MAX15003 Datasheet, PDF (4/32 Pages) Maxim Integrated Products – Triple-Output Buck Controller with Tracking/Sequencing

Triple-Output Buck Controller with
Tracking/Sequencing
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 5.5V to 23V or V_IN = V_REG = 4.5V to 5.5V, V_DREG_ = V_REG, V_PGND_ = V_SYNC = V_PHASE = V_SEL = 0V, C_REG = 2.2µF, R_RT =
100kΩ, C_CT = 0.1µF, R_ILIM_ = 60kΩ, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at V_IN = 12V and T_A = T_J
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SEL High Threshold
SEL Low Threshold
SEL Input Bias Current
PGOOD, RESET OUTPUTS
FB_ For Threshold PGOOD_
RESET, PGOOD_ Output Low
Level
RESET, PGOOD_ Leakage
CT Charging Current
CT Pulldown Resistance
CT Threshold for RESET Delay
OSCILLATOR
SYMBOL
CONDITIONS
Present only during startup
FB_ falling
Sinking 3mA
Sinking 3mA
CT rising
CT failling
MIN
80
-100
TYP
MAX
20
+100
UNITS
%V_REG
%V_REG
µA
0.540 0.555 0.570
V
0.1
V
-1
+1
µA
1.8
2.0
2.2
µA
33
Ω
1.8
2.6
V
1.2
Switching Frequency Range
(Each Converter)
f_SW
V_SYNC = 0V, f_CLK = 10¹¹ / (R_RT + 1.75kΩ)
200
2200 kHz
Switching Frequency Accuracy
(Each Converter)
f_SW ≤ 1500kHz
f_SW ≥ 1500kHz
-5
+5
%
-7
+7
Phase Delay
V_PHASE = 0V (DH1 rising to DH2 rising and
DH2 rising to DH3 rising)
V_PHASE = V_REG (DH1 rising to DH2 rising
and DH2 rising to DH3 rising)
120
degrees
0
degrees
RT Voltage
Minimum Controllable On-Time
Minimum Off-Time
SYNC High-Level Voltage
V_RT
t_ON(MIN)
t_OFF(MIN)
40kΩ < R_RT < 500kΩ
2
V
75
ns
150
ns
2
V
SYNC Low-Level Voltage
0.8
V
SYNC Internal Pulldown Resistor
50
100 200
kΩ
SYNC Frequency Range
(Note 3)
0.6
6.9
MHz
SYNC Minimum On-Time
30
ns
SYNC Minimum Off-Time
30
ns
PWM Ramp Amplitude
(Peak-to-Peak)
2
V
PWM Ramp Valley
1
V
Note 1: 100% production tested at T_A = T_J = +25°C and T_A = T_J = +125°C. Limits at other temperature are guaranteed by design.
Note 2: For 5V applications, connect REG directly to IN.
Note 3: The switching frequency is 1/3 of the SYNC frequency.
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