ISL78200_14 Datasheet, PDF (12/22 Pages) Intersil Corporation – 2.5A Regulator with Integrated High-Side MOSFET for Synchronous Buck or Boost Buck Converter

Performance Curves (Continued)
ISL78200
V_OUT 10mV/DIV (5V OFFSET)
PHASE 10V/DIV
5µs/DIV
FIGURE 23. NON-SYNCHRONOUS BUCK, FORCE PWM MODE,
V_IN 12V, 2A
V_OUT 1V/DIV
V_IN_BOOST 5V/DIV
20ms/DIV
FIGURE 24. BOOST BUCK MODE, BOOST INPUT STEP FROM
40V TO 3V
V_OUT 1V/DIV
V_OUT 5V/DIV
IL_BOOST 2A/DIV
V_IN_BOOST 5V/DIV
PHASE_BOOST 20V/DIV
PHASE_BUCK 20V/DIV
20ms/DIV
FIGURE 25. BOOST BUCK MODE, BOOST INPUT STEP FROM
3V TO 40V
10ms/DIV
FIGURE 26. BOOST BUCK MODE, V_O = 9V, I_O = 1.8A, BOOST INPUT
DROPS FROM 16V TO 9V DC
95
90 ^{15V VIN}
85
80
6V V_IN
75
9V V_IN
70
5V V_IN
65
60
30V V_IN
55
BOOST BUCK, V_O = 12V
50
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4
LOAD CURRENT (A)
FIGURE 27. EFFICIENCY, BOOST BUCK, 500kHz, V_OUT 12V, TA = +25°C
12
FN7641.2
December 24, 2013