參數(shù)資料
型號(hào)： TPS75101QPWPREP
廠商： Texas Instruments, Inc.
元件分類(lèi)： 基準(zhǔn)電壓源/電流源
英文描述： FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
中文描述： 快速瞬態(tài)響應(yīng)1.5低壓差電壓調(diào)節(jié)器
文件頁(yè)數(shù)： 24/27頁(yè)
文件大?。?/td> 398K
代理商： TPS75101QPWPREP
TPS75101-Q1,
’
75115-Q1,
’
75118-Q1,
’
75125-Q1,
’
75133-Q1 WITH POWER GOOD
TPS75301-Q1, TPS75315-Q1, TPS75318-Q1, TPS75325-Q1, TPS75333-Q1 WITH RESET
FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
SGLS159
–
APRIL 2003
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
THERMAL INFORMATION
thermally enhanced TSSOP-20 (PWP
–
PowerPad
) (continued)
Figure 28 is an example of a thermally enhanced PWB layout for use with the new PWP package. This board
configuration was used in the thermal experiments that generated the power ratings shown in Figure 26 and Figure
27. As discussed earlier, copper has been added on the PWB to conduct heat away from the device. R
θ
JA
for this
assembly is illustrated in Figure 26 as a function of heat-sink area. A family of curves is included to illustrate the effect
of airflow introduced into the system.
Board thickness
Board size
Board material
Copper trace/heat sink
Exposed pad mounting
62 mils
3.2 in.
×
3.2 in.
FR4
1 oz
63/67 tin/lead solder
Heat-Sink Area
1 oz Copper
Figure 28. PWB Layout (Including Copper Heatsink Area) for Thermally Enhanced PWP Package
From Figure 26, R
θ
JA
for a PWB assembly can be determined and used to calculate the maximum power-dissipation
limit for the component/PWB assembly, with the equation:
PD(max)
TJmax
RJA(system)
TA
Where:
(5)
T
J
max is the maximum specified junction temperature (150
°
C absolute maximum limit, 125
°
C recommended
operating limit) and T
A
is the ambient temperature.
P
D(max)
should then be applied to the internal power dissipated by the TPS75133QPWP regulator. The equation
for calculating total internal power dissipation of the TPS75133QPWP is:
PD(total)
VI
VO
IO
VI
IQ
(6)
Since the quiescent current of the TPS75133QPWP is very low, the second term is negligible, further simplifying
the equation to:
PD(total)
VI
VO
IO
(7)
For the case where T
A
= 55
°
C, airflow = 200 ft/min, copper heat-sink area = 4 cm
2
, the maximum power-dissipation
limit can be calculated. First, from Figure 26, we find the system R
θ
JA
is 50
°
C/W; therefore, the maximum
power-dissipation limit is:
PD(max)
TJmax
RJA(system)
TA
125 C
50 C W
55 C
1.4 W
(8)
相關(guān)PDF資料
PDF描述
TPS75118QPWPREP FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
TPS75133QPWPREP FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
TPS75125QPWPRQ1R FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
TPS75118QPWPRQ1R FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
TPS75115QPWPRQ1R FAST-TRANSIENT-RESPONSE 1.5-A LOW-DROPOUT VOLTAGE REGULATORS
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TPS75103YFFR 功能描述:LED照明驅(qū)動(dòng)器 Low Dropout Two- Bank LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
TPS75103YFFT 功能描述:LED照明驅(qū)動(dòng)器 Low Dropout 2 Bank LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
TPS75105DSKEVM-529 功能描述:電源管理IC開(kāi)發(fā)工具 TPS75105DSKEVM-529 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS75105DSKR 功能描述:LED照明驅(qū)動(dòng)器 LDO,Two-Bank LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
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