MAX15026_12 Datasheet, PDF (4/23 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
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 12V, R_RT = 27kΩ, R_LIM = 30kΩ, C_VCC = 4.7µF, C_IN = 1µF, T_A = -40°C to +85°C (MAX15026B/CETD+, MAX15026BETD/V+),
T_A = T_J = -40°C to +125°C (MAX15026B/C/DATD+), unless otherwise noted. Typical values are at T_A = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
LIM Reference Current
I_LIM
V_LIM = 0.3V to 3V (Note 4)
45
50
55
µA
LIM Reference Current Tempco
V_LIM = 0.3V to 3V
2300
ppm/°C
Number of Consecutive Current-
Limit Events to Hiccup
7
Events
Soft-Start Timeout
4096
Switching
Cycles
Soft-Start Restart Timeout
8192
Switching
Cycles
Hiccup Timeout
Out of soft-start
4096
Switching
Cycles
Peak Low-Side Sink Current
Limit
Sink limit = 1.5V, R_LIM = 30kΩ (Note 4)
75
mV
BOOST
Boost Switch Resistance
POWER-GOOD OUTPUT
V_IN = V_CC = 5V, I_BST = 10mA
3
8
Ω
PGOOD Threshold Rising
90
94.5 97.5
%V_FB
PGOOD Threshold Falling
PGOOD Output Leakage
PGOOD Output Low Voltage
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
88
I_{LEAK_PGD} V_IN = V_PGOOD = 28V, V_EN = 5V, V_FB = 1V -1
V_{PGOOD_L} I_PGOOD = 2mA, EN = GND
92 94.5
+1
0.4
Temperature rising
Temperature falling
+150
20
%V_FB
µA
V
°C
°C
Note 2: All devices are 100% tested at room temperature and guaranteed by design over the specified temperature range.
Note
3:
Select
R_RT
as:
R_RT
=
f_SW
17.3 × 10⁹
+ (1x10^−7)x(f_SW2)
where f_SW is in Hertz.
Note 4: T_A = +25°C.
Note 5: 10ns for MAX15026B, 18ns for the MAX15026C/D.
Note 6: 10ns for MAX15026B, 20ns for the MAX15026C/D.
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