參數(shù)資料
型號: TPS40211QDGQRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10
封裝: GREEN, PLATSIC, MSOP-10
文件頁數(shù): 9/41頁
文件大小: 999K
代理商: TPS40211QDGQRQ1
V
SSE(1)
V
SS
V
OUT
V
SSE
V
SS(ofst)
t
0
t
1
V
SS(ofst)+700 mV
V
IN - VD
t
2
t
3
2
5
4
SS
COMP
FB
TPS40210/11
R
SS(chg)
UDG-07121
+
R
SS(dchg)
700 mV REF
OC Fault
UVLO
DIS
Error Amplifier
www.ti.com
SLVS861D – AUGUST 2008 – REVISED APRIL 2010
point of zero volts. It cannot do this, due to the converter architecture. The output voltage starts from the input
voltage less the drop across the diode (VIN – VD) and rises from there. The point at which the output voltage
starts to rise (t2) is when the VSSE ramp passes the point where it is commanding more output voltage than (VIN
VD). This voltage level is labeled VSSE(1). The time required for the output voltage to ramp from a theoretical zero
to the final regulated value (from t1 to t3) is determined by the time it takes for the capacitor connected to the SS
pin (CSS) to rise through a 700-mV range, beginning at VSS(ofst) above GND.
Figure 24. SS Pin Voltage and Output Voltage
Figure 25. SS Pin Functional Circuit
Copyright 2008–2010, Texas Instruments Incorporated
17
Product Folder Link(s): TPS40210-Q1 TPS40211-Q1
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