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MAX17504 Datasheet(PDF) 10 Page - Maxim Integrated Products

Part # MAX17504
Description  Step-Down DC-DC Converter with Internal Compensation
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX17504 Datasheet(HTML) 10 Page - Maxim Integrated Products

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Maxim Integrated │ 10
MAX17504
4.5V–60V, 3.5A, High-Efficiency, Synchronous
Step-Down DC-DC Converter
with Internal Compensation
www.maximintegrated.com
Pin Description
Pin Configuration
PIN
NAME
FUNCTION
1, 2, 3
VIN
Power-Supply Input. 4.5V to 60V input supply range. Connect the VINpinstogether.DecoupletoPGND
with two 2.2µF capacitors; place the capacitors close to the VINandPGNDpins.RefertotheMAX17504
Evaluation Kit datasheet for a layout example.
4
EN/UVLO
Enable/Undervoltage Lockout. Drive EN/UVLO high to enable the output voltage. Connect to the center
of the resistor-divider between VINandSGNDtosettheinputvoltageatwhichtheMAX17504turnson.
Pull up to VIN for always on operation.
5
RESET Open-Drain RESET Output. The RESET output is driven low if FB drops below 92% of its set value.
RESET goes high 1024 clock cycles after FB rises above 95% of its set value.
6
SYNC
Thedevicecanbesynchronizedtoanexternalclockusingthispin.SeetheExternal Frequency
Synchronization section for more details.
7
SS
Soft-StartInput.ConnectacapacitorfromSStoSGNDtosetthesoft-starttime.
8
CF
Atswitchingfrequencieslowerthan500kHz,connectacapacitorfromCFtoFB.LeaveCFopenifthe
switchingfrequencyisequaltoormorethan500kHz.SeetheLoop Compensation section for more
details.
9
FB
FeedbackInput.ConnectFBtothecentertapofanexternalresistor-dividerfromtheoutputtoSGNDto
set the output voltage. See the Adjusting Output Voltage section for more details.
10
RT
ConnectaresistorfromRTtoSGNDtosettheregulator’sswitchingfrequency.LeaveRTopenforthe
default500kHzfrequency.SeetheSetting the Switching Frequency (RT) section for more details.
11
MODE
MODEconfigurestheMAX17504tooperateinPWM,PFMorDCMmodesofoperation.LeaveMODE
unconnectedforPFMoperation(pulseskippingatlightloads).ConnectMODEtoSGNDforconstant-
frequency PWM operation at all loads. Connect MODE to VCC for DCM operation. See the Mode
Selection (MODE) section for more details.
19
20
* EXPOSED PAD (CONNECT TO SIGNAL GROUND).
18
17
7
6
8
9
12
LX
45
15
14
12
11
LX
BST
FB
CF
SS
SYNC
+
3
13
LX
16
10 RT
PGND
TQFN
5mm × 5mm
MAX17504
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