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MAX17550 Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # MAX17550
Description  60V, 25mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22關A No-Load Supply Current
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

MAX17550 Datasheet(HTML) 4 Page - Maxim Integrated Products

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(VIN = 24V, VGND = 0V, VOUT = 3.3V, VFB = 0.85V, VEN/UVLO = 1.5V, RT/SYNC = 191kΩ, LX = SS = MODE = RESET = unconnected;
TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. All voltages are referenced to GND, unless otherwise
noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT LIMIT
Switching Frequency
fSW
RRT = 422kΩ
90
100
111
kHz
RRT = 191kΩ
205
220
235
RRT = 130kΩ
295
319
340
RRT = 69.8kΩ
540
592
638
RRT = 45.3kΩ
813
900
973
RRT = 19.1kΩ
1.86
2.08
2.3
MHz
Switching-Frequency Adjustable
Range
See the Switching Frequency
(RT/SYNC) section for details
100
2200
kHz
SYNC Input Frequency
1.1 x fSW
2200
kHz
SYNC Pulse Minimum Off-Time
40
ns
SYNC Rising Threshold
VSYNC-H
1
1.22
1.44
V
Hysteresis
VSYNC-HYS
0.115
0.18
0.265
Number of SYNC Pulses to
Enable Synchronization
1
Cycles
TIMING
Minimum On-Time
tON-MIN
46
82
128
ns
Maximum Duty Cycle
DMAX
fSW ≤ 600kHz,
VFB = 0.98 x VFB-REG
90
94
98
%
fSW > 600kHz,
VFB = 0.98 x VFB-REG
87
92
Hiccup Timeout
51
ms
RESET
FB Threshold for RESET Rising
VFB-OKR
VFB rising
93
95
97
%
FB Threshold for RESET Falling
VFB-OKF
VFB falling
90
92
94
%
RESET
Delay after FB Reaches
95% Regulation
2.1
ms
RESET
Output Level Low
IRESET = 1mA
0.23
V
RESET
Output Leakage Current
Output Leakage Current
VFB = 1.01 x VFB-REG, TA = +25°C
1
µA
MAX17550
60V, 25mA, Ultra-Small, High-Efficiency
Synchronous Step-Down DC-DC Converter
with 22µA No-Load Supply Current
www.maximintegrated.com
Maxim Integrated │ 4
Electrical Characteristics (continued)



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