ADI公司的ADP1607是一款高效、同步、固定頻率、升壓型DC/DC轉(zhuǎn)換器，主要應(yīng)用于便攜設(shè)備，輸出電壓可調(diào)范圍為1.8V至3.3V。該芯片具有2Mhz的固定輸出頻率、小封裝、同步矯正、內(nèi)部補(bǔ)償、內(nèi)部限流、輸出隔離、熱關(guān)斷、優(yōu)秀的瞬態(tài)響應(yīng)和外圍器件少等特點(diǎn)。本文通過(guò)總結(jié)ADP1607器件的特點(diǎn)，介紹器件、特性、應(yīng)用方向及內(nèi)部結(jié)構(gòu)框圖，并給參考設(shè)計(jì)實(shí)例主要特性、原理圖、制板圖及元器件清單。
The ADP1607 is a high efficiency, synchronous, fixed frequency, step-up dc-to-dc switching converter with an adjustable output voltage between 1.8 V and 3.3 V for use in portable applications.
The 2 MHz operating frequency enables the use of small footprint, low profile external components. Additionally, the synchronous rectification, internal compensation, internal fixed current limit, and current mode architecture allow for excellent transient response and a minimal external part count.
Other key features include fixed PWM and light load PFM mode options, true output isolation, thermal shutdown (TSD), and logic controlled enable. Available in a lead-free, thin, 6-lead LFCSP package, the ADP1607 is ideal for providing efficient power conversion in portable devices.
ADP1607主要特性：
Up to 96% efficiency
0.8 V to VOUT input voltage range
Low 0.9 V input start-up voltage
1.8 V to 3.3 V output voltage range
23 μA quiescent current
Fixed PWM and light load PFM mode options
Synchronous rectification
True shutdown output Isolation
Internal soft start, compensation, and current limit
2 mm × 2 mm, 6-lead LFCSP
Compact solution size
ADP1607應(yīng)用：
1-cell and 2-cell alkaline and NiMH/NiCd powered devices
Portable audio players, instruments, and medical devices
Solar cell applications
Miniature hard disk power supplies
Power LED status indicators
圖1. ADP1607方框圖
ADP1607參考設(shè)計(jì)主要特性：
0.8 V to VOUT input voltage range
Low 0.9 V input start-up voltage
Fixed 2 MHz PWM and light load PFM mode options
Auto PFM/PWM transition modes (ADP1607-EVALZ)
PWM mode only (ADP1607-001-EVALZ)
3.3 V output voltage
Jumper for enable/shutdown control
R1 and R2 selected for VOUT = 3.3 V output voltages
ADP1607設(shè)計(jì)原理圖：
圖2. ADP1607設(shè)計(jì)原理圖
ADP1607設(shè)計(jì)方案材料清單：
PCB元件布局圖：
