ADP2105: 1 Amp Synchronous, Step-Down DC-to-DC Converter
The ADP2105/ADP2106/ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP_VQ package. At medium to high load currents, these devices use a ...More
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ADP2105: 1 Amp Synchronous, Step-Down DC-to-DC Converter
Product Description
The ADP2105/ADP2106/ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP_VQ package. At medium to high load currents, these devices use a current-mode, constant-frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2105/ADP2106/ADP2107 use a pulse frequency modulation (PFM) control scheme under light load conditions that reduces switching frequency to save power.
The ADP2105/ADP2106/ADP2107 run from input voltages of 2.7 V to 5.5 V, allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cells, PCMCIA, and other standard power sources. The output voltage of ADP2105/ADP2106/ADP2107-ADJ is adjustable from 0.8 V to the input voltage, whereas the ADP2105/ADP2106/ADP2107-xx are available in preset output voltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 V. Each of these variations is available in three maximum current levels, 1 A (ADP2105), 1.5 A (ADP2106), and 2 A (ADP2107). The power switch and synchronous rectifier are integrated for minimal external part count and high efficiency. During logic-controlled shutdown, the input is disconnected from the output, and it draws less than 0.1 μA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and programmable soft start to limit inrush current at startup.
Applications
Data Sheet, Rev. A, 3/07
Средства разработки
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Features
- Extremely high 97% peak efficiency
- Internal primary and synchronous switches
- Fixed Frequency, Peak Current-Mode PWM at medium and high loads
- PSM operation at light loads for high efficiency
- Ultralow quiescent current: 30μA (max)
- Internally Set Current Limit
- Internal Thermal Protection
- 0.1 μA shutdown supply current (typ)
- Maximum duty cycle 100%
- Smoothly transitions into low dropout
(LDO) mode - Small 16-lead 4 mm × 4 mm
LFCSP_VD package - Optimized for small ceramic output capacitors
Diagrams
- Enlarge
- Другие диаграммы
- Обозначения и трафареты для печатной платы
Typical Application Circuit Diagram for ADP2105
1 Amp Synchronous, Step-Down DC-to-DC Converter
Другие диаграммы для ADP2105
1 Amp Synchronous, Step-Down DC-to-DC Converter
ADP2105 Pin Configuration
Typical Application Circuit Diagram for ADP2105
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| Part# | Vin Range | Vout Preset Options | Vout Adj Options | Iout (max) | Isw (Peak) | Supply Current (max) | Switching Frequency | Step Down | Step Up | Inverting | Pkg | Product Description | Price* (1000-4999) | Pos Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADP1111 | 2V-30V | 12.0V, 3.3V, 5.0V | 1.2V to 30V, 1.2V to Vin | 1.5A | 1.5A | 110µA | 70 kHz | Yes | Yes | Yes | Plastic DIP-8, SOIC-8 | Micropower Step Up/Down/Inverting Switching Regulator; Adjustable or Fixed 3.3V, 5V, 12V | $2.05 | +2 to +30 |
| ADP1611 | 2.5V-5.5V | --- | Vin to 20V | 1.2A | 1.2A | 600µA | 1.2 MHz | - | Yes | - | MSOP-8 | 20 V,1.2 MHz Step-Up DC-to-DC Switching Converter | $1.14 | +2.5 to +5.5 |
| ADP1610 | 2.5V-5.5V | --- | Vin to 12V | 1.2A | 1.2A | 600µA | 700 kHz or 1.2 MHz | - | Yes | - | MSOP-8 | 1.2 MHz DC-DC Step-Up (Boost) Switching Converter w/ Integrated Power Switch | $1.27 | +2.5 to +5.5 |
| ADP2102 | 2.7V-5.5V | 0.8V, 1.0V, 1.25V, 1.2V, 1.375V, 1.5V, 1.875V, 1.8V | 0.8V to 3.3V | 0.6A | - | 99µA | 3 MHz | Yes | - | - | LFCSP-8 | 3 MHz Synchronous Step-Down DC-to-DC Converter | $1.23 | +2.7 to +5.5 |
| ADP3051 | 2.7V-5.5V | --- | 0.8V to 5.5V | 0.5A | - | 300µA | 550 kHz | Yes | - | - | MSOP-8 | 500 mA PWM Step-Down DC-DC Converter with Synchronous Rectifier | $2.65 | +2.7 to +5.5 |
| ADP2105 | 2.7V-5.5V | 1.2V, 1.5V, 1.8V, 3.3V | 0.8V to Vin | 1A | - | 30µA | 1.2 MHz | Yes | - | - | LFCSP-16 | 1A Synchronous Step-Down DC-DC Converter | $1.13 | +2.7 to +5.5 |
| ADP2106 | 2.7V-5.5V | 1.2V, 1.5V, 1.8V, 3.3V | 0.8V to Vin | 1.5A | - | 30µA | 1.2 MHz | Yes | - | - | LFCSP-16 | 1.5A Synchronous Step-Down DC-DC Converter | $1.25 | +2.7 to +5.5 |
| ADP2107 | 2.7V-5.5V | 1.2V, 1.5V, 1.8V, 3.3V | 0.8V to Vin | 2A | - | 30µA | 1.2 MHz | Yes | - | - | LFCSP-16 | 2A Synchronous Step-Down DC-DC Converter | $1.32 | +2.7 to +5.5 |
| ADP3050 | 3.6V-30V | 3.3V, 5.0V | 1.25V to 12V | 1.5A | - | 1.5mA | 200 kHz | Yes | Yes | Yes | SOIC-8 | 200 kHz, 1 Amp, High-Voltage Step-Down Switching Regulator | $1.80 | +3.6 to +30 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.
ADP2105 Model Options
Help
- "Pre-Release": модель микросхемы еще не запущена в серийное производство, однако можно получить образцы.
- Производство: модель производится, доступна для покупки и заказа образцов.
- Завершение продаж: запланировано снятие модели микросхемы с производства, но в течение некоторого ограниченного времени покупка еще возможна.
- Снято с производства: Микросхема снята с производства и не доступна для приобретения. Другие варианты, указанные в таблице, все еще производятся (если их статус любой, кроме "снято с производства")
Для более подробного описания корпуса и материалов - см. Package Site
- Коммерческое исполнение: 0…70°С
- Военное исполнение: от -55 до +125 градусов по Цельсию
- Индустриальное исполнение: диапазоны рабочих температур могут быть разные у разных моделей. См. техническое описание (datasheet)
- Automotive: -40 to +125 °С
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*Приведенные цены действительны в США и указаны только для примерного бюджетного рассчета. Цены указаны в долларах США (за штуку в указанном размере партии) и могут быть изменены. Цены в других регионах могут отличаться в зависимости от местных пошлин, налогов, сборов и курсов валют. Для уточнения стоимости обращайтесь в местные офисы продаж Analog Devices, или к официальным дистрибьюторам. Цены на оценочные платы и наборы указаны за штуку независимо от количества.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.


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