- 您现在的位置：买卖IC网 > PDF目录67757 > LT1937ES5#PBF (LINEAR TECHNOLOGY CORP) 0.32 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO5 PDF资料下载
参数资料
| 型号： | LT1937ES5#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.32 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | PLASTIC, TSOT-23, 5 PIN |
| 文件页数： | 1/12页 |
| 文件大小： | 355K |
| 代理商： | LT1937ES5#PBF |
1
LT1937
1937f
White LED
Step-Up Converter in
SC70 and ThinSOT
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LT
1937 is a step-up DC/DC converter specifically
designed to drive white LEDs with a constant current. The
device can drive two, three or four LEDs in series from a
Li-Ion cell. Series connection of the LEDs provides iden-
tical LED currents resulting in uniform brightness and
eliminating the need for ballast resistors. The LT1937
switches at 1.2MHz, allowing the use of tiny external
components. The output capacitor can be as small as
0.22
F, saving space and cost versus alternative solu-
tions. A low 95mV feedback voltage minimizes power loss
in the current setting resistor for better efficiency.
The LT1937 is available in low profile SC70 and ThinSOT
packages.
s
Inherently Matched LED Current
s
High Efficiency: 84% Typical
s
Drives Up to Four LEDs from a 3.2V Supply
s
Drives Up to Six LEDs from a 5V Supply
s
36V Rugged Bipolar Switch
s
Fast 1.2MHz Switching Frequency
s
Uses Tiny 1mm Tall Inductors
s
Requires Only 0.22
F Output Capacitor
s
Low Profile SC70 and ThinSOT
TM Packaging
s
Cellular Phones
s
PDAs, Handheld Computers
s
Digital Cameras
s
MP3 Players
s
GPS Receivers
ThinSOT is a trademark of Linear Technology Corporation.
LED CURRENT (mA)
0
60
EFFICIENCY
(%)
65
70
75
80
85
90
VIN = 3V
510
15
20
1937 TA01b
VIN = 3.6V
Figure 1. Li-Ion Powered Driver for Three White LEDs
Conversion Efficiency
VIN
SW
LT1937
L1
22
H
C1
1
F
C2
0.22
F
15mA
1937 F01a
VIN
3V TO 5V
OFF ON
SHDN
R1
6.34
C1, C2: X5R OR X7R DIELECTRIC
D1: CENTRAL SEMICONDUCTOR CMDSH-3
L1: MURATA LQH3C-220 OR EQUIVALENT
FB
LED 3
LED 2
LED 1
D1
GND
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
相关PDF资料 |
PDF描述 |
|---|---|
| LT1937ES5#TR | 0.32 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO5 |
| LT1937ESC6#PBF | 0.32 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6 |
| LT3484EDCB-0#PBF | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| LT3484EDCB-2#PBF | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| LT3484EDCB-1#PBF | SPECIALTY ANALOG CIRCUIT, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1937ESC6 | 制造商:LINER 制造商全称:Linear Technology 功能描述:White LED Step-Up Converter in SC70 and ThinSOT |
| LT1937ESC6#PBF | 制造商:Linear Technology 功能描述:LED DRVR 6Segment 3.3V/5V/9V 6-Pin SC-70 制造商:Linear Technology 功能描述:SP-SWREG/LED Driver, CUT TAPE White LED Step-up Converter |
| LT1937ESC6#TR | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-6 RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LT1937ESC6#TRM | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-6 RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LT1937ESC6#TRMPBF | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-6 RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
发布紧急采购，3分钟左右您将得到回复。