UC4601

UC4601

  • 厂商:

    UTC(友顺)

  • 封装:

  • 描述:

    UC4601 - PWM STEP-DOWN DC-DC CONTROLLER - Unisonic Technologies

  • 详情介绍
  • 数据手册
  • 价格&库存
UC4601 数据手册
UNISONIC TECHNOLOGIES CO., LTD UC4601 Preliminary CMOS IC PWM STEP-DOWN DC-DC CONTROLLER DESCRIPTION The UTC UC4601 is a PWM step-down DC/DC controller. It has a low supply current. The step-down DC/DC converter with low ripple, high efficiency performance is conveniently configured with additional external components, such as a power-transistor, an inductor, a diode and capacitors. The output voltage can be adjusted with external components. The UTC UC4601 contains a high precision band-gap voltage reference, a PWM control circuit, a soft-start circuit, a protection circuit, an oscillator, an error amplifier with built-in compensation network and input/output voltage detection circuits. The UTC UC4601 based DC/DC converter can performance well when maintaining stability, which is due to its built-in state-of-art control algorithm. Further, if the term of maximum duty cycle retains on a certain time, the embedded protection circuits restart the operation with soft-start and repeat until the maximum duty cycle condition is released. Finally, the internal UVLO function blocks potentially unstable output when the input voltage reaches the UVLO threshold or less. This is aiming at making this circuit standby for low power consumption. The UTC UC4601 can be applied in battery-powered equipment, hand-held communication equipment, cameras, video instruments such as VCRs, camcorders, household electrical appliances. FEATURES * 500kHZ oscillation frequency * Input voltage varies from 2.3V to 18V * Low temperature coefficient of output voltage: Typ. ±100ppm/°C * Internal soft-start and protection function * High efficiency up to 90% (TYP.) * High output voltage accuracy: ±2% * Standly current: 0.1μA (TYP.) * CMOS output capability ORDERING INFORMATION Ordering Number Lead Free Halogen Free UC4601L-AF5-R UC4601G-AF5-R UC4601L - AF5 - R (1) Packing Type (2) Package Type (3) Lead Free (1) R: Tape Reel (2) AF5: SOT-25 (3) G: Halogen Free, L: Lead Free Package SOT-25 Packing Tape Reel www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 4 QW-R502-494.b UC4601 MARKING 3 2 UJ46 4 5 1 G: Halogen Free L : Lead Free Preliminary CMOS IC PIN CONFIGURATION PIN DESCRIPTION PIN NO 1 2 3 4 5 PIN NAME CE GND VFB EXT VIN DESCRIPTION Chip Enable. Active with “H” Ground Feedback Voltage External Transistor Driver Pin (CMOS output) Power input voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R502-494.b UC4601 ABSOLUTE MAXIMUM RATING Preliminary CMOS IC PARAMETER SYMBOL RATINGS UNIT VIN Supply Voltage VIN 20 V Ext Pin Output Voltage VEXT -0.3 ~ VIN+0.3 V CE Pin Input Voltage VCE -0.3 ~ VIN+0.3 V VOUT/VFB Pin Input Voltage VOUT/VFB -0.3 ~ 6 V Ext Pin Output Current IEXT ±50 mA Power Dissipation PD +250 mW Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -55 ~ +125 °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. OPERATING RANGE PARAMETER VIN Supply Voltage Ext Pin Output Voltage CE Pin Input Voltage VOUT/VFB Pin Input Voltage Ext Pin Output Current SYMBOL VIN VEXT VCE VOUT/VFB IEXT RATINGS 2.5 ~ 18 -0.3 ~ VIN+0.3 -0.3 ~ VIN+0.3 -0.3 ~ 5.5 ±50 UNIT V V V V mA ELECTRICAL CHARACTERISTICS (TOPR=25°C, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS Adjustable Output Voltage Type Operating Voltage VIN Feedback Voltage VFB VIN=VCE=8V, ILOAD =350mA Feedback Voltage Temperature ΔVFB/ΔT -40°C
UC4601
1. 物料型号: - 订购型号包括UC4601L-AF5-R(无铅)和UC4601G-AF5-R(无卤素,无铅),封装类型为SOT-25。

2. 器件简介: - UTC UC4601是一款PWM步降DC/DC控制器,具有低供电电流。通过额外的外部组件如功率晶体管、电感、二极管和电容器,可以方便地配置具有低纹波、高效率性能的步降DC/DC转换器。输出电压可以通过外部组件调整。

3. 引脚分配: - CE(1):芯片使能,高电平有效。 - GND(2):地。 - VFB(3):反馈电压。 - EXT(4):外部晶体管驱动引脚(CMOS输出)。 - VIN(5):电源输入电压。

4. 参数特性: - 振荡频率:500kHz。 - 输入电压范围:2.3V至18V。 - 输出电压温度系数:典型值±100ppm/°C。 - 内部软启动和保护功能。 - 高效率:典型值高达90%。 - 高输出电压精度:±2%。 - 待机电流:0.1μA(典型值)。 - CMOS输出能力。

5. 功能详解: - 包含高精度带隙电压参考、PWM控制电路、软启动电路、保护电路、振荡器、内置补偿网络的错误放大器和输入/输出电压检测电路。 - 基于UTC UC4601的DC/DC转换器在保持稳定性方面表现良好,这归功于其内置的先进控制算法。 - 内部UVLO功能在输入电压达到UVLO阈值或更低时阻断潜在的不稳定输出,旨在使电路待机时功耗低。

6. 应用信息: - 可应用于电池供电设备、手持通信设备、摄像机、录像机、家用电器等。

7. 封装信息: - 封装类型为SOT-25,提供有铅(AF5)和无铅(G)以及无卤素无铅(L)版本。
UC4601 价格&库存

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