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參數(shù)資料
| 型號(hào)： | LT1767-3.3 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 242K |
| 代理商： | LT1767-3.3 |
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LT1767/LT1767-1.8/
LT1767-2.5/LT1767-3.3/LT1767-5
Monolithic 1.5A, 1.25MHz
Step-Down Switching Regulators
sn1767 1767fas
I
1.5A Switch in a Small MSOP Package
I
Constant 1.25MHz Switching Frequency
I
High Power Exposed Pad (MS8E) Package
I
Wide Operating Voltage Range: 3V to 25V
I
High Efficiency 0.22
Switch
I
1.2V Feedback Reference Voltage
I
Fixed Output Voltages of 1.8V, 2.5V, 3.3V, 5V
I
2% Overall Output Tolerance
I
Uses Low Profile Surface Mount Components
I
Low Shutdown Current: 6
μ
A
I
Synchronizable to 2MHz
I
Current Mode Loop Control
I
Constant Maximum Switch Current Rating at All Duty
Cycles*
APPLICATIU
The LT
1767 is a 1.25MHz monolithic buck switching
regulator. A high efficiency 1.5A, 0.22
switch is included
on the die together with all the control circuitry required to
complete a high frequency, current mode switching regu-
lator. Current mode control provides fast transient re-
sponse and excellent loop stability.
New design techniques achieve high efficiency at high
switching frequencies over a wide operating range. A low
dropout internal regulator maintains consistent perfor-
mance over a wide range of inputs from 24V systems to Li-
Ion batteries. An operating supply current of 1mA im-
proves efficiency, especially at lower output currents.
Shutdown reduces quiescent current to 6
μ
A. Maximum
switch current remains constant at all duty cycles. Syn-
chronization allows an external logic level signal to in-
crease the internal oscillator from 1.4MHz to 2MHz.
The LT1767 is available in an 8-pin MSOP fused leadframe
package and a low thermal resistance exposed pad pack-
age. Full cycle-by-cycle short-circuit protection and ther-
mal shutdown are provided. High frequency operation
allows the reduction of input and output filtering compo-
nents and permits the use of chip inductors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
*Patent Pending
I
DSL Modems
I
Portable Computers
I
Wall Adapters
I
Battery-Powered Systems
I
Distributed Power
Efficiency vs Load Current
12V to 3.3V Step-Down Converter
BOOST
LT1767-3.3
V
IN
OUTPUT
3.3V
1.2A*
V
IN
12V
1767 TA01
C2
0.1
μ
F
C
C
1.5nF
R
4.7k
D1
UPS120
C1
10
μ
F
CERAMIC
C3
2.2
μ
F
CERAMIC
D2
CMDSH-3
L1
5
μ
H
V
SW
FB
SHDN
SYNC
OPEN
OR
HIGH
= ON
GND
V
C
*MAXIMUM OUTPUT CURRENT IS SUBJECT TO THERMAL DERATING.
LOAD CURRENT (A)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
E
1767 TA01a
95
90
85
80
75
70
V
IN
= 10V
V
OUT
= 5V
V
IN
= 5V
V
OUT
= 3.3V
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1767-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators |
| LT1767EMS8 | 功能描述:IC REG BUCK ADJ 1.5A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT1767EMS8#PBF | 功能描述:IC REG BUCK ADJ 1.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1767EMS8#TRPBF | 功能描述:IC REG BUCK ADJ 1.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT1767EMS8-1.8 | 功能描述:IC REG BUCK 1.8V 1.5A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開(kāi)關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
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