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參數(shù)資料
| 型號： | TPS75633KTTR |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | FAST-TRANSIENT RESPONSE 5-A LOW-DROPOUT VOLTAGE REGULATORS |
| 中文描述： | 快速瞬態(tài)響應5 -低壓差電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 15/24頁 |
| 文件大?。?/td> | 450K |
| 代理商： | TPS75633KTTR |
www.ti.com
1
10
0
10
20
–
PD
POWER DISSIPATION LIMIT
vs
HEATSINK THERMAL RESISTANCE
R
θ
SA
– Heatsink Thermal Resistance –
°
C/W
No Heatsink
T
A
= 55
°
C
Natural Convection
Air Flow = 150 LFM
Air Flow = 250 LFM
Air Flow = 500 LFM
TO-263 Power Dissipation
The TO-263 package provides an effective means of managing power dissipation in surface-mount applications.
The TO-263 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 TO-263 package enhances the thermal performance of the
package.
P
D
max
(3.3 – 2.5) V x 3 A
2.4 W
(7)
R
θ
JAmax
From Figure 25, R
Θ
JA
vs Copper Heatsink Area, the ground plane needs to be 2 cm
2
for the part to dissipate 2.4
W. The model operating environment used in the computer model to construct Figure 25 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 26 shows the side view
of the operating environment used in the computer model.
(125 – 55)
°
C 2.4 W
29
°
C W
(8)
TPS75601, TPS75615
TPS75618, TPS75625
TPS75633
SLVS329C–JUNE 2001–REVISED MARCH 2004
THERMAL INFORMATION (continued)
Figure 24.
To illustrate, the TPS75625 in a TO-263 package was chosen. For this example, the average input voltage is 3.3
V, the average output voltage is 2.5 V, the average output current is 3 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 T
J
max for T
J
into Equation 4 gives Equation 8:
15
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| TPS75633KTTRG3 | 功能描述:低壓差穩(wěn)壓器 - LDO 5-A 3.3-V LDO 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS75633KTTT | 功能描述:低壓差穩(wěn)壓器 - LDO 5-A 3.3-V LDO 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS75633KTTTG3 | 功能描述:低壓差穩(wěn)壓器 - LDO 5-A 3.3-V LDO 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS75701KC | 功能描述:低壓差穩(wěn)壓器 - LDO LDO Adjustable Output 3A 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS75701KCG3 | 功能描述:低壓差穩(wěn)壓器 - LDO LDO Adjustable Output 3A 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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