參數(shù)資料
型號： LTC3455
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
中文描述： 雙DC / DC轉(zhuǎn)換器的USB電源管理器和鋰離子電池充電器
文件頁數(shù)： 1/24頁
文件大?。?/td> 516K
代理商： LTC3455
LTC3455
1
3455f
APPLICATIU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
LOAD CURRENT (mA)
60
E
80
75
70
65
85
90
95
100
3455 TA01b
V
BAT
= 3.6V
1
SWITCHER 1
V
OUT1
= 1.8V
SWITCHER 2
V
OUT2
= 3.3V
10
100
1000
The LTC
3455 is a complete power management solution
for a variety of portable applications. The device contains
two synchronous step-down DC/DC converters, a USB
power controller, a full-featured Li-Ion battery charger, a
Hot Swap output, a low-battery indicator, and numerous
internal protection features. The LTC3455 provides a
small, simple solution for obtaining power from three
different power sources: a single-cell Li-Ion battery, a USB
port, and a wall adapter. Current drawn from the USB bus
is accurately limited under all conditions. Whenever a USB
or a wall adapter is present, the battery charger is enabled
and all internal power for the device is drawn from the
appropriate external power source. All outputs are dis-
charged to ground during shutdown to provide complete
output disconnect. The device is available in a
4mm
×
4mm 24-pin exposed-pad QFN package.
I
Handheld Computers
I
Digital Cameras
I
MP3 Players
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
*U.S. Patent 6,522,118
I
Seamless Transition between Input Power Sources:
Li-Ion Battery, USB, and 5V Wall Adapter
I
Accurate USB Current Limiting (500mA/100mA)
I
Two High Efficiency DC/DC Converters: Up to 96%
I
Thermal Regulation Maximizes Battery Charge
Rate without Risk of Overheating*
I
Full-Featured Li-Ion Battery Charger
I
Hot Swap Output for SDIO and Memory Cards
I
Pin-Selectable Burst Mode
Operation
I
Output Disconnect: All Outputs Discharged to
Ground During Shutdown
I
Available in a 4mm
×
4mm
×
0.8mm 24-Pin
QFN Package
Efficiency
11
10
13
14
1
1
μ
F
1
μ
F
10
μ
F
4.7
μ
F
WALL 5V
3.3V, HS
8
6
5
9
1
4.7
μ
F
USB 5V
4
2
3
18
12
249k
4.7
μ
H
80.6k
10pF
10
μ
F
3.3V
0.5A
1
7
100k
4.7
μ
H
80.6k
10pF
10
μ
F
1.8V
0.4A
16
17
LBO
V
BAT
2.49M
24
23
20
21
15
19
22
0.1
μ
F
1k
806k
1M
1.8V
1M
2.49k
1M
1.8V
25
3455 TA01a
μ
C
USB
CONTROLLER
SINGLE
CELL Li-ION
3.3V TO 4.2V
1.24k
3.32k
ON/OFF
+
WALLFB
HSI
HSO
V
MAX
USB
SUSPEND
USBHP
SW2
FB2
SW1
FB1
TIMER
PROG
AI
AO
V
BAT
ON
GND
CHRG
PBSTAT
RST
MODE
HSON
LTC3455
ON2
PWRON
Dual DC/DC Converter
with USB Power Manager
and Li-Ion Battery Charger
相關(guān)PDF資料
PDF描述
LTC3455EUF Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3440 Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3441 Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LT1616 Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3406A Standalone Linear Li-lon Battery Charger with Thermistor Input
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3455EUF 功能描述:IC CONV DC/DC DUAL USBBATT 24QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3455EUF#PBF 功能描述:IC CONV DC/DC DUAL USBBATT 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3455EUF#TR 功能描述:IC CONV DC/DC DUAL USBBATT 24QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3455EUF#TRPBF 功能描述:IC CONV DC/DC DUAL USBBATT 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
LTC3455EUF-1#PBF 功能描述:IC DC/DC CONV DUAL CHRG 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR
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