UC3666

UC3666

  • 厂商:

    UTC(友顺)

  • 封装:

  • 描述:

    UC3666 - DUAL CHANNEL 800mA HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER - Unisonic Technologies

  • 详情介绍
  • 数据手册
  • 价格&库存
UC3666 数据手册
UNISONIC TECHNOLOGIES CO., LTD UC3666 Preliminary CMOS IC DUAL CHANNEL 800mA HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER DESCRIPTION The UTC UC3666 is a dual channel high efficiency step-down DC/DC converter with constant frequency and current mode. A main switch and a synchronous rectifier for high efficiency are contained in each converter, and thus an external Schottky diode is saved. Supply current is only 300μA during normal operation and is reduced to less than 1μA in shutdown mode. The output voltage can be adjusted to as low as 0.6V. With input voltage range from 2.5V ~ 5.5V , each converter can deliver 800mA current to the load. Due to the internally fixed 1.8MHz switching frequency , small surface mount inductors and capacitors can be used. It can also run 100% duty cycle for low dropout applications. The UTC UC3666 is generally used in digital still cameras, portable instruments, slim-type DVD, microprocessors and DSP core supplies, wireless and DSL card, PDAs, smart phones, cellular telephones and so on. 1 SON-10 FEATURES * high efficiency * Current mode operation * Low quiescent current less than 300uA (Active mode) * Input voltage varying from 2.5V to 5.5V * Output current on each channel: 800mA * Fixed frequency operation * 0 - 100% full duty ratio in dropout * 0.6V reference allows low output voltages * Over-temperature protection circuit * Shutdown current less than 0.1μA * RoHS Compliant (100% green available) * Halogen Free ORDERING INFORMATION Ordering Number Lead Free Halogen Free UC3666L-B10-R UC3666G-B10-R Note: xx: Output Voltage, refer to Marking Information. Package SON-10 Packing Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 8 QW-R502-489.a UC3666 PIN CONFIGURATION Preliminary CMOS IC Top View EN1 FB1 VIN2 GND2 SW2 1 2 3 4 5 Exposed Pad On Backside 10 SW1 9 8 7 6 GND1 VIN1 FB2 EN2 PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 PIN NAME EN1 FB1 VIN2 GND2 SW2 EN2 FB2 VIN1 GND1 SW1 DESCRIPTION Channel 1 Regulator Enable Control Input Pin. Drive EN1 above 1.5V to turn on channel1. Drive EN1 below 0.3V to turn it off (shutdown current < 0.1uA). Channel 1 Voltage Feedback Pin Channel 2 Supply Pin Channel 2 Ground Pin Channel 2 Power Switch Output Channel 2 Regulator Enable Control Input Pin. Drive EN2 above 1.5V to turn on channel2. Drive EN2 below 0.3V to turn it off (shutdown current < 0.1uA). Channel 2 Voltage Feedback Pin Channel 1 Supply Pin Channel 1 Ground Pin Channel 1 Power Switch Output UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 8 QW-R502-489.a UC3666 BLOCK DIAGRAM Preliminary CMOS IC VIN1 VIN2 EN1 EN2 Reference + Current Sense Amplifier EN Logic UVLO + - Soft Start Slop Comp M1 UG 0.6V + + Error Amplifier PWM Comparator PWM Logic RS & Drive M2 Oscillator Clock LG SW1 SW2 FB1 FB2 DCC Zero-Current Comparator + GND1 GND2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 8 QW-R502-489.a UC3666 ABSOLUTE MAXIMUM RATING Preliminary CMOS IC PARAMETER SYMBOL RATINGS UNIT Input Supply Voltage VIN GND-0.3 ~ +6.5 V SW Voltage -0.3 ~ VIN +0.3 V ENB, VFB Voltage -0.3 ~ VIN V SW Peak Current 1.5 A ESD Classification Class 2 Junction Temperature TJ 125 °C Operating Temperature Torp -20 ~ +85 °C Storage Temperature Range TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. The IC has a protection circuit against static electricity. Do not apply high static electricity or high voltage that exceeds the performance of the protection circuit to the IC. THERMAL DATA PARAMETER Junction ambient specified; VIN=3.6V, TA=0 ~ 70°C (typical=25°C)) PARAMETER Supply Voltage Feedback Current Regulated Feedback Voltage Reference Voltage Line Regulation Output Voltage Line Regulation Output Voltage Load Regulation Shutdown Current SW Leakage Current PMOSFET On Resistance NMOSFET On Resistance PMOSFET Current Limit Oscillator Frequency Thermal Shutdown Threshold EN High Level Input Voltage EN Low Level Input Voltage EN Input Current SYMBOL VIN IVFB VFB ΔVFB ΔVOUT VLOADRGE IS ILEAK RDSONP RDSONN IPCL fOSC TS VEN VEN IEN TEST CONDITIONS MIN 2.5 -30 0.588 0.582 TYP 0.5 0.6 0.6 0.04 0.04 0.5 0.01 0.35 0.24 0.9 1.2 -40°C≤TA≤+85°C -40°C≤TA≤+85°C VEN=0V ~ VIN 0.9 -1 0.3 1 1.2 1.6 145 MAX UNIT 5.5 V 30 nA 0.612 V 0.618 V 0.4 %V 0.4 %V % 1 µA 1 µA Ω Ω 1.4 2.0 A MHZ °C V V µA SYMBOL θJA TYP MAX 50 UNIT °C/W ELECTRICAL CHARACTERISTICS (Recommended Operating Conditions, unless otherwise TA=25°C -40°C≤TA≤85°C VIN=2.5V ~ 5.5V VIN=2.5V ~ 5.5V VEN=0V, VIN=5.5V VEN=0V, VIN=5.5V, VSW=0V or 5.5V ISW=100mA ISW=100mA Duty Cycle=100% Current Pulse Width
UC3666
1. 物料型号: - 型号:UC3666 - 订购型号:UC3666L-B10-R(无卤版)和UC3666G-B10-R(无铅版)

