- 您现在的位置：买卖IC网 > PDF目录383291 > LTC3456 (Linear Technology Corporation) 2-Cell, Multi-Output DC/DC Converter with USB Power Manager PDF资料下载
参数资料
| 型号： | LTC3456 |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 2-Cell, Multi-Output DC/DC Converter with USB Power Manager |
| 中文描述： | 2节电池，多输出DC / DC转换器与USB电源管理器 |
| 文件页数： | 1/28页 |
| 文件大小： | 358K |
| 代理商： | LTC3456 |
当前第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
1
LTC3456
3456f
2-Cell, Multi-Output
DC/DC Converter with
USB Power Manager
■
Seamless Transition Between 2-Cell Battery, USB
and AC Wall Adapter Input Power Sources
■
Main Output: Fixed 3.3V Output
■
Core Output: Adjustable from 0.8V to V
BATT(MIN)
■
Hot Swap
TM
Output for Memory Cards
■
All Outputs Discharged to Ground During Shutdown
■
Power Supply Sequencing:
Main and Hot Swap
Outputs Come Up After Core Output
■
Accurate USB Current Limiting
■
High Frequency Operation: 1MHz
■
High Efficiency: Up to 92%
■
Small (4mm
×
4mm
×
0.75mm) 24-Pin QFN Package
APPLICATIU
■
GPS Portable Navigators
■
MP3 Players
■
Digital Cameras
■
Handheld Computers
DESCRIPTIOU
The LTC
3456 is a complete power management system
IC optimized for a variety of portable applications. The
device generates two separate power rails: a 3.3V (fixed)
Main supply and a 1.8V (adjustable) Core supply. In
addition, the LTC3456 contains a USB power manager, a
Hot Swap output, a low-battery indicator and an always-
alive V
MAX
output. The LTC3456 takes power from one of
three sources: a Wall adapter, a USB port or a 2-cell
Alkaline/NiCd/NiMH battery, in that order of priority. Cur-
rent drawn from the USB port is accurately limited to
100mA or 500mA based on the state of the USBHP pin.
The Main and Core switchers are all high efficiency, 1MHz
fixed frequency PWM converters. Availability in a small
(4mm
×
4mm
×
0.75mm) 24-pin QFN package makes the
LTC3456 ideal for space-sensitive portable devices.
FEATURES
TYPICAL APPLICATIO
U
+
WALLFB
PWRKEY
PBSTAT RESET MODE
V
MAX
V
EXT
10
μ
F
4.7
μ
F
4.7
μ
F
1k
11.3k
1
4.7
μ
F
1
AC WALL
ADAPTER
(5V
±
10%)
USB POWER
(4.35V TO 5.5V)
USB
CONTROLLER
4.32k
80.6k
100k
L2
4.7
μ
H
2 AA
CELLS
L3
10
μ
H
EXT_PWR
USB
SUSPEND
USBHP
AO
AIN
V
MAIN
V
BATT
V
INT
SW2_BST
LTC3456
SW2_BK
μ
P
PWRON PGND AGND
22
μ
F
V
3.3V
MAIN OUTPUT
3.3V
150mA
1
μ
F
HSO
Hot Swap OUTPUT
3.3V
50mA
1
μ
F
1
μ
F
3456 TA01
SW1
FB1
L1
10
μ
H
CORE OUTPUT
1.8V
200mA
V
(POWERS
REAL-TIME CLOCK)
10
μ
F
220pF
100k
80.6k
LOAD CURRENT (mA)
1
40
E
P
50
60
70
80
10
100
1000
3456 TA01b
30
20
10
0
90
100
100
150
200
50
0
250
V
= 2.4V
MODE = 0V
EFFICIENCY
POWER LOSS
1.8V
OUTPUT
1.8V
OUTPUT
3.3V
OUTPUT
3.3V
OUTPUT
Efficiency and Power Loss
vs Load Current
(Battery Powered)
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3456EUF | ECONOLINE: RSZ/P - 1kVDC |
| LTC3828EG | Dual 2-Phase Step-Down Controller with Tracking |
| LTC3828EUH | Model HB Series Horizontal Stacking Banana Plug Patch Cord, Banana Plug Each End Operating Voltage 30VAC/60VDC Max, Current-15A Cont, Operating Temp Max +55 degrees C, Color-Red, Length-24" RoHS Compliant: Yes |
| LTC3828 | 16-Bit Bus Transceiver With 3-State Outputs 48-SSOP -40 to 85 |
| LTC486 | Quad Low Power RS485 Driver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3456EUF | 制造商:Linear Technology 功能描述:Power Management System 24-Pin QFN EP |
| LTC3456EUF#PBF | 功能描述:IC CONV DC/DC USB BATT 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC3456EUF#TRPBF | 功能描述:IC CONV DC/DC USB BATT 24-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC3458 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LTC3458EDE | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN 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 |
发布紧急采购，3分钟左右您将得到回复。