Миниатюры Содержание документа Вложения Слои Текущий элемент структуры <#page=1> <#page=2> <#page=3> <#page=4> <#page=5> <#page=6> <#page=7> <#page=8> <#page=9> <#page=10> <#page=11> <#page=12> <#page=13> <#page=14> <#page=15> <#page=16> <#page=17> <#page=18> LP38691 LP38693 <#%5B%7B%22num%22%3A3%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C736.2%2Cnull%5D> General Description <#%5B%7B%22num%22%3A3%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C640.4%2Cnull%5D> Features <#%5B%7B%22num%22%3A3%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C640.4%2Cnull%5D> Applications <#%5B%7B%22num%22%3A3%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C480.095%2Cnull%5D> Typical Application Circuits <#%5B%7B%22num%22%3A3%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C396.78%2Cnull%5D> Connection Diagrams <#%5B%7B%22num%22%3A24%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> Pin Descriptions <#%5B%7B%22num%22%3A24%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C413.841%2Cnull%5D> Ordering Information <#%5B%7B%22num%22%3A45%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> Absolute Maximum Ratings <#%5B%7B%22num%22%3A51%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> Operating Ratings <#%5B%7B%22num%22%3A51%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C695.265%2Cnull%5D> Electrical Characteristics <#%5B%7B%22num%22%3A51%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C631.91%2Cnull%5D> Block Diagrams <#%5B%7B%22num%22%3A63%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> FIGURE 1. LP38691 Functional Diagram (LLP) <#%5B%7B%22num%22%3A63%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C466.992%2Cnull%5D> FIGURE 2. LP38691 Functional Diagram (TO-252) <#%5B%7B%22num%22%3A63%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C185.456%2Cnull%5D> FIGURE 3. LP38693 Functional Diagram (LLP) <#%5B%7B%22num%22%3A74%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C494.711%2Cnull%5D> FIGURE 4. LP38693 Functional Diagram (SOT-223) <#%5B%7B%22num%22%3A74%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C213.176%2Cnull%5D> Typical Performance Characteristics <#%5B%7B%22num%22%3A85%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> Application Hints <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> EXTERNAL CAPACITORS <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C714.6%2Cnull%5D> SELECTING A CAPACITOR <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C312.444%2Cnull%5D> Capacitor Characteristics <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C242.848%2Cnull%5D> CERAMIC <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C225.652%2Cnull%5D> TANTALUM <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C701.16%2Cnull%5D> REVERSE VOLTAGE <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C631.564%2Cnull%5D> PCB LAYOUT <#%5B%7B%22num%22%3A193%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C241.488%2Cnull%5D> LLP MOUNTING <#%5B%7B%22num%22%3A196%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C681%2Cnull%5D> RFI/EMI SUSCEPTIBILITY <#%5B%7B%22num%22%3A196%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C212.735%2Cnull%5D> OUTPUT NOISE <#%5B%7B%22num%22%3A196%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C410.92%2Cnull%5D> Physical Dimensions <#%5B%7B%22num%22%3A199%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2Cnull%2C738.6%2Cnull%5D> Назад Далее Подсветить все С учётом регистра Match Diacritics Слова целиком Режим презентации Открыть Печать Загрузить Текущий вид <#page=1&zoom=auto,-52,785> Перейти на первую страницу Перейти на последнюю страницу Повернуть по часовой стрелке Повернуть против часовой стрелки Инструмент «Выделение текста» Инструмент «Рука» Прокрутка страниц Вертикальная прокрутка Горизонтальная прокрутка Масштабируемая прокрутка Без разворотов страниц Нечётные страницы слева Чётные страницы слева Свойства документа… Показать/скрыть боковую панель Найти Предыдущая Следующая из 18 Режим презентации Открыть Печать Загрузить Загрузить Текущий вид <#page=1&zoom=auto,-52,785> Инструменты Уменьшить Увеличить LP38691 LP38693 June 27, 2011 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors General Description The LP38691/3 low dropout CMOS linear regulators provide tight output tolerance (2.0% typical), extremely low dropout voltage (250 mV @ 500mA load current, VOUT = 5V), and ex- cellent AC performance utilizing ultra low ESR ceramic output capacitors. The low thermal resistance of the LLP, SOT-223 and TO-252 packages allow the full operating current to be used even in high ambient temperature environments. The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 μA regardless of load current, input volt- age, or operating temperature. Dropout Voltage: 250 mV (typ) @ 500mA (typ. 5V out). Ground Pin Current: 55 μA (typ) at full load. Precision Output Voltage: 2.0% (25°C) accuracy. Features ■ All LLP options are available as AEC-Q100 Grade 1 ■ 2.0% output accuracy (25°C) ■ Low dropout voltage: 250 mV @ 500mA (typ, 5V out) ■ Wide input voltage range (2.7V to 10V) ■ Precision (trimmed) bandgap reference ■ Guaranteed specs for -40°C to +125°C ■ 1μA off-state quiescent current ■ Thermal overload protection ■ Foldback current limiting ■ T0-252, SOT-223 and 6-Lead LLP packages ■ Enable pin (LP38693) Applications ■ Hard Disk Drives ■ Notebook Computers ■ Battery Powered Devices ■ Portable Instrumentation Typical Application Circuits 20126501 20126502 Note: * Minimum value required for stability. **LLP package devices only. © 2011 National Semiconductor Corporation 201265 www.national.com LP38691/LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors Connection Diagrams 20126503 TO-252, Top View LP38691DT-X.X 20126504 SOT-223, Top View LP38693MP-X.X 20126505 6-Lead LLP, Top View LP38691SD-X.X 20126506 6-Lead LLP, Top View LP38693SD-X.X Pin Descriptions Pin Description VIN This is the input supply voltage to the regulator. For LLP devices, both VIN pins must be tied together for full current operation (250mA maximum per pin). GND Circuit ground for the regulator. For the TO-252 and SOT-223 packages this is thermally connected to the die and functions as a heat sink when the soldered down to a large copper plane. SNS Output sense pin allows remote sensing at the load which will eliminate the error in output voltage due to voltage drops caused by the resistance in the traces between the regulator and the load. This pin must be tied to VOUT. VEN The enable pin allows the part to be turned ON and OFF by pulling this pin high or low. VOUT Regulated output voltage DAP LLP Only - The DAP (Exposed Pad) functions as a thermal connection when soldered to a copper plane. See LLP MOUNTING section in Application Hints for more information. www.national.com 2 LP38691/LP38693 <#ns15852> <#ns14827> Детали Скрыть детали Закрыть Введите пароль, чтобы открыть этот PDF-файл. 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