PIN

NAME

FUNCTION

12

SS

Soft-StartInput.ConnectacapacitorfromSStoSGNDtosetthesoft-starttime.

13

EN/UVLO

Enable/UndervoltageLockout.DriveEN/UVLOhightoenabletheoutputvoltage.Connecttothecenter

16

BST

BoostFlyingCapacitor.Connecta0.1µFceramiccapacitorbetweenBSTandLX.

17–19

LX

SwitchingNode.ConnectLXpinstotheswitchingsideoftheinductor.

20

DL

UseDLpintodrivethegateofthelow-sideexternalnMOSFET.AresistorconnectedbetweentheDLpin

andSGNDselectstheoverload-protectionmethodandthepeakandrunawaycurrentlimits.Connecta

4.7ΩresistorbetweentheDLpinandthegateofthelow-sideexternalnMOSFET.SeetheOvercurrent

Protection/Hiccup Mode section for more details.

—

EP

AlwaysconnectEPtotheSGNDpinoftheIC.Also,connectEPtoalargeSGNDplanewithseveral

thermalviasforbestThermalperformance.RefertotheMAX17536EVkitdatasheetforanexampleof

the correct method for EP connection and thermal vias.

SGND

EXTVCC

MODE/SYNC

SS

HICCUP

RT

RESET

EN/UVLO

OSCILLATOR

CURRENT SENSE

LOGIC

MAX17536

1.215V

5µA

LDO

SELECT

PWM/

PFM/

HICCUP LOGIC

MODE SELECTION

LOGIC

SLOPE COMPENSATION

SWITCHOVER LOGIC

ERROR AMPLIFIER/

LOOP COMPENSATION

HICCUP

FB

CF

RESET LOGIC

FB

EN/UVLO

BST

LX

DL

PGND

Maxim Integrated │ 11

MAX17536

4.5V to 60V, 4A, High-Efficiency, Synchronous

Step-Down DC-DC Converter

with Internal Compensation

www.maximintegrated.com

Pin Description (continued)

Block Diagram