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LTC3839 Datasheet, PDF (7/50 Pages) Linear Technology – Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller | |||
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC3839
Output Regulation
vs Input Voltage
0.2
VOUT = 0.6V
ILOAD = 5A
VOUT NORMALIZED AT VIN = 15V
0.1
Output Regulation
vs Load Current
0.2
VIN = 15V
VOUT = 0.6V
VOUT NORMALIZED AT ILOAD = 8A
0.1
0
0
â0.1
â0.1
â0.2
0
5 10 15 20 25 30 35 40
VIN (V)
3839 G18
Error Amplifier Transconductance
vs Temperature
1.80
1.75
1.70
1.65
1.60
1.55
1.50
â50 â25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3839 G27
tON(MIN)
vs VOUT
(aVnodlttaOgFeF(MonINS) ENSEâ
Pin)
100
90
tOFF(MIN)
80
70
60
50
tON(MIN)
40
30
20
10 VIN = 38V
RT ADJUSTED FOR fCLKOUT = 2MHz
0
0
1
2
3
4
5
6
VSENSEâ (V)
3839 G24
â0.2
0
4
8
12
16
20
ILOAD (A)
3839 G19
CLKOUT/Switching Frequency
vs Input Voltage
2
1
0
â1 VOUT = 0.6V
ILOAD = 5A
f = 500kHz
FREQUENCY NORMALIZED AT VIN = 15V
â2
0 5 10 15 20 25 30 35 40
VIN (V)
3839 G21
tON(MIN) and tOFF(MIN)
vs Voltage on VIN Pin
100
90
tOFF(MIN)
80
70
60
50
tON(MIN)
40
30
20
10 VOUT = 0.6V
RT ADJUSTED FOR fCLKOUT = 2MHz
0
0 5 10 15 20 25 30
VIN (V)
35 40
3839 G25
Output Regulation
vs Temperature
0.6
VIN = 15V
VOUT = 0.6V
0.4 ILOAD = 0A
VOUT NORMALIZED AT TA = 25°C
0.2
0
â0.2
â0.4
â0.6
â50 â25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3839 G20
CLKOUT/Switching Frequency
vs Temperature
2
VIN = 15V, VOUT = 0.6V
ILOAD = 0A
f = 500kHz
1 FREQUENCY NORMALIZED AT TA = 25°C
0
â1
â2
â50 â25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3839 G23
tON(MIN) and tOFF(MIN)
vs Switching Frequency
100
90
tOFF(MIN)
80
70
60
50
40
30
tON(MIN)
20
10 VIN = 38V
VOUT = 0.6V
0
200 500 800
1100 1400 1700 2000
CLKOUT/SWITCHING FREQUENCY (kHz)
3839 G26
3839fa
7
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