參數(shù)資料
型號(hào)： TPS72525KTT
廠商： Texas Instruments, Inc.
英文描述： LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
中文描述： 低輸入電壓，1低壓差線性穩(wěn)壓器與督導(dǎo)員
文件頁(yè)數(shù)： 5/18頁(yè)
文件大?。?/td> 535K
代理商： TPS72525KTT
www.ti.com
Maximum
Junction
T
emperature
125
T JM
C
°
1
2
3
4
5
0.1
1
10
100
Maximum
Power
Dissipation
W
P
D
Copper Heatsink Area cm2
TA = 55°C
No Air Flow
150 LFM
250 LFM
SOT223 Power Dissipation
P
Dmax +
(3.3 * 2.5) V x 1 A + 800 mW
(9)
RθJAmax + (125 * 55)°C 800 mW + 87.5°C W
(10)
TPS72501
TPS72515, TPS72516
TPS72518, TPS72525
SLVS341D – MAY 2002 – REVISED MARCH 2004
THERMAL INFORMATION (continued)
From the data in Figure 23 and rearranging Equation 6, the maximum power dissipation for a different ground
plane area and a specific ambient temperature can be computed.
Figure 23. Maximum Power Dissipation vs Copper Heatsink Area
The SOT223 package provides an effective means of managing power dissipation in surface mount applications.
The SOT223 package dimensions are provided in the Mechanical Data section at the end of the data sheet. The
addition of a copper plane directly underneath the SOT223 package enhances the thermal performance of the
package.
To illustrate, the TPS72525 in a SOT223 package was chosen. For this example, the average input voltage is
3.3 V, the output voltage is 2.5 V, the average output current is 1 A, the ambient temperature 55
°C, no air flow is
present, and the operating environment is the same as documented below. Neglecting the quiescent current, the
maximum average power is:
Substituting TJmax for TJ into Equation 6 gives Equation 10:
From Figure 24, RΘJA vs PCB Copper Area, the ground plane needs to be 0.55 in
2 for the part to dissipate 800
mW. The operating environment used to construct Figure 24 consisted of a board with 1 oz. copper planes. The
package is soldered to a 1 oz. copper pad on the top of the board. The pad is tied through thermal vias to the 1
oz. ground plane.
13
相關(guān)PDF資料
PDF描述
TPS726126 "Single Output LDO
TPS726126DCQ LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS726126DCQR LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72615KTTR LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
TPS72615KTTT LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS72525KTTR 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS72525KTTRG3 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS72525KTTT 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS72525KTTTG3 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
TPS726126DCQ 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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