Rainbow Electronics MAX15023 - Manual (Page 3)

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
COMP_ Swing (High) 2.4 V
COMP_ Swing (Low) No load at COMP_ 0.6 V
COMP_ Source/Sink Current I COMP_ | I COMP_ |, V COMP_ = 1.5V 45 80 120 µA
ENABLE (EN_)
EN_ Input High V EN_H EN_ rising 1.15 1.20 1.25 V
EN_ Input Hysteresis V EN_HYS 150 mV
EN_ Input Leakage Current I LEAK_EN_ -250 +250 nA
OSCILLATOR
Switching Frequency f SW Each converter 460 500 540 kHz
Switching Frequency
Adjustment Range
(Note 4) 200 1000 kHz
PWM Ramp Peak-to-Peak
Amplitude
V RAMP 1.42 V
PWM Ramp Valley V VALLEY 0.72 V
Phase Shift Between
Channels
From DH1 to DH2 rising edges 180 Degrees
Minimum Controllable On-Time 60 100 ns
Maximum Duty Cycle 86 87.5 %
OUTPUT DRIVERS
Low, sinking 100mA, V BST_ - V LX_ = 5V 1
DH_ On-Resistance
H i g h, sour ci ng 100m A, V B S T _ - V L X _ = 5V 1.2
Ω
Low, sinking 100mA, V CC = 5.2V 0.75
DL_ On-Resistance
High, sourcing 100mA, V CC = 5.2V 1.4
Ω
Sinking 3
DH_ Peak Current C LOAD = 10nF
Sourcing 2
A
Sinking 3
DL_ Peak Current C LOAD = 10nF
Sourcing 2
A
DH_, DL_ Break-Before-Make
Time (Dead Time)
15 ns
SOFT-START
Soft-Start Duration 2048
Switching
cycles
Reference Voltage Steps 64 Steps
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 12V, R T = 33k
Ω, C
VCC = 4.7µF, C IN = 1µF, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
(Note 3)