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LTC3826IG-1#TR PDF预览

LTC3826IG-1#TR

更新时间： 2024-02-07 18:33:57
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
32页 424K
描述
IC 3 A DUAL SWITCHING CONTROLLER, 585 kHz SWITCHING FREQ-MAX, PDSO28, 5.30 MM, PLASTIC, SSOP-28, Switching Regulator or Controller

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LTC3826IG-1#TR 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, SSOP28,.3
针数：28Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.21Is Samacsys：N
模拟集成电路 - 其他类型：DUAL 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：4 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G28JESD-609代码：e3
长度：10.2 mm湿度敏感等级：1
功能数量：1端子数量：28
最高工作温度：85 °C最低工作温度：
最大输出电流：3 A封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP28,.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：2 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PHASE-SHIFT
最大切换频率：585 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：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：5.3 mmBase Number Matches：1

LTC3826IG-1#TR 数据手册

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LTC3826-1  
30µA I , Dual, 2-Phase  
Q
Synchronous Step-Down Controller  
FEATURES  
DESCRIPTION  
The LTC®3826-1 is a high performance dual step-down  
switching regulator controller that drives all N-channel  
synchronouspowerMOSFETstages.Aconstantfrequency  
current mode architecture allows a phase-lockable fre-  
quency of up to 650kHz. Power loss and noise due to the  
ESRoftheinputcapacitorESRareminimizedbyoperating  
the two controller output stages out of phase.  
n
Wide Output Voltage Range: 0.8V ≤ V  
≤ 10V  
OUT  
n
Low Operating I : 30μA (One Channel On)  
Q
n
Out-of-Phase Controllers Reduce Required Input  
Capacitance and Power Supply Induced Noise  
OPTI-LOOP® Compensation Minimizes C  
n
n
n
n
n
OUT  
1ꢀ Output Voltage Accuracy  
Wide V Range: 4V to 36V Operation  
IN  
Phase-Lockable Fixed Frequency 140kHz to 650kHz  
Selectable Continuous, Pulse Skipping or Low Ripple  
Burst Mode® Operation at Light Loads  
Dual N-Channel MOSFET Synchronous Drive  
Very Low Dropout Operation: 99% Duty Cycle  
Adjustable Output Voltage Soft-Start or Tracking  
Output Current Foldback Limiting  
The 30μA no-load quiescent current extends operating  
life in battery powered systems. OPTI-LOOP compensa-  
tion allows the transient response to be optimized over  
a wide range of output capacitance and ESR values. The  
LTC3826-1featuresaprecision0.8Vreferenceandapower  
goodoutputindicator. Awide4Vto36Vinputsupplyrange  
encompasses all battery chemistries.  
n
n
n
n
n
n
n
n
n
Power Good Output Voltage Monitor  
Independent TRACK/SS pins for each controller ramp the  
output voltage during start-up. Current foldback limits  
MOSFET heat dissipation during short-circuit conditions.  
Output Overvoltage Protection  
Low Shutdown I : 4μA  
Q
Internal LDO Powers Gate Drive from V or V  
IN  
OUT  
The PLLIN/MODE pin selects among Burst Mode opera-  
tion, pulse skipping mode, or continuous inductor cur-  
rent mode at light loads. For a leadless package version  
(5mm × 5mm QFN) with additional features, see the  
LTC3826 data sheet.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode and OPTI-LOOP are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents  
including 5481178, 5929620, 6177787, 6144194, 5408150, 6580258, 6304066, 5705919.  
Small 28-Lead SSOP Package  
APPLICATIONS  
n
Automotive Systems  
n
Battery-Operated Digital Devices  
n
Distributed DC Power Systems  
TYPICAL APPLICATION  
High Efficiency Dual 8.5V/3.3V Step-Down Converter  
V
Efficiency and Power Loss  
IN  
4V TO 36V  
vs Load Current  
22μF  
4.7μF  
50V  
100  
90  
10000  
1000  
100  
10  
V
INTV  
CC  
IN  
TG1  
TG2  
0.1μF  
BOOST1  
SW1  
BOOST2  
SW2  
80  
7.2μH  
3.3μH  
0.1μF  
70  
BG1  
BG2  
60  
50  
LTC3826-1  
PGND  
+
40  
30  
20  
10  
0
+
SENSE1  
SENSE1  
SENSE2  
0.015Ω  
192.5k  
0.015Ω  
1
–
–
SENSE2  
V
V
8.5V  
3.5A  
OUT1  
3.3V  
5A  
OUT2  
V
FB1  
V
FB2  
FIGURE 13 CIRCUIT  
62.5k  
0.1  
I
I
TH2  
TH1  
TRACK/SS1 SGND TRACK/SS2  
0.1μF  
0.00001 0.0001 0.001 0.01  
0.1  
1
10  
220pF  
15k  
220pF  
15k  
150μF  
150μF  
20k  
OUTPUT CURRENT (A)  
20k  
38261 TA01b  
0.1μF  
38261 TA01  
38261fb  
1
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