MAX15046_10 Datasheet, PDF (3/24 Pages) Maxim Integrated Products – 40V, High-Performance, Synchronous Buck Controller

40V, High-Performance, Synchronous
Buck Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 24V, VEN = 5V, VGND = VPGND = 0V, CIN = 1FF, CVCC = 4.7FF, RRT = 49.9kI, TA = TJ = -40NC to +125NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
VCOMP-RAMP Minimum Voltage
COMP Source/Sink Current
ENABLE (EN)
EN Input High
EN Input Low
EN Input Leakage Current
OSCILLATOR
Switching Frequency (100kHz)
Switching Frequency (300kHz)
Switching Frequency (1MHz)
Switching Frequency Adjustment
Range
SYMBOL
CONDITIONS
ICOMP
VCOMP = 1.4V
VEN_H
VEN_L
IEN
VEN rising
VEN falling
VEN = 5.5V
fSW
RRT = 150kI
fSW
RRT = 49.9kI
fSW
RRT = 14.3kI
(Note 3)
MIN TYP MAX UNITS
200
mV
50
80
110
FA
1.14 1.20 1.26
V
1.05
V
-1
+1
FA
80
100
120
270
300
330
0.9
1
1.1
100
1000
kHz
kHz
MHz
kHz
RT Voltage
PWM MODULATOR
VRT
RRT = 49.9kI
1.15
1.2
1.25
V
PWM Ramp Peak-to-Peak
Amplitude
VRAMP
1.5
V
PWM Ramp Valley
VVALLEY
Minimum Controllable On-Time
Maximum Duty Cycle
Minimum Low-Side On-Time
OUTPUT DRIVERS/DRIVERS SUPPLY (VDRV)
Undervoltage Lockout
VDRV_UVLO
DRV Undervoltage Lockout
Hysteresis
fSW = 300kHz (RRT = 49.9kI)
fSW = 1MHz (RRT = 14.3kI)
VDRV rising
1.5
V
70
125
ns
85
87.5
%
110
ns
4.0
4.2
4.4
V
400
mV
DH On-Resistance
DL On-Resistance
Low, sinking 100mA,
VBST - VLX = 5V
High, sourcing 100mA,
VBST - VLX = 5V
Low, sinking 100mA,
VDRV = VCC = 5.25V
High, sourcing 100mA,
VDRV = VCC = 5.25V
1
3
1.5
4
I
1
3
1.5
4
DH Peak Current
Sinking,
VBST - VLX = 5V
3
CLOAD = 10nF
A
Sourcing,
VBST - VLX = 5V
2
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