參數(shù)資料
型號(hào)： PTV08T250WAD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
文件頁(yè)數(shù)： 25/30頁(yè)
文件大?。?/td> 795K
代理商： PTV08T250WAD
SLTS260E – OCTOBER 2005 – REVISED NOVEMBER 2008 .......................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 560 F, CO = 660 F, and IO = IOmax (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Capacitance Value
Nonceramic
660(7)
14,000(8)
F
w/out TurboTrans
Ceramic
3000
Equivalent series resistance (non-ceramic)
3(9)
m
CO
External output capacitance
see TT
14,000(11)
F
Capacitance Value
chart(10)
w/ TurboTrans
Capacitance X ESR product (CO*ESR)
10,000(12)
m
*
F
2.7
MTBF
Reliability
Per Bellcore TR-332 50% stress, TA = 40°C, ground benigh
106 Hrs
(7)
A minimum value of output capacitance is required for proper operation. Adding additional capacitance at the load further improves
transient response. See the Capacitor Application Information section for further guidance.
(8)
This is the calculated maximum. This value includes both ceramic and non-ceramic capacitors. The minimum ESR requirement often
results in a lower value. For further information, see the related application section.
(9)
This is the typical ESR for all the electrolytic (nonceramic) output capacitance. Use 5 m
as the minimum when using manufacturer's
max-ESR values to calculate.
(10) Minimum capacitance is determined by the transient deviation requirement. A corresponding resistor, RTT is required for proper
operation. See the TurboTrans Selection section for guidance in selecting the capacitance and RTT value
(11) This is the calculated maximum output capacitance. This value includes both ceramic and non-ceramic capacitors.
(12) When calculating the Capacitance X ESR product use the capacitance and ESR values of a single capacitor. For an output capacitor
bank of several capacitor types and values, calculate the C*ESR product using the values of the capacitor that makes up the majority of
the capacitance.
4
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): PTV08T250W
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