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Semtech - 1A Low Dropout / Low Quiescent Current Voltage Regulator

Numéro de référence SC1118
Description 1A Low Dropout / Low Quiescent Current Voltage Regulator
Fabricant Semtech 
Logo Semtech 





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SC1118 fiche technique
SC1118
1A (Sink & Source) Low Dropout, Low
Quiescent Current Voltage Regulator
POWER MANAGEMENT
Description
Features
The SC1118 family of low dropout regulators has the
unique capability of maintaining output regulation while
sourcing or sinking current. The 2.85V output voltage
option is ideal for use as a Boulay termination of up to
27 SCSI data lines. The regulator maintains regulation
while both sourcing and sinking current, enabling the use
of active negation drivers for improved noise immunity
on the data lines. Regulation of output voltage is
maintained for TERMPWR voltages as low as 4.0V. When
unloaded, quiescent supply current is a low 2mA,
allowing continuous connection to the TERMPWR lines.
An ultra low power shutdown mode is also available on
the SO-8 version. In shutdown the output is high
impedance and supply current drops to 100µA (typ.).
Current limits in both sourcing and sinking modes, plus
on-chip thermal shutdown make the circuit tolerant of
output fault conditions.
‹ Regulates while sourcing or sinking current
‹ Provides termination for up to 27 SCSI lines
‹ 2mA quiescent current
‹ Ultra low power shutdown mode
‹ Current limit and thermal shutdown protection
‹ Stable for any CLOAD 0.22µF
‹ Fast settling time
‹ SOT-223 and SO-8 surface mount packages
Applications
‹ Active negation SCSI terminations
‹ Computers
‹ Disk drives
‹ CD-ROM drives
‹ Supply splitter
The SC1118 is available in the 3-lead SOT-223 and
8-lead SO-8 packages.
Typical Application Circuits
U1 SC1118S-x.x
VIN
1, 4 IN
OUT 2
C1
1uF
8 EN GND NC 5
3, 6, 7
VOUT
C2
1uF
VIN
U1 SC1118ST-x.x
31
IN OUT
C1
1uF
GND
2, TAB
VOUT
C2
1uF
U1 SC1118S
VIN
1, 4
IN
2
OUT
C1
1uF
8 EN GND FB 5
3, 6, 7
VOUT
R1 C2
1uF
R2
Rewvwiswio.Dna: tJauSnhee1e0t4,U2.c0o0m4
www.DataSheet4U.com
1
VOUT
=
VFB
1 +
R1
R2

+
IFB
R1
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www.semtech.com

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