Manual

MAX15022
Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVIN
= V
PVIN_
= V
DVDD_
= 3.3V, V
PGND_
= V
SGND
= 0V, R
T
= 25kΩ, and T
A
= T
J
= -40°C to +125°C, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ENABLE/SEL
EN_ Threshold V
EN_
rising 1.207 1.225 1.243 V
EN_ Hysteresis 0.12 V
EN_ Input Current -2.5 +2.5 μA
SEL High Threshold 0.85 x V
AVIN
V
SEL Low Threshold 0.2 x V
AVIN
V
SEL Input Bias Current Present only during startup -100 +100 μA
OSCILLATOR
Switching Frequency Range f
SW
f
SW
= 4MHz x [V
RT
(V)/1.067(V)] (Note 4) 4000 kHz
f
SW
≤ 1500kHz -6 +6
Oscillator Accuracy
f
SW
> 1500kHz -10 +10
%
Phase Shift Between Regulators 180 Degrees
RT Current 0 < V
RT
< 1.067V 31.30 32.00 32.58 μA
RT Voltage Range V
RT
0.130 1.067 V
Minimum Controllable On-Time 60 ns
Minimum Controllable Off-Time 60 ns
PWM Ramp Amplitude V
AVIN
/4 V
PWM Ramp Valley 0.3 V
THERMAL SHUTDOWN
Thermal Shutdown Temperature Temperature rising +160 °C
Thermal Shutdown Hysteresis 15 °C
Note 3: Specifications are 100% production tested at T
A
= +25°C and T
A
= +125°C. Maximum and minimum specifications over
temperature are guaranteed by design.
Note 4: When operating with V
AVIN
= 2.5V, the maximum operating frequency should be derated to 3MHz.