LM3310_15 Datasheet, PDF (11/33 Pages) Texas Instruments – Step-Up PWM DC/DC Converter with Integrated Op-Amp and Gate Pulse Modulation Switch

LM3310
www.ti.com
SNVS341E – AUGUST 2005 – REVISED MAY 2013
Typical Performance Characteristics (continued)
Power NMOS R_DSON
vs.
Input Voltage
660kHz Max. Duty Cycle
vs.
Input Voltage
0.25
0.23
I_SW = 1A
93.0
T_J = -40^oC
0.21
T_A = 100°C
0.19
92.5
92.0
T_J = 25^oC
0.17
0.15
T_A = 25°C
91.5
T_J = 125^oC
0.13
91.0
0.11
T_A = -40°C
0.09
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
INPUT VOLTAGE (V)
Figure 23.
90.5
2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
INPUT VOLTAGE (V)
Figure 24.
1.28MHz Max. Duty Cycle
vs.
Input Voltage
94.0
93.5
93.0
TJ = -40°C
TJ = 25°C
92.5
92.0
TJ = 125°C
91.5
91.0
90.5
90.0
89.5
89.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
INPUT VOLTAGE (V)
Figure 25.
660kHz Max. Duty Cycle
vs.
Temperature
93.0
92.5
V_IN = 7.0V
92.0
91.5
91.0
V_IN = 2.5V
90.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
JUNCTION TEMPERATURE (^oC)
Figure 26.
1.28MHz Max. Duty Cycle
vs.
Temperature
93.5
93.0
V_IN = 7.0V
92.5
92.0
91.5
91.0
90.5
90.0
V_IN = 2.5V
89.5
89.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
JUNCTION TEMPERATURE (°C)
Figure 27.
1.28MHz Application Efficiency
95
V_OUT = 8.5V
V_IN = 5.5V
90
85
V_IN = 2.5V
80
75
V_IN = 4.2V
V_IN = 3.3V
70
65
0.01
0.10
1.00
LOAD CURRENT (A)
Figure 28.
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