Rainbow Electronics MAX15046B - Manual (Page 3)

40V, High-Performance, Synchronous
Buck Controller
MAX15046
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ELECTRICAL CHARACTERISTICS (continued)
(V IN = 24V, V EN = 5V, V GND = V PGND = 0V, C IN = 1FF, C VCC = 4.7FF, R RT = 49.9kI, T A = T J = -40NC to +125NC, unless otherwise
noted. Typical values are at T A = +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V COMP-RAMP Minimum Voltage 200 mV
COMP Source/Sink Current I COMP V COMP = 1.4V 50 80 110 F A
ENABLE (EN)
EN Input High
V EN_H V EN rising 1.14 1.20 1.26 V
EN Input Low V EN_L V EN falling 1.05 V
EN Input Leakage Current I EN V EN = 5.5V -1 +1
F A
OSCILLATOR
Switching Frequency (100kHz)
f SW R RT = 150kI 80 100 120 kHz
Switching Frequency (300kHz) f SW R RT = 49.9kI 270 300 330 kHz
Switching Frequency (1MHz) f SW R RT = 14.3kI 0.9 1 1.1 MHz
Switching Frequency Adjustment
Range
(Note 3) 100 1000 kHz
RT Voltage V RT R RT = 49.9kI 1.15 1.2 1.25 V
PWM MODULATOR
PWM Ramp Peak-to-Peak
Amplitude
V RAMP 1.5 V
PWM Ramp Valley V VALLEY 1.5 V
Minimum Controllable On-Time 70 125 ns
Maximum Duty Cycle f SW = 300kHz (R RT = 49.9kI ) 85 87.5 %
Minimum Low-Side On-Time f SW = 1MHz (R RT = 49.9kI ) 110 ns
OUTPUT DRIVERS/DRIVERS SUPPLY (V DRV )
Undervoltage Lockout V DRV_UVLO V DRV rising 4.0 4.2 4.4 V
DRV Undervoltage Lockout
Hysteresis
400 mV
DH On-Resistance
Low, sinking 100mA,
V
BST - V LX = 5V
1 3
I
High, sourcing 100mA,
V
BST - V LX = 5V
1.5 4
DL On-Resistance
Low, sinking 100mA,
V
DRV = V CC = 5.25V
1 3
High, sourcing 100mA,
V
DRV = V CC = 5.25V
1.5 4
DH Peak Current C LOAD = 10nF
Sinking,
V
BST - V LX = 5V
3
A
Sourcing,
V
BST - V LX = 5V
2