View R1225N_4330460.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

PWM/VFM step-down DC/DC Converter
51 6(5,(6
NO. EA-097-0212
OUTLINE
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FEATURES
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APPLICATIONS
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1
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BLOCK DIAGRAM
OSC VIN Start func VOUT
EXT
+
PWM/VFM CONTROL
Amp +
Vref Soft Start
Protection DLY UVLO
Chip Enable
CE
+ -
Vref
GND
SELECTION GUIDE
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PIN CONFIGURATION
SOT-23-6W
6 5 4
VOUT
GND (mark side)
CE
EXT
VIN
DLY
1
2
3
PIN DESCRIPTION
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ABSOLUTE MAXIMUM RATINGS
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ELECTRICAL CHARACTERISTICS
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TYPICAL APPLICATION AND APPLICATION HINTS
L PMOS R1 C1 VIN CE C2 EXT GND VOUT DLY C4 SD + C3 LOAD
CE CONTROL
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How to set the delay time of protection circuit
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L PMOS R1 C1 VIN CE C2 EXT GND VOUT DLY C4 SD + C3 LOAD
CE CONTROL
OPERATION of step-down DC/DC converter and Output Current
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OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS
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R1225N
External Components
1. Inductor 6HOHFW DQ LQGXFWRU WKDW SHDN FXUUHQW GRHV QRW H[FHHG ,/PD[ ,I ODUJHU FXUUHQW WKDQ DOORZDEOH FXUUHQW IORZV PDJ QHWLF VDWXUDWLRQ RFFXUV DQG PDNH WUDQVIRUP HIILFLHQF\ ZRUVH :KHQ WKH ORDG FXUUHQW LV GHILQLWH WKH VPDOOHU YDOXH RI / WKH ODUJHU WKH ULSSOH FXUUHQW 3URYLGHG WKDW WKH DOORZDEOH FXUUHQW LV ODUJH LQ WKDW FDVH DQG '& FXUUHQW LV VPDOO WKHUHIRUH IRU ODUJH RXWSXW FXU UHQW HIILFLHQF\ LV EHWWHU WKDQ XVLQJ DQ LQGXFWRU ZLWK D ODUJH YDOXH RI / DQG YLFH YHUVD 2. Diode 8VH D GLRGH ZLWK ORZ 9) 6FKRWWN\ W\SH LV UHFRPPHQGHG DQG KLJK VZLWFKLQJ VSHHG 5HYHUVH YROWDJH UDWLQJ VKRXOG EH PRUH WKDQ 9,1 DQG FXUUHQW UDWLQJ VKRXOG EH HTXDO RU PRUH WKDQ ,/PD[ 3. Capacitors $V IRU &,1 XVH D FDSDFLWRU ZLWK ORZ (65 (TXLYDOHQW 6HULHV 5HVLVWDQFH DQG D FDSDFLW\ RI DW OHDVW ) IRU VWDEOH RSHUDWLRQ &287 FDQ UHGXFH ULSSOH RI 2XWSXW 9ROWDJH WKHUHIRUH ) RU PRUH YDOXH RI WDQWDOXP W\SH FDSDFLWRU LV UHFRP PHQGHG 4. Lx Transistor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
10
R1225N
TIMING CHART
Case 1. Set VOUT Voltage >2.1V (Set VOUT Voltage>UVLO Voltage)
VIN
VOUT Set Output Voltage UVLO Voltage Input Voltage Rising Time UVLO Reset VOUT Set Output Voltage CE Reset Protection Circuit Delay Time Protection Circuit Delay Time
CE
VOUT Set Output Voltage EXT
Latch Protection VOUT Set Output Voltage VOUT Stable Operation
Latch Protection
Stable Operation
Stable Operation
Soft Start
Soft Start
Soft Start
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11
R1225N
Case 2. Set VOUT Voltage 2.0V (Set VOUT Voltage < UVLO Voltage)
VIN
UVLO Voltage VOUT Set Output Voltage UVLO Reset Input Voltage Rising Time
CE
UVLO Voltage Protection Circuit Delay Time Reset with CE
UVLO Voltage EXT
Latch Protection VOUT Set Output Voltage VOUT Stable Operation Stable Operation Stable Operation
Soft Start
Soft Start
Soft Start
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12
R1225N
TEST CIRCUITS
A) Output Voltage, Oscillator Frequency, CE "H" Input Voltage, CE "L" Input Voltage, Soft-start time
L1 PMOS
Oscilloscope
D1
EXT GND VOUT
VIN DLY CE + -
C2
V
+ -
C1
B) Supply Current 1
C) Standby Current
EXT GND VOUT
VIN DLY CE
A
EXT GND VOUT
VIN DLY CE
A
D) EXT "H" Output Current
E)
EXT "L" Output Current
EXT
VIN DLY CE
EXT
VIN DLY CE
A
GND VOUT
A
GND VOUT
F)
DLY Switch Current
EXT GND VOUT VIN DLY CE
