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MAXIM MAX1745AUB+T product image
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MAXIM MAX1745AUB+T

Manufacturer
MAXIM
MPN
MAX1745AUB+T
LCSC Part #
C2658030
Packaging
MSOP-10
Customer #
Key Attributes
1 Adjustable 1.25V~18V Step-down type MSOP-10 DC DC Switching Controllers RoHS
DatasheetMAXIM MAX1745AUB+T
RoHS Compliance1 documents available
Alternative Parts1
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerMAXIM
PackagingMSOP-10
Synchronous RectifierNo
Operating Temperature-40℃~+125℃@(TJ)
FeaturesLight load efficient mode;Built-in LDO regulator;Overcurrent Protection
Output Current-
Number of Channels1
TopologyBuck
Frequency - Switching330kHz
Operating Voltage4.5V~36V
Output TypeAdjustable
Switch tube (built-in/external)External
Output Voltage1.25V~18V
FunctionStep-down type
Quiescent Current90uA
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Introduction

AI Translation

The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage. The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V. The MAX1744/MAX1745 are available in a space-saving 10-pin μMAX package.

The MAX1744/MAX1745 are high-voltage step-down DC-DC converter controllers. These devices offer high efficiency over a wide range of input/output voltages and currents, making them optimal for use in applications such as telecom, automotive, and industrial control. Using an external P-channel MOSFET and current-sense resistor allows design flexibility and improved efficiency. The MAX1744/MAX1745 automatically switch from PWM operation at medium and heavy loads to pulse-skipping operation at light loads to improve light-load efficiency. The low 90μA quiescent current further optimizes these parts for applications where low input current is critical. Operation to 100% duty cycle allows the lowest possible dropout voltage, which allows a wider input voltage variation. The small size, high switching frequency, and low parts count minimize the required circuit board area and component cost.

Features

AI Translation
  • High-Voltage Operation (Up to 36V IN)
  • Efficiency >90%
  • Output Power Capability Exceeds 50W
  • 10-Pin μMax Package
  • Low-Dropout Voltage
  • 100% (max) Duty Cycle
  • 90μA Quiescent Current
  • 4μA Shutdown Current
  • Up to 330kHz Switching Frequency
  • Output Voltage: 5V or 3.3V (MAX1744); Adjustable 1.25V to 18V (MAX1745)
  • Current-Limited Control Scheme

Applications

AI Translation
  • Automotive Electronics
  • Telecom Systems
  • Wall-Cube-Powered Devices
  • Industrial Control Systems
  • Firewire/IEEE 1394