參數(shù)資料
型號: LTC1265-5
廠商: Linear Technology Corporation
英文描述: 1.2A, High Efficiency Step-Down Current Mode DC/DC Converter(5V,12A,高效率,電流模式步降DC/DC變換器)
中文描述: 1.2A的,高效率降壓型電流模式的DC / DC轉(zhuǎn)換器(5V的,12A條,高效率,電流模式步降直流/直流變換器)
文件頁數(shù): 1/16頁
文件大?。?/td> 233K
代理商: LTC1265-5
1
LTC1265/LTC1265-3.3/LTC1265-5
1.2A, High Efficiency
Step-Down DC/DC Converter
V
IN
5.4V TO
12V
L1*
33
μ
H
R
**
0.1
V
OUT
5V
1A
C
OUT
220
μ
F
10V
1000pF
130pF
3900pF
1k
0.1
μ
F
C
IN
68
μ
F
20V
D1
PWR V
IN
SHDN
V
IN
SW
PGND
SENSE
+
SENSE
SGND
I
TH
C
T
LTC1265-FO1
*
**
COILTRONICS CTX33-4
IRC LRC2010-01-R100-J
MBRS130LT3
AVX TPSE227K010
AVX TPSE686K020
LTC1265-5
+
+
Figure 1. High Efficiency Step-Down Converter
I
High Efficiency: Up to 95%
I
Current Mode Operation for Excellent Line and Load
Transient Response
I
Internal 0.3
Power Switch (V
IN
= 10V)
I
Short-Circuit Protection
I
Low Dropout Operation: 100% Duty Cycle
I
Low-Battery Detector
I
Low 160
μ
A Standby Current at Light Loads
I
Active-High Micropower Shutdown: I
Q
< 15
μ
A
I
Peak Inductor Current Independent of Inductor Value
I
Available in 14-pin SO Package
APPLICATIU
The LTC
1265 is a monolithic step-down current mode
DC/DC converter featuring Burst Mode
TM
operation at low
output current. The LTC1265 incorporates a 0.3
switch
(V
IN
=10V) allowing up to 1.2A of output current.
Under no load condition, the converter draws only 160
μ
A.
In shutdown it typically draws a mere 5
μ
A making this
converter ideal for current sensitive applications. In drop-
out the internal P-channel MOSFET switch is turned on
continuously maximizing the life of the battery source. The
LTC1265 incorporates automatic power saving Burst Mode
operation to reduce gate charge losses when the load
currents drop below the level required for continuous
operation.
The inductor current is user-programmable via an external
current sense resistor. Operation up to 700kHz permits
the use of small surface mount inductors and capacitors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
I
5V to 3.3V Conversion
I
Distributed Power Systems
I
Step-Down Converters
I
Inverting Converters
I
Memory Backup Supply
I
Portable Instruments
I
Battery-Powered Equipment
I
Cellular Telephones
LTC1265-5 Efficiency
Burst Mode is a trademark of Linear Technology Corporation.
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIO
U
LOAD CURRENT (A)
0.01
70
E
75
80
85
90
100
0.10
1.00
LTC1265 TA01
95
V
IN
= 6V
V
IN
= 9V
V
IN
= 12V
L = 33
μ
H
V
OUT
= 5V
R
SENSE
= 0.1
C
T
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LTC1265CS 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準包裝: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
LTC1265CS#PBF 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準包裝: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
LTC1265CS#TR 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準包裝: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
LTC1265CS#TRPBF 功能描述:IC REG BUCK ADJ 1.2A 14SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準包裝: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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