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参数资料
| 型号： | TPS62005DGSRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 5/26页 |
| 文件大小： | 869K |
| 代理商： | TPS62005DGSRG4 |
APPLICATION INFORMATION
ADJUSTABLE OUTPUT VOLTAGE VERSION
O
R1
V
= 0.45 V
1 +
R2
÷
è
(1)
47
2
(ff)
o
1
C
=
for C
F
30000 R1
m
p
<
(2)
47
2
5
(ff)
o
1
C
=
for C
F
000 R1
m
p
(3)
VIN
1
8
6
7
3
2
9
5
10
4
L1 =10 mH
EN
ILIM
SYNC
GND
FC
PG
PGND
FB
L
TPS62000
+
Co =10 mF
VO =2.5V/600mA
C3=0.1 mF
Ci =10 mF
VI =2.7Vto5.5V
R3=320k
R1=820k
C(ff) =
6.8pF
R2=180k
+
PG
INDUCTOR SELECTION
www.ti.com ........................................................................................................................................... SLVS294E – SEPTEMBER 2000 – REVISED AUGUST 2008
When the adjustable output voltage version (TPS62000DGS) is used, the output voltage is set by the external
resistor divider (see Figure 15).
The output voltage is calculated as:
With R1 + R2
≤ 1 M
R1 + R2 should not be greater than 1 MW because of stability reasons.
For stability reasons, a small bypass capacitor (Cff) is required in parallel to the upper feedback resistor, refer to
Figure 15. The bypass capacitor value can be calculated as:
R1 is the upper resistor of the voltage divider. For C(ff), choose a value which comes closest to the computed
result.
Figure 15. Typical Application Circuit for Adjustable Output Voltage Option
A 10
H minimum output inductor is used with the TPS6200x. Values larger than 22 H or smaller than 10 H
may cause stability problems because of the internal compensation of the regulator.
For output voltages greater than 1.8 V, a 22
H inductance might be used in order to improve the efficiency of
the converter.
After choosing the inductor value of typically 10
H, two additional inductor parameters should be considered:
first the current rating of the inductor and second the dc resistance.
The dc resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor with
lowest dc resistance should be selected for highest efficiency.
In order to avoid saturation of the inductor, the inductor should be rated at least for the maximum output current
plus the inductor ripple current which is calculated as:
Copyright 2000–2008, Texas Instruments Incorporated
13
Product Folder Link(s): TPS62000, TPS62001, TPS62003 TPS62004, TPS62005, TPS62006 TPS62007, TPS62008
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相关代理商/技术参数 |
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|---|---|
| TPS62005QDGSRQ1 | 功能描述:直流/直流开关调节器 Auto Cat Hi-Eff Step Down Lo Pwr DC-DC RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62006DGS | 功能描述:直流/直流开关调节器 2.5V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62006DGSG4 | 功能描述:直流/直流开关调节器 2.5V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62006DGSR | 功能描述:直流/直流开关调节器 2.5V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62006DGSRG4 | 功能描述:直流/直流开关调节器 2.5V Out 600mA Step-Down Con RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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