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參數(shù)資料
| 型號： | LTC3412 |
| 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： | LTC3412 |
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
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| LTC3412AEFE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 3A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
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