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參數(shù)資料
| 型號： | TPS726126 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | "Single Output LDO |
| 中文描述： | 單輸出 LDO、1.0A、固定電壓 (1.26V)、任意電容、低輸入電壓、集成 SVS |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 445K |
| 代理商： | TPS726126 |
www.ti.com
DDPAK Power Dissipation
P
Dmax +
(5 * 2.5) V x 1 A + 2.5 W
(5)
RθJAmax + (125 * 55)°C 2.5 W + 28°C W
(6)
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
TPS726126
TPS72615, TPS72616
TPS72618, TPS72625
SLVS403F – MAY 2002 – REVISED MAY 2005
THERMAL INFORMATION (continued)
The DDPAK package provides an effective means of managing power dissipation in surface mount applications.
The DDPAK 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 DDPAK package enhances the thermal performance of the
package.
To illustrate, the TPS72625 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 4 gives Equation 6:
From Figure 20, 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 20
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 21 shows the side view of the operating environment used in the computer model.
Figure 20. DDPAK Thermal Resistance vs Copper Heatsink Area
9
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| 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 |
| TPS72616DCQR | 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 |
|---|---|
| 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 |
| TPS726126DCQG4 | 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 |
| TPS726126DCQR | 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 |
| TPS726126DCQRG4 | 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 |
| TPS72615DCQ | 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 |
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