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MAX17574 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX17574
Description  4.5V to 60V, 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
PDF  21 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX17574 Datasheet(HTML) 4 Page - Maxim Integrated Products

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(VIN = VEN/UVLO = 24V, RRT = 40.2KΩ (fSW = 500kHz), CVCC = 2.2µF, VSGND = VPGND = VMODE/SYNC = VEXTVCC = 0V, VFB = 1V,
LX = SS = CF = RESET = OPEN, VBST to VLX = 5V, TA = -40°C to 125°C, unless otherwise noted. Typical values are at TA = +25°C.
All voltages are referenced to SGND, unless otherwise noted.) (Note 3)
Electrical Characteristics (continued)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER MOSFETS
High-Side nMOS On-Resistance
RDS-ONH
ILX = 0.3A ,sourcing
100
200
mΩ
Low-Side nMOS On-Resistance
RDS-ONL
ILX = 0.3A , sinking
64
125
mΩ
LX Leakage Current
ILXLKG
TA = 25°C, VLX = (VPGND + 1V) to
(VIN - 1V)
-2
+2
µA
SOFT START
Soft-Start Current
ISS
VSS = 0.5V
4.7
5
5.3
µA
FEEDBACK (FB)
FB Regulation Voltage
VFB_REG
MODE/SYNC = SGND or VCC
0.892
0.9
0.908
V
FB Regulation Voltage
VFB_REG
MODE/SYNC = OPEN
0.892
0.916
0.934
V
FB Input Leakage Current
IFB
0 < VFB < 1V, TA = 25°C
-50
+50
nA
MODE/SYNC
MODE Threshold
VM-DCM
MODE = VCC (DCM Mode)
VCC –
0.65
V
MODE Threshold
VM-PFM
MODE = OPEN (PFM Mode)
VCC/2
V
MODE Threshold
VM-PWM
MODE = SGND (PWM Mode)
0.75
V
SYNC Frequency Capture
Range
1.1 x
fSW
1.4 x
fSW
kHz
SYNC Pulse Width
50
ns
SYNC Threshold
VIL
0.8
V
VIH
2.1
V
CURRENT LIMIT
Peak Current Limit Threshold
IPEAK-LIMIT
4.4
5.25
5.85
A
Runaway Current Limit
Threshold
IRUNAWAY-
LIMIT
4.9
5.8
6.7
A
Valley Current-Limit Threshold
IVALLEY-LIMIT
MODE/SYNC = OPEN or MODE/
SYNC = VCC
-0.25
0
+0.25
A
Valley Current-Limit Threshold
IVALLEY-LIMIT
MODE/SYNC = SGND
-1.8
A
PFM Current-Limit Threshold
IPFM
MODE/SYNC = OPEN
0.575
0.725
0.9
A
MAX17574
4.5V to 60V, 3A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
with Internal Compensation
www.maximintegrated.com
Maxim Integrated │ 4



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