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High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package

DC-DC Regulators for 3.3V/5V Optimized for Minimizing Space and Providing Great Efficiency

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.9
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5
IOUT1 (A) (max) 4
Switch Type Internal
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools EE-Sim
Package/Pins WLP/16
Budgetary
Price (See Notes)
1.73
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.9
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 5
IOUT1 (A) (max) 4
Switch Type Internal
Output Adjust. Method Dyn. REF In
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=1929', '')
Package/Pins WLP/16
Budgetary
Price (See Notes)
1.73

Key Features

  • Internal 18mΩ RDS(ON) MOSFETs
  • Pulse-Skip Mode for High-Efficiency Light Load (MAX15050)
  • Continuous 4A Output Current
  • ±1% Output-Voltage Accuracy Over Load, Line, and Temperature
  • Operates from 2.9V to 5.5V Supply
  • Adjustable Output from 0.6V to (0.9 x VIN)
  • Adjustable Soft-Start Reduces Inrush Supply Current
  • Factory-Trimmed 1MHz Switching Frequency
  • Compatible with Ceramic, Polymer, and Electrolytic Output Capacitors
  • Safe Startup Into Prebias Output
  • Enable Input/Power-Good Output
  • Fully Protected Against Overcurrent and Overtemperature
  • Overload Hiccup Protection
  • Sink/Source Current for DDR Applications
  • 2mm x 2mm, 16-Bump (4 x 4 Array), 0.5mm Pitch WLP Package

Applications/Uses

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • Point-of-Load
  • Portable Applications
  • RAID Control Power Supplies
  • Server Power Supplies
  • Telecom and Networking Power Supplies

Description

The MAX15050/MAX15051 high-efficiency switching regulators deliver up to 4A load current at output voltages from 0.6V to (0.9 x VIN). The devices operate from 2.9V to 5.5V, making them ideal for on-board point-of-load and postregulation applications. Total output-voltage accuracy is within ±1% over load, line, and temperature.

The MAX15050/MAX15051 feature 1MHz fixed-frequency PWM operation. The MAX15050 features pulse-skip mode to improve light-load efficiency. The MAX15050 soft-starts in a monotonic mode and then operates in the forced PWM mode or pulse-skip mode depending on the output load current condition. The MAX15051 soft-starts in the monotonic mode and operates in the forced PWM mode. The high operating frequency allows for small-size external components.

The low-resistance on-chip nMOS switches ensure high efficiency at heavy loads while minimizing critical parasitic inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The MAX15050/MAX15051 incorporate a high-bandwidth (> 26MHz) voltage-error amplifier. The voltage-mode control architecture and the voltage-error amplifier permit a type III compensation scheme to achieve maximum loop bandwidth, up to 200kHz. High loop bandwidth provides fast transient response, resulting in less required output capacitance and allowing for all-ceramic capacitor designs.

The MAX15050/MAX15051 feature an output overload hiccup protection and peak current limit on both high-side and low-side MOSFETs. These features provide for ultra-safe operation in the cases of short-circuit conditions, severe overloads, or in converters with bulk electrolytic capacitors.

The MAX15050/MAX15051 feature an adjustable output voltage. The output voltage is adjustable by using two external resistors at the feedback or by applying an external reference voltage to the REFIN/SS input. The MAX15050/MAX15051 offer programmable soft-start time using one capacitor to reduce input inrush current. A built-in thermal shutdown protection assures safe operation under all conditions. The MAX15050/MAX15051 are available in a 2mm x 2mm, 16-bump (4 x 4 array), 0.5mm pitch WLP package.

Simplified Block Diagram

MAX15050, MAX15051: Typical Operating Circuit MAX15050, MAX15051: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .