The CXSB6603B05G0R-G is a synchronous buck-boost DC/DC converter IC with built-in FETs. The circuit topology switches over between buck and boost smoothly based on the relationship of the input voltage and the output voltage which is observed by the internal PWM controller. Due to the internal FETs, the number of external components is reduced. Also, a 6MHz switching frequency enables smaller external components, such as a coil and capacitors, to be used. The input voltage range is 2.5V~5.5V and the output voltage is adjustable from 0.8V to 5.0V by using external resistors since the reference voltage circuit is embedded internally. Synchronous topology provides high efficiency performance and the control method is selectable from either PWM mode (MODE pin: H) or PFM mode (MODE pin: L). Under PFM mode, the efficiency at light load current will be improved. When a “L” signal level is fed to the CE pin, the product is in stand-by mode and the consumption current is going to be 2.0uA (Max.) or less. Regarding other functions, the product has UVLO, thermal shutdown protection and soft-start. The soft-start time is approx. 100us and the output voltage can rise up quickly.
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产品概述 返回TOP
CXSB6600系列是内置高速低通态电阻驱动器的通用高频升降压DC/DC转换控制器。通过外置2个晶体管,线圈,二极管和电容器共4种元件，可构建大电流,高性能的升降压DC/DC转换器。在器件内，可在2.4V～6.0V(±2.5％)范围，以0.1V的间隔设定输出电压。由于开关频率高达180kHz，300kHz可使用小型外置元件。在小负载时，PWM/PFM切换控制型CXSB6601系列的工作从PWM工作模式切换为PFM工作模式。因此，能够在小负载至大输出电流整个负载范围内，达到高效工作。在内部设定了10ms的软启动时间，以此防止通电时的输入冲击电流和输出过冲电压。待机时(CE端"L")，通过使整个电路停止工作，将电流消耗控制在0.5μA以下。The CXSB6600/CXSB6601 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in. A versatile, large output current, step-up/down DC/DC converter can be realized using only 4 type of basic external components two transistors, one inductor, two diodes and capacitors. Output voltage is selectable in 0.1V increments within a 2.4V ~ 6.0V (±2.5% accuracy) range and switching frequency is set at 180kHz or 300kHz. The CXSB6601 series switches from PWM to PFM control during light loads and the series offers high efficiencies from light loads through to large output currents. Soft-start time is internally set to 10ms which offers protection against inrush currents when the power is turned on and also against voltage overshoot. During shutdown (CE pin = L), consumption current can be reduced to as little as 0.5μA or less.
产品特点 返回TOP
应用范围 返回TOP
●Mobile phones
●PDAs
●Palmtop computers
●Portable audio equipment
●Various power supplies
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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升降压型DC/DC转换器 |
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产品名称 |
封装 |
控制 |
VIN (MIN) |
VIN (MAX) |
VOUT (MIN) |
VOUT (MAX) |
IOUT IIN |
FB/VOUT电 压精度(%) |
振荡频 率(kHz) |
消耗电 流(μA) |
温度范 围(℃) |
|
(V) |
(V) |
(V) |
(V) |
(mA) |
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|
SOT25 |
PWM |
2 |
10 |
2.4 |
6 |
250 |
±2.5 |
180~300 |
15 |
-40～＋85 |
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|
SOT25 |
PWM/PFM |
2 |
10 |
2.4 |
6 |
250 |
±2.5 |
180~300 |
15 |
-40～＋85 |
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|
MSOP8A |
PWM/PFM |
2 |
10 |
2 |
6 |
800 |
±2.0 |
300 |
55 |
-40～＋85 |
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|
WLP20-01 |
PWM |
2.5 |
5.5 |
0.8 |
5 |
±2.0 |
6000 |
-40～＋85 |
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