Parameter
DC Input Voltage Range
DC Output Current Range
Operating Junction Temperature
Ambient Operating Temperature
Symbol
VIN
IO
Tjop
Taop
sFeatures
• Compact surface-mount package (SOP-8)
• Output current: 1 A
• Low current consumption: Iq(OFF) ( 1
µA (VC = 0 V)
• Low dropout voltage: VDIF
≤0.8 V (at IO = 1 A)
VDIF
≤1.2 V (IO = 1 A) for SI-3018LSA
• 4 types of output voltages (1.8 V, 2.5 V, 3.3 V, 5.0 V) available
• Output ON/OFF control compatible with LS-TTL
• Built-in foldback overcurrent, thermal protection circuits
sApplications
• Auxiliary power supply for PC
• Battery-driven electronic equipme
sAbsolute Maximum Ratings
SI-3000LSA Series
Surface-Mount, Low Current Consumption, Low Dropout Voltage Dropper Type
Unit
V
A
W
W
°C
°C
°C
°C/W
°C/W
Ratings
16
1
1.16
1.1
–30 to +150
–30 to +150
–30 to +150
36
100
Symbol
VIN
IO
PD1*1
PD2*2
Tj*3
Top
Tstg
θj-I
θj-a*2
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Junction Temperature
Ambient Operating Temperature
Storage Temperature
Thermal Resistance (Junction to Lead (pin 8))
Thermal Resistance (Junction to Ambient Air)
(Ta=25
°C)
sRecommended Operating Conditions
*1: VIN (max) and IO (max) are restricted by the relationship PD = (VIN – VO)
× IO.
Calculate these values referring to the reference data.
*2: Refer to the dropout voltage section.
Ratings
SI-3018LSA
SI-3025LSA
SI-3033LSA
SI-3050LSA
3.1 to 3.5*1
*2 to 3.5*1
*2 to 5.2*1
*2 to 8.0
0 to 1
–20 to +125
–30 to +85
Unit
V
A
°C
°C
qSI-3000LSA Series
*1: When mounted on glass-epoxy board 56.5
× 56.5 mm (copper laminate area 100%)
*2: When mounted on glass-epoxy board 40
× 40 mm (copper laminate area 100%).
*3: Thermal protection circuits may operate if the junction temperature exceeds 135
°C
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