MAX15002_12 Datasheet, PDF (4/29 Pages) Maxim Integrated Products – Dual-Output Buck Controller with Tracking/Sequencing

MAX15002
Dual-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, T_A = T_J = +25°C.)
(Note 2)
PARAMETER
PGOOD_, RESET OUTPUTS
FB_ for PGOOD_ Threshold
RESET, PGOOD_ Output Low
Level
RESET, PGOOD_ Leakage
CT Charging Current
CT Output Low
CT Threshold for RESET Delay
OSCILLATOR
SYMBOL
CONDITIONS
FB_ falling
Sinking 3mA
Sinking 3mA
CT rising
CT falling
MIN TYP MAX UNITS
0.54 0.555 0.57
V
0.1
V
-1
+1
µA
1.8
2
2.2
µA
0.1
V
1.8
2.6
V
1.2
Switching Frequency Range
(Each Converter)
Switching Frequency Accuracy
(Each Converter)
Phase Delay
RT Voltage
Minimum Controllable On-Time
Minimum Off-Time
SYNC High-Level Voltage
SYNC Low-Level Voltage
SYNC Internal Pulldown Resistor
SYNC Frequency Range
SYNC Minimum On-Time
SYNC Minimum Off-Time
PWM Ramp Amplitude
(Peak-Peak)
PWM Ramp Valley
f_SW
V_SYNC = 0V, f_SW = 1.5 x 10¹¹/R_RT + 2k
V_RT
t_ON(MIN)
t_OFF(MIN)
f_SW ≤ 1500kHz
f_SW > 1500kHz
V_PHASE = 0V (DH1 rising to DH2 rising)
V_PHASE = V_REG (DH1 rising to DH2 rising)
40kΩ < R_RT < 500kΩ
(Note 4)
200
2200 kHz
-5
+5
%
-7
+7
180
D eg r ees
0
D eg r ees
2
V
75
ns
150
ns
2
V
0.8
V
50
100 200
kΩ
0.4
4.6
MHz
30
ns
30
ns
2
V
1
V
Note 2: 100% production tested at T_A = T_J = +25°C and T_A = T_J = +125°C. Limits at other temperatures are guaranteed by design.
Note 3: For 5V applications, connect REG directly to IN.
Note 4: The switching frequency is 1/2 of the SYNC frequency.
4
Maxim Integrated