參數(shù)資料
型號(hào): PTH08080WAST
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 2.25 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDMA5
封裝: ROHS COMPLIANT PACKAGE-5
文件頁數(shù): 4/17頁
文件大小: 520K
代理商: PTH08080WAST
www.ti.com
V =12V
I
V =1.8V
O
Inhibit
GND
RSET
8.06kW
0.05W
1%
PTH08080W
2
4
3
1
5
V Adj
O
GND
Inhibit
VI
VO
Q1
BSS138
L
O
A
D
CI
CO
t-Time=5ms/div
Q1V
(5V/div)
DS
I (0.5 A/div)
I
V (1V/div)
O
SLTS235C – FEBRUARY 2005 – REVISED FEBRUARY 2008
Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then
turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within
20 ms. Figure 13 shows the typical rise in the output voltage, following the turn off of Q1. The turn off of Q1
corresponds to the rise in the waveform, Q1 VDS. The waveforms were measured with a 2-A resistive load.
Figure 12. On/Off Inhibit Control Circuit
Figure 13. Power-Up Response From Inhibit Control
12
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s) :PTH08080W
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