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參數(shù)資料
| 型號： | SC1408IMS.TR |
| 廠商： | Semtech Corporation |
| 英文描述： | LOW VOLTAGE, BOOST DC-DC CONTROLLER |
| 中文描述： | 低電壓，升壓DC - DC控制器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 157K |
| 代理商： | SC1408IMS.TR |
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
LOW VOLTAGE, BOOST DC-DC
CONTROLLER
SC1408
August 22, 2000
1
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
ORDERING INFORMATION
Part Number
(1)
Package
Temp. Range (T
A
)
-40° to +85°C
SC1408IS.TR
SO-8
SC1408IMS.TR
MSOP-8
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
DESCRIPTION
The SC1408 is a low voltage boost controller that oper-
ates from a 1.8V to 16.5V input range. A shutdown pin
allows the user to turn the controller off reducing sup-
ply current to less than 2μA typical. Output voltage can
be preset to 5V or is adjustable from 3V to 16.5V with
a resistor divider. The controller changes frequency in
low load conditions to improve efficiency.
The SC1408 was designed for two cell Alkaline or sin-
gle cell Lithium Ion battery applications. With the
proper external components it can be used as a boost
converter or a buck/boost converter.
A current sense is implemented with an external resis-
tor that is not in the load current path.
The SC1408 operates in “bootstrapped” mode. When
the input voltage to the device is less than 2.5V during
startup, a low voltage 50% fixed duty cycle oscillator is
switched in to initiate boost action.
FEATURES
=
1.8V to 16.5V input range
=
Up to 10W output power
=
Preset 5V or adjustable output
=
Up to 300kHz switching frequency
=
10μA max shutdown current
=
Industrial temperature range
=
SO-8 or MSOP-8 package
APPLICATIONS
=
PDA Power supplies
=
Battery powered applications
=
Positive LCD Bias generator
=
Portable communications (cellular phones)
=
Peripheral card supplies
=
Industrial power supplies
TYPICAL APPLICATION - BOOST CONFIGURATION
Vin (1.8V to 16.5V)
Vout (3V to 16.5V)
U1
SC1408IS
8
1
2
3
4
5
6
7
ISENSE
GATE
BST
FB
SHDN
REF
AGND
GND
L1
R2
Q1
D1
+
C2
R4
R3
+
C3
C5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1408IMSTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Voltage, Boost DC-DC Controller |
| SC1408IS.TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:LOW VOLTAGE, BOOST DC-DC CONTROLLER |
| SC1408IS.TRT | 制造商:Semtech Corporation 功能描述:IC BOOST DC/DC VOLTAGE CONTROLLER 8-SOIC, Primary Input Voltage:16.5V, No. of Ou |
| SC1408ISTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Voltage, Boost DC-DC Controller |
| SC1409 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1 A Synchronous Switching Regulator |
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