MC34063

MC34063 产品规格手册 MC34063 MC34063 为 一 单 片 DC-DC 变换集 成电路， 内含温度补偿 的 参 考 电 压 源 ( 1.25V)、比较器、 能有效限制电流及控 制工作周 期的振  工作电压范围宽 3.0V~40V  静态电流小  管脚排列图  具有输出电流限制功能,输出电流保护 荡器， 驱动器及大电流输 出开关管等, 功能 外配少量元件，就能 组成升压 、降压  及电压 反转型 DC-DC 变换器 。 该  电路采用 DIP8 和 SOP8 封装形式 输出开关极限电流达 1.3A 输出电压可调  工作频率可达 100kHz  内部基准参考电压精度 2% 参考信息 封装图 引脚排列 功能框架 SOP-8 Copyright© Msksemi Incorporated www.msksemi.com MC34063 引出端序号 功 能 符号 引出端序号 功 能 符号 1 开关管集电极 SC 5 比较器反向端输入 FB 2 开关管发射极 SE 6 输入电压 VCC 3 定 时 电 容 CT 7 检 GND 8 4 地 Ipk 测 DC 驱动管集电极 参数名称 符号 电源电压 Vcc 比较器输入电压范围 VIR 数 值 最小 -0.3 最大 单位 40 V 40 V 输出管集电极电压 Vc(switch) 40 V 输出管发射极电压(VPIN1=32V) VE(switch) 40 V 输出管集电极与发射极间的电压 VCE(switch) 40 V 驱动管集电极电压 Vc(driver) 40 V 驱动管集电极电流 Ic(driver) 100 mA 输出电流 ISW 1.3 A 功耗 PD 1.25 W 工作环境温度 TA 0 +70 ℃ 贮存温度 Tstg -65 +150 ℃ (Vcc=5.0V;TA=0℃~70℃,除非另外规定) Copyright© Msksemi Incorporated www.msksemi.com MC34063 特性条件 规范值 符号 最小 典型 最大 单 位 振荡器部分 振荡频率(VPIN5=0V,CT=1.0F,TA=25℃) fosc 24 33 42 KHz 充电电流(VCC=5.0V~32V,TA=25℃) Ichg 24 33 42 uA 放电电流(VCC=5.0V~32V,TA=25℃) Idischg 140 200 260 uA 放电与充电电流之比(VPIN7=VCC,TA=25℃) Idischg/Ichg 5.2 6.2 7.5 -- VIPK 250 300 350 mV VCE(sat) -- 1.0 1.3 V VCE(sat) -- 0.45 0.7 V hfe 50 120 -- -- -- 0.01 100 1.25 1.27 电流限制器电压灵敏度(Ichg=Idischg,TA=25℃) 输出部分: 饱和压降(ISW=1.0A,PIN1,8 连接) 饱和压降(ISW=1.0A,RPIN8=82 到 VCC) 直流放大倍数(ISW=1A,VCE=5V,TA=25℃) 集电极漏电流(VCE=30V) IC(off) uA 比较器部分: 阈值电压(TA=25℃) (TA=0~70℃) 输入偏置电流(VIN=0V) 阈值电压线性调整率(VCC=3.0~30V) 1.23 Vth 1.21 IIB Regline - - 1.29 V - - -40 -400 nA - - 1.4 5.0 mV - - 2.5 4.0 mA 整体部分: 电 源 电 流 (VCC=5.0V~30V,CT=1.0nF, VPIN7=Vcc,VPIN5>Vth ,VPIN2=GND,其余悬 空) Copyright© Msksemi Incorporated ICC - - www.msksemi.com MC34063 MC34063 作 反转 式 DC-DC 变 换器 如图所示, 当加接 LC 滤波器后,能进一步减小电压纹波及噪声,特性见下表 线性调整率 VIN=4.5~6.0V,Io=100mA 3.0mV=0.012% 负载调整率 VIN=5.0V,Io=10~100mA 0.022V=+0.09% 输出纹波 VIN=5.0V,Io=100mA 50 0 mVpp VIN=5.0V,RL=0.1 9 1 0 mA 效率 VIN=5.0V,Io=100mA 64.5% 输出纹波 VIN=5.0V,Io=100mA 7 0 mVpp 电路限制电流 Copyright© Msksemi Incorporated www.msksemi.com MC34063 Copyright© Msksemi Incorporated www.msksemi.com MC34063 包装数据 Symbol Dimensions In Millimeters Min Max Dimensions In Inches Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 0.330 0.510 0.013 0.020 0.170 0.250 0.007 0.010 4.800 5.000 0.189 0.197 b c D e 1 . 2 7 0 ( BSC) 0 . 0 5 0 ( BSC) E 5.800 6.200 0.228 0.244 E1 3.800 4.000 0.150 0.157 L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° 参考焊盘布局 卷轴规格 P/N MC34063 Copyright© Msksemi Incorporated PKG QTY SOP-8 2500 www.msksemi.com MC34063 Attention ■ Any and all MSKSEMI Semiconductor products described or contained herein do not handle applications that require extremely high levels of reliability, such as life-support have specifications that can systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. 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