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参数资料
| 型号： | TPS53126PW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.17 A DUAL SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封装： | PLASTIC, TSSOP-24 |
| 文件页数： | 14/30页 |
| 文件大小： | 899K |
| 代理商： | TPS53126PW |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
2
Iload
L1
C1 =
2
Vo1
Vos
D
D
(7)
2
Iload
L1
C1 =
2
K
Vus
D
(8)
IN
Tmin(off)
Ton1
K = (V
Vo1)
Vo1
Ton1
Ton1 + Tmin(off)
-
÷
è
(9)
L1(ripple)
I
1
C1 =
8 Vo1(ripple)
sw
(10)
(ripple)
Vo1
R1 =
1
R2
(TEST2=GND)
VFB1
0.765 +
2
÷
÷
-
÷
÷
è
(11)
(ripple)
Vo1
R1 =
1
R2
(TEST2
V5FILT)
VFB1
0.758 +
2
÷
÷
-
=
÷
÷
è
(12)
www.ti.com........................................................................................................................................................................................................ SLUS909 – MAY 2009
The capacitor value and ESR determines the amount of output voltage ripple and load transient response.
Recommend to use ceramic output capacitor.
Where:
Select the capacitance value greater than the largest value calculated from Equation 7, Equation 8 and
Equation 10. The capacitance for C1 should be greater than 66
F.
Where:
ΔVos = the allowable amount of overshoot voltage in load transition
ΔVus = the allowable amount of undershoot voltage in load transition
Tmin(off) = Min-off time
3. Choose input capacitor.
The TPS53126 requires an input decoupling capacitor and a bulk capacitor is needed depending on the
application. A minimum 10-
F high-quality ceramic capacitor is recommended for the input capacitor. The
capacitor voltage rating needs to be greater than the maximum input voltage.
4. Choose bootstrap capacitor.
The TPS53126 requires a bootstrap capacitor from SWx to VBSTx to provide the floating supply for the
high-side drivers. A minimum 0.1-
F high-quality ceramic capacitor is recommended. The voltage rating
should be greater than 6 V.
5. Choose VREG5 and V5FILT capacitors.
The TPS53126 requires both the VREG5 regulator and V5FILT input are bypassed. A minimum 4.7-
F
high-quality ceramic capacitor must be connected between the VREG5 and GND for proper operation. A
minimum 1.0-
F high-quality ceramic capacitor must be connected between the V5FILT and GND for proper
operation. Both of these capacitors’ voltage ratings should be greater than 6 V.
6. Choose output voltage divide resistors.
The output voltage is set with a resistor divider from output voltage node to the VFBx pin. It is recommended
to use 1% tolerance or better resisters. Select R2 between 10 k
and 100 k and use Equation 11 and
Equation 12 to calculate R1.
Where:
VFB1(ripple) = Ripple Voltage at VFB1
7. Choose resister setting for over current limit.
Copyright 2009, Texas Instruments Incorporated
21
Product Folder Link(s): TPS53126
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相关代理商/技术参数 |
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|---|---|
| TPS53126PWR | 功能描述:DC/DC 开关控制器 Dual Sync. Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS53126RGER | 功能描述:DC/DC 开关控制器 Dual Sync. Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS53126RGET | 功能描述:DC/DC 开关控制器 Dual Sync. Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS53127 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL SYNCHRONOUS STEP-DOWN CONTROLLER FOR LOW VOLTAGE POWER RAILS |
| TPS53127_1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL SYNCHRONOUS STEP-DOWN CONTROLLER FOR LOW VOLTAGE POWER RAILS |
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