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參數(shù)資料
| 型號： | TPS51206DSQT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO10 |
| 封裝： | 2 X 2 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大小： | 603K |
| 代理商： | TPS51206DSQT |
3
5
4
VTT
VTTSNS
PGND
TPS51206
C3
10 mF
VTT
UDG-11137
CC
RC
SLUSAH1
– MAY 2011
APPLICATION INFORMATION
VDD CAPACITOR
Add a ceramic capacitor, with a value 0.1
F (or greater) and X5R grade (or better), placed close to the VDD
terminal, to stabilize the bias supply voltage from any parasitic impedance from the power supply rail.
VLDOIN CAPACITOR
Depending on the trace impedance between the VLDOIN bulk power supply to the device, a transient increase of
source current is supplied mostly by the charge from the VLDOIN input capacitor. Use a 10-
F (or greater) and
X5R grade (or better) ceramic capacitor to supply this transient charge.
VTTREF CAPACITOR
Add a ceramic capacitor, with a value 0.22
F and X5R grade (or better), placed close to the VTTREF terminal
for stable operation.
VTT CAPACITOR
For stable operation, a 10-
F (or greater) and X5R (or better) grade ceramic capacitor(s) need to be attached
close to the VTT terminal. This capacitor is recommended to minimize any additional equivalent series resistance
(ESR) and/or equivalent series inductance (ESL) of ground trace between the PGND terminal and the VTT
capacitor(s).
VTTSNS CONNECTION
To achieve tight regulation with minimum effect of trace resistance, a remote sensing terminal, the VTTSNS pin
should be connected to the positive terminal of the VTT pin output capacitor(s) as a separate trace from the
high-current path from VTT. Consider adding a low-pass R-C filter at the VTTSNS pin in case the ESR of the
VTT output capacitor(s) is larger than 2 m
Ω. The R-C filter time constant should be approximately the same or
slightly lower than the time constant of the VTT output capacitance and ESR.
Figure 24. R-C Filter for VTTSNS
VDDQSNS CONNECTION
VDDQSNS is a reference input of the VTTREF and VTT. Trace should be routed away from noise-generating
lines.
12
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS51206
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