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參數(shù)資料
| 型號(hào)： | LT1580CT |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PSFM5 |
| 封裝： | PLASTIC, TO-220, 5 PIN |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LT1580CT |
6
LT1580/LT1580-2.5
BLOCK DIAGRA
–
+
V
CONTROL
V
POWER
SENSE
V
OUT
1580 BD
FOR FIXED
VOLTAGE
DEVICE
GND
ADJ
APPLICATIO
S I
FOR
ATIO
U
The LT1580 is a low dropout regulator designed to power
the new generation of microprocessors. Low dropout
regulators have become more common in desktop com-
puter systems as microprocessor manufacturers have
moved away from 5V only CPUs. A wide range of supply
requirements exists today with new voltages just over the
horizon. In many cases the input-output differential is very
small, effectively disqualifying many of the low dropout
regulators on the market today. The LT1580 is designed to
make use of multiple power supplies, present in most
systems, to reduce the dropout voltage. This two supply
approach maximizes efficiency.
The second supply, at least 1V greater than the output
voltage, is used to provide power for the control circuitry
and supply the drive current to the NPN output transistor.
This allows the NPN to be driven into saturation, thereby
W
U
U
reducing the dropout voltage by a V
BE
compared to
conventional designs. The current requirement for the
control voltage is relatively small, equal to approximately
1% of the output current or about 70mA for a 7A load. The
bulk of this current is drive current for the NPN output
transistor. This drive current becomes part of the output
current.
The control voltage must be at least 1V greater than the
output voltage to obtain optimum performance. The maxi-
mum voltage on the V
CONTROL
pin is 13V. The maximum
voltage at the V
POWER
pin is limited to 7V. GDN pin current
for fixed voltage devices is 6mA (typ) and is constant as a
function of load. ADJ pin current for adjustable devices is
60
μ
A at 25
°
C and varies proportional to absolute tempera-
ture.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1580I | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1580IQ | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1580IT | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1580IR-2.5 | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1580IT7-2.5 | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1580CT#06 | 制造商:Linear Technology 功能描述:7A Low Dropout HS Volt Reg |
| LT1580CT#06PBF | 功能描述:IC CONV PENTIUM PROCESSR TO220-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| LT1580CT#PBF | 功能描述:IC LDO REGULATOR 7A ADJ TO220-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調(diào)至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LT1580CT33 | 制造商:LT 功能描述:* |
| LT1580CT7-2.5 | 功能描述:IC LDO REGULATOR 7A 2.5V TO220-7 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
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