2. 器件简介: - UTC UC3666是一款双通道、高效率、降压型DC/DC转换器,具有恒定频率和电流模式。每个转换器包含一个主开关和一个同步整流器,以提高效率,从而节省了外部肖特基二极管。在正常操作时,供电电流仅为300μA,在关闭模式下降至小于1μA。输出电压可以调整至低至0.6V。输入电压范围从2.5V至5.5V,每个转换器可向负载提供高达800mA的电流。由于内部固定的1.8MHz开关频率,可以使用小型表贴式电感器和电容器。它还可以在低 dropout 应用中运行100%占空比。

3. 引脚分配: - 1号引脚(EN1):通道1使能控制输入引脚。驱动EN1高于1.5V以开启通道1,驱动EN1低于0.3V以关闭它(关闭模式下电流<0.1μA)。 - 2号引脚(FB1):通道1电压反馈引脚。 - 3号引脚(VIN2):通道2供电引脚。 - 4号引脚(GND2):通道2地引脚。 - 5号引脚(SW2):通道2功率开关输出。 - 6号引脚(EN2):通道2使能控制输入引脚。驱动EN2高于1.5V以开启通道2,驱动EN2低于0.3V以关闭它(关闭模式下电流<0.1μA)。 - 7号引脚(FB2):通道2电压反馈引脚。 - 8号引脚(VIN1):通道1供电引脚。 - 9号引脚(GND1):通道1地引脚。 - 10号引脚(SW1):通道1功率开关输出。

4. 参数特性: - 高效率。 - 电流模式操作。 - 低静态电流,活动模式下小于300μA。 - 输入电压从2.5V到5.5V变化。 - 每个通道输出电流:800mA。 - 固定频率操作。 - 在dropout时0-100%全占空比。 - 0.6V参考允许低输出电压。 - 过温保护电路。 - 关闭模式下电流小于0.1μA。 - 符合RoHS(100%绿色可用)。 - 无卤素。

5. 功能详解: - UC3666是一款双通道恒频电流模式PWM降压转换器,适用于低电压、锂离子电池供电的应用,这些应用需要高效率和小尺寸。输出电压可以通过外部电阻分压器从0.6V调整到5.5V。集成了一个主开关和一个同步整流器以提供高效率,从而节省了外部肖特基二极管。该设备可以实现100%占空比。

6. 应用信息: - 通常用于数字相机、便携式仪器、薄型DVD、微处理器和DSP核心供电、无线和DSL卡、PDA、智能手机、移动电话等。

7. 封装信息: - 封装类型:SON-10。 - 包装:胶带卷装。
UC3666 价格&库存

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