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TIMING CHART VIN UVLO Voltage VOUT Set Output Voltage Input Voltage Rising Time UVLO Reset CE VOUT Set Output Voltage Protection Circuit Delay Time EXT VOUT Set Output Voltage Reset Protection VOUT VOUT Set Output Voltage Stable Operation Stable Operation Stable Operation Soft Start Soft Start Soft Start Soft Start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µwkhqrxwsxwzloowxuqriiwkhqvriw VWDUWRSHUDWLRQVWDUWV$IWHUWKHVRIWVWDUWRSHUDWLRQ(;7VLJQDOZLOOEH /µexwliwkhodujhfxuuhqwlvvwlooiorzlqjdi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µ )XUWKHULIWKH9,1LVORZHUWKDQ89/2YROWDJHWKHFLUFXLWLQVLGHZLOOEHVWRSSHGE\89/2IXQFWLRQ $IWHU WKDW LI 9,1 ULVHV XQWLO ZKHQ WKH 9,1 UHDFKHV 89/2 YROWDJH WKH FLUFXLW LQVLGH NHHSV WKH FRQGLWLRQ RI VSUH VWDQGE\ 7KHQDIWHU9,1EHFRPHVEH\RQGWKH89/2WKUHVKROGVRIWVWDUWRSHUDWLRQVWDUWVZKHQWKHVRIWVWDUWRSHUDWLRQILQ LVKHVWKHRSHUDWLRQEHFRPHVVWDEOH 14
TEST CIRCUITS A) Output Voltage, Oscillator Frequency, CE H Input Voltage, CE L Input Voltage, Soft-start time L1 PMOS Oscilloscope D1 EXT VIN V + - C1 GND VOUT (VFB) CE + - C2 B) Supply Current 1 C) Standby Current EXT VIN A EXT VIN A GND GND VOUT (VFB) CE VOUT (VFB) CE D) EXT H Output Current E) EXT L Output Current EXT VIN EXT VIN A GND A GND VOUT (VFB) CE VOUT (VFB) CE F) CE H Input Current, CE L Input Current G) Output Delay Time for Protection Circuit EXT VIN EXT VIN GND VOUT (VFB) CE A Oscilloscope GND VOUT (VFB) CE + - C2 326 +$7+LWDFKL / &'&6XPLGD + 6' 5%'5RKP & )7DQWDOXP7\SH & )7DQWDOXP7\SH 15
TYPICAL CHARACTERISTICS 1) Output Voltage vs. Output Current (*Note) R1224N182E L=1uH 1.85 1.85 R1224N182F L=1uH 1.83 1.81 1.79 1.77 VIN3.3V VIN5V 1.83 1.81 1.79 1.77 VIN3.3V VIN5V 1.75 1.75 1.85 R1224N182G L=1uH 1.85 R1224N182H L=1uH 1.83 1.81 1.79 1.77 VIN3.3V VIN5V VIN12V 1.75 1.83 1.81 1.79 1.77 VIN3.3V VIN5V VIN12V 1.75 1.85 R1224N182L L=27uH 1.85 R1224N182M L=27uH 1.83 1.81 1.79 1.77 VIN3.3V VIN5V 1.75 1.83 1.81 1.79 1.77 VIN3.3V VIN5V VIN12V 1.75 16
R1224N332E L=1uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 VIN4.8V 3.24 VIN7V 3.22 3.2 R1224N332F L=1uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 VIN4.8V VIN7V 3.2 R1224N332G L=1uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 VIN4.8V VIN12V VIN15V 3.2 R1224N332G (VIN=1V) 3.35 3.34 3.33 3.32 3.31 3.3 R1224N332G (VIN=16V) 3.35 3.34 3.33 3.32 3.31 3.3 R1224N332H L=1uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 VIN4.8V VIN12V VIN15V 3.2 17
R1224N332L L=27uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 VIN4.8V VIN7V 3.2 R1224N332M L=27uH 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 VIN4.8V VIN12V VIN15V 3.2 3.35 R1224N332M (VIN=5V) 3.35 R1224N332M (VIN=1V) 3.34 3.33 3.32 3.31 3.34 3.33 3.32 3.31 3.3 1 2 3 4 5 Output Current lout(a) 3.3 1 2 3 4 5 Output Current lout(a) R1224N332M (VIN=18V) 3.35 3.34 3.33 3.32 3.31 3.3 1 2 3 4 Output Current lout(a) R1224N52E L=1uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN1V 4.9 18
R1224N52F L=1uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN1V 4.9 R1224N52G L=1uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN12V VIN15V 4.9 5.5 R1224N52G (VIN=1V) 5.5 R1224N52G (VIN=16V) 5.4 5.3 5.2 5.1 5.4 5.3 5.2 5.1 5. 5. R1224N52H L=1uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN12V VIN15V 4.9 R1224N52L L=27uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN1V 4.9 19
