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MAX17559 Datasheet, PDF (1/28 Pages) Maxim Integrated Products – 60V, Dual-Output, Synchronous Step-Down Controller | |||
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MAX17559
EVALUATION KIT AVAILABLE
60V, Dual-Output, Synchronous
Step-Down Controller
General Description
The MAX17559 is a dual-output, synchronous step-down
controller that drives nMOSFETs. The device uses a
constant-frequency, peak-current-mode architecture.
The two outputs can be configured as independent
voltage rails. Input capacitor size is minimized by running
the two outputs 180° out-of-phase.
The IC supports current sensing using either an external
current-sense resistor for accuracy or an inductor DCR for
improved system efficiency. Current foldback or latchoff limits
MOSFET power dissipation under short-circuit conditions.
The IC provides independent adjustable soft-start/stop
for each output and can start up monotonically into a
prebiased output. The IC can be configured in either
PWM or DCM modes of operation, depending on whether
constant-frequency operation or light-load efficiency is
desired.
The IC operates over the -40°C to +125°C temperature
range and is available in a lead(Pb)-free, 7mm x 7mm,
32-pin TQFP, package.
Applications
ââ Industrial Power Supplies
ââ Distributed DC Power Systems
ââ Motion Control
ââ Programmable Logic Controllers
ââ Computerized Numerical Control
Benefits and Features
ââ Wide Range of Operation
⢠Wide 4.5V to 60V Input Voltage Range
⢠Wide 0.8V to 24V Output Voltage Range
⢠RSENSE or Inductor DCR Current-Sensing
⢠Fixed 180° Out-of-Phase Operation
⢠Adjustable 100kHz to 2.2MHz Switching Frequency
⢠Independent Enable and PGOOD
⢠Available in a Lead(Pb)-Free 7mm x 7mm, 32-Pin
TQFP Package
ââ Enhances Power Efficiency
⢠Low-Impedance Gate Drives for High Efficiency
⢠DCM Operation at Light Loads
⢠Auxiliary Bootstrap LDO
ââ Operates Reliably in Adverse Industrial Environments
⢠Independent Adjustable Soft-Start/Stop or Tracking
⢠Current Selectable Foldback or Latchoff Limits
MOSFET Heat Dissipation During a Short-Circuit
Condition
⢠Operates Over the -40°C to +125°C Temperature
Range
⢠Output Overvoltage and Overtemperature Protections
Ordering Information appears at end of data sheet.
19-7660; Rev 0; 6/15
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