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參數(shù)資料
| 型號： | LT1585CM-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 1.4 V DROPOUT, PSSO2 |
| 封裝： | PLASTIC, D2PAK-3 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 148K |
| 代理商： | LT1585CM-3.3 |
4
LT1585-1.5/LT1585A-1.5
SW
W
APPLICATIO
S I
FOR
ATIO
U
General
The LT1585-1.5/LT1585A-1.5 3-terminal regulators are
easy to use and have all the protection features expected
in high performance linear regulators. The devices are
short-circuit protected, safe-area protected and provide
thermal shutdown to turn off the regulators if the junction
temperature exceeds about 150
°
C.
The ICs are pin compatible with the LT1083/LT1084/LT1085
family of linear regulators but offer lower dropout voltage
and faster transient response. The trade-off for this im-
proved performance is a 7V maximum supply voltage.
Similar to the LT1083/LT1084/LT1085 family, the LT1585-
1.5/LT1585A-1.5 regulators require an output capacitor for
stability. However, the improved frequency compensation
permits the use of capacitors with much lower ESR while still
maintaining stability. This is critical in addressing the needs
of modern low voltage, high speed microprocessors.
Current generation microprocessors and their associated
circuitry cycle load current from almost zero to several
amps in tens of nanoseconds. Output voltage tolerances
are tighter and include transient response as part of the
specification. The LT1585-1.5/LT1585A-1.5 are specifi-
cally designed to meet the fast current load step require-
W
U
U
ments of these applications and save total cost by needing
less output capacitance in order to maintain regulation.
Stability
The circuit design in the LT1585-1.5/LT1585A-1.5 re-
quires the use of an output capacitor as part of the
frequency compensation. For all operating conditions, the
addition of a 22
μ
F solid tantalum or a 100
μ
F aluminum
electrolytic on the output ensures stability. Normally, the
LT1585-1.5/LT1585A-1.5 can use smaller value capaci-
tors. Many different types of capacitors are available and
have widely varying characteristics. These capacitors differ
in capacitor tolerance (sometimes ranging up to
±
100%),
equivalent series resistance, equivalent series inductance
and capacitance temperature coefficient. The LT1585-1.5/
LT1585A-1.5 frequency compensation optimizes frequency
response with low ESR capacitors. In general, use capaci-
tors with an ESR of less than 1
.
Normally, capacitor values on the order of several hundred
microfarads are used on the output of the regulators to
ensure good transient response with heavy load current
changes. Output capacitance can increase without limit
and larger values of output capacitance further improve the
THERMAL
LIMIT
GND
V
IN
V
OUT
1585-1.5 SS
–
+
相關PDF資料 |
PDF描述 |
|---|---|
| LT1585CM-3.38 | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| LT1585CM-3.45 | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| LT1585CM-3.6 | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| LT1585CT-3.3 | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
| LT1585CT-3.38 | 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1585CMPBF | 制造商:Linear Technology 功能描述:LT1585CMPBF |
| LT1585CT | 功能描述:IC REG LDO ADJ TO220-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構:正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標準）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最?。?300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應商設備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6 |
| LT1585CT#PBF | 功能描述:IC REG LDO ADJ TO220-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構:正，固定式 輸出電壓:8V 輸入電壓:10.5 V ~ 23 V 電壓 - 壓降（標準）:1.7V @ 40mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:100mA（最小值） 電流 - 限制（最小）:- 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1075 (CN2011-ZH PDF) 其它名稱:296-24390-1 |
| LT1585CT-1.5 | 功能描述:IC REG LDO 1.5V TO220-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構:正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標準）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最小）:300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應商設備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6 |
| LT1585CT-1.5#PBF | 功能描述:IC REG LDO 1.5V TO220-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構:正，固定式 輸出電壓:3V 輸入電壓:2.3 V ~ 5.5 V 電壓 - 壓降（標準）:0.035V @ 150mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:150mA 電流 - 限制（最?。?300mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 裸露焊盤，6-TMLF? 供應商設備封裝:6-TMLF?（1.6x1.6） 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1104 (CN2011-ZH PDF) 其它名稱:576-3018-6 |
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