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Datasheet> 器件分类 > 电源/电源管理> 电源电路> LTC3521IFE#PBF
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LTC3521IFE#PBF

产品描述IC REG BUCK BST ADJ TRPL 20TSSOP
产品类别电源/电源管理    电源电路   
文件大小367KB，共22页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
标准
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LTC3521IFE#PBF概述

IC REG BUCK BST ADJ TRPL 20TSSOP

LTC3521IFE#PBF规格参数

参数名称属性值
Brand NameLinear Technology
是否Rohs认证符合
厂商名称Linear ( ADI )
零件包装代码TSSOP
包装说明HTSSOP,
针数20
制造商包装代码FE
Reach Compliance Codecompliant
ECCN代码EAR99
Samacsys DescriptionSwitching Voltage Regulators 1A Buck-Boost and Dual 600mA Buck Synchronous DC/DC Converters
其他特性ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE
模拟集成电路 - 其他类型SWITCHING REGULATOR
控制模式VOLTAGE-MODE
控制技术PULSE WIDTH MODULATION
最大输入电压5.5 V
最小输入电压1.8 V
标称输入电压3.6 V
JESD-30 代码R-PDSO-G20
JESD-609代码e3
长度6.5 mm
功能数量1
端子数量20
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HTSSOP
封装形状RECTANGULAR
封装形式SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）NOT SPECIFIED
认证状态Not Qualified
座面最大高度1.2 mm
表面贴装YES
切换器配置BUCK-BOOST
最大切换频率1350 kHz
技术CMOS
温度等级AUTOMOTIVE
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NOT SPECIFIED
宽度4.4 mm

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LTC3521
1A Buck-Boost DC/DC
and Dual 600mA Buck
DC/DC Converters
FeaTures
n
DescripTion
The
LTC
®
3521
combines a 1A buck-boost DC/DC converter
and dual 600mA synchronous buck DC/DC converters. The
1.1MHz switching frequency minimizes the solution foot-
print while maintaining high efficiency. All three converters
feature soft-start and internal compensation to minimize
the solution footprint and simplify the design process.
The buck converters are current mode controlled and
utilize an internal synchronous rectifier to improve ef-
ficiency. The buck converters support 100% duty cycle
operation to extend battery life. If the PWM pin is held
low, the buck converters automatically transition from
Burst Mode operation to PWM mode at high loads. With
the PWM pin held high, the buck converters remain in low
noise, 1.1MHz PWM mode.
The buck-boost converter features continuous conduction
operation to maximize efficiency and minimize noise. At
light loads, the buck-boost converter can be operated in
Burst Mode operation to improve efficiency and reduce
no-load standby current.
The LTC3521 provides a <2μA shutdown mode, over-
temperature shutdown and current limit protection
on all converters. The LTC3521 is available in a 24-pin
0.75mm × 4mm × 4mm QFN package, and a 20-pin ther-
mally enhanced TSSOP package.
n
n
n
n
n
n
n
n
Three High Efficiency DC/DC Converters:
Buck-Boost (V
OUT
: 1.8V to 5.25V, I
OUT
: 1A)
Dual Buck (V
OUT
: 0.6V to V
IN
, I
OUT
: 600mA)
1.8V to 5.5V Input Voltage Range
Pin-Selectable Burst Mode
®
Operation
30µA Total Quiescent Current in Burst Mode
Operation
Independent Power Good Indicator Outputs
Integrated Soft-Start
Thermal and Overcurrent Protection
<2µA Current in Shutdown
Small 4mm × 4mm QFN and Thermally Enhanced
TSSOP Packages
applicaTions
n
n
n
n
n
Bar Code Readers
Medical Instruments
Handy Terminals
PDAs, Handheld PCs
GPS Receivers
L,
LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U. S. Patents, including 6404251, 6166527.
Typical applicaTion
V
IN
2.4V TO 4.2V
+
Li-Ion
4.7µF
4.7µH
PV
IN1
V
IN
PV
IN2
SW2
SW1A
SW1B
V
OUT1
FB2
LTC3521
4.7µH
137k
68.1k
4.7µH
100k
100k
EFFICIENCY (%)
V
OUT1
3.3V
800mA
(1A, V
IN
> 3.0V)
V
OUT2
1.8V
10µF 600mA
22µF
1.0M
221k
ON
OFF
BURST
PWM
FB1
SW3
SHDN1
FB3
SHDN2
SHDN3
PGOOD1
PWM
PGOOD2
PGND1A
PGOOD3
PGND1B GND PGND2
V
OUT3
1.2V
10µF 600mA
3521 TA01a
100
98
96
94
92
90
88
86
84
82
80
78
76
74
72
70
2.4
Efficiency vs V
IN
V
OUT1
= 3.3V
I
OUT
= 500mA
V
OUT2
= 1.8V
I
OUT
= 200mA
V
OUT3
= 1.2V
I
OUT
= 200mA
3.4
V
IN
(V)
4.4
5.4
3521 TA01b
3521fb
For more information
www.linear.com/LTC3521
1

