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LT3070IUFDTR

更新时间： 2024-09-15 05:43:31
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
24页 202K
描述
5A, Low Noise, Programmable Output, 85mV Dropout Linear Regulator

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LT3070IUFDTR 数据手册

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Electrical Specifications Subject to Change  
LT3070  
5A, Low Noise,  
Programmable Output,  
85mV Dropout  
Linear Regulator  
FEATURES  
DESCRIPTION  
The LT®3070 is a low voltage, UltraFast™ transient re-  
sponse linear regulator. The device supplies up to 5A of  
output current with a typical dropout voltage of 85mV.  
A 0.01μF reference bypass capacitor decreases output  
n
Output Current: 5A  
n
Dropout Voltage: 85mV Typical  
n
Digitally Programmable V : 0.8V to 1.8V  
OUT  
n
Digital Output Margining: 1ꢀ, ꢁꢀ or 5ꢀ  
n
Low Output Noise: 25μV  
(10Hz to 100kHz)  
voltage noise to 25μV  
. The LT3070’s high bandwidth  
RMS  
RMS  
n
n
n
n
Parallelable: Use Two for a 10A Output  
Precision Current Limit: 10ꢀ  
permits the use of low ESR ceramic capacitors, saving  
bulk capacitance and cost. The LT3070’s features make  
it ideal for high performance FPGAs, microprocessors or  
sensitive communication supply applications.  
1ꢀ Accuracy Over Line, Load and Temperature  
Stable with Low ESR Ceramic Output Capacitors  
(15μF Minimum)  
High Freꢁuency PSRR: 35dB at 1MHz  
Enable Function Turns Output On/Off  
VIOC Pin Controls Buck Converter to Maintain Low  
Power Dissipation and Optimize Efficiency  
PWRGD/UVLO Flag  
Output voltage is digitally selectable in 50mV increments  
over a 0.8V to 1.8V range. A margining function allows the  
user to tolerance system output voltage in increments of  
1ꢀ, 3ꢀ or 5ꢀ. The IC incorporates a uniꢁue tracking  
functiontocontrolabuckregulatorpoweringtheLT3070’s  
input. This tracking function drives the buck regulator to  
n
n
n
n
n
n
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Current Limit Foldback Protection  
Thermal Shutdown  
maintain the LT3070’s input voltage to V  
minimizing power dissipation.  
+ 300mV,  
OUT  
28-Lead (4mm × 5mm) QFN Package  
InternalprotectionincludesUVLO,reverse-currentprotec-  
tion, precision current limiting with power foldback and  
thermal shutdown. The LT3070 regulator is available in a  
thermally enhanced 28-lead, 4mm × 5mm QFN package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. UltraFast is a trade mark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
APPLICATIONS  
n
FPGA and DSP Supplies  
n
ASIC and Microprocessor Supplies  
n
Servers and Storage Devices  
n
Post Buck Regulation and Supply Isolation  
TYPICAL APPLICATION  
0.9V, 5A Regulator  
50k  
Dropout Voltage  
V
BIAS  
2.2V TO 3.6V  
PWRGD  
4
2.2μF  
BIAS  
V
IN  
1.2V  
3
IN  
EN  
V
PWRGD  
SENSE  
330μF  
V
0.9V  
5A  
OUT  
LT3070  
OUT  
O0  
2
2.2μF  
4.7μF  
10μF  
PLACE HOLDER  
V
O1  
V
O2  
MARGSEL  
MARGTOL  
VIOC  
1
0
REF/BYP  
GND  
1nF  
0.01μF  
3070 TA01a  
0
20  
30  
40  
10  
XXX  
LTXXXX • TPCXX  
3070p  
1
1234567...24

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