MAX15026_12 Datasheet, PDF (6/23 Pages) Maxim Integrated Products – Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
Typical Operating Characteristics (continued)
(V_IN = 12V, T_A = +25°C. The following TOCs are for MAX15026B/C/D, unless otherwise noted.) (See the circuit of Figure 5.)
LIM REFERENCE CURRENT
vs. TEMPERATURE
70
SINK AND SOURCE CURRENT-LIMIT
THRESHOLDS vs. RESISTANCE (RILIM)
0.2
60
0.1
VOUT
200mV/div
50
SINK CURRENT-LIMIT
0
40
-0.1
SOURCE CURRENT-LIMIT
30
-0.2
20
IOUT
10
-0.3
0
-40 -15
10
35
60
85
TEMPERATURE (°C)
STARTUP AND DISABLE FROM EN
(RLOAD = 1.5Ω)
MAX15026 toc13
-0.4
0
VOUT
1V/div
10 20 30 40 50 60 70
RESISTANCE (kΩ)
STARTUP RISE TIME
(MAX15026B)
MAX15026 toc14
VIN
5V/div
LOAD TRANSIENT ON OUT
MAX15026 toc12
AC-COUPLED
10A
1A
400µs/div
POWER-DOWN FALL TIME
MAX15026 toc15
VIN
5V/div
4ms/div
PGOOD
5V/div
VIN
5V/div
1ms/div
VOUT
1V/div
4ms/div
VOUT
1V/div
STARTUP RISE TIME
(MAX15026C/D)
MAX15026 toc16
VIN
5V/div
SOFT-START WITH 0.5V
PREBIAS AT NO LOAD (MAX15026C/D)
MAX15026 toc17
VIN
5V/div
OUTPUT SHORT-CIRCUIT BEHAVIOR MONITOR
OUTPUT VOLTAGE AND CURRENT
MAX15026 toc18
500mV/div
VOUT
0
0V OUTPUT
VOUT
1V/div
0.5V OUTPUT PREBIAS
VOUT
1V/div
IOUT
1ms/div
1ms/div
4ms/div
6 _______________________________________________________________________________________
20A/div
0