ER3110DI Datasheet, PDF (9/23 Pages) Altera Corporation – Synchronous Buck Regulator

Page 9
Efficiency Curves F_SW = 500kHz, T_A = +25°C (Continued)
1.810
1.809
1.808
V_PVIN = 15V
V_PVIN = 5V
V_PVIN = 12V
1.807
1.806
1.805
1.804
1.803
V_PVIN = 33V
V_PVIN = 24V
1.802
1.801
1.800
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 17. V_OUT REGULATION vs LOAD, PWM, V_OUT = 1.8V
1.818
1.816
1.814
V_PVIN = 5V
1.812
1.810
1.808
V_PVIN = 12V
V_PVIN = 15V
1.806
1.804
1.802
V_PVIN = 33V
V_PVIN = 24V
1.800
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 18. V_OUT REGULATION vs LOAD, PFM, V_OUT = 1.8V
Measurements F_SW = 500kHz, V_PVIN = 24V, V_OUT = 3.3V, T_A = +25°C
SW 20V/DIV
V_OUT 2V/DIV
EN 20V/DIV
POK 2V/DIV
5ms/DIV
FIGURE 19. START-UP AT NO LOAD, PFM
SW 20V/DIV
V_OUT 2V/DIV
EN 20V/DIV
POK 2V/DIV
5ms/DIV
FIGURE 20. START-UP AT NO LOAD, PWM
SW 20V/DIV
V_OUT 2V/DIV
EN 20V/DIV
100ms/DIV
POK 2V/DIV
FIGURE 21. SHUTDOWN AT NO LOAD, PFM
SW 20V/DIV
V_OUT 2V/DIV
EN 20V/DIV
100ms/DIV
POK 2V/DIV
FIGURE 22. SHUTDOWN AT NO LOAD, PWM
May 2014 Altera Corporation
10038
Enpirion Power Datasheet ER3110DI Wide PVIN 1A Synchronous Buck Regulator
May 28, 2014
Rev A