MIC28512 Datasheet, PDF (11/34 Pages) Microchip Technology – 70V, 2A Synchronous Buck Regulator

MIC28512
2.5
2.0
1.5 VIN =48V
f_SW = 300kHz
T_Jmax =125°C
1.0 Θ_JA = 30°C/W
0.5
5.0V
3.3V
0.0
25 40 55 70 85 100
AMBIENT TEMPERATURE (°C)
FIGURE 2-25:
(MIC28512-1).
48V Input Thermal Derating
600
590
580
570
560
550
540
530
520
510
500
7.0
16.0 25.0 34.0 43.0 52.0 61.0 70.0
INPUT VOLTAGE (V)
FIGURE 2-26:
Switching Frequency vs.
Input Voltage (MIC28512-1).
V
IN
(10V/div)
V_SW
(10V/div)
V_OUT
(5V/div)
I_LX
(2A/div)
FIGURE 2-28:
(MIC28512-2).
V_IN = 12V
V_OUT = 5V
I_OUT = 2A
Time (2ms/div)
V_IN Shutdown
V_EN
(2V/div)
V_OUT
(2V/div)
I_L
(1A/div)
V_IN = 12V
V_OUT = 5V
I_OUT = 2A
Time (2μs/div)
FIGURE 2-29:
Enable Turn-On Delay and
Rise Time (MIC28512-2).
V_IN
(10V/div)
V_SW
(10V/div)
V_OUT
(5V/div)
LX
(2A/div)
FIGURE 2-27:
MIC28512-2.
V_IN = 12V
V = 5V
OUT
I_OUT = 2A
Time (4ms/div)
V_IN Soft Start Turn-On
V_EN
(2V/div)
V_OUT
(2V/div)
I_L
(1A/div)
V_IN = 12V
V_OUT = 5V
I_OUT = 2A
Time (2ms/div)
FIGURE 2-30:
Enable Turn-Off Delay and
Rise Time (MIC28512-2).
 2016 Microchip Technology Inc.
DS20005524A-page 11