TPS542941_15 Datasheet, PDF (12/29 Pages) Texas Instruments – 2A/3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

TPS542941
SLVSBI3B – JULY 2012 – REVISED OCTOBER 2013
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TYPICAL CHARACTERISTICS (continued)
One output is enabled unless otherwise noted. V_IN = V_IN1 or V_IN2. V_IN = 12 V, T_A = 25°C (unless otherwise noted).
900
V_IN1, V_IN2 = 12 V
800
V_O1(10mV/div)
V_O1 = 3.3 V
I_O1 = 2A
700
600
500
400
SW1(5V/div)
300
200
100
0
0.01
0.1
1
Output Current (A)
V_OUT2 = 1.5 V
10
G019
400 nsec/div)
Figure 19. VO2 = 1.5V, SW-frequency vs
Output Current (PWP)
Figure 20. VO1 = 3.3V, VO1 Ripple Voltage (I_O1= 4 A)
V_O2(10mV/div)
V_O2 = 1.5 V
I_O2 = 3A
VIN1(50mV/div)
V_O1 = 3.3 V I_O1 = 2 A
SW2(5V/div)
SW1(5V/div)
400 nsec/div)
Figure 21. VO2 = 1.5V, Ripple Voltage (I_O2= 2 A)
VIN2(50mV/div)
400 nsec/div)
Figure 22. VIN1 Input Voltage Ripple (I_O1= 4 A)
V_O2 = 1.5 V I_O2 = 3 A
SW2(5V/div)
400 nsec/div)
Figure 23. VIN2 Input Voltage Ripple (I_O2= 2 A)
12
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