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參數(shù)資料
| 型號： | TPS72525DCQ |
| 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 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大小： | 535K |
| 代理商： | TPS72525DCQ |
www.ti.com
P
Dmax +
(5 * 2.5) V x 1 A + 2.5 W
(7)
RθJAmax + (125 * 55)°C 2.5 W + 28°C W
(8)
15
20
25
30
35
40
0.1
1
10
100
Copper Heatsink Area cm2
Thermal
Resistance
θ
JA
R
C/W°
No Air Flow
150 LFM
250 LFM
1 oz. Copper
Power Plane
1 oz. Copper
Ground Plane
2 oz. Copper Solder Pad
with 25 Thermal Vias
Thermal Vias, 0.3 mm
Diameter, 1,5 mm Pitch
TPS72501
TPS72515, TPS72516
TPS72518, TPS72525
SLVS341D – MAY 2002 – REVISED MARCH 2004
THERMAL INFORMATION (continued)
To illustrate, the TPS72525 in a DDPAK package was chosen. For this example, the average input voltage is 5
V, the output voltage is 2.5 V, the average output current is 1 A, the ambient temperature 55
°C, the air flow is
150 LFM, 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 8:
From Figure 21, DDPAK Thermal Resistance vs Copper Heatsink Area, the ground plane needs to be 1 cm2 for
the part to dissipate 2.5 W. The operating environment used in the computer model to construct Figure 21
consisted of a standard JEDEC High-K board (2S2P) with a 1 oz. internal copper plane and ground plane. The
package is soldered to a 2 oz. copper pad. The pad is tied through thermal vias to the 1 oz. ground plane.
Figure 22 shows the side view of the operating environment used in the computer model.
Figure 21. DDPAK Thermal Resistance vs Copper Heatsink Area
Figure 22. DDPAK Thermal Resistance
12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS72525DCQ | 制造商:Texas Instruments 功能描述:V REG LDO SMD 72525 SOT-223-6 |
| TPS72525DCQG4 | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(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 |
| TPS72525DCQR | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(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 |
| TPS72525DCQRG4 | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(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 |
| TPS72525KTT | 制造商:Rochester Electronics LLC 功能描述:LOW DROP-OUT REGULATOR - Tape and Reel 制造商:Texas Instruments 功能描述: |
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