General Description

The MAX17536 high-efficiency, high-voltage, synchronous

step-down DC-DC converter with integrated high-side

MOSFET operates over a 4.5V to 60V input. The

converter can deliver up to 4A and generates output

voltage is accurate to within ±1.4% over -40°C to +125°C.

The MAX17536 uses peak current-mode control. The

device can be operated in the pulse-width modulation

(PWM), pulse-frequency modulation (PFM), and

discontinuous-conduction mode (DCM) control schemes.

The device is available in a 20-pin (5mm x 5mm) thin QFN

(TQFN) package. Simulation models are available.

Applications

● IndustrialPowerSupplies

● DistributedSupplyRegulation

● Base-StationPowerSupplies

● WallTransformerRegulation

● High-VoltageSingle-BoardSystems

● General-PurposePoint-of-Load

Benefits and Features

● ReducesExternalComponentsandTotalCost

• No Schottky-Synchronous Operation

• Internal Compensation for Any Output Voltage

• Built-In Soft-Start

• All-CeramicCapacitors,CompactLayout

● ReducesNumberofDC-DCRegulatorstoStock

• Wide 4.5V to 60V Input

• AdjustableOutputVoltageRangefrom0.9Vupto

• 100kHzto2.2MHzAdjustableSwitchingFrequency

withExternalSynchronization

● ReducesPowerDissipation

• PeakEfficiency>95%

• PFM/DCMModesEnablesEnhancedLight-LoadEfficiency

• AuxiliaryBootstrapLDOforImprovedEfficiency

• 3.5µA Shutdown Current

● OperatesReliablyinAdverseIndustrialEnvironments

• HiccuporLatchoffModeOverloadProtection

• DL-to-LXShortDetectionFeature

• Built-In Output-Voltage Monitoring with RESET

• ProgrammableEN/UVLOThreshold

• MonotonicStartupintoPrebiasedLoad

• Overtemperature Protection

• HighIndustrial-40oCto+125°CAmbient

OperatingTemperatureRange/-40°Cto+150°C

JunctionTemperatureRange

19-7586; Rev 2; 6/18

Ordering Information appears at end of data sheet.

MAX17536

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

Step-Down DC-DC Converter

with Internal Compensation

Typical Application Circuit for 5V Output

RESET

EN/UVLO

VIN

VIN

BST

RT

VIN

MODE/SYNC

VCC

SGND

CF

SS

FB

DL

PGND

LX

LX

LX

VIN

C11

22000pF

EXTVCC

2.2µF

2.2µF

2.2µF

0.1µF

4.7µH

47µF

5V,4A

196kΩ

43.2kΩ

MAX17536

L1 = XAL6060-472ME

N1 = SIS468DN

C6 = 2.2µF/X7R/10V/0603(MURATA GRM188R71A225K)

C8 = 47µF/X7R/10V/1210(MURATA GRM32ER71A476KE15)

C9 = C10 = 22µF/X7R/10V/1210(MURATA GRM32ER71A226K)

C13 = 0.1µF/50V/X7R/0402 (TDK C1005X7R1H104K050BB)

6.5V-60V

R3

C6

C7

C1

C2

C8

C9

R4

L1

N1

R1

4.7Ω

22µF

C10

22µF

C3

C4

C5

0.1µF

0.1µF

0.1µF

TYPICAL APPLICATION CIRCUIT FOR 5V OUTPUT

R8

C13

4.7Ω

0.1µF

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here for production status of specific part numbers.