參數資料
型號： LT1961IMS8E
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO8
封裝： PLASTIC, MSOP-8
文件頁數： 1/16頁
文件大?。?/td> 154K
代理商： LT1961IMS8E
1
LT1961
1961fa
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
1.5A, 1.25MHz Step-Up
Switching Regulator
■ 1.5A Switch in a Small MSOP Package
■
Constant 1.25MHz Switching Frequency
■ Wide Operating Voltage Range: 3V to 25V
■ High Efficiency 0.2
Ω Switch
■
1.2V Feedback Reference Voltage
■
±2% Overall Output Voltage Tolerance
■ Uses Low Profile Surface Mount External
Components
■ Low Shutdown Current: 6
μA
■ Synchronizable from 1.5MHz to 2MHz
■
Current-Mode Loop Control
■ Constant Maximum Switch Current Rating at All Duty
Cycles*
■
Thermally Enhanced Exposed Pad 8-Lead Plastic
MSOP Package
The LT
1961 is a 1.25MHz monolithic boost switching
regulator. A high efficiency 1.5A, 0.2
Ω 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 voltage range.
A low dropout internal regulator maintains consistent
performance over a wide range of inputs from 24V sys-
tems to Li-Ion batteries. An operating supply current of
1mA maintains high efficiency, especially at lower output
currents. Shutdown reduces quiescent current to 6
μA.
Maximum switch current remains constant at all duty
cycles. Synchronization allows an external logic level
signal to increase the internal oscillator from 1.5MHz to
2MHz.
The LT1961 is available in an exposed pad, 8-pin MSOP
package. Full cycle-by-cycle switch current limit protec-
tion and thermal shutdown are provided. High frequency
operation allows the reduction of input and output filtering
components and permits the use of chip inductors.
■ DSL Modems
■ Portable Computers
■ Battery-Powered Systems
■ Distributed Power
Efficiency vs Load Current
5V to 12V Boost Converter
LT1961
VIN
VOUT
12V
0.5A*
VIN
5V
1961 TA01
6800pF
100pF
6.8k
10k
1%
90.9k
UPS120
10
μF
CERAMIC
2.2
μF
CERAMIC
VSW
FB
SHDN
OPEN
OR
HIGH
= ON
GND
VC
SYNC
*MAXIMUM OUTPUT CURRENT IS SUBJECT TO THERMAL DERATING.
6.8
μH
2
6
7
3,4
8
5
1
LOAD CURRENT (mA)
0
EFFICIENCY
(%)
90
85
80
75
70
65
60
100
200
300
400
1961 TA01a
500
VIN = 5V
VOUT = 12V
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. *Patent Pending
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相關代理商/技術參數
參數描述
LT1961IMS8E#PBF 功能描述:IC REG BOOST ADJ 1.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數:1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關:600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應商設備封裝:8-SOIC
LT1961IMS8E#TRPBF 功能描述:IC REG BOOST ADJ 1.5A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數:1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關:600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應商設備封裝:8-SOIC
LT1961IMS8EPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 1.25MHz Step-Up Switching Regulator
LT1961IMS8ETR 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 1.25MHz Step-Up Switching Regulator
LT1961IMS8ETRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 1.25MHz Step-Up Switching Regulator
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