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GE1085 の電気的特性と機能

GE1085のメーカーはGTMです、この部品の機能は「3A Low Dropout Positive Adjustable」です。


製品の詳細 ( Datasheet PDF )

部品番号 GE1085
部品説明 3A Low Dropout Positive Adjustable
メーカ GTM
ロゴ GTM ロゴ 




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GE1085 Datasheet, GE1085 PDF,ピン配置, 機能
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ISSUED DATE :2005/06/01
REVISED DATE :2006/06/01B
GE1085
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Description
The GE1085 is a low dropout positive adjustable or fixed-mode regulator with minimum of 3A output current
capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications
such as high-speed bus termination and low current 3.3V logic supply. GE1085 is also well suited for other
applications such as VGA cards. GE1085 is guaranteed to have <1.4V dropout at full load current making it
ideal to provide well-regulated outputs of 1.25 to 5.0V with 4.7 to 12V input supply by different output voltage.
Features
3-Terminal Adjustable or fixed 1.5V,1.8V,2.5V,3.3V,5.0V
1.4V Maximum Dropout at Full Load current
Fast Transient response
Built-in Thermal Shutdown
Output current limiting
Package Dimensions
Typical Circuit
3.3V/3A
Block Diagram
REF.
A
b
c
D
E
L4
L5
Millimeter
Min. Max.
4.40 4.80
0.76 1.00
0.36 0.50
8.60 9.00
9.80 10.4
14.7 15.3
6.20 6.60
REF.
c1
b1
L
e
L1
Ø
A1
Millimeter
Min. Max.
1.25 1.45
1.17 1.47
13.25 14.25
2.54 REF.
2.60 2.89
3.71 3.96
2.60 2.80
2.5V/3A
GE1085
Page: 1/4

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GE1085 pdf, ピン配列
ISSUED DATE :2005/06/01
REVISED DATE :2006/06/01B
Functional Description
Introduction
The GE1085 adjustable or fixed-mode Low Dropout (LDO) regulator is a 3 terminal device which can easily be
programmed by internal mask change to any voltage within the range of 1.25 to Vin-1.4V. The GE1085 only needs 1.4V
differential between Vin and Vout to maintain output regulation, in addition, the output voltage tolerances are also extremely
tight and they include the transient response as port of the specification. For example, Intel VRE specification calls for a
total of ±100mV including initial tolerance, load regulation and 0 to 3A load step. The GE1085 is specifically designed to
meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with
the need for fewer output capacitors.
Load Regulation
Since the GE1085 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the
load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode.
Stability
The GE1085 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator
stable .For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient
response.
Thermal Design
The GE1085 incorporates an internal shutdown that protects the device when the junction temperature exceeds the
maximum allowable junction temperatures. Although this device can operate with junction temperatures in the range of
150 , it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the
junction temperature is kept below the temperature.
Layout Consideration
The output capacitors must be located as close to the Vout terminal of the device as possible .It is recommended to use a
section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency
oscillation that may result due to excessive trace inductance.
GE1085
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共有リンク

Link :


部品番号部品説明メーカ
GE1084

5A Low Dropout Positive Adjustable

GTM
GTM
GE1085

3A Low Dropout Positive Adjustable

GTM
GTM
GE1086

1.5A Low Dropout Positive Adjustable

GTM
GTM


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