MAX15022_11 Datasheet, PDF (3/28 Pages) Maxim Integrated Products – Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers

Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
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
LDO CONTROLLERS
FB3, FB4 Input Bias Current
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
-250
+250
nA
FB3, FB4 Voltage Set-point
FB3, FB4 to B3, B4
Transconductance
5mA sink current, V_{B_} = 0.5V to 5.5V
2.5mA to 10mA sink current,
V_{B_} = 0.5V to 5.5V
0.585 0.600 0.615
V
0.56 1.20 2.30
S
B3, B4 Driver Sink Current
V_FB3, V_FB4 = 0V, V_{B_} = 0.5V to 5.5V
20
mA
LDO Soft-Start Duration
512
Clock
Cycles
LDO Reference Voltage Steps
POWER MOSFETS
Regulator 1 p-Channel MOSFET
R_DSON
Regulator 1 n-Channel MOSFET
R_DSON
Regulator 1 Gate Charge
Maximum LX1 RMS Current
Regulator 2 p-Channel MOSFET
R_DSON
Regulator 2 n-Channel MOSFET
R_DSON
Regulator 2 Gate Charge
Maximum LX2 RMS Current
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_DVDD1 = 5V
V_DVDD1 = 5V
V_DVDD1 = 5V
V_DVDD2 = 5V
V_DVDD2 = 5V
V_DVDD2 = 5V
V_PVIN = V_AVIN = 3.3V
V_PVIN = V_AVIN = 2.5V
V_PVIN = V_AVIN = 3.3V
V_PVIN = V_AVIN = 2.5V
V_PVIN = V_AVIN = 3.3V
V_PVIN = V_AVIN = 2.5V
V_PVIN = V_AVIN = 3.3V
V_PVIN = V_AVIN = 2.5V
64
Steps
50
90
mΩ
30
50
mΩ
8
nC
4
A
100 180
mΩ
60
100
mΩ
4
nC
2
A
4.5
4.9
5.3
A
3.40 3.65 3.95
4.0
5.0 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
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