MAX15014_07 Datasheet, PDF (6/26 Pages) Maxim Integrated Products – 1A, 4.5V to 40V Input Buck Converters with 50mA Auxiliary LDO Regulators

1A, 4.5V to 40V Input Buck Converters with
50mA Auxiliary LDO Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V_{IN_SW} = V_{IN_LDO} = V_DRAIN = 14V, V_{EN_SYS} = V_{EN_SW} = 2.4V, V_REG = V_DVREG, V_SYNC = V_{SET_LDO} = V_SGND = V_PGND = 0V, C_REG =
1µF, C_{IN_SW} = 0.1µF, C_{IN_LDO} = 0.1µF, C_{LDO_OUT} = 10µF, C_DRAIN = 0.22µF, T_A = T_J = -40°C to +125°C, unless otherwise noted.
Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
RESET OUTPUT
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
RESET Threshold
RESET Output Low Voltage
RESET Output High Leakage
Current
V _RESET
V_RL
I_RH
RESET goes high after rising V_{LDO_OUT}
crosses this threshold
(V_{LDO_OUT} – V_RESET) / I_RESET = 4kΩ
V _RESET = 3.3V (For MAX15_ _ _B),
V _RESET = 5V (For MAX15_ _ _A)
90
92.5
95 %V_OUT
0.4
V
1
µA
RESET Output Minimum Timeout
When LDO_OUT reaches RESET threshold,
50
µs
Period
CT = unconnected
ENABLE to RESET Minimum
Timeout Period
When EN_SYS goes high, C_{LDO_OUT} =
10µF, I_{LDO_OUT} = 50mA, V_{LDO_OUT} = 3.3V,
650
µs
CT = unconnected
Delay Comparator Threshold
(Rising)
Delay Comparator Threshold
Hysteresis
CT Charge Current
CT Discharge Current
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V_CT-TH
V_CTTH-
HYST
I_CT-CHQ
I_CT-DIS
V_CT = 0V
Temperature rising
1.220 1.241 1.265
V
100
mV
1.5
2
3
µA
18
mA
+160
°C
20
°C
Note 1: Limits at -40°C are guaranteed by design and not production tested.
Note 2: Maximum output current is limited by package power dissipation.
Note 3: This is the minimum voltage needed at SET_LDO for the system to recognize that the user wants an adjustable LDO_OUT.
6 _______________________________________________________________________________________