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参数资料
| 型号： | TPS726126DCQ |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR |
| 中文描述： | 低输入电压，1低压差线性稳压器与督导员 |
| 文件页数： | 16/16页 |
| 文件大小： | 445K |
| 代理商： | TPS726126DCQ |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS726126DCQG4 | 功能描述:低压差稳压器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS726126DCQR | 功能描述:低压差稳压器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS726126DCQRG4 | 功能描述:低压差稳压器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS72615DCQ | 功能描述:低压差稳压器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TPS72615DCQG4 | 功能描述:低压差稳压器 - LDO Low Input Voltage Any Cap 1A RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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