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TPS62201

更新时间： 2024-02-23 01:24:42
品牌 Logo 应用领域
德州仪器 - TI 转换器功效DC-DC转换器
页数 文件大小 规格书
19页 257K
描述
HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER

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TPS62201 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOT-23
包装说明：LSSOP,针数：5
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：0.8其他特性：PFM MODE ALSO AVAILABLE
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：6 V
最小输入电压：2.5 V标称输入电压：3.6 V
JESD-30 代码：R-PDSO-G5JESD-609代码：e4
长度：2.9 mm湿度敏感等级：1
功能数量：1端子数量：5
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：0.67 A最大输出电压：1.5 V
最小输出电压：1.5 V封装主体材料：PLASTIC/EPOXY
封装代码：LSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.45 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：1500 kHz温度等级：INDUSTRIAL
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.6 mm
Base Number Matches：1

TPS62201 数据手册

 浏览型号TPS62201的Datasheet PDF文件第2页浏览型号TPS62201的Datasheet PDF文件第3页浏览型号TPS62201的Datasheet PDF文件第4页浏览型号TPS62201的Datasheet PDF文件第6页浏览型号TPS62201的Datasheet PDF文件第7页浏览型号TPS62201的Datasheet PDF文件第8页 
TPS62200, TPS62201  
TPS62202, TPS62203  
TPS62204, TPS62205  
SLVS417B – MARCH 2002 – REVISED OCTOBER 2002  
power save mode operation (continued)  
PFM Mode at Light Load  
Comparator High  
1.6%  
0.8%  
Comparator Low  
Comparator Low 2  
V
O
PWM Mode at Medium to Full Load  
Figure 2. Power Save Mode Thresholds and Dynamic Voltage Positioning  
The converter enters the fixed frequency PWM mode again as soon as the output voltage falls below the comp  
low 2 threshold.  
dynamic voltage positioning  
As described in the power save mode operation sections and as detailed in Figure 2, the output voltage is  
typically 0.8% above the nominal output voltage at light load currents, as the device is in power save mode. This  
gives additional headroom for the voltage drop during a load transient from light load to full load. During a load  
transient from full load to light load, the voltage overshoot is also minimized due to active regulation turning on  
the N-channel rectifier switch.  
soft start  
The TPS6220x has an internal soft start circuit that limits the inrush current during start-up. This prevents  
possible voltage drops of the input voltage in case a battery or a high impedance power source is connected  
to the input of the TPS6220x.  
The soft start is implemented as a digital circuit increasing the switch current in steps of typically 60 mA,  
120 mA, 240 mA and then the typical switch current limit of 480 mA. Therefore the start-up time mainly depends  
on the output capacitor and load current. Typical start-up time with 10 µF output capacitor and 200 mA load  
current is 800 µs.  
low dropout operation 100% duty cycle  
The TPS6220x offers a low input to output voltage difference, while still maintaining operation with the 100%  
duty cycle mode. In this mode, the P-channel switch is constantly turned on. This is particularly useful in battery  
powered applications to achieve longest operation time by taking full advantage of the whole battery voltage  
range. The minimum input voltage to maintain regulation, depending on the load current and output voltage,  
can be calculated as  
ǒ
Ǔ
) R  
max  
L
Vin  
+ Vout  
) Iout  
  r (ON)  
max  
max  
min  
ds  
= maximum output current plus inductor ripple current  
Iout  
max  
r (ON)  
= maximum P-channel switch r (ON)  
ds  
max  
ds  
R = DC resistance of the inductor  
L
Vout  
= nominal output voltage plus maximum output voltage tolerance  
max  
5
www.ti.com  
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