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LTC3822EGN-1 PDF预览

LTC3822EGN-1

更新时间： 2024-02-25 02:38:43
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
24页 371K
描述
No RSENSE, Low Input Voltage, Synchronous Step-Down DC/DC Controller

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中文翻译

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LTC3822EGN-1 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP16,.3
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.18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：4.5 V最小输入电压：2.75 V
标称输入电压：3.3 VJESD-30 代码：R-PDSO-G16
JESD-609代码：e3长度：4.8895 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP16,.3
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：850 kHz技术：CMOS
温度等级：COMMERCIAL EXTENDED端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3.899 mmBase Number Matches：1

LTC3822EGN-1 数据手册

 浏览型号LTC3822EGN-1的Datasheet PDF文件第3页浏览型号LTC3822EGN-1的Datasheet PDF文件第4页浏览型号LTC3822EGN-1的Datasheet PDF文件第5页浏览型号LTC3822EGN-1的Datasheet PDF文件第7页浏览型号LTC3822EGN-1的Datasheet PDF文件第8页浏览型号LTC3822EGN-1的Datasheet PDF文件第9页 
LTC3822-1  
T = 25°C unless otherwise noted.  
TYPICAL PERFORMANCE CHARACTERISTICS  
Pulse Skip Mode Operation  
A
Burst Mode Operation  
V
V
SW  
SW  
2V/DIV  
2V/DIV  
V
V
OUT  
OUT  
20mV/DIV  
20mV/DIV  
AC COUPLED  
AC COUPLED  
I
I
L
L
2A/DIV  
2A/DIV  
38221 G19  
38221 G18  
10µs/DIV  
FIGURE 10 CIRCUIT  
2µs/DIV  
FIGURE 10 CIRCUIT  
V
IN  
V
OUT  
= 3.3V  
V
IN  
V
OUT  
= 3.3V  
= 1.8V, 100mA  
= 1.8V, 100mA  
(DD/GN)  
PIN FUNCTIONS  
PLLLPF (Pin 1/Pin 2): This pin serves as the frequency  
select input and PLL lowpass filter compensation point.  
When SYNC/MODE has a DC voltage on it, tying this pin  
pin using an external resistor divider. The LTC3822-1  
regulates the V voltage to the smaller of 0.6V or the  
FB  
voltage on the TRACK/SS pin. An internal 1µA pull-up  
to GND selects 300kHz operation; tying this pin to V  
current source is connected to this pin. Tying this pin to  
IN  
selects750kHzoperation. Floatingthispinselects550kHz  
operation. When SYNC/MODE has a clock applied to it,  
connect an R-C network from this pin to ground.  
V allows V  
start-up with the internal 1ms soft-start  
IN  
OUT  
clamp. An external soft-start can be programmed by con-  
necting a capacitor between this pin and ground. Do not  
leave this pin floating.  
SYNC/MODE (Pin 2/Pin 3): This pin performs two func-  
tions: 1) external clock synchronization input for phase-  
locked loop and 2) Burst Mode, pulse skipping or forced  
continuous mode select. Applying a clock with frequency  
between 250kHz and 750kHz causes the internal oscilla-  
tor to phase-lock to the external clock and disables Burst  
Mode operation, but allows pulse skipping at low load  
currents.  
V
(Pin 4/Pin 6): Feedback Pin. This pin receives the  
FB  
remotely sensed feedback voltage for the controller from  
an external resistor divider across the output.  
I
(Pin 5/Pin 7): Current Threshold and Error Amplifier  
TH  
Compensation Point. Nominal operating range on this pin  
is from 0.7V to 2V. The voltage on this pin determines the  
threshold of the main current comparator.  
To select Burst Mode operation at light loads, tie this  
RUN (Pin 6/Pin 8): Run Control Input. Forcing this pin  
pin to V . Grounding this pin selects forced continuous  
IN  
below 1.1V shuts down the chip. Driving this pin to V  
or releasing this pin enables the chip to start-up.  
IN  
operation, which allows the inductor current to reverse.  
Tying this pin to a voltage greater than 0.4V and less than  
1.2V selects pulse skipping mode. In these cases, the  
frequency of the internal oscillator is set by the voltage  
on the PLLLPF pin.  
IPRG (Pin 7/Pin 10): Three-State Pin to Select the Maxi-  
mum Peak Sense Voltage Threshold. This pin selects the  
maximum allowed voltage drop between the V and SW  
IN  
pins (i.e., the maximum allowed drop across the external  
TRACK/SS (Pin 3/Pin 5): Tracking Input for the Control-  
topsideMOSFET).TietoV ,GNDorfloattoselect200mV,  
IN  
ler or Optional External Soft-Start Input. This pin allows  
82mV or 125mV respectively.  
the start-up of V  
to “track” the external voltage at this  
OUT  
38221f  
6
1...3456789...24

中文翻译

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