LTC3417A-2_15 Datasheet, PDF (5/20 Pages) Linear Technology – Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3417A-2
OUT1 Efficiency vs Load Current
100 _{VIN = 2.5V}
95 ^{VOUT = 1.8V}
90
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
REFER TO FIGURE 4
0.01
0.1
1
10
LOAD CURRENT (A)
3417A-2 G07
OUT2 Efficiency vs Load Current
100
V_IN = 3.6V
95 ^{VOUT = 2.5V}
90
85
80
75
70
65
60
0.001
Burst Mode
OPERATION
PULSE SKIP
FORCED
CONTINUOUS
REFER TO FIGURE 4
0.01
0.1
1
LOAD CURRENT (A)
3417A-2 G08
OUT1 Efficiency vs V_IN
(Burst Mode Operation)
100 _{VOUT = 1.8V}
95
I_LOAD = 460mA
90
I_LOAD = 1.4A
85
80
75
REFER TO FIGURE 4
70
2 2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
3417A-2 G09
OUT2 Efficiency vs V_IN
(Pulse Skipping Mode)
100
I_LOAD = 250mA
95
90
I_LOAD = 800mA
Load Step OUT1
V_OUT1
100mV/DIV
Load Step OUT2
V_OUT2
100mV/DIV
85
I_OUT1
I_OUT2
500mA/DIV
500mA/DIV
80
75
V_OUT = 2.5V
REFER TO FIGURE 4
70
2 2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
3417A-2 G10
V_IN = 3.6V
100μs/DIV
V_OUT = 1.8V
I_LOAD = 0.25A to 1.4A
REFER TO FIGURE 4
3417A-2 G11
V_IN = 3.6V
100μs/DIV
V_OUT = 2.5V
I_LOAD = 0.25A to 0.8A
REFER TO FIGURE 4
3417A-2 G12
Efficiency vs Frequency OUT1
94
T_A = 27°C
V_IN = 3.6V
92
V_OUT = 1.8V
I_OUT = 300mA
90
88
86
84
82
0
1
2
3
4
5
FREQUENCY (MHz)
3417A-2 G13
Efficiency vs Frequency OUT2
90
85
80
75
70
65
60
0
T_A = 27°C
V_IN = 3.6V
V_OUT = 2.5V
I_OUT = 100mA
1
2
3
4
FREQUENCY (MHz)
3417A-2 G14
R_DS(ON) vs V_IN OUT1
0.105
0.100
0.095
P-CHANNEL SWITCH
T_{A =} 27°C
0.090
0.085
N-CHANNEL SWITCH
0.080
2 2.5 3 3.5 4
V_IN (V)
4.5 5 5.5
3417A-2 G15
3417a2fa
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