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參數(shù)資料
| 型號： | SC1458BWLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Dual Output Low Noise LDO Linear Regulator |
| 中文描述： | 雙輸出低噪聲LDO線性穩(wěn)壓器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大小： | 223K |
| 代理商： | SC1458BWLTRT |
POWER MANAGEMENT
1
SC1458
Dual Output Low Noise LDO
Linear Regulator
Features
Input voltage range — 2.5 to 5.5V
Output voltages — 2.8V and 1.8V (SC1458A), 2.85V
and 2.85V (SC1458B)
Maximum output current — 300mA (each LDO)
Low 200mV maximum dropout at 200mA load
Quiescent current — 100μA (both LDOs enabled)
Shutdown current — 100nA
Output noise < 50μV
RMS
(SC1458B)
PSRR > 65dB at 1kHz (SC1458B)
Space saving package — MLPD-W6, 3mm x 3mm
Over-temperature protection
Short-circuit protection
Under-voltage lockout
Reset monitor for output A (SC1458A)
Applications
PDAs and cellular phones
GPS devices
Palmtop computers and handheld instruments
TFT/LCD applications
Wireless handsets
Digital cordless phones and PCS phones
Personal communicators
Two-way pagers
Wireless LAN
Description
The SC1458 is a family of dual output, ultra-low dropout
linear voltage regulators designed for use in battery
powered wireless applications. Both versions of the
SC1458 require an input voltage level between 2.5V and
5.5V. The SC1458A supplies 2.5V on OUTA and 1.8V on
OUTB, while SC1458B supplies 2.85V on both outputs.
(For other voltage options see the SC560).
The SC1458A provides a PGOOD output to hold a processor
in reset when the voltage on OUTA is not in regulation.
The SC1458B provides superior low-noise performance by
using an external bypass capacitor to filter the bandgap
reference. Both versions have a single enable pin that
controls both LDO outputs. The startup sequence delays
the start of OUTB by 128μs after OUTA is enabled.
Each version also provides protection circuitry such as
current limiting, under-voltage lockout, and thermal
protection to prevent device failures. Stability is
maintained by using 1μF capacitors on the output pins.
The MLPD package and 0402 ceramic capacitors minimize
the required PCB area.
SC1458A
C
IN
C
OUTA
C
OUTB
2.2
μ
F
1
μ
F
1
μ
F
To
μ
P
OUTA
2.5V, 300mA
OUTB
1.8V, 300mA
VIN
From
μ
P
OUTB
VIN
OUTA
GND
PGOOD
EN
Typical Application Circuit
September 12, 2007
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相關(guān)代理商/技術(shù)參數(shù) |
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| SC1460 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:5mA CAPLESSTM CHARGE PUMP |
| SC-1460 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CRYSTAL CLOCK OSCILLATORS |
| SC1460CSK-3.3 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:5mA CAPLESSTM CHARGE PUMP |
| SC1460CSK-5.0 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:5mA CAPLESSTM CHARGE PUMP |
| SC1461 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Multi Mode Capless Charge Pump |
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