R1224N52M L=27uH 5.1 5.8 5.6 5.4 5.2 5. 4.98 4.96 4.94 4.92 VIN6.5V VIN12V VIN15V 4.9 2) Efficiency vs. Output Current (*Note) R1224N182F (VIN=3.3V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182F (VIN=5.V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182G (VIN=3.3V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182G (VIN=5.V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 2
R1224N182G (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182H (VIN=3.3V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182H (VIN=5.V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182H (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N182L (VIN=3.3V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N182L (VIN=5.V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 21
R1224N182M (VIN=3.3V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N182M (VIN=5.V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N182M (VIN=12V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N332E (VIN=7.V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332E (VIN=4.8V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332F (VIN=7.V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 22
R1224N332F (VIN=4.8V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332G (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332G (VIN=4.8V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332G (VIN=1V) 1 9 8 7 6 5 4 3 2 1 R1224N332G (VIN=16V) 1 9 8 7 6 5 4 3 2 1 R1224N332G (VIN=15V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 23
R1224N332H (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332H (VIN=4.8V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332H (VIN=15V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N332L (VIN=7.V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N332L (VIN=4.8V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N332M (VIN=12V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 24
R1224N332M (VIN=4.8V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N332M (VIN=5V) 1 98 96 94 92 9 88 86 84 82 8 1 2 3 4 5 Output Current lout(a) R1224N332M (VIN=1V) 1 98 96 94 92 9 88 86 84 82 8 1 2 3 4 5 Output Current lout(a) R1224N332M (VIN=18V) 1 98 96 94 92 9 88 86 84 82 8 1 2 3 4 Output Current lout(a) R1224N332M (VIN=15V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N52E (VIN=6.5V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 25
R1224N52E (VIN=1V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52F (VIN=6.5V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52F (VIN=1V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52G (VIN=1V) 1 9 8 7 6 5 4 3 2 1 R1224N52G (VIN=16V) 1 9 8 7 6 5 4 3 2 1 R1224N52G (VIN=6.5V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 26
R1224N52G (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52G (VIN=15V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52H (VIN=6.5V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52H (VIN=12V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52H (VIN=15V) CDRH127-1uH 1 9 8 7 6 5 4 3 2 1 R1224N52L (VIN=6.5V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 27
R1224N52L (VIN=1V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N52M (VIN=6.5V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N52M (VIN=12V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 R1224N52M (VIN=15V) CDRH127-27uH 1 9 8 7 6 5 4 3 2 1 1RWH 7\SLFDOFKDUDFWHULVWLFVDUHREWDLQHGZLWKXVLQJWKHIROORZLQJFRPSRQHQWV 326,5),5 / &'5+&6XPLGD + & )&HUDPLF7\SH 6' 5%/5RKP & 6$6DQ\R26FRQ )9 & 6&6DQ\R26FRQ )9 5 Ω 28
