參數(shù)資料
型號(hào): LTC1473LCGN
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 電源管理
英文描述: Dual Low Voltage PowerPathTM Switch Driver
中文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝: 0.150 INCH, PLASTIC, SSOP-16
文件頁(yè)數(shù): 1/16頁(yè)
文件大?。?/td> 211K
代理商: LTC1473LCGN
LTC 1473L
1
The LTC
1473L provides reliable and efficient switching
between two DC power sources. This device drives two
external sets of back-to-back N-channel MOSFET switches
to route power to the input of a low voltage system. An
internal boost regulator provides the voltage to fully en-
hance the logic-level N-channel MOSFET switches while
an internal undervoltage lock-out circuit keeps the system
alive down to 2.8V.
The LTC1473L senses current to limit inrush between the
batteries and the system supply capacitor during switch-
over transitions or during fault conditions. A user-pro-
grammable timer monitors the time the MOSFET switches
are in current limit and latches them off when the pro-
grammed time is exceeded.
A unique “2-diode” logic mode ensures system start-up
regardless of which input receives power first.
I
Portable Computers
I
Portable Instruments
I
Fault Tolerant Computers
I
Battery-Backup Systems
I
3.3V/5V Power Management
, LTC and LT are registered trademarks of Linear Technology Corporation.
PowerPath is a trademark of Linear Technology Corporation.
I
Power Path Management for Systems
with Multiple DC Sources
I
Switches and Isolates Sources from 3.3V to 10V
I
All N-Channel Switching to Reduce Power Losses
and System Cost
I
Built-In Step-Up Regulator for N-Channel Gate Drive
I
Capacitor Inrush and Short-Circuit Current Limited
I
User-Programmable Timer Prevents Overdissipation
During Current Limiting
I
Undervoltage Lockout Prevents Operation with Low
Inputs
I
Small Footprint: 16-Pin Narrow SSOP
Dual Low Voltage
PowerPath
TM
Switch Driver
3.3V to 4-Cell NiMH Backup Switch
IN1
IN2
DIODE
TIMER
V
+
V
GG
SW
GND
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
GA1
SAB1
GB1
SENSE
+
SENSE
GA2
SAB2
GB2
LTC1473L
C
OUT
R
0.04
1
μ
F
1mH*
Si9926DY
BAT54C
1473 TA01
DCIN
3.3V
V
BAT1
4
×
NiMH
LOGIC
DRIVEN
3.3V OR
V
BAT1
C
TIMER
2000pF
Si9926DY
1
μ
F
+
* COILCRAFT 1812LS-105XKBC
APPLICATIOU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
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參數(shù)描述
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