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參數資料
| 型號： | SC1452XIMSTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Dual 150mA LDO Regulator with Programmable Reset |
| 中文描述： | 雙150mA的LDO穩壓器，具有可編程復位 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 299K |
| 代理商： | SC1452XIMSTRT |
POWER MANAGEMENT
Description
The SC1452 is a state of the art device intended to
provide maximum performance and flexibility in battery
operated systems. It has been designed specifically to
fully support a single Li-Ion battery and its external charger
voltages.
1
www.semtech.com
SC1452
Dual 150mA LDO Regulator
with Programmable Reset
Features
Up to 150mA per regulator output
Low quiescent current (130
μ
A typical with both
outputs at 150mA)
Low dropout voltage
Wide selection of output voltages
Stable operation with ceramic caps
Tight load and line regulation
Current and thermal limiting
Reverse input polarity protection
<1
μ
A off-mode current
Logic controlled enable
Active low resets valid for V
IN
down to 0V
Programmable reset
Full industrial temperature range
10-Pin MSOP package. Also available in Lead-free,
fully WEEE and RoHS compliant
Applications
Cellular telephones
Palmtop/Laptop computers
Battery-powered equipment
Bar code scanners
SMPS post regulator/dc to dc modules
High efficiency linear power supplies
DSP supplies
Revision: September 20, 2006
Typical Application Circuit
The SC1452 contains two independently enabled, ultra
low dropout voltage regulators (ULDOs). It operates from
an input voltage range of 2.25V to 6.5V, and a wide
variety of output voltage options are available which are
designed to provide an initial tolerance of ±1% and ±2%
over temperature.
Each regulator has an associated active-low reset signal
which is asserted when the voltage output declines
below the preset threshold. Once the output recovers,
the reset continues to be asserted (delayed) for a
predetermined time, 50ms for reset A and 150ms for
reset B. In the case of regulator B, the delay time may be
reduced by the addition of an external capacitor.
The SC1452 has a bypass pin to enable the user to
capacitively decouple the bandgap reference for very low
output noise (down to 50μVrms).
The devices utilize CMOS technology to achieve very low
operating currents (typically 130uA with both
outputs supplying 150mA). The dropout voltage is
typically 155mV at 150mA, helping to prolong battery
life. In addition, the devices are guaranteed to provide
400mA of peak current for applications which require
high initial inrush current. They have been designed to
be used with low ESR ceramic capacitors to save cost
and PCB area.
The SC1452 comes in the low profile 10-lead MSOP
package.
3.3V IN
ENABLE OUTPUT A
ENABLE OUTPUT B
RESET B
RESET A
2.5V OUT
3.0V OUT
U1
SC1452FIMS
1
2
3
4
5
6
7
8
9
10
OUTA
OUTB
GND
RSTA
RSTB
DLYB
ENB
BYP
ENA
IN
COUTA
1uF
CBYP
10nF
CDLYB
10nF
CIN
1uF
COUTB
1uF
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| SC1452XIMSTR | DUAL 150mA LDO REGULATOR WITH PROGRAMMABLE RESET |
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相關代理商/技術參數 |
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|---|---|
| SC1453 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453_06 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453_08 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453-1.5ISKTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
| SC1453-1.8ISKTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:150mA Ultra Low Dropout Regulator with Low Noise Bypass |
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