參數(shù)資料
型號: TPS62421DRC
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 1.61 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝: 3 X 3 MM, PLASTIC, SON-10
文件頁數(shù): 21/37頁
文件大?。?/td> 1020K
代理商: TPS62421DRC
SW1
FB1
DEF_1
VIN2.5V – 6V
VIN
EN_1
EN_2
MODE/
DATA
TPS62420
GND
R11
R12
PowerPAD
R21
R22
SW2
ADJ2
C
10 F
IN
m
COUT2
C
33pF
ff2
L1
3.3 H
m
3.3 H
m
COUT2
L2
SLVS676C – JUNE 2006 – REVISED JUNE 2010
www.ti.com
Connect the GND Pin of the device to the PowerPAD of the PCB and use this Pad as a star point. For each
converter use a common Power GND node and a different node for the Signal GND to minimize the effects of
ground noise. Connect these ground nodes together to the PowerPAD (star point) underneath the IC. Keep the
common path to the GND PIN, which returns the small signal components and the high current of the output
capacitors as short as possible to avoid ground noise. The output voltage sense lines (FB 1, ADJ2, DEF_1)
should be connected right to the output capacitor and routed away from noisy components and traces (e.g., SW
line). If the EasyScale interface is operated with high transmission rates, the MODE/DATA trace must be routed
away from the ADJ2 line to avoid capacitive coupling into the ADJ2 pin. A GND guard ring between the
MODE/DATA pin and ADJ2 pin avoids potential noise coupling.
Figure 36. Layout Diagram
28
Copyright 2006–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS62420 TPS62421
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