- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382258 > LTC1872 (Linear Technology Corporation) Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23 PDF資料下載
參數(shù)資料
| 型號： | LTC1872 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23 |
| 中文描述： | 恒定頻率電流模式升壓型DC / DC控制器，采用SOT - 23 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 182K |
| 代理商： | LTC1872 |
1
LTC1872
APPLICATIU
FEATURES
DESCRIPTIOU
The LTC
1872 is a constant frequency current mode step-
up DC/DC controller providing excellent AC and DC load
and line regulation. The device incorporates an accurate
undervoltage lockout feature that shuts down the LTC1872
when the input voltage falls below 2.0V.
The LTC1872 boasts a
±
2.5% output voltage accuracy and
consumes only 270
μ
A of quiescent current. For applica-
tions where efficiency is a prime consideration, the LTC1872
is configured for Burst Mode operation, which enhances
efficiency at low output current.
In shutdown, the device draws a mere 8
μ
A. The high
550kHz constant operating frequency allows the use of a
small external inductor.
The LTC1872 is available in a small footprint 6-lead
SOT-23.
TYPICAL APPLICATIO
N
U
Constant Frequency
Current Mode Step-Up
DC/DC Controller in SOT-23
I
Lithium-Ion-Powered Applications
I
Cellular Telephones
I
Wireless Modems
I
Portable Computers
I
Scanners
I
High Efficiency: Over 90%
I
High Output Currents Easily Achieved
I
Wide V
IN
Range: 2.5V to 9.8V
I
V
OUT
Limited Only by External Components
I
Constant Frequency 550kHz Operation
I
Burst Mode
TM
Operation at Light Load
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Low Quiescent Current: 270
μ
A
I
Shutdown Mode Draws Only 8
μ
A Supply Current
I
±
2.5% Reference Accuracy
I
Tiny 6-Lead SOT-23 Package
Efficiency vs Load Current
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
I
TH
/RUN
LTC1872
147k
422k
80.6k
R1
0.03
L1
4.7
μ
H
220pF
C1: TAIYO YUDEN CERAMIC EMK325BJ106MNT
C2: MURATA GRM42-2X5R226K6.3
D1: IR10BQ015
L1: MURATA LQN6C4R7M04
M1: IRLMS2002
R1: DALE 0.25W
GND
V
FB
5
4
6
1872 TA01
1
2
3
NGATE
V
IN
SENSE
–
C1
10
μ
F
10V
V
IN
3.3V
V
OUT
5V
1A
C2
2
×
22
μ
F
6.3V
+
M1
D1
Figure 1. LTC1872 High Output Current 3.3V to 5V Boost Converter
LOAD CURRENT (mA)
1
E
100
95
90
85
80
75
70
65
10
100
1000
1872 TA01b
V
IN
= 3.3V
V
OUT
= 5V
相關PDF資料 |
PDF描述 |
|---|---|
| LTC1872ES6 | Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23 |
| LTC1876 | High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator |
| LTC1876EG | High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator |
| LTC1877EMS8 | High Efficiency Monolithic Synchronous Step-Down Regulator |
| LTC1878EMS8 | High Efficiency Monolithic Synchronous Step-Down Regulator |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1872BES6 | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Up 2.5V to 9.8V Input 6-Pin TSOT-23 |
| LTC1872BES6#PBF | 制造商:Linear Technology 功能描述:DC-DC CONTROLLER BOOST 550KH 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BOOST, 550KHZ, SOT-23-6; Primary Input Voltage:9.8V; No. of Outputs:1; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-SOT-23 ;RoHS Compliant: Yes |
| LTC1872BES6#TR | 功能描述:IC REG CTRLR BST PWM CM SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC1872BES6#TRM | 功能描述:IC REG CTRLR BST PWM CM SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC1872BES6#TRMPBF | 功能描述:IC REG CTRLR BST PWM CM SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
發(fā)布緊急采購，3分鐘左右您將得到回復。