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参数资料
| 型号： | LTC3419IMS#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.2 A DUAL SWITCHING CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件页数： | 1/16页 |
| 文件大小： | 266K |
| 代理商： | LTC3419IMS#PBF |
LTC3419
1
3419fa
OUTPUT CURRENT (mA)
EFFICIENCY
(%)
100
90
80
70
60
50
40
30
20
10
0
POWER
LOSS
(W)
10
1
0.1
0.01
0.001
0.0001
0.1
10
100
1000
3419 TA01b
1
VOUT = 1.2V
VOUT = 1.8V
VOUT = 2.5V
VIN = 3.6V
n Cellular Telephones
n Digital Still Cameras
n Wireless and DSL Modems
n Portable Media Players
n PDAs/Palmtop PCs
FEATURES
APPLICATIONS
DESCRIPTION
Dual Monolithic 600mA
Synchronous Step-Down
Regulator
The LTC3419 is a dual, 2.25MHz, constant-frequency,
synchronous step-down DC/DC converter in a tiny
3mm
× 3mm DFN package. 100% duty cycle provides
low dropout operation, extending battery life in portable
systems. Low output voltages are supported with the 0.6V
feedback reference voltage. Each regulator can supply
600mA output current.
The input voltage range is 2.5V to 5.5V, making it ideal
for Li-Ion and USB powered applications. Supply current
during operation is only 35μA and drops to <1μA in
shutdown. A user-selectable mode input allows the user
to trade off between high efciency Burst Mode operation
and pulse-skipping mode.
An internally set 2.25MHz switching frequency allows the
use of tiny surface mount inductors and capacitors. Internal
soft-start reduces inrush current during start-up. Both
outputs are internally compensated to work with ceramic
output capacitors. The LTC3419 is available in a low prole
(0.75mm) 3mm
×3mmDFNpackage.TheLTC3419isalso
available in a xed output voltage conguration selected
via internal resistor dividers (see Table 2).
Dual Monolithic Buck Regulator in 8-Lead 3
× 3 DFN
n High Efciency Dual Step-Down Outputs: Up to 96%
n 600mA Current per Channel at VIN = 3V
n Only 35μA Quiescent Current During Operation
(Both Channels)
n 2.25MHz Constant-Frequency Operation
n 2.5V to 5.5V Input Voltage Range
n Low Dropout Operation: 100% Duty Cycle
n No Schottky Diodes Required
n Internally Compensated for All Ceramic Capacitors
n Independent Internal Soft-Start for Each Channel
n Available in Fixed Output Versions
n Current Mode Operation for Excellent Line and Load
Transient Response
n 0.6V Reference Allows Low Output Voltages
n User-Selectable Burst Mode Operation
n Short-Circuit Protected
n Ultralow Shutdown Current: IQ < 1μA
n Available in Small MSOP or 3mm
× 3mm DFN-8
Packages
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5481178, 6127815, 6304066, 6498466, 6580258, 6611131.
Efciency and Power Loss
vs Output Current
VIN
RUN2
RUN1
LTC3419
VFB2
SW2
SW1
MODE
VFB1
22pF
GND
VIN
2.5V TO 5.5V
VOUT2
1.8V AT
600mA
VOUT1
2.5V AT
600mA
3419 TA01
118k
187k
59k
3.3μH3.3μH
10μF
TYPICAL APPLICATION
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| LTC3421 | 制造商:LINER 制造商全称:Linear Technology 功能描述:3A, 3MHz Micropower Synchronous Boost Converter with Output Disconnect |
| LTC3421EUF | 功能描述:IC REG BOOST SYNC ADJ 1.5A 24QFN RoHS:否 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 |
| LTC3421EUF#PBF | 功能描述:IC REG BOOST SYNC ADJ 1.5A 24QFN 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 |
| LTC3421EUF#TR | 功能描述:IC REG BOOST SYNC ADJ 1.5A 24QFN RoHS:否 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 |
| LTC3421EUF#TRPBF | 功能描述:IC REG BOOST SYNC ADJ 1.5A 24QFN 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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