MAX15021 Datasheet, PDF (3/24 Pages) Maxim Integrated Products – Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Tracking/Sequencing Capability

MAX15021
Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Tracking/Sequencing Capability
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
PWM CURRENT LIMIT AND HICCUP MODE
Regulator 1 Peak Current Limit
Regulator 1 Valley Current Limit
Regulator 2 Peak Current Limit
Regulator 2 Valley Current Limit
Number of Cumulative Current-Limit
Events to Hiccup
Number of Consecutive Noncurrent
Limit Cycles to Clear N_CL
Hiccup Timeout
N_CL
N_CLR
N_HT
V_AVIN = 3.3V
V_AVIN = 2.5V
V_AVIN = 3.3V
V_AVIN = 2.5V
V_AVIN = 3.3V
V_AVIN = 2.5V
V_AVIN = 3.3V
V_AVIN = 2.5V
4.5
4.9
5.3
A
3.4
3.65 3.95
4.0
4.9 5.65
A
3.0
3.7 4.25
2.25 2.45 2.65
A
1.70 1.85 1.98
2.0
2.5 2.83
A
1.5
1.85 2.13
4
Clock
Cycles
3
Clock
Cycles
8192
Clock
Cycles
ENABLE/SEL
EN_ Threshold
EN_ Hysteresis
EN_ Input Current
SEL High Threshold
SEL Low Threshold
SEL Input Bias Current
OSCILLATOR
V_{EN_} rising
Present only during startup
1.207 1.225 1.243
V
0.12
V
-2.5
+2.5
µA
0.85 x V_AVIN
V
0.2 x V_AVIN
V
-100
+100
µA
Switching Frequency Range
f_SW
f_SW = 3MHz x [V_RT(V)/1.067(V)]
(Note 4)
500
4000
kHz
Oscillator Accuracy
Phase Shift Between Regulators
RT Current
RT Voltage Range
Minimum Controllable On-Time
Minimum Controllable Off-Time
PWM Ramp Amplitude
PWM Ramp Valley
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
f_SW ≤ 1500kHz
f_SW > 1500kHz
0 < V_RT < 1.067V
V_RT
Temperature rising
-6
-10
31.30
0.13
180
32
60
60
V_AVIN/4
0.3
+6
+10
32.58
1.067
%
Degrees
µA
V
ns
ns
V
V
+160
°C
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 switching frequency should be derated to 3MHz.
Maxim Integrated
3