L5973AD

STMicroelectronics
DC-DC преобразователь интегральный - [SOIC-8-3.9]; Тип: Buck; Uвх: 4...36 В; Uвых: 1.24...36 В; Рег.вых.: ADJ; Iвых: 1.5 А; Опции: INT_SWITCH
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Технические характеристики

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Корпус HSOIC8
Тип преобразователя
Режим преобразования
Входное напряжение
Выходное напряжение
Максимальный выходной ток
Кол-во выходов
Частота преобразования
Встроенные возможности INT_SWITCH, Thermal Shutdown, Current Limit, External Sync.
Примечание Up to 1.5 A step down switching regulator
Рабочая температура
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Аналоги 1

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Тип Наименование Корпус Упаковка i Тип Режим Uвх Uвых Iвых Выходов F преобр Iпотр nmax Опции Примечание T раб Карточка
товара
P= L5973ADTR (ST)
 
HSOIC8 в ленте 2500 шт
 
 — — INT_SWITCH, Thermal Shutdown, Current Limit, External Sync. Up to 1.5 A step down switching regulator

Файлы 2

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L5973AD 2 A switch step down switching regulator Features ■ 2 A internal switch ■ Operating input voltage from 4 V to 36 V ■ 3.3 V / (±2%) reference voltage ■ Output voltage adjustable from 1.235 V to 35 V ■ Low dropout operation: 100% duty cycle ■ 500 kHz Internally fixed frequency ■ Voltage feedforward ■ Zero load current operation ■ Internal current limiting ■ Inhibit for zero current consumption ■ Synchronization ■ Protection against feedback disconnection ■ Thermal shutdown HSOP8 exposed pad Description The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2 A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W. The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency. An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection. Applications ■ Consumer: STB, DVD, TV, VCR, car radio, LCD monitors ■ Networking: XDSL, modems, DC-DC modules ■ Computer: printers, audio/graphic cards, optical storage, hard disk drive ■ Industrial: chargers, car battery, DC-DC converters Figure 1. Test application circuit VREF 3.3V VCC VIN = 4V to 35V SYNC. C1 10μF 35V CERAMIC COMP C4 22nF C3 220pF 6 8 2 1 OUT D1 STPS340U L5973AD 3 4 INH 7 L1 15μH VOUT=3.3V R1 5.6K 5 FB GND R3 4.7K C2 330μF 10V R2 3.3K D03IN1453 November 2009 Doc ID 9552 Rev 9 1/22 www.st.com 22 PDF
Документация на L5973AD 

2 A switch step down switching regulator

Дата модификации: 02.11.2009

Размер: 483.8 Кб

22 стр.

L5973AD 2 A switch step down switching regulator Features ■ 2 A internal switch ■ Operating input voltage from 4 V to 36 V ■ 3.3 V / (±2%) reference voltage ■ Output voltage adjustable from 1.235 V to 35 V ■ Low dropout operation: 100% duty cycle ■ 500 kHz Internally fixed frequency ■ Voltage feedforward ■ Zero load current operation ■ Internal current limiting ■ Inhibit for zero current consumption ■ Synchronization ■ Protection against feedback disconnection ■ Thermal shutdown HSOP8 exposed pad Description The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2 A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W. The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency. An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection. Applications ■ Consumer: STB, DVD, TV, VCR, car radio, LCD monitors ■ Networking: XDSL, modems, DC-DC modules ■ Computer: printers, audio/graphic cards, optical storage, hard disk drive ■ Industrial: chargers, car battery, DC-DC converters Figure 1. Test application circuit VREF 3.3V VCC VIN = 4V to 35V SYNC. C1 10μF 35V CERAMIC COMP C4 22nF C3 220pF 6 8 2 1 OUT D1 STPS340U L5973AD 3 4 INH 7 L1 15μH VOUT=3.3V R1 5.6K 5 FB GND R3 4.7K C2 330μF 10V R2 3.3K D03IN1453 November 2009 Doc ID 9552 Rev 9 1/22 www.st.com 22 PDF
Документация на серию L5973AD 

2 A switch step down switching regulator Datasheet;L5973AD

Дата модификации: 02.11.2009

Размер: 486.4 Кб

22 стр.

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