3) Ripple Voltage vs. Output Current R1224N182E L=1uH 7 7 R1224N182F L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V 7 R1224N182G L=1uH 7 R1224N182H L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V VIN12V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V VIN12V 7 R1224N182L L=27uH 7 R1224N182M L=27uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN3.3V VIN5V VIN12V 29
7 R1224N332E L=1uH 7 R1224N332F L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN4.8V VIN7V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN4.8V VIN7V 7 R1224N332G L=1uH 7 R1224N332H L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN4.8V 6 VIN12V VIN15V Ripple Voltage Vrpp(mV) 5 4 3 2 1 VIN4.8V VIN12V VIN15V 7 R1224N332L L=27uH 7 R1224N332M L=27uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN4.8V VIN7V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN4.8V VIN12V VIN15V 3
7 R1224N52E L=1uH 7 R1224N52F L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN1V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN1V 7 R1224N52G L=1uH 7 R1224N52H L=1uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN12V VIN15V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN12V VIN15V 7 R1224N52L L=27uH 7 R1224N52M L=27uH Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN1V Ripple Voltage Vrpp(mV) 6 5 4 3 2 1 VIN6.5V VIN12V VIN15V 31
4) Output Voltage vs. Input Voltage R1224N182E L=1uH 2. 1.95 1.9 1.85 1.8 1.75 1.7 1mA 1.65 5mA 1.6 5 1 15 2 Input Voltage VIN(V) R1224N182F L=1uH 2. 1.95 1.9 1.85 1.8 1.75 1.7 1mA 1.65 5mA 1.6 5 1 15 2 Input Voltage VIN(V) R1224N182G L=1uH 2. 1.95 1.9 1.85 1.8 1.75 1.7-1mA 1.65-5mA 1.6 5 1 15 2 Input Voltage VIN(V) R1224N182H L=1uH 2. 1.95 1.9 1.85 1.8 1.75 1.7-1mA 1.65-5mA 1.6 5 1 15 2 Input Voltage VIN(V) R1224N182L L=27uH 2. 1.95 1.9 1.85 1.8 1.75 1.7 1mA 1.65 5mA 1.6 5 1 15 2 Input Voltage VIN(V) R1224N182M L=27uH 2. 1.95 1.9 1.85 1.8 1.75 1.7 1mA 1.65 5mA 1.6 5 1 15 2 Input Voltage VIN(V) 32
3.4 3.38 3.36 3.34 R1224N332E L=1uH 3.32 3.3 3.28 3.26 3.24 1mA 5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 3.4 3.38 3.36 3.34 R1224N332F L=1uH 3.32 3.3 3.28 3.26 3.24 1mA 5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 3.4 3.38 3.36 3.34 R1224N332G L=1uH 3.32 3.3 3.28 3.26 3.24-1mA -5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 3.4 3.38 3.36 3.34 R1224N332H L=1uH 3.32 3.3 3.28 3.26 3.24-1mA -5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 3.4 3.38 3.36 3.34 R1224N332L L=27uH 3.32 3.3 3.28 3.26 3.24 1mA 5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 3.4 3.38 3.36 3.34 R1224N332M L=27uH 3.32 3.3 3.28 3.26 3.24 1mA 5mA 3.22 3.2 5 1 15 2 Input Voltage VIN(V) 33
R1224N52E L=1uH 5.2 5.15 5.1 5.5 5. 4.95 4.9 1mA 4.85 5mA 4.8 5 1 15 2 Input Voltage VIN(V) R1224N52F L=1uH 5.2 5.15 5.1 5.5 5. 4.95 4.9 1mA 4.85 5mA 4.8 5 1 15 2 Input Voltage VIN(V) R1224N52G L=1uH 5.2 5.15-1mA -5mA 5.1 5.5 5. 4.95 4.9 4.85 4.8 5 1 15 2 Input Voltage VIN(V) R1224N52H L=1uH 5.2 5.15 5.1 5.5 5. 4.95 4.9-1mA 4.85-5mA 4.8 5 1 15 2 Input Voltage VIN(V) R1224N52L L=27uH 5.2 5.15 5.1 5.5 5. 4.95 4.9 1mA 4.85 5mA 4.8 5 1 15 2 Input Voltage VIN(V) R1224N52M L=27uH 5.2 5.15 5.1 5.5 5. 4.95 4.9 1mA 4.85 5mA 4.8 5 1 15 2 Input Voltage VIN(V) 34
