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MC34063A View Datasheet(PDF) - Texas Instruments

Part NameMC34063A TI
Texas Instruments TI
Description1.5-A Peak Boost/Buck/Inverting Switching Regulators
MC34063A Datasheet PDF : 30 Pages
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MC33063A, MC34063A
SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015
9.2.3.2 Detailed Design Procedure
CALCULATION
ton/toff
(ton + toff)
toff
ton
CT
Ipk(switch)
RSC
L(min)
CO
Vout
STEP DOWN
Vout + VF
Vin(min) - Vsat - Vout
1
f
ton + toff
ton + 1
toff
(ton + toff )- toff
4 ´10-5 ton
2Iout(max )
0.3
Ipk(switch)
( ) æ
ç
ççè
Vin(min) - Vsat - Vout
Ipk(switch)
ö
÷
÷÷ø
ton(max
)
( ) Ipk(switch) ton + toff
8Vripple(pp)
1.25
æ
çè1
+
R2
R1
ö
÷ø
See Figure 11
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9.2.3.3 Application Performance
TEST
Line regulation
Load regulation
Output ripple
Short-circuit current
Efficiency
Output ripple with optional filter
CONDITIONS
VIN = 15 V to 25 V, IO = 500 mA
VIN = 25 V, IO = 50 mA to 500 mA
VIN = 25 V, IO = 500 mA
VIN = 25 V, RL = 0.1
VIN = 25 V, IO = 500 mA
VIN = 25 V, IO = 500 mA
RESULTS
12 mV ± 0.12%
3 mV ± 0.03%
120 mVPP
1.1 A
83.7%
40 mVPP
16
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