MIC2128 Datasheet, PDF (6/32 Pages) Microchip Technology – 75V, Synchronous Buck Controller Featuring Adaptive On-Time Control with External Soft Start

MIC2128
2.0 TYPICAL CHARACTERISTIC CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, V_VIN = 12V, f_SW = 300 kHz, R_ILIM = 1.5 k, L = 10 µH, V_EXTVDD = V_OUT, T_A = +25°C
(refer to the Typical Application circuit).
25
20
15
V_OUT = 5V
I_OUT = 0A
10
F_SW = 300 kHz
V_EN = V_VIN
5
0
6 12 18 24 30 36 42 48 54 60 66 72 78
Input Voltage (V)
FIGURE 2-1:
Input Voltage.
Input Supply Current vs.
350
340
330
320
310
300
290
280
270
260
250
-50
-25
FIGURE 2-4:
Temperature.
V_VIN = 48V, with resistor divider
between V_IN and A_GND at FREQ pin
(100 kŸ and 60 kŸ)
EN = GND
0
25
50
Temperature (°C)
75
100
Input Shutdown Current vs.
30
25
20
15
10
5
0
-50
EXTVDD = GND
V_EXTVDD = V_OUT
V_VIN = 48V
I_OUT = 0A
F_SW = 300 kHz
V_EN = V_IN
-25
0
25
50
Temperature (°C)
75
100
FIGURE 2-2:
Temperature.
Input Supply Current vs.
5.4
5.3
5.2
5.1
5
I_PVDD = 10 mA
V_EN = V_VIN
4.9
EXTVDD = GND
4.8
6
12 18 24 30 36 42 48 54 60 66 72 78
Input Voltage (V)
FIGURE 2-5:
PVDD Line Regulation
600
500
400
300
200
100
0
6
18
FIGURE 2-3:
Input Voltage.
V_VIN = 48V, with resistor divider
between V_IN and A_GND at FREQ pin
(100 kŸ and 60 kŸ)
EN = GND
30
42
54
66
78
Input Voltage (V)
Input Shutdown Current vs.
5.4
V_VIN = 48V
5.3
I_PVDD = 10 mA
V_EN = V_VIN
5.2
5.1
V_EEXXTTVVDDDD = 12V
5
4.9
4.8
-50
EXTVDD = GND
V_EXTVDD = 5V
-25
0
25
50
Temperature (°C)
75
100
FIGURE 2-6:
Temperature.
PVDD Voltage vs.
DS20005620A-page 6
 2016 Microchip Technology Inc.