5) Output Voltage vs. Temperature R1224N332E 3.33 1.21 R1224N122F 3.32 3.31 3.3 3.29 3.28 3.27-4 -15 1 35 6 85 Temperature Topt( C) 1.25 1.2 1.195 1.19-4 -15 1 35 6 85 Temperature Topt( C) 6.1 R1224N62L 1.1 R1224N12G 6.5 6. 5.95 1.5 1..995 5.9-4 -15 1 35 6 85 Temperature Topt( C).99-4 -15 1 35 6 85 Temperature Topt( C) 6) Oscillator Frequency vs. Temperature Oscillator Frequency fosc(khz) R1224N12G 36 33 3 27 24-4 -15 1 35 6 85 Temperature Topt( C) Oscillator Frequency fosc(khz) R1224N12H 6 55 5 45 4-4 -15 1 35 6 85 Temperature Topt( C) 35
Oscillator Frequency fosc(khz) R1224N12M 216 198 18 162 144-4 -15 1 35 6 85 Temperature Topt( C) 7) Supply Current vs. Temperature R1224N332E 25 25 R1224N62L Supply Current1 Iss1(µA) 2 15 1 5 Supply Current1 Iss1(µA) 2 15 1 5-4 -15 1 35 6 85 Temperature Topt( C) -4-15 1 35 6 85 Temperature Topt( C) 25 R1224N62F 4 R1224N12G Supply Current1 Iss1(µA) 2 15 1 5 Supply Current1 Iss1(µA) 3 2 1-4 -15 1 35 6 85 Temperature Topt( C) -4-15 1 35 6 85 Temperature Topt( C) 36
6 R1224N12H 4 R1224N12M Supply Current1 Iss1(µA) 5 4 3 2 1 Supply Current1 Iss1(µA) 3 2 1-4 -15 1 35 6 85 Temperature Topt( C) -4-15 1 35 6 85 Temperature Topt( C) 8) Soft-start time vs. Temperature R1224N12G 15 Soft-start time Tsoft(ms) 1 5-4 -15 1 35 6 85 Temperature Topt( C) 9) Delay Time for Protection vs. Temperature Delay Time for Protection Tprot(ms) R1224N332E 3 25 2 15 1-4 -15 1 35 6 85 Temperature Topt( C) 37
1) EXT H Output Current vs. Temperature EXT "H" Output Current IEXTH(mA) R1224N332E -1-15 -2-25 -4-15 1 35 6 85 Temperature Topt( C) 11) EXT L Output Current vs. Temperature EXT "L" Output Current IEXTL(mA) R1224N332E 5 4 3 2-4 -15 1 35 6 85 Temperature Topt( C) 12) Load Transient Response R1224N332G L=1uH VIN=4.8V 3.5 2 3.4 18 3.3 16 3.2 14 3.1 12 3. 1 2.9 8 2.8 6 2.7 4 2.6 2 2.5 - - 1E-4 2E-4 3E-4 4E-4 Time(sec) 3.5 3.45 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.5 R1224N332G L=1uH VIN=4.8V 3. -.4 -.2.2.4.6.8 Time(sec) 2 18 16 14 12 1 8 6 4 2 38
3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332G L=1uH VIN=1V 2.5 -.2 -.1..1.2.3.4 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.45 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.5 R1224N332G L=1uH VIN=1V 3. -.4 -.2.2.4.6.8 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332H L=1uH VIN=4.8V 2.5-2E-4-1E-4 1E-4 2E-4 3E-4 4E-4 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.45 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.5 R1224N332H L=1uH VIN=4.8V 3. -.4 -.2.2.4.6.8 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332H L=1uH VIN=1V 2.5-2E-4-1E-4 1E-4 2E-4 3E-4 4E-4 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332H L=1uH VIN=1V 2.5-2E-4-1E-4.1.2.3.4 Time(sec) 2 18 16 14 12 1 8 6 4 2 39
3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332M L=27uH VIN=4.8V 2.5-2E-4-1E-4.1.2.3.4 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.45 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.5 R1224N332M L=27uH VIN=4.8V 3. -.4 -.2.2.4.6.8 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.4 3.3 3.2 3.1 3. 2.9 2.8 2.7 2.6 R1224N332M L=27uH VIN=1V 2.5-2E-4-1E-4 1E-4 2E-4 3E-4 4E-4 Time(sec) 2 18 16 14 12 1 8 6 4 2 3.5 3.45 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.5 R1224N332M L=27uH VIN=1V 3. -.4 -.2.2.4.6.8 Time(sec) 2 18 16 14 12 1 8 6 4 2 13) UVLO Voltage vs. Temperature 2.2 R1224N332E UVLO Voltage VUVLO(V) 2.15 2.1 2.5 2. 1.95 1.9-4 -15 1 35 6 85 Temperature Topt( C) 4