参数资料
型号: LTC3407EMSE#TR
厂商: Linear Technology
文件页数: 1/16页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1A 10MSOP
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.6 V ~ 5 V
输入电压: 2.5 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 1.5MHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°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
LTC3407
Dual Synchronous, 600mA,
1.5MHz Step-Down
DC/DC Regulator
FEATURES
DESCRIPTION
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High Ef?ciency: Up to 96%
Very Low Quiescent Current: Only 40μA
1.5MHz Constant Frequency Operation
High Switch Current: 1A on Each Channel
No Schottky Diodes Required
Low R DS(ON) Internal Switches: 0.35Ω
Current Mode Operation for Excellent Line
and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: I Q < 1μA
Output Voltages from 5V down to 0.6V
Power-On Reset Output
Externally Synchronizable Oscillator
Small Thermally Enhanced MSOP and 3mm × 3mm
The LTC ? 3407 is a dual, constant frequency, synchronous
step down DC/DC converter. Intended for low power ap-
plications, it operates from 2.5V to 5.5V input voltage
range and has a constant 1.5MHz switching frequency,
allowing the use of tiny, low cost capacitors and inductors
2mm or less in height. Each output voltage is adjustable
from 0.6V to 5V. Internal synchronous 0.35Ω, 1A power
switches provide high ef?ciency without the need for
external Schottky diodes.
A user selectable mode input is provided to allow the user
to trade-off ripple noise for low power ef?ciency. Burst
Mode ? operation provides high ef?ciency at light loads,
while pulse-skipping mode provides low ripple noise at
light loads.
DFN Packages
APPLICATIONS
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
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PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems
40μA. In shutdown, the device draws <1μA.
L , LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
V IN = 2.5V
LTC3407 Ef?ciency Curve
TO 5.5V
C1
R5
100
10 μ F
RUN2
V IN
RUN1
100k
95
2.5V
MODE/SYNC
POR
RESET
90
1.8V
V OUT2 = 2.5V
AT 600mA
C5, 22pF
L2
2.2 μ H
SW2
LTC3407
SW1
L1
2.2 μ H
C4, 22pF
V OUT1 = 1.8V
AT 600mA
85
80
75
C3
10 μ F
R4
887k
R3
280k
V FB2
GND
V FB1
R1
442k
R2
887k
C2
10 μ F
70
65
V IN = 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
60
1
10 100
1000
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
L1, L2: MURATA LQH32CN2R2M33
3407 TA01
LOAD CURRENT (mA)
3407 TA02
Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators
3407fa
1
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LTC3407IDD-2#TRPBF 功能描述:IC REG BUCK SYNC ADJ 1.2A 10DFN 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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