- 您现在的位置：买卖IC网 > PDF目录64981 > GM6605-5.0TA3R (American Power Management Inc.) 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS PDF资料下载
参数资料
| 型号： | GM6605-5.0TA3R |
| 厂商： | American Power Management Inc. |
| 英文描述： | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| 中文描述： | 5.0a中低压差型精密线性稳压器 |
| 文件页数： | 7/10页 |
| 文件大小： | 162K |
| 代理商： | GM6605-5.0TA3R |
G
M
6
0
5
6
Output Voltage Sensing
GM6605 series is three terminal regulator, so they can-
not provide true remote load sensing. Load regulation
is limited by the resistance of the conductors connect-
ing the regulator to the load. For best results, Gm6605
should be connected as shown in Figure 2.
Calculating Power Dissipation and Heat
Sink Requirements
GM6605 series precision linear regulators include ther-
mal shutdown and current limit circuitry to protect the
devices. However, high power regulators normally oper-
ate at high junction temperatures so it is important to
calculate the power dissipation and junction tempera-
tures accurately to be sure that you use and adequate
heat sink. The case is connected to V
on GM6605.
OUT
so electrical isolation may be required for some appli-
cations. Thermal compound should always be used
with high current regulators like GM6605.
GM6605-3.3
V
IN
V
OUT
R
LOAD
R
C
GND
V
IN
Conductor
Parasitic
Resistance
(a) Fixed Version
(b) Adjustable Version
GM6605-A
ADJ
V
OUT
V
IN
V
IN
R
C
R
LOAD
R1
R2
(a),(b)
Figure 2
Conductor Parasitic Resistance Effects are
Minimized by this Grounding Scheme For Fixed
and Adjustable Output Regulators
The thermal characteristics of an IC depend on four
factors:
1. Maximum Ambient Temperature T (°C)
A
2. Power Dissipation P (Watts)
D
3. Maximum Junction Temperature T (°C)
J
4. Thermal Resistance Junction to ambient R
JA
Q
(°C/W)
These relationship of these four factors is expressed
by equation (1):
Maximum ambient temperature and power dissipa-
tion are determined by the design while the maximum
junction temperature and thermal resistance depend
on the manufacturer and the package type.
The maximum power dissipation for a regulator is ex-
pressed by equation (2):
where:
V
is the maximum input voltage,
IN(max)
V
is the minimum output voltage,
OUT(min)
I
is the maximum output current
OUT(max)
I is the maximum quiescent current at I
.
Q
OUT(max)
A heat sink effectively increases the surface area of
the package to improve the flow of heat away from
the IC into the air. Each material in the heat flow path
between the IC and the environment has a thermal re-
sistance. Like series electrical resistances, these re-
sistance are summed to determine R
, the total
Q
JA
thermal resistance between the junction and the air.
This is expressed by equation (3):
Where all of the following are in °C/W:
R
is thermal resistance of junction to case,
Q
JC
R
is thermal resistance of case to heat sink,
Q
CS
R
is thermal resistance of heat sink to ambient air
Q
SA
The value for R
is calculated using equation (3)
Q
JA
and the result can be substituted in equation (1). The
value for R
is 3.5°C/W for a given package type
Q
JC
based on an average die size. For a high current reg-
ulator such as GM6605, the majority of the heat is
generated in the power transistor section.
T = T + P X R
........
JAD
JA
(1)
Q
P
= { V
- V
} I
+ V
I
)
D(max)
IN(max)
OUT(min)
OUT(max
IN(max) Q ........(2)
R
= R
+ R
JA
JC
CS
SA ........(3)
QQQQ
Conductor
Parasitic
Resistance
相关PDF资料 |
PDF描述 |
|---|---|
| GM6605-5.0TA3T | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| GM6605-5.0TB3R | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| GM6605-5.0TB3T | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| GM6605-5.0TC3R | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
| GM6605-5.0TC3T | 5.0A LOW DROPOUT PRECISION LINEAR REGULATORS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| GM6605-ADJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:5.0A PRECISION LINEAR REGULATORS |
| GM6605ATA3R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:5.0A PRECISION LINEAR REGULATORS |
| GM6605-ATA3R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:5.0A PRECISION LINEAR REGULATORS |
| GM6605-ATA3RG | 制造商:GAMMA 制造商全称:GAMMA 功能描述:5.0A LOW DROPOUT PRECISION REGULATOR |
| GM6605ATA3T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:5.0A PRECISION LINEAR REGULATORS |
发布紧急采购，3分钟左右您将得到回复。