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LTC3520IUF#PBF

更新时间： 2024-10-01 19:52:07
品牌 Logo 应用领域
凌特 - Linear 开关输出元件
页数 文件大小 规格书
24页 312K
描述
LTC3520 - Synchronous 1A Buck-Boost and 600mA Buck Converters; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

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LTC3520IUF#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16其他特性：IT ALSO OPRATES IN VOLTAGE MODE; ALSO ADJUSTABLE OUTPUT FROM 2.2V TO 5.25V
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：5.5 V
最小输入电压：2.2 V标称输入电压：3.6 V
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：1200 kHz
技术：CMOS温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：4 mm
Base Number Matches：1

LTC3520IUF#PBF 数据手册

 浏览型号LTC3520IUF#PBF的Datasheet PDF文件第2页浏览型号LTC3520IUF#PBF的Datasheet PDF文件第3页浏览型号LTC3520IUF#PBF的Datasheet PDF文件第4页浏览型号LTC3520IUF#PBF的Datasheet PDF文件第5页浏览型号LTC3520IUF#PBF的Datasheet PDF文件第6页浏览型号LTC3520IUF#PBF的Datasheet PDF文件第7页 
LTC3520  
Synchronous 1A  
Buck-Boost and 600mA  
Buck Converters  
FEATURES  
DESCRIPTION  
The LTC®3520 combines 1A buck-boost and 600mA  
synchronous buck DC/DC converters in a tiny 4mm ×  
4mm package. A programmable switching frequency  
allows the efficiency to be optimized while minimizing  
the solution footprint. Both converters feature soft-start  
and current limit protection. The uncommitted gain block  
can be configured as an LDO or utilized as a battery-good  
comparator.  
n
Dual High Efficiency DC/DC Converters:  
Buck-Boost (V : 2.2V to 5.25V, I  
= 1A at  
OUT  
IN  
OUT  
V
= 3.3V, V ≥ 3V)  
OUT  
Buck (V : 0.8V to V , I  
= 600mA)  
OUT  
IN OUT  
n
n
n
2.2V to 5.5V Input Voltage Range  
Pin-Selectable Burst Mode® Operation  
Uncommitted Gain Block for LDO Controller, Battery  
Good Indication or Sequencing  
n
n
Programmable 100kHz to 2MHz Switching Frequency  
55μA Total Quiescent Current for Both Converters in  
Burst Mode Operation  
Thermal and Overcurrent Protection  
<1μA Quiescent Current in Shutdown  
24-Lead 4mm × 4mm QFN Package  
Thebuckconverteriscurrentmodecontrolledwithinternal  
synchronousrectificationtoimproveefficiency.Pin-select-  
ableBurstModeoperationcanbeenabledtoimprovelight  
load efficiency, or the buck converter can be operated in  
low noise PWM mode for sensitive applications.  
n
n
n
The buck-boost converter provides continuous conduc-  
tion operation to maximize efficiency and minimize noise.  
At light loads, use of Burst Mode operation will improve  
efficiency.  
APPLICATIONS  
n
Portable Media Players  
n
Digital Cameras  
The LTC3520 provides a <1μA shutdown mode and over-  
temperature shutdown on both converters. The LTC3520  
is available in a low profile (0.75mm) 24-lead 4mm ×  
4mm QFN package.  
n
Handheld PCs, PDAs  
GPS Receivers  
n
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners. Protected by U.S. Patents, including 5481178, 6166527, 6304066, 6404251, 6580258.  
TYPICAL APPLICATION  
3.3V at 500mA, 1.8V at 600mA and 1.5V at 200mA Converter  
Efficiency vs VIN  
100  
V
IN  
4.7μH  
BUCK-BOOST  
2.2V TO  
5.5V  
22μF  
PV  
PV  
PV SV SW1A  
IN3 IN  
I
= 150mA  
IN1  
IN2  
OUT  
95  
90  
85  
80  
75  
70  
V
3.3V  
500mA  
1A FOR  
V
4.7μH  
27pF  
OUT1  
SW1B  
V
OUT2  
1.8V  
600mA  
SW2  
V
OUT1  
470pF  
BUCK  
OUT  
255k  
56pF  
10k  
10μF  
47μF  
I
= 250mA  
V
C1  
≥ 3V  
1M  
IN  
FB2  
SS2  
15k  
0.01μF  
200k  
FB1  
SS1  
0.01μF  
309k  
LTC3520  
54.9k  
R
T
V
OUT2  
PWM1  
PWM2  
SD3  
A
OUT  
V
BURST  
PWM  
OUT  
1.5V  
200mA  
33pF  
100k  
110k  
SD2  
OFF ON  
4.7μF  
2.7  
3.2  
4.2  
(V)  
4.7  
5.2  
2.2  
3.7  
SD1  
A
IN  
V
IN  
PGND1 SGND PGND2  
3520 TA01b  
3520 TA01  
3520fa  
1
1234567...24

中文翻译

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