 300 400 Output Current IOUT (mA)
500
0
100
200 300 400 Output Current IOUT (mA)
500
R1121N401B
Topt = 25C 5.0 4.5
Output Voltage VOUT (V)
6.0 5.0
R1121N501B
Topt = 25C
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 100
6.0V 5.0V 4.5V VIN = 4.3V
Output Voltage VOUT (V)
4.0
7.0V 6.0V 5.5V
4.0 3.0 2.0
VIN = 5.3V 1.0 0.0
200 300 400 Output Current IOUT (mA)
500
0
100
200 300 400 Output Current IOUT (mA)
500
2)
Output Voltage vs. Input Voltage R1121N181B
Topt = 25C 2.0 1.9
Output Voltage VOUT (V)
R1121N301B
Topt = 25C 3.1 IOUT=1mA
Output Voltage VOUT (V)
IOUT = 1mA 1.8 1.7 1.6 1.5 1.4 30mA 1.3 50mA 1.2 1.0 2.0 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
3.0 2.9 2.8 2.7 30mA 2.6 2.5 2.0 50mA 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
8
R1121N
R1121N401B
Topt = 25C 4.5 IOUT = 1mA
OUtput Voltage VOUT (V)
R1121N501B
Topt = 25C 5.5 5.0
4.0
Output Voltage VOUT (V)
IOUT = 1mA 4.5 4.0 3.5 30mA 3.0 50mA 2.5 2.0
3.5 30mA 3.0 50mA 2.5 2.0 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
3.0
4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
3)
Dropout Voltage vs. Output Current R1121N181B
1.20 1.00
Dropout Voltage VDIF (V)
R1121N301B
0.40 0.35
Dropout Voltage VDIF (V)
Topt = 85C 0.30 25C 0.25 0.20 -40C 0.15 0.10 0.05 0.00
Topt = 85C 0.80 0.60 0.40 -40C 0.20 0.00 0 50 100 Output Current IOUT (mA) 150 25C
0
50 100 Output Current IOUT (mA)
150
R1121N401B
0.40 0.35
R1121N501B
0.40 0.35
Dropout Voltage VDIF (V)
Dropout Voltage VDIF (V)
0.30 Topt = 85C 0.25 25C 0.20 0.15 0.10 0.05 0.00 0 50 100 Output Current IOUT (mA) 150 -40C
0.30 Topt = 85C 0.25 0.20 0.15 0.10 0.05 0.00 0 50 100 Output Current IOUT (mA) 150 -40C 25C
9
R1121N
4)
Output Voltage vs. Temperature R1121N181B
1.90 1.88
Output Voltage VOUT (V)
R1121N301B
VIN = 2.8V IOUT = 30mA
3.10 3.08 VIN = 4.0V IOUT = 30mA
1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70 -50 -25 0 25 50 Temperature Topt (C) 75 100
Output Voltage VOUT (V)
1.86
3.06 3.04 3.02 3.00 2.98 2.96 2.94 2.92 2.90 -50 -25 0 25 50 Temperature Topt (C) 75 100
R1121N401B
VIN = 5.0V IOUT = 30mA 4.10 4.08
Output Voltage VOUT (V) Output Voltage VOUT (V)
5.10 5.08 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92
R1121N501B
VIN = 6.0V IOUT = 30mA
4.06 4.04 4.02 4.00 3.98 3.96 3.94 3.92 3.90 -50 -25 0 25 50 Temperature Topt (C) 75 100
4.90 -50
-25
0 25 50 Tempareture Topt (C)
75
100
5)
Supply Current vs. Input Voltage R1121N181B
Topt = 25C 60 50 60 50
Supply Current ISS (A)
R1121N301B
Topt = 25C
Supply Current ISS (A)
40 30 20 10 0 1.0
40 30 20 10 0 1.0
2.0
3.0 4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
2.0
3.0 4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
10
R1121N
R1121N401B
Topt = 25C 60 50 60 50
R1121N501B
Topt = 25C
Supply Current ISS (A)
40 30 20 10 0 1.0
Supply Current ISS (A)
2.0 3.0 4.0 5.0 6.0 Input Voltage VIN (V) 7.0 8.0
40 30 20 10 0 1.0
2.0
3.0 4.0 5.0 6.0 Input Voltage VIN (V)
7.0
8.0
6)
Supply Current vs. Temperature R1121N181B
VIN = 2.8V 50 45 50 45
R1121N301B
VIN = 4.0V
Supply Current ISS (A)
Supply Current ISS (A)
40 35 30 25 20 -50
40 35 30 25 20 -50
0 50 Temperature Topt (C)
100
0 50 Temperature Topt (C)
100
R1121N401B
VIN = 5.0V 50 45 40 35 30 25 20 -50 50 45
R1121N501B
VIN = 6.0V
Supply Current ISS (A)
0 50 Temperature Topt (C) 100
Supply Current ISS (A)
40 35 30 25 20 -50
0 50 Temperature Topt (C)
100
11
R1121N
7)
Dropout Voltage vs. Set Output Voltage R1121Nxx1B
Topt = 25C 1.0 0.9
Dropout Voltage VDIF (V)
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1.0
IOUT = 150mA IOUT = 100mA IOUT = 50mA IOUT = 30mA IOUT = 10mA
2.0 3.0 4.0 Set Output Voltage Vreg (V)
5.0
8)
