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参数资料
| 型号： | TPS62063DSGT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 3400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 2 X 2 MM, 0.75 MM HEIGHT, GREEN, PLASTIC, WSON-8 |
| 文件页数： | 7/26页 |
| 文件大小： | 1109K |
| 代理商： | TPS62063DSGT |
TPS62060
V
= 1.8 V
up to 1.6 A
OUT
R
360 k
1
R
180 k
2
V
= 2.7 V to 6 V
IN
C
10
OUT
F
C
10
IN
F
PVIN
AVIN
EN
MODE
AGND
PGND
SW
FB
C
22 pF
ff
L
1.0 H
V
OUT + VREF
1 )
R
1
R
2
f
p
z
1
ff
1
=
= 25 kHz
2
R
C
p
ff
1
C
=
2
R
25 kHz
c
1
=
= 50kHz
2
(1 H
10 F)
f
p
DIL + Vout
1 *
Vout
Vin
L
SLVSA95A
– MARCH 2010 – REVISED JANUARY 2011
APPLICATION INFORMATION
Figure 23. TPS62060 1.8V Adjustable Output Voltage Configuration
OUTPUT VOLTAGE SETTING
The output voltage can be calculated to:
with an internal reference voltage VREF typically 0.6V.
To minimize the current through the feedback divider network, R2 should be within the range of 120 k to 360
k
. The sum of R1 and R2 should not exceed ~1M, to keep the network robust against noise. An external
feed-forward capacitor Cff is required for optimum regulation performance. Lower resistor values can be used.
R1 and Cff places a zero in the loop. The right value for Cff can be calculated as:
Therefore, the feed forward capacitor can be calculated to:
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
The internal compensation network of TPS62060 is optimized for a LC output filter with a corner frequency
of:
The part operates with nominal inductors of 1.0
H to 1.2 H and with 10F to 22F small X5R and X7R ceramic
capacitors. Please refer to the lists of inductors and capacitors. The part is optimized for a 1.0
H inductor and
10
F output capacitor.
Inductor Selection
The inductor value has a direct effect on the ripple current. The selected inductor has to be rated for its dc
resistance and saturation current. The inductor ripple current (
ΔIL) decreases with higher inductance and
increases with higher VI or VO.
Equation 1 calculates the maximum inductor current in PWM mode under static load conditions. The saturation
current of the inductor should be rated higher than the maximum inductor current as calculated with Equation 2.
This is recommended because during heavy load transient the inductor current rises above the calculated value.
(1)
2010–2011, Texas Instruments Incorporated
15
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| TPS62065DSGR | 功能描述:直流/直流开关转换器 3MHz 2A Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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