LTC3521IFE#PBF相似产品对比

LTC3521IFE#PBF LTC3521EFE#TRPBF LTC3521EFE#PBF LTC3521EUF#TRPBF LTC3521EUF#PBF LTC3521IUF#TRPBF LTC3521IFE#TRPBF LTC3521IUF#PBF
描述 IC REG BUCK BST ADJ TRPL 20TSSOP IC REG BUCK BST ADJ TRPL 20TSSOP IC REG BUCK BST ADJ TRPL 20TSSOP IC REG BUCK BOOST ADJ TRPL 24QFN IC REG BUCK BOOST ADJ TRPL 24QFN IC REG BUCK BOOST ADJ TRPL 24QFN IC REG BUCK BST ADJ TRPL 20TSSOP 可输出电流：600mA, 1A 开关工作频率：1.1MHz 输出类型：Adjustable 输出电压的路数：3 功能类型：Step-Down, Step-Up/Step-Down 输出配置：Positive 1A 降压-升压型 DC/DC 和双通道 600mA 降压型 DC/DC 转换器
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
是否Rohs认证 符合 符合 符合 符合 符合 符合 符合 符合
厂商名称 Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
零件包装代码 TSSOP TSSOP TSSOP QFN QFN QFN TSSOP QFN
包装说明 HTSSOP, HTSSOP, TSSOP20,.25 HTSSOP, TSSOP20,.25 HVQCCN, LCC24,.16SQ,20 HVQCCN, LCC24,.16SQ,20 HVQCCN, HTSSOP, HVQCCN,
针数 20 20 20 24 24 24 20 24
制造商包装代码 FE FE FE UF UF UF FE UF
Reach Compliance Code compliant compliant compliant compliant compliant compliant compliant compliant
ECCN代码 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
其他特性 ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE
模拟集成电路 - 其他类型 SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
控制模式 VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE
控制技术 PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
最大输入电压 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
最小输入电压 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V 1.8 V
标称输入电压 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V
JESD-30 代码 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 S-PQCC-N24 S-PQCC-N24 S-PQCC-N24 R-PDSO-G20 S-PQCC-N24
JESD-609代码 e3 e3 e3 e3 e3 e3 e3 e3
长度 6.5 mm 6.5 mm 6.5 mm 4 mm 4 mm 4 mm 6.5 mm 4 mm
功能数量 1 1 1 1 1 1 1 1
端子数量 20 20 20 24 24 24 20 24
最高工作温度 125 °C 85 °C 85 °C 85 °C 85 °C 125 °C 125 °C 125 °C
封装主体材料 PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
封装代码 HTSSOP HTSSOP HTSSOP HVQCCN HVQCCN HVQCCN HTSSOP HVQCCN
封装形状 RECTANGULAR RECTANGULAR RECTANGULAR SQUARE SQUARE SQUARE RECTANGULAR SQUARE
封装形式 SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度） NOT SPECIFIED NOT SPECIFIED 225 NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
认证状态 Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
座面最大高度 1.2 mm 1.2 mm 1.2 mm 0.8 mm 0.8 mm 0.8 mm 1.2 mm 0.8 mm
表面贴装 YES YES YES YES YES YES YES YES
切换器配置 BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST BUCK-BOOST
最大切换频率 1350 kHz 1350 kHz 1350 kHz 1350 kHz 1350 kHz 1350 kHz 1350 kHz 1350 kHz
技术 CMOS CMOS CMOS CMOS CMOS CMOS CMOS CMOS
温度等级 AUTOMOTIVE OTHER OTHER OTHER OTHER AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
端子面层 Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
端子形式 GULL WING GULL WING GULL WING NO LEAD NO LEAD NO LEAD GULL WING NO LEAD
端子节距 0.65 mm 0.65 mm 0.65 mm 0.5 mm 0.5 mm 0.5 mm 0.65 mm 0.5 mm
端子位置 DUAL DUAL DUAL QUAD QUAD QUAD DUAL QUAD
处于峰值回流温度下的最长时间 NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
宽度 4.4 mm 4.4 mm 4.4 mm 4 mm 4 mm 4 mm 4.4 mm 4 mm

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