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MAX17545 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Synchronous Step-Down DC-DC Converter - Maxim Integrated

भाग संख्या MAX17545
समारोह Synchronous Step-Down DC-DC Converter
मैन्युफैक्चरर्स Maxim Integrated 
लोगो Maxim Integrated लोगो 
पूर्व दर्शन
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<?=MAX17545?> डेटा पत्रक पीडीएफ

MAX17545 pdf
MAX17545
4.5V–42V, 1.7A, High-Efficiency,
Synchronous Step-Down DC-DC Converter
With Internal Compensation
Absolute Maximum Ratings
VIN to PGND..........................................................-0.3V to +48V
EN/UVLO to SGND................................................-0.3V to +48V
LX to PGND................................................-0.3V to (VIN + 0.3V)
BST to PGND.........................................................-0.3V to +53V
BST to LX..............................................................-0.3V to +6.5V
BST to VCC............................................................-0.3V to +48V
CF, RESET, SS, MODE, SYNC,
RT to SGND......................................................-0.3V to +6.5V
FB to SGND..........................................................-0.3V to +1.5V
VCC to SGND........................................................-0.3V to +6.5V
SGND to PGND.....................................................-0.3V to +0.3V
LX Total RMS Current............................................................±4A
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA = +70°C) (multilayer board)
TQFN (derate 30.3mW/°C above TA = +70°C).......2424.2mW
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +160°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability. Junction temperature greater than +125°C degrades operating lifetimes.
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)...........33°C/W
Junction-to-Case Thermal Resistance (θJC)..................2°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(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)
PARAMETER
INPUT SUPPLY (VIN)
Input Voltage Range
Input Shutdown Current
Input Quiescent Current
ENABLE/UVLO (EN/UVLO)
EN/UVLO Threshold
EN/UVLO Input Leakage Current
SYMBOL
CONDITIONS
VIN
IIN-SH
IQ_PFM
IQ-DCM
IQ_PWM
VEN/UVLO = 0V (shutdown mode)
VFB = 1V, MODE = RT = open
VFB = 1V, MODE = open
DCM mode, VLX = 0.1V
Normal switching mode, fSW = 500kHz,
VFB = 0.8V
VENR
VENF
IEN
VEN/UVLO rising
VEN/UVLO falling
VEN/UVLO = 0V, TA = +25ºC
MIN TYP MAX UNITS
4.5 42
2.8 4.5
118
162
1.16 1.8
9.5
V
µA
mA
1.19 1.215 1.26
1.068 1.09 1.131
-50 0 +50
V
nA
www.maximintegrated.com
Maxim Integrated 2

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डाउनलोड[ MAX17545 Datasheet.PDF ]


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