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LTC1530I

更新时间： 2024-09-24 22:57:35
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
24页 291K
描述
High Power Synchronous Switching Regulator Controller

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中文翻译

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LTC1530I 数据手册

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LTC1530  
High Power Synchronous  
Switching Regulator Controller  
U
FEATURES  
DESCRIPTIO  
The LTC®1530 is a high power synchronous switching  
regulator controller optimized for 5V to 1.3V-3.5V output  
applications.Itssynchronousswitchingarchitecturedrives  
two external N-channel MOSFET devices to provide high  
efficiency. The LTC1530 contains a precision trimmed  
reference and feedback system that provides worst-case  
output voltage regulation of ±2% over temperature, load  
current and line voltage shifts. Current limit circuitry  
senses the output current through the on-resistance of  
the topside N-channel MOSFET, providing an adjustable  
current limit without requiring an external low value sense  
resistor.  
■
High Power Buck Converter from 5V or 3.3V  
Main Power  
■
Adjustable Current Limit in S0-8 with  
Topside FET RDS(ON) Sensing  
■
No External Sense Resistor Required  
■
Hiccup Mode Current Limit Protection  
■
Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output  
■
All N-Channel MOSFET Synchronous Driver  
■
Excellent Output Regulation: ±2% over Line, Load  
and Temperature Variations  
■
High Efficiency: Over 95% Possible  
■
Fast Transient Response  
■
Fixed 300kHz Frequency Operation  
The LTC1530 includes a fixed frequency PWM oscillator  
that free runs at 300kHz, providing greater than 90%  
efficiency in converter designs from 1A to 20A of output  
current. Shutdown mode drops the LTC1530 supply cur-  
rent to 45µA.  
■
Internal Soft-Start Circuit  
■
Quiescent Current: 1mA, 45µA in Shutdown  
U
APPLICATIO S  
Power Supply for Pentium® II, AMD-K6®-2, SPARC,  
■
The LTC1530 is specified for commercial and industrial  
temperature ranges and is available in the S0-8 package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Pentium is a registered trademark of Intel Corp.  
AMD-K6 is a registered trademark of Advanced Micro Devices, Inc.  
ALPHA and PA-RISC Microprocessors  
■
High Power 5V to 1.3V-3.5V Regulators  
U
TYPICAL APPLICATIO  
V
IN  
Efficiency vs Load Current  
5V  
100  
MBR0530T1 MBR0530T1  
90  
+
C
**  
IN  
0.1µF  
+
80  
70  
60  
50  
40  
30  
20  
10  
0
2.7k  
1200µF  
× 4  
10µF  
20Ω  
0.22µF  
†
L
O
PV  
I
Q1*  
Q2*  
G1  
CC  
MAX  
2µH  
V
3.3V  
14A  
OUT  
I
FB  
COMP  
††  
+
C
O
330µF  
× 7  
C1  
150pF  
R
C
10k  
LTC1530-3.3  
G2  
1530 F01a  
C
C
0.022µF  
V
OUT  
GND  
T
= 25°C  
A
†
COILTRONICS CTX02-13198  
OR PANASONIC ETQP6F2R5HA  
AVX TPSE337M006R0100  
* SILICONIX SUD50N03-10  
** SANYO 10MV1200GX  
COILTRONICS (561) 241-7876  
0
0.3  
2
4
6
8
10  
12  
14  
††  
LOAD CURRENT (A)  
1530 F01b  
Figure 1. Single 5V to 3.3V Supply  
1
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