MAX1744, MAX1745 µMAX 패키지로 제공되는 고전압, 스텝 다운 DC-DC 컨트롤러

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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.

주요기능

애플리케이션/용도

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

	자동차 전자장치
	FireWire®/IEEE 1394
	산업용 제어 시스템
	텔레콤 시스템
	월 큐브 (Wall Cube) 전력 장치

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Fixed Freq/PWM Operation

Operating Freq. (kHz)

Internal Power Switch(es)

Synchronous Rectifier

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX1744

Step-Down

4.5

3.3

0.14

330

uMAX/10

$2.75 @ 1k

MAX1745

1.25

Automotive - General

$2.75 @ 1k

See All Switch-Mode DC-DC Power Supplies (413)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.