DC-DC преобразователи интегральные MAX757ESA+

Импульсный повышающий DC-DC стабилизатор , регулируемый, 0.7В-5.5В вход, 500кГц, 0.3А выход, NSOIC-8

The MAX757ESA+ from Maxim Integrated Products is a CMOS step-up DC to DC converter in 8 pin NSOIC package. This DC to DC switching regulator is used for small, low input voltage or battery powered systems. The device is an adjustable version that accepts an input voltage down to 0.7V and generates a higher adjustable output voltage in the range from 2.7V to 5.5V. The device has reduced physical size and high switching frequencies up to 0.5MHz which is made possible by MOSFET power transistors that allows for tiny (<5mm diameter) surface mount magnetics. Supply current is reduced to 60µA by CMOS construction and unique constant off time pulse frequency modulation control scheme. Applications include 3.3V to 5V step-up conversion, palmtop computers, portable data collection equipment, personal data communicators/computers, medical instrumentation, 2-cell and 3-cell battery operated equipments, glucose meters.

• Input voltage range from 700mV to 5.5V, operating temperature range from -40°C to 85°C
• 87% improved efficiency (10% better than low voltage regulators fabricated in bipolar technology)
• Output current of 300mA, FB voltage is 1.25V
• 20µA shutdown quiescent current with active reference, low battery detector (LBI
• LBO)
• ±1.5% reference tolerance over temperature
• 60µA quiescent current

Области применения

Управление Питанием, Медицинское, Потребительская Электроника, Переносные Устройства