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参数资料
| 型号： | TS3406CX5RF |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | ROHS COMPLIANT, SOT-25, 5 PIN |
| 文件页数： | 4/7页 |
| 文件大小： | 279K |
| 代理商： | TS3406CX5RF |
TS3406
600mA / 1.5MHz Synchronous Buck Converter
4/7
Version: B07
Function Description (Continue)
Maximum Load Current
The TS3406 will operate with input supply voltage as low as 2.5V, however, the maximum load current decreases at
lower input due to large IR drop on the main switch and synchronous rectifier. The slope compensation signal reduces
the peak inductor current as a function of the duty cycle to prevent sub-harmonic oscillations at duty cycles greater than
50%. Conversely the current limit increases as the duty cycle decreases.
Application Information
Setting the Output Voltage
Application circuit item shows the basic application circuit with TS3406 adjustable output version. The external resistor
sets the output voltage according to the following equation:
Inductor Selection
For most designs, the TS3406 operates with inductors of 1H to 4.7H. Low inductance values are physically smaller
but require faster switching, which results in some efficiency loss. The inductor value can be derived from the following
equation:
Where is inductor Ripple Current. Large value inductors lower ripple current and small value inductors result in high
ripple currents. Choose inductor ripple current approximately 35% of the maximum load current 600mA, IL=210mA.
For output voltages above 2.0V, when light-load efficiency is important, the minimum recommended inductor is 2.2H.
For optimum voltage-positioning load transients, choose an inductor with DC series resistance in the 50m to 150m
range. For higher efficiency at heavy loads (above 200mA), or minimal load regulation (but some transient overshoot),
the resistance should be kept below 100m. The DC current rating of the inductor should be at least equal to the
maximum load current plus half the ripple current to prevent core saturation (600mA+105mA).
Input Capacitor Selection
The input capacitor reduces the surge current drawn from the input and switching noise from the device. The input
capacitor impedance at the switching frequency shall be less than input source impedance to prevent high frequency
switching current passing to the input. A low ESR input capacitor sized for maximum RMS current must be used.
Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR and small
temperature coefficients. A 4.7F ceramic capacitor for most applications is sufficient.
Table 1: Resistor Select for Output Voltage Setting
VOUT
R2
R1
1.2V
300K
1.5V
300K
450K
1.8V
300K
600K
2.5V
300K
950K
Table 2: Inductor Select for Output Voltage Setting (Vcc-3.6V)
VOUT
1.2V
1.5V
1.8V
2.5V
Inductor
2.2uH
Part Number
WE-TPC
7440430027
7440430022
Note: Part Type MH or M (www.we-online.com)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TS3406CXRF | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:600mA / 1.5MHz Synchronous Buck Converter |
| TS3407IPT | 制造商:ST 功能描述:Micropower quad CMOS voltage comparator |
| TS3408 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| TS3410 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:1A / 1.5MHz Synchronous Buck Converter |
| TS3410_10 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:1A / 1.4MHz Synchronous Buck Converter |
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