Topology | Buck Converter |
Input voltage | 36-51 V |
Switching frequency | 100-2200 kHz |
Output 1 | 16 V / 4 A |
Output 2 | 24 V / 2 A |
The MAX17559 is a dual-output, synchronous step-downcontroller that drives nMOSFETs. The device uses aconstant-frequency, peak-current-mode architecture. Thetwo outputs can be configured as independent voltagerails. Input capacitor size is minimized by running the twooutputs 180° out of phase. The IC supports current sensingusing either an external current-sense resistor for accuracyor an inductor DCR for improved system efficiency. Currentfoldback or latch-off limits MOSFET power dissipationunder short-circuit conditions. The IC provides independentadjustable soft-starts/stops for each output and can startup monotonically into a pre-biased output. The IC can beconfigured in either PWM or DCM modes of operation,depending on whether constant-frequency operation orlight-load efficiency is desired. The IC operates over the-40°C to +125°C temperature range and is available in alead(Pb)-free, 7mm x 7mm, 32-pin TQFP, package.
Wide 4.5V to 60V Input Voltage RangeWide 0.8V to 24V Output Voltage RangeRSENSE or Inductor DCR Current-SensingFixed 180° Out-of-Phase OperationAdjustable 100kHz to 2.2MHz Switching FrequencyIndependent Enable and PGOODAvailable in a Lead(Pb)-Free 7mm x 7mm, 32-Pin TQFP PackageEnhances Power EfficiencyLow-Impedance Gate Drives for High EfficiencyDCM Operation at Light LoadsAuxiliary Bootstrap LDOOperates Reliably in Adverse Industrial EnvironmentsIndependent Adjustable Soft-Start/Stop or TrackingCurrent Selectable Foldback or Latch-off LimitsMOSFET Heat Dissipation During a Short-Circuit ConditionOperates Over the -40°C to +125°C Temperature RangeOutput Overvoltage and Overtemperature Protections
Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | IR (A) | RDC max. (mΩ) | Size | Version | Samples | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
74435572200 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 22 | 10.9 | 9 | 11 | 14.6 | 10.5 | MnZn | – | 15.77 | 1890 | SMT | |||
7447709470 | SPEC | 8 files | WE-PD SMT Power Inductor | 47 | 4.9 | 4.5 | 5.5 | – | 6.5 | – | 3.8 | 60 | 1210 | Standard |
Order Code | Datasheet | Simulation | |
---|---|---|---|
74435572200 | SPEC | ||
7447709470 | SPEC |
Samples |
---|
Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | IR (A) | RDC max. (mΩ) | Size | Version | Samples |
---|