Datasheet

Evaluates: MAX17503 in
5V Output-Voltage Application
MAX17503 5V Output Evaluation Kit
General Description
The MAX17503 5V output evaluation kit (EV kit) provides
a proven design to evaluate the MAX17503 high-voltage,
high-efficiency, synchronous step-down DC-DC convert-
er. The EV kit is preset for 5V output at load currents up
to 2.5A and features a 500kHz switching frequency for
optimum efficiency and component size. The EV kit
features adjustable input undervoltage lockout, adjust-
able soft-start, open-drain RESET signal, and external
frequency synchronization.
Features
● Operatesfroma6.5Vto60VInputSupply
● 5VOutputVoltage
● Upto2.5AOutputCurrent
● 500kHzSwitchingFrequency
● Enable/UVLOInput,Resistor-ProgrammableUVLO
Threshold
● AdjustableSoft-StartTime
● MODEPintoSelectAmongPWM,PFM,orDCM
Modes
● Open-DrainRESETOutput
● ExternalFrequencySynchronization
● OvercurrentandOvertemperatureProtection
● ProvenPCBLayout
● FullyAssembledandTested
19-6816; Rev 1; 12/13
Ordering Information appears at end of data sheet.
*EP = Exposed pad.
Note: C7, R1, and R2 are optional components; R1 and R2 are
not needed if the EN/UVLO pin is permanently connected to
VIN. The electrolytic capacitor (C7) is required only when the
VIN power supply is situated far from the MAX17503-based
circuit. When R5 is open, the device switches at 500kHz switch-
ing frequency.
DESIGNATION QTY DESCRIPTION
C1 1
2.2µF±10%,100VX7Rceramic
capacitor (1210)
MurataGRM32ER72A225KA35
C2 1
2.2µF±10%,10VX7Rceramic
capacitor(0603)
MurataGRM188R71A225K
C3 1
5600pF±10%,25VX7Rceramic
capacitor (0402)
MurataGRM155R71E562K
C4 1
22µF±10%,10VX7Rceramic
capacitor (1210)
MurataGRM32ER71A226K
C5 1
0.1µF±10%,16VX7Rceramic
capacitor (0402)
MurataGRM155R71C104K
C6 0
Not installed, ceramic capacitor
(0402)
C7 1
47µF,80Valuminumelectrolytic
capacitor (D = 10mm)
PanasonicEEEFK1K470P
JU1,JU2,JU3 3 3-pin headers
DESIGNATION QTY DESCRIPTION
L1 1
10µH,3.8Ainductor
CoilcraftMSS1048-103ML
TaiyoYudenNS10165T100MNA
R1 1 3.32MΩ±1%resistor(0402)
R2 1 732kΩ±1%resistor(0402)
R3 1 178kΩ±1%resistor(0402)
R4 1 39kΩ±1%resistor(0402)
R5 0 Not installed, resistor (0402)
R6 1
10kΩ±1%resistor(0402)
TP1,TP2 2 Test pads
U1 1
Buckconverter(20TQFN-EP*)
MaximMAX17503ATP+
— 3 Shunts(JU1,JU2,JU3)
— 1
PCB:MAX17503–5VOutput
EVKIT
Component List