LTC3114-1_15 Datasheet, PDF (5/34 Pages) Linear Technology – 40V, 1A Synchronous Buck-Boost DC/DC Converter with Programmable Output Current

LTC3114-1
TYPICAL PERFORMANCE CHARACTERISTICS (T_A = 25°C unless otherwise specified)
Burst Mode Operation Threshold
vs V_IN
170
160
150
140
130
120
110
100
90
80
70
60
LOAD INCREASING
LOAD DECREASING
50
1
10
40
INPUT VOLTAGE (V)
31141 G07
Average Output Current vs V_OUT
440
420
400
380
360
340
320
300
280
260
240
220
200
180
160
140
120
100
0
V_IN = 12V
R_PROG = 64.7k
10
20
OUTPUT VOLTAGE (V)
31141 G10
Output Voltage Line Regulation
0.3
0.2
0.1
0
–0.1
1
V_OUT = 5V
V_OUT = 12V
10
40
INPUT VOLTAGE (V)
31141 G13
No-Load Input Current
vs V_IN, PWM Mode
20
15
10
V_OUT = 5V
V_OUT = 12V
5
1
10
40
INPUT VOLTAGE (V)
31141 G08
PROG Regulation Voltage
vs Temperature
1.00
0.75 ^{VIN = 12V}
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
–1.50
–1.75
–2.00
–55 –35 –15 5 25 45 65 85 105 125 145
TEMPERATURE (°C)
31141 G11
Combined LDO, PLDO Supply
Current vs V_IN
8.00
V_OUT = 12V
7.75
7.50
7.25
7.00
6.75
6.50
6.25
6.00
1
10
INPUT VOLTAGE (V)
40
31141 G14
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Average Output Current
vs V_IN, R_PROG
760
720
R = 25k
680
640
600
560
520
R = 50k
480
440
400
360
320
280
R = 100k
240
1
10
INPUT VOLTAGE (V)
40
31141 G09
Output Voltage Load Regulation
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
0.1
V_OUT = 5V
V_OUT = 12V
1
10
100
LOAD CURRENT (mA)
1000
31141 G12
Combined LDO, PLDO Supply
Current vs LDO
8.50
V_OUT = 5V
8.00
7.50
7.00
6.50
6.00
5.50
5.00
4.50
4.00
3.50
2.7
3.4
4.1
4.8
5.5
LDO, PLDO VOLTAGE (V)
31141 G15
31141fa
5