LTC3802_15 Datasheet, PDF (5/28 Pages) Linear Technology – Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3802
Efficiency vs I_OUT
100
95
Burst Mode
OPERATION
90
85
80
75
CONTINUOUS
MODE
70
65
60
55
50
45
40
0.1
V_IN = 12V
V_OUT = 3.3V
T_A = 25°C
CIRCUIT ON THE FIRST PAGE
OF THIS DATA SHEET
1
10
100
I_OUT (A)
3802 G01
Efficiency vs V_IN
100
T_A = 25°C
98 CIRCUIT ON THE FIRST PAGE
OF THIS DATA SHEET
96
94
V_OUT = 2.5V
92
I_OUT = 5A
90
V_OUT = 2.5V
I_OUT = 10A
88
86
84
82
80
0 5 10 15 20
V_IN (V)
25 30
3802 G02
Load Regulation
2.5125
0.5
V_IN = 12V
T_A = 25°C
0.4
2.5075
CIRCUIT ON THE FIRST PAGE
OF THIS DATA SHEET
0.3
0.2
2.5025
0.1
0
2.4975
–0.1
–0.2
2.4925
–0.3
–0.4
2.4875
0
–0.5
5
10
15
20
I_OUT (A)
3802 G03
Line Regulation
2.5125
2.5075
V_CC = 5V
I_OUT = 5A
T_A = 25°C
2.5025
2.4975
2.4925
2.4875
0
5 10 15 20
V_IN (V)
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
25 30
3802 G04
V_FB vs Temperature
606.0
1.0
V_CC = 5V
604.8
0.8
603.6
0.6
602.4
0.4
601.2
0.2
600.0
0
598.8
–0.2
597.6
–0.4
596.4
–0.6
595.2
–0.8
594.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
–1.0
100 125
LTC1323 • TPC05
V_FB vs V_CC Supply Voltage
603.0
0.5
T_A = 25°C
602.4
0.4
601.8
0.3
601.2
0.2
600.6
0.1
600.0
0
599.4
–0.1
598.8
–0.2
598.2
–0.3
597.6
–0.4
597.0
3
3.5 4 4.5 5 5.5
V_CC SUPPLY VOLTAGE (V)
–0.5
6
3802 G06
Line Feedforward Transient
V_OUT
2.5V
(NO LOAD)
AC 50mV/DIV
V_COMP
AC 50mV/DIV
V_IN
5V TO 15V
STEP
5V/DIV
C_IN: 1µF/50V ×6 10µs/DIV
SANYO 35CV220AX
3802 G07
3802f
5