A
13
R1225N
G) CE "H" Input Current, CE "L" Input Current
H) Output Delay Time for Protection Circuit
EXT GND VOUT
VIN DLY CE
Oscilloscope
EXT GND VOUT
VIN DLY CE C3 + -
A
C2
3026 +$70 +LWDFKL 6' & 5%' 5RKP ) 7DQWDOXP 7\SH
/ &'0& 6XPLGD + & ) 7DQWDOXP 7\SH & Q) &HUDPLF 7\SH
TYPICAL CHARACTERISTICS
$OPRVW DOO WKH FKDUDFWHULVWLFV RI 51 VHULHV DUH VDPH DV 51 6HULHV ([FHSW WKH IROORZLQJ FKDUDFWHULVWLFV UHIHU WR WKH GDWDVKHHW RI 51 6HULHV 1) Efficiency vs. Output Current R1225N182A (VIN=3.3V) CDRH127-10uH
100 90 80
R1225N182A (VIN=5.0V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
R1225N182B (VIN=3.3V) CDRH127-10uH
100 90 80
R1225N182B (VIN=5.0V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
14
R1225N
R1225N182C (VIN=3.3V) CDRH127-10uH
100 90 80
R1225N182C (VIN=5.0V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
R1225N182C (VIN=12V) CDRH127-10uH
100 90 80
R1225N182D (VIN=3.3V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
R1225N182D (VIN=5.0V) CDRH127-10uH
100 90 80
R1225N182D (VIN=12V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
15
R1225N
R1225N182J (VIN=3.3V) CDRH127-27uH
100 90 80
R1225N182J (VIN=5.0V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
R1225N182K (VIN=3.3V) CDRH127-27uH
100 90 80
R1225N182K (VIN=5.0V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
R1225N182K (VIN=12V) CDRH127-27uH
100 90 80
R1225N332A (VIN=4.8V) CDRH127-10Uh
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT (mA)
Output Current IOUT (mA)
16
R1225N
R1225N332A (VIN=7.0V) CDRH127-10uH
100 90 80
R1225N332B (VIN=4.8V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332B (VIN=7.0V) CDRH127-10uH
100 90 80
R1225N332C (VIN=4.8V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332C (VIN=12V) CDRH127-10uH
100 90 80
R1225N332C (VIN=15V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
17
R1225N
R1225N332D (VIN=4.8V) CDRH127-10uH
100 90 80
R1225N332D (VIN=12V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332D (VIN=15V) CDRH127-10uH
100 90 80
R1225N332K (VIN=4.8V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332K (VIN=12V) CDRH127-27uH
100 90 80
R1225N332K (VIN=15V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
18
R1225N
R1225N502A (VIN=6.5V) CDRH127-10uH
100 90 80
R1225N502A (VIN=10V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502B (VIN=6.5V) CDRH127-10uH
100 90 80
R1225N502B (VIN=10V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502C (VIN=6.5V) CDRH127-10uH
100 90 80
R1225N502C (VIN=12V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
19
R1225N
R1225N502C (VIN=15V) CDRH127-10uH
100 90 80
R1225N502D (VIN=6.5V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502D (VIN=12V) CDRH127-10uH
100 90 80
R1225N502D (VIN=15V) CDRH127-10uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502J (VIN=6.5V) CDRH127-27uH
100 90 80
R1225N502J (VIN=10V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
20
R1225N
R1225N502K (VIN=6.5V) CDRH127-27uH
100 90 80
R1225N502K (VIN=12V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502K (VIN=15V) CDRH127-27uH
100 90 80
Efficiency (%)
70 60 50 40 30 20 10 0 0.1 1 10 100 1000 10000
Output Current IOUT(mA)
2)
Ripple Voltage vs. Output Current R1225N182A L=10uH
70 70
R1225N182B L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN=3.3V VIN=5.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN=3.3V VIN=5.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
21
R1225N
R1225N182C L=10uH
70 70
R1225N182D L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 3.3V VIN= 5.0V VIN=12.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN= 3.3V VIN= 5.0V VIN=12.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N182J L=27uH
70 70
