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参数资料
| 型号： | LTC3417AIFE-2#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 20TSSOP |
| 标准包装： | 74 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.5MHz，600kHz ~ 4MHz |
| 电流 - 输出： | 1A，1.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-TSSOP-EP |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3417A-2
Dual Synchronous
1.5A/1A 4MHz
Step-Down DC/DC Regulator
FEATURES
DESCRIPTION
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High Ef?ciency: Up to 95%
1.5A/1A Guaranteed Minimum Output Current
Synchronizable to External Clock
No Schottky Diodes Required
Programmable Frequency Operation: 1.5MHz or
Adjustable From 0.6MHz to 4MHz
Low Ripple (<35mV P-P ) BurstMode ? Operation
I Q : 125μA in Sleep
Low R DS(ON) Internal Switches
Short-Circuit Protected
V IN : 2.25V to 5.5V
Current Mode Operation for Excellent Line and Load
Transient Response
Ultralow Shutdown Current: I Q < 1μA
Low Dropout Operation: 100% Duty Cycle
Power Good Ouput
Phase Pin Selects 2nd Channel Phase Relationship
with Respect to 1st Channel
Internal Soft-Start with Individual Run Pin Control
Available in Small Thermally Enhanced
The LTC ? 3417A-2 is a dual constant frequency, synchro-
nous step-down DC/DC converter. Intended for medium
power applications, it operates from a 2.25V to 5.5V input
voltage range and has a constant programmable switching
frequency, allowing the use of tiny, low cost capacitors
and inductors 2mm or less in height. Each output voltage
is adjustable from 0.8V to 5V. Internal synchronous, low
R DS(ON) power switches provide high ef?ciency without
the need for external Schottky diodes.
A user selectable mode input allows the user to trade
off ripple voltage for light load ef?ciency. Burst Mode
operation provides high ef?ciency at light loads, while
Pulse Skip mode provides low ripple noise at light loads.
A phase mode pin allows the second channel to operate
in-phase or 180° out-of-phase with respect to channel 1.
Out-of-phase operation produces lower RMS current on
V IN and thus lower stress on the input capacitor.
To further maximize battery life, the P-channel MOSFETs
are turned on continuously in dropout (100% duty cycle)
(5mm × 3mm) DFN and 20-Lead TSSOP Packages
APPLICATIONS
and both channels draw a total quiescent current of only
100μA. In shutdown, the device draws <1μA.
L , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
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GPS/Navigation Systems
Automotive Instrumentation
PC Cards
Industrial Power Supplies
General Purpose Point of Load DC/DC
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 6144194.
TYPICAL APPLICATION
V OUT2 Ef?ciency
(Burst Mode Operation)
V IN
2.5V TO 5.5V
100
REFER TO FIGURE 4
10
10μF
V IN
95
EFFICIENCY
1
V OUT1
1.8V
1.5A
22pF
1.5μH
V IN
FREQ
SW1
RUN1
SW2
RUN2
2.2μH
V IN
22pF
V OUT2
2.5V
1A
90
85
0.1
511k
V FB1
LTC3417A-2
V FB2
866k
80
POWER LOSS
0.01
47μF
412k
5.9k
I TH1
GND
I TH2
2.87k
412k
22μF
75
70
V IN = 3.6V
V OUT = 2.5V
FREQ = 1MHz
0.001
0.0001
2200pF
6800pF
0.001
0.01 0.1
1
LOAD CURRENT (A)
3417A-2 TA01
3417A-2 TA01a
3417a2fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3417AIFE-2-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
| LTC3417AIFEPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step-Down 5.5V TSSOP20EP |
| LTC3417EDHC | 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step Down 2.25V to 5.5V 16-Pin DFN EP |
| LTC3417EDHC#PBF | 功能描述:IC REG BUCK SYNC ADJ DL 16DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3417EDHC#TRPBF | 功能描述:IC REG BUCK SYNC ADJ DL 16DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
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