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| 型号： | LTC3417AEDHC-1#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 16DFN |
| 标准包装： | 73 |
| 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 ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-DFN（5x3） |
LTC3417A-1
Dual Synchronous
1.5A/1A 4MHz Step-Down
DC/DC Regulator with POR
FEATURES
DESCRIPTION
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High Ef?ciency: Up to 95%
1.5A/1A Guaranteed Minimum Output Current
Synchronizable to External Clock
Power-On-Reset Output
No Schottky Diodes Required
Programmable Frequency Operation: 1.5MHz or
Adjustable From 0.6MHz to 4MHz
Low Ripple (< 35mV P-P ) BurstMode ? Operation
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
125μA Quiescent Current in Sleep Mode
Ultralow Shutdown Current: I Q < 1μA
Low Dropout Operation: 100% Duty Cycle
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-1 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.
The open drain POR pin goes low when either output
voltage falls 6% below regulation. The output will remain
low 150ms longer than the duration of the out of regula-
tion condition.
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.
(3mm × 5mm) DFN and 20-Lead TSSOP Packages
APPLICATIONS
n GPS/Navigation Systems
n Automotive Instrumentation
n PC Cards
n Industrial Power Supplies
n General Purpose Point of Load DC/DC
TYPICAL APPLICATION
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)
and both channels draw a total quiescent current of only
100μA. In shutdown, the device draws <1μA.
L , LT, LTC and LTM 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, 6580258, 6304066, 6127815, 6498466, 6611131, 6144194.
OUT2 Ef?ciency
(Burst Mode Operation)
V IN
2.5V TO 5.5V
100
REFER TO FIGURE 4
10
V OUT1
1.8V
1.5A
10 μ F
1.5μH
22pF
V IN
511k
V IN
POR
FREQ
SW1 SW2
RUN1 RUN2
LTC3417A-1
V FB1 V FB2
100k
2.2μH
V IN
RESET
22pF
866k
V OUT2
2.5V
1A
95
90
85
80
EFFICIENCY
POWER LOSS
1
0.1
0.01
47 μ F
412k
5.9k
I TH1
GND
I TH2
412k
2.87k
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
3417A-1 TA01
LOAD CURRENT (A)
3417A-1 TA01a
3417a1fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3417AEDHC-1-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 with POR |
| LTC3417AEDHC-2#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:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC3417AEDHC-2#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 |
| LTC3417AEDHC-2-PBF | 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 |
| LTC3417AEDHC-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 |
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