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參數(shù)資料
| 型號： | LTC3407-2 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator |
| 中文描述： | 雙同步，800mA電流，2.25MHz降壓直流/直流穩(wěn)壓器 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 516K |
| 代理商： | LTC3407-2 |
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 |
|---|---|
| LTC3407EDD-2 | Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3407EMSE-2 | Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3408 | 64 x 18 3.3-V asynchronous FIFO memory 56-SSOP 0 to 70 |
| LTC3408EDD | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| LTC3409 | 64 x 18 3.3-V asynchronous FIFO memory 56-SSOP 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3407-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous, 1.8V/0.8A and 3.3V/0.8A 2.25MHz Step-Down DC/DC Regulator |
| LTC3407-4 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3407A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator |
| LTC3407A-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator |
| LTC3407AB | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.25A, 4MHz, Synchronous Step-Down DC/DC Converter |
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