R1225N182K L=27uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 3.3V VIN= 5.0V VIN=12.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN=3.3V VIN=5.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332A L=10uH
70 70
R1225N332B L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN=4.8V VIN=7.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN=4.8V VIN=7.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
22
R1225N
R1225N332C L=10uH
70 70
R1225N332D L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 4.8V VIN=12.0V VIN=15.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN= 4.8V VIN=12.0V VIN=15.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332J L=27uH
70 70
R1225N332K L=27uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 4.8V VIN=12.0V VIN=15.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN=4.8V VIN=7.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502A L=10uH
70 70
R1225N502B L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 6.5V VIN=10.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN= 6.5V VIN=10.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
23
R1225N
R1225N502C L=10uH
70 70
R1225N502D L=10uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 100 1000 10000 VIN= 6.5V VIN=12.0V VIN=15.0V
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN= 6.5V VIN=12.0V VIN=15.0V
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502J L=27uH
70 70
R1225N502K
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1 10 VIN= 6.5V VIN=12.0V VIN=15.0V
L=27uH
Ripple Voltage Vrpp(mV)
60 50 40 30 20 10 0 0.1 1
VIN= 6.5V VIN=10.0V
10
100
1000
10000
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
3)
Input Voltage vs. Output Voltage R1225N182A L=10uH
2.00 2.00
R1225N182B L=10uH
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 1mA 500mA
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20 1mA 500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
24
R1225N
R1225N182C L=10uH
2.00 2.00
R1225N182D L=10uH
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20 1mA 500mA
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20 1mA 500mA
Input Voltage VIN(V)
Input Voltage VIN(V)
R1225N182J L=27uH
2.00 2.00
R1225N182K L=27uH
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 1mA 500mA
Output Voltage VOUT(V)
1.95 1.90 1.85 1.80 1.75 1.70 1.65 1.60 0 5 10 15 20 1mA 500mA
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1225N332A L=10uH
3.40 3.40
R1225N332B L=10uH
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1mA 500mA
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20 1mA 500mA
0
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
25
R1225N
R1225N332C L=10uH
3.40 3.40
R1225N332D L=10uH
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1mA 500mA
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20 1mA 500mA
0
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
R1225N332J L=27uH
3.40 3.40
R1225N332K L=27uH
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 1mA 500mA
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0 5 10 15 20 1mA 500mA
0
5
10
15
20
Input Voltage VIN(V)
Input Voltage VIN(V)
4)
Output Voltage vs. Output Current R1225N182A L=10uH
1.850 1.850
R1225N182B L=10uH
Output Voltage VOUT(V)
Output Voltage VOUT(V)
1.830 1.810 1.790 1.770 1.750 0.1 VIN=3.3V VIN=5.0V 1 10 100 1000 10000
1.830 1.810 1.790 1.770 1.750 0.1 VIN=3.3V VIN=5.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
26
R1225N
R1225N182C L=10uH
1.850 1.850
R1225N182D L=10uH
Output Voltage VOUT(V)
Output Voltage VOUT(V)
1.830 1.810 1.790 VIN= 3.3V 1.770 1.750 0.1 VIN= 5.0V VIN=12.0V 1 10 100 1000 10000
1.830 1.810 1.790 VIN= 3.3V 1.770 1.750 0.1 VIN= 5.0V VIN=12.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N182J L=27uH
1.850 1.850
R1225N182K L=27uH
Output Voltage VOUT(V)
