LT1939
24
1939f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
?/DIV>
FAX: (408) 434-0507
?
www.linear.com
?LINEAR TECHNOLOGY CORPORATION 2008
LT 0108 " PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER DESCRIPTION
COMMENTS
LT1766
60V, 1.2A (I
OUT
), 200kHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 5.5V to 60V, V
OUT(MIN)
= 1.20V, I
Q
= 2.5mA, I
SD
= 25糀,
16-Lead TSSOPE Package
LT1933
36V, 500mA (I
OUT
), 500kHz Step-Down Switching Regulator in
SOT-23
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 1.2V, I
Q
= 1.6mA, I
SD
< 1糀,
ThinSOT
TM
Package
LT1936
36V, 1.4A (I
OUT
), 500kHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 1.2V, I
Q
= 1.9mA, I
SD
< 1糀,
8-Lead MS8E Package
LT1940
Dual 25V, 1.4A (I
OUT
), 1.1MHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.6V to 25V, V
OUT(MIN)
= 1.20V, I
Q
= 3.8mA, I
SD
< 30糀,
16-Lead TSSOPE Package
LTC3407/LTC3407-2 Dual 600mA/800mA, 1.5MHz/2.25MHz Synchronous Step-Down
DC/DC Converter
V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40糀, I
SD
< 1糀,
3mm ?3mm DFN and 10-Lead MS10E Packages
LT3434/LT3435 60V, 2.4A (I
OUT
), 200kHz/500kHz High Ef ciency Step-Down DC/DC
Converters with Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.20V, I
Q
= 100糀, I
SD
< 1糀,
16-Lead TSSOPE Package
LT3437
60V, 400mA (I
OUT
), Micropower Step-Down DC/DC Converter with
Burst Mode Operation
V
IN
: 3.3V to 60V, V
OUT(MIN)
= 1.25V, I
Q
= 100糀, I
SD
< 1糀,
10-Lead 3mm ?3mm DFN, 16-Lead TSSOPE Package
LT3493
36V, 1.4A (I
OUT
), 750kHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 1.9mA, I
SD
< 1糀,
6-Lead 2mm ?3mm DFN Package
LT3501
Dual 25V, 3A (I
OUT
), 1.5MHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.3V to 25V, V
OUT(MIN)
= 0.8V, I
Q
= 3.7mA, I
SD
< 10糀,
20-Lead TSSOPE Package
LT3502/LT3502A 40V, 500mA (I
OUT
), 1.1MHz/2.2MHz High Ef ciency Step-Down
DC/DC Converter
V
IN
: 3V to 40V, V
OUT(MIN)
= 0.8V, I
Q
= 1.5mA, I
SD
< 2糀,
8-Lead 2mm ?2mm DFN Package
LT3503
20V, 1A (I
OUT
), 2.2MHz High Ef ciency Step-Down DC/DC Converter V
IN
: 3.6V to 20V, V
OUT(MIN)
= 0.78V, I
Q
= 1.9mA, I
SD
< 1糀,
6-Lead 2mm ?3mm DFN Package
LT3505
36V, 1.2A (I
OUT
), 3MHz High Ef ciency Step-Down DC/DC Converter V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.78V, I
Q
= 2mA, I
SD
< 2糀,
8-Lead 3mm ?3mm DFN and MSE Packages
LT3506/LT3506A Dual 25V, 1.6A (I
OUT
), 575kHz/1.1MHz High Ef ciency Step-Down
DC/DC Converters
V
IN
: 3.6V to 25V, V
OUT(MIN)
= 0.8V, I
Q
= 3.8mA, I
SD
< 30糀,
16-Lead 4mm ?5mm DFN and TSSOPE Packages
LT3508
Dual 36V, 1.4A (I
OUT
), 2.5MHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 4.3mA, I
SD
< 1糀,
24-Lead 4mm ?4mm QFN and 16-Lead TSSOPE Packages
LT3510
Dual 25V, 2A (I
OUT
), 1.5MHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.3V to 25V, V
OUT(MIN)
= 0.8V, I
Q
= 3.7mA, I
SD
< 10糀,
20-Lead TSSOPE Package
LTC3548
Dual 400mA/800mA, 2.25MHz Synchronous Step-Down DC/DC
Converter
V
IN
: 2.5V to 5.5V, V
OUT(MIN)
= 0.6V, I
Q
= 40糀, I
SD
< 1糀,
3mm ?3mm DFN and 10-Lead MSE Packages
LT3680
36V, 3.5A (I
OUT
), 2.4MHz High Ef ciency Step-Down DC/DC
Converter
V
IN
: 3.6V to 36V, V
OUT(MIN)
= 0.79V, I
Q
= 75糀, I
SD
< 1糀,
3mm ?3mm DFN and MS10E Packages
LT3500
40V, 2A (I
OUT
), 2.2MHz High Ef ciency Step-Down DC/DC Converter V
IN
: 28V to 36V, V
OUT(MIN)
= 0.8V, I
Q
= 75糀, I
SD
< 12糀,
3mm ?3mm DFN
1.8V/2A Step-Down Regulator
L1
2.2糎
D1
D2
C1
2.2糉
C2
0.47糉
C5
0.47糉
C7
22糉
C3
220pF
R5
40.2k
R2
8.06k
R6
49.9k
R1
10k
R3
24.9k
R4
8.06k
4.5V TO 25V
C6
1糉
1939 TA05
V
OUT1
1.8V
2A
V
OUT2
3.3V
10mA
LDRV
V
IN
LFB
BST
SHDN
SS
LT1939
R
T
/SYNC
V
C
SW
FB
PG
PG
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
LT3092MPST#TRPBF
IC PROG CURRENT SOURCE SOT223-3
LT3150CGN#TRPBF
IC REG CTRLR SGL POS ADJ 16-SSOP
LT3500HMSE#TRPBF
IC REG DL BUCK/LINEAR 16-MSOP
LT3507HUHF#TRPBF
IC REG QD BUCK/LINEAR 38-QFN
LT3570IFE#TRPBF
IC REG BUCK/BST/LINEAR 20TSSOP
LT3645HMSE#TRPBF
IC REG DL BUCK/LINEAR 12-MSOP
LT3694IFE-1#TRPBF
IC REG TRPL BUCK/LINEAR 20TSSOP
LT4220IGN#TR
IC CTLR HOTSWAP DUAL 16-SSOP
相关代理商/技术参数
LT1939IDD-PBF
制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1939IDD-TRPBF
制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller
LT1940
制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator
LT1940EFE
功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT
LT1940EFE#PBF
功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2
LT1940EFE#TR
功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT
LT1940EFE#TRPBF
功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT
LT1940EFEPBF
制造商:Linear Technology 功能描述:LT1940 adj 1.4A SD dc-dc converter