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LTC1871EMS-1#PBF PDF预览

LTC1871EMS-1#PBF

更新时间： 2024-02-08 07:11:56
品牌 Logo 应用领域
凌特 - Linear 稳压器开关式稳压器或控制器电源电路电阻器开关式控制器光电二极管
页数 文件大小 规格书
36页 518K
描述
LTC1871-1 - Wide Input Range, No RSENSE Current Mode Boost, Flyback and SEPIC Controller; Package: MSOP; Pins: 10; Temperature Range: -40°C to 85°C

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LTC1871EMS-1#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：MSOP包装说明：TSSOP, TSSOP10,.19,20
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.15模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：36 V最小输入电压：2.5 V
标称输入电压：5 VJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10最高工作温度：85 °C
最低工作温度：最大输出电流：0.02 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BOOST最大切换频率：1000 kHz
技术：CMOS温度等级：OTHER
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3 mm
Base Number Matches：1

LTC1871EMS-1#PBF 数据手册

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LTC1871-1  
Wide Input Range, No R  
™
SENSE  
Current Mode Boost,  
Flyback and SEPIC Controller  
DESCRIPTION  
TheLTC®1871-1isawideinputrange,currentmode,boost,  
flybackorSEPICcontrollerthatdrivesanN-channelpower  
MOSFET and requires very few external components. It  
eliminatestheneedforacurrentsenseresistorbyutilizing  
the power MOSFET’s on-resistance, thereby maximizing  
efficiency.Higheroutputvoltageapplicationsarepossible  
with the LTC1871-1 by connecting the SENSE pin to a  
resistor in the source of the power MOSFET.  
FEATURES  
n
High Efficiency (No Sense Resistor Required)  
n
Wide Input Voltage Range: 2.5V to 36V  
n
Current Mode Control Provides Excellent  
Transient Response  
n
High Maximum Duty Cycle (92% Typ)  
n
2% RUN Pin Threshold with 100mV Hysteresis  
n
1% Internal Voltage Reference  
n
Ultra Low Pulse Skip Threshold for Wide Input  
Range Applications  
The IC’s operating frequency can be set with an external  
resistorovera50kHzto1MHzrange, andcanbesynchro-  
nized to an external clock using the MODE/SYNC pin.  
n
Micropower Shutdown: I = 10μA  
Q
n
Programmable Operating Frequency  
(50kHz to 1MHz) with One External Resistor  
Synchronizable to an External Clock Up to 1.3 × f  
n
n
n
n
n
The LTC1871-1 differs from the LTC1871 by having a  
lower pulse skip threshold, making it ideal for applica-  
tions requiring constant frequency operation at light  
loads. The lower pulse skip threshold also helps maintain  
constant frequency operation in applications with a wide  
input voltage range. For applications requiring primary-  
to-secondary side isolation, please refer to the LTC1871  
datasheet.  
OSC  
User-Controlled Pulse Skip or Burst Mode® Operation  
Internal 5.2V Low Dropout Voltage Regulator  
Output Overvoltage Protection  
Capable of Operating with a Sense Resistor for High  
Output Voltage Applications  
Small 10-Lead MSOP Package  
n
The LTC1871-1 is available in the 10-lead MSOP package.  
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.  
APPLICATIONS  
n
No R  
is a trademark of Linear Technology Corporation. All other trademarks are the  
Telecom Power Supplies  
SENSE  
property of their respective owners.  
n
Portable Electronic Equipment  
TYPICAL APPLICATION  
V
IN  
3.3V  
Efficiency of Figure 1  
L1  
100  
90  
80  
70  
60  
50  
40  
30  
1μH  
D1  
RUN  
SENSE  
Burst Mode  
OPERATION  
V
OUT  
5V  
I
V
IN  
TH  
7A  
C
R
OUT1  
C
+
(10A PEAK)  
LTC1871-1  
INTV  
150μF  
6.3V  
×4  
22k  
PULSE-SKIP  
MODE  
FB  
CC  
C
6.8nF  
C1  
R1  
12.1k  
1%  
C
OUT2  
FREQ  
GATE  
GND  
M1  
22μF  
6.3V  
X5R  
×2  
C
IN  
C
4.7μF  
X5R  
VCC  
+
R2  
37.4k  
1%  
R
T
80.6k  
1%  
MODE/SYNC  
22μF  
6.3V  
×2  
C
C2  
47pF  
GND  
18711 F01a  
C
C
C
:
TAIYO YUDEN JMK325BJ226MM  
: PANASONIC EEFUEOJ151R  
: TAIYO YUDEN JMK325BJ226MM  
D1: MBRB2515L  
IN  
0.001  
0.01  
0.1  
1
10  
L1: SUMIDA CEP125-H 1R0MH  
M1: FAIRCHILD FDS7760A  
OUT1  
OUT2  
OUTPUT CURRENT (A)  
18711 F01b  
Figure 1. High Efficiency 3.3V Input, 5V Output Boost Converter (Bootstrapped)  
18711fb  
1
1234567...36

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