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MAX17545 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX17545
Description  4.5V??2V, 1.7A, 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

MAX17545 Datasheet(HTML) 4 Page - Maxim Integrated Products

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(VIN = VEN/UVLO = 24V, RRT = 40.2kΩ (500kHz), CVCC = 2.2μF, VPGND = VSGND = VMODE = VSYNC = 0V, LX = SS = RESET =
open, VBST to VLX = 5V, VFB = 1V, 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 2)
Note 2: All limits are 100% tested at +25°C. Limits over temperature are guaranteed by design.
Note 3: See the Overcurrent Protection/Hiccup Mode section for more details.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
RT AND SYNC
Switching Frequency
fSW
RRT = 210kΩ
90
100
110
kHz
RRT = 102kΩ
180
200
220
RRT = 40.2kΩ
475
500
525
RRT = 8.06kΩ
1950
2200
2450
RRT = open
460
500
540
SYNC Frequency Capture Range
fSW set by RRT
1.1 x fSW
1.4 x fSW
kHz
SYNC Threshold
VIH
2.1
V
VIL
0.8
FB Undervoltage Trip Level to
Cause Hiccup
VFB-HICF
0.56
0.58
0.65
V
Hiccup Timeout
(Note 3)
32,768
Cycles
Minimum On-Time
tON-MIN
135
ns
Minimum Off-Time
tOFF-MIN
140
160
ns
LX Dead Time
5
ns
RESET
RESET Output Level Low
IRESET = 10mA
0.4
V
RESET Output Leakage Current
TA = TJ = +25ºC, VRESET = 5.5V
-0.1
+0.1
µA
FB Threshold for RESET Assertion
VFB-OKF
VFB falling
90.5
92
94.6 %VFB-
REG
FB Threshold for RESET
Deassertion
VFB-OKR
VFB rising
93.8
95
97.8 %VFB-
REG
RESET Deassertion Delay After FB
Reaches 95% Regulation
1024
Cycles
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Temperature rising
165
ºC
Thermal-Shutdown Hysteresis
10
ºC
MAX17545
4.5V–42V, 1.7A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
With Internal Compensation
www.maximintegrated.com
Maxim Integrated │ 4
Electrical Characteristics (continued)



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