Output Voltage VOUT(V)
1.830 1.810 1.790 1.770 1.750 0.1 VIN=3.3V VIN=5.0V 1 10 100 1000 10000
1.830 1.810 1.790 VIN= 3.3V 1.770 1.750 0.1 VIN= 5.0V VIN=12.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332A L=10uH
3.40 3.400
R1225N332B L=10uH
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1
Output Voltage VOUT(V)
3.38 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 3.20 0.1
VIN=4.8V VIN=7.0V 1 10 100 1000 10000
VIN=4.8V VIN=7.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
27
R1225N
R1225N332C L=10uH
3.400 3.400
R1225N332D L=10uH
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 VIN= 4.8V VIN=12.0V VIN=15.0V 1 10 100 1000 10000
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 VIN= 4.8V VIN=12.0V VIN=15.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N332J L=27uH
3.400
R1225N332K L=27uH
3.400
Output Voltage VOUT(V)
Output Voltage VOUT(V)
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1
3.380 3.360 3.340 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0.1 VIN= 4.8V VIN=12.0V VIN=15.0V 1 10 100 1000 10000
VIN=4.8V VIN=7.0V 1 10 100 1000 10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502A L=10uH
5.100 5.100
R1225N502B L=10uH
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 VIN= 6.5V VIN=10.0V 1 10 100 1000 10000
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1
VIN= 6.5V VIN=10.0V
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
28
R1225N
R1225N502C L=10uH
5.100 5.100 VIN= 6.5V VIN=12.0V VIN=15.0V
R1225N502D L=10uH
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 VIN= 6.5V VIN=12.0V VIN=15.0V 1 10 100 1000 10000
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
R1225N502J L=27uH
5.100 5.100
R1225N502K L=27uH
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 VIN= 6.5V VIN=12.0V VIN=15.0V
Output Voltage VOUT(V)
5.080 5.060 5.040 5.020 5.000 4.980 4.960 4.940 4.920 4.900 0.1 VIN= 6.5V VIN=10.0V 1 10 100 1000 10000
1
10
100
1000
10000
Output Current IOUT(mA)
Output Current IOUT(mA)
5)
Load Transient Response R1225N332A L=10uH VIN=4.8V
3.50 2000
3.50
R1225N332A L=10uH VIN=4.8V
2000 1600 1400 1200 1000 800 600 400 200 0 0.15
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.05
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0.00
0.05
0.10
Time(sec)
Time(sec)
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
29
R1225N
R1225N332A L=10uH VIN=7V
3.50 2000
R1225N332A L=10uH VIN=7V
3.50 2000 1600 1400 1200 1000 800 600 400 200 0 0.15
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.05
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0.00
0.05
0.10
Time(sec)
Time(sec)
R1225N332B L=10uH VIN=4.8V
3.50 2000
R1225N332B L=10uH VIN=4.8V
3.50 2000 1600 1400 1200 1000 800 600 400 200 0 0.08
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
R1225N332B L=10uH VIN=7V
3.50 2000
R1225N332B L=10uH VIN=7V
3.50 2000 1600 1400 1200 1000 800 600 400 200 0 0.08
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
30
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
R1225N
R1225N332J L=27uH VIN=4.8V
3.50 2000
R1225N332J L=27uH VIN=4.8V
3.50 2000 1600 1400 1200 1000 800 600 400 200 0 0.08
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
R1225N332J L=10uH VIN=7V
3.50 2000
R1225N332J L=27uH VIN=7V
3.50 2000 1600 1400 1200 1000 800 600 400 200 0 0.08
Output Current IOUT(mA)
Output Voltage VOUT(V)
3.30 3.20 3.10 3.00 2.90 2.80 2.70
1600 1400 1200 1000 800 600 400
3.40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -0.04 -0.02
2.60 200 2.50 0 -0.0002 -0.0001 0.0000 0.0001 0.0002 0.0003 0.0004
0
0.02
0.04
0.06
Time(sec)
Time(sec)
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
Output Current IOUT(mA)
3.40
1800
Output Voltage VOUT(V)
3.45
1800
31

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