Ripple Rejection vs. Frequency R1121N181B
VIN = 2.8VDC + 0.5Vp-p COUT = tantal 1.0F 80
80 70
R1121N181B
VIN = 2.8VDC + 0.5Vp-p COUT = tantal 2.2F
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
70 60 50 40 30 20 10 0 0.1 1 10 Frequency f (kHz) 100 IOUT = 50mA IOUT = 1mA IOUT = 30mA
60 50 40 30 20 10 0 0.1 1 10 100 Frequency f (kHz) IOUT = 50mA IOUT= 1mA IOUT = 30mA
R1121N301B
VIN = 4.0VDC + 0.5Vp-p COUT = tantal 1.0F 80
R1121N301B
VIN = 4.0VDC + 0.5Vp-p COUT = tantal 2.2F 80 70
Ripple Rejection RR (dB)
70
Ripple Rejection RR (dB)
60 50 40 30 20 10 0 0.1 1 10 Frequency f (kHz) 100 IOUT = 50mA IOUT = 1mA IOUT = 30mA
60 50 40 30 20 10 0 0.1 1 10 100 Frequency f (kHz) IOUT = 50mA IOUT = 1mA IOUT = 30mA
12
R1121N
R1121N401B
VIN = 5.0VDC + 0.5Vp-p COUT = tantal 1.0F 80
R1121N401B
VIN = 5.0VDC + 0.5Vp-p COUT = tantal 2.2F 80 70
Ripple Rejection RR (dB)
Ripple Rejection RR (dB)
70 60 50 40 30 20 10 0 0.1 1 10 Frequency f (kHz) 100 IOUT = 50mA IOUT= 1mA IOUT = 30mA
60 50 40 30 20 10 0 0.1 1 10 100 Frequency f (kHz) IOUT = 50mA IOUT = 1mA IOUT = 30mA
9)
Ripple Rejection vs. Input Voltage (DC bias) R1121N301B
IOUT = 1mA COUT = 2.2F 80
Ripple Rejection RR (dB) Ripple Rejection RR (dB)
R1121N301B
IOUT = 10mA COUT = 2.2F 80 70 60 50 40 30 20 10 0 3.1 3.2 f = 1kHz f = 10kHz 3.3 3.4 Input Voltage VIN (V) 3.5 f = 400Hz
70 60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 Input Voltage VIN (V) 3.5 f = 1kHz f = 10kHz f = 400Hz
R1121N301B
IOUT = 50mA COUT = 2.2F 80 70
f = 400Hz f = 1kHz f = 10kHz
Ripple Rejection RR (dB)
60 50 40 30 20 10 0 3.1 3.2
3.3 Input Voltage VIN (V)
3.4
3.5
13
R1121N
10) Line Transient Response R1121N301B
IOUT=30mA tr=tf=5 s COUT=Tantalum 1.0F 3.4 6
OUtput Voltage VOUT (V)
Input Voltage 3.2 3.1 3.0 2.9 2.8 0 20 40 60 TIme t (s) 80 100 120 Output Voltage 4 3 2 1 0
R1121N301B
IOUT=30mA tr=tf=5 s COUT=Tantalum 2.2F 3.4 6
Output Voltage VOUT (V)
Input Voltage 3.2 3.1 3.0 2.9 2.8 0 20 40 60 Time t (s) 80 100 120 Output Voltage 4 3 2 1 0
R1121N301B
IOUT=30mA tr=tf=5 s COUT=Tantalum 6.8F 3.4 6
Output Voltage VOUT (V)
Input Voltage 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 20 40 60 Time t (s) 80 100 120 2 1 0 4 3
14
Input Voltage VIN (V)
3.3
5
Input Voltage VIN (V)
3.3
5
Input Voltage VIN (V)
3.3
5
R1121N
11) Load Transient Response R1121N301B
VIN=4V CIN=Tantalum 1F COUT=Tantalum 1.0F 3.4 150 100 Output Current 3.2 3.1 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (s) 14 16 18 20 50 0 Output Voltage -50 -100 -150
Output Voltage VOUT (V)
3.3
R1121N301B
VIN=4V CIN=Tantalum 1F COUT=Tantalum 2.2F 3.4 150 100 Output Current 3.2 3.1 Output Voltage 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (s) 14 16 18 20 -50 -100 -150 50 0
Output Voltage VOUT (V)
3.3
R1121N301B
VIN=4V CIN=Tantalum 1F COUT=Tantalum 6.8F 3.4 150 100 Output Current 3.2 3.1 3.0 2.9 2.8 0 2 4 6 8 10 12 Time t (s) 14 16 18 20 50 0 Output Voltage -50 -100 -150
Output Voltage VOUT (V)
3.3
Output Current IOUT (mA)
Output Current IOUT (mA)
Output Current IOUT (mA)
15
R1121N
TECHNICAL NOTES
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4 CE 1 Ceramic Capacitor ESR Iout Ceramic Capacitor 1F Spectrum S.A. Analyzer
Vout
R1121N301B 3 Vin Vin 2 GND
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Ceramic 1.0F 100.0
100.0
R1121N301B
Ceramic 2.2F
10.0
ESR () ESR ()
10.0
1.0
1.0
0.1 0 50 100 150 Output Current IOUT (mA)
0.1 0 50 100 Output Current IOUT (mA) 150
16
R1121N
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TYPICAL APPLICATION
CE CE
IN
VDD
R1121Nxx1A VOUT
OUT
IN
VDD
R1121Nxx1B VOUT
OUT
Cap.
GND
Cap.
Cap.
GND
Cap.
17

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