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TC1303C-YQ0EMF

更新时间: 2024-10-28 05:30:35
品牌 Logo 应用领域
美国微芯 - MICROCHIP 开关控制器开关式稳压器开关式控制器光电二极管电源电路开关式稳压器或控制器
页数 文件大小 规格书
38页 755K
描述
0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10, 3 X 3 MM, 0.9 MM HEIGHT, PLASTIC, DFN-10

TC1303C-YQ0EMF 数据手册

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TC1303A/TC1303B/  
TC1303C/TC1304  
500 mA Synchronous Buck Regulator,  
+ 300 mA LDO with Power-Good Output  
Features  
Description  
• Dual-Output Regulator (500 mA Buck Regulator  
and 300 mA Low-Dropout Regulator)  
The  
TC1303/TC1304  
combines  
a
500 mA  
synchronous buck regulator and 300 mA Low-Dropout  
Regulator (LDO) with a power-good monitor to provide  
a highly integrated solution for devices that require  
multiple supply voltages. The unique combination of an  
integrated buck switching regulator and low-dropout  
linear regulator provides the lowest system cost for  
dual-output voltage applications that require one lower  
processor core voltage and one higher bias voltage.  
• Power-Good Output with 300 ms Delay  
Total Device Quiescent Current = 65 µA, Typical  
• Independent Shutdown for Buck and LDO  
Outputs (TC1303)  
• Both Outputs Internally Compensated  
• Synchronous Buck Regulator:  
- Over 90% Typical Efficiency  
The 500 mA synchronous buck regulator switches at a  
fixed frequency of 2.0 MHz when the load is heavy,  
providing a low noise, small-size solution. When the  
load on the buck output is reduced to light levels, it  
changes operation to a Pulse Frequency Modulation  
(PFM) mode to minimize quiescent current draw from  
the battery. No intervention is necessary for smooth  
transition from one mode to another.  
- 2.0 MHz Fixed-Frequency PWM  
(Heavy Load)  
- Low Output Noise  
- Automatic PWM to PFM mode transition  
- Adjustable (0.8V to 4.5V) and Standard  
Fixed-Output Voltages (0.8V, 1.2V, 1.5V,  
1.8V, 2.5V, 3.3V)  
The LDO provides a 300 mA auxiliary output that  
requires a single 1 µF ceramic output capacitor,  
minimizing board area and cost. The typical dropout  
voltage for the LDO output is 137 mV for a 200 mA  
load.  
• Low-Dropout Regulator:  
- Low-Dropout Voltage = 137 mV Typical @  
200 mA  
- Standard Fixed-Output Voltages  
(1.5V, 1.8V, 2.5V, 3.3V)  
For the TC1303/TC1304, the power-good output is  
based on the regulation of the buck regulator output, the  
LDO output or the combination of both. The TC1304  
features start-up and shutdown output sequencing.  
• Power-Good Function:  
- Monitors Buck Output Function (TC1303A)  
- Monitors LDO Output Function (TC1303B)  
- Monitors Both Buck and LDO Output  
Functions (TC1303C and TC1304)  
The TC1303/TC1304 is available in either the 10-pin  
DFN or MSOP package.  
- 300 ms Delay Used for Processor Reset  
• Sequenced Startup and Shutdown (TC1304)  
• Small 10-pin 3x3 DFN or MSOP Package Options  
• Operating Junction Temperature Range:  
- -40°C to +125°C  
Additional protection features include: UVLO,  
overtemperature and overcurrent protection on both  
outputs.  
For a complete listing of TC1303/TC1304 standard  
parts, consult your Microchip representative.  
• Undervoltage Lockout (UVLO)  
• Output Short Circuit Protection  
• Overtemperature Protection  
Applications  
• Cellular Phones  
• Portable Computers  
• USB-Powered Devices  
• Handheld Medical Instruments  
• Organizers and PDAs  
© 2008 Microchip Technology Inc.  
DS21949C-page 1  

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