1-1-4 Linear Regulator ICs
SI-3000LSA Series Surface-Mount, Low Current Consumption, Low Dropout Voltage
■Features
■Absolute Maximum Ratings
(Ta=25°C)
• Compact surface-mount package (SOP8)
Parameter
Symbol
Ratings
Unit
V
DC Input Voltage
VIN
16
• Output current: 1 A
Output control terminal voltage
DC Output Current
VC
VIN
1
V
• Low circuit current at output OFF: Iq(OFF) ≤ 1
µA (VC = 0 V)
IO
A
*1
PD1
1.16
W
Power Dissipation
*2
PD2
1.1
W
• Low dropout voltage: VDIF≤0.8 V (at IO = 1 A)
VDIF ≤1.2 V (IO = 1 A) for SI-3018LSA
*3
Junction Temperature
Tj
–30 to +150
–30 to +150
–30 to +150
36
°C
Operating Ambient Temperature
Storage Temperature
Top
Tstg
θj-L
°C
• 4 types of output voltages (1.8 V, 2.5 V, 3.3 V,
5.0 V) available
°C
Thermal Resistance (Junction to Lead (pin 8))
Thermal Resistance (Junction to Ambient Air)
°C/W
°C/W
*2
θj-a
100
• Output ON/OFF control terminal voltage
compatible with LS-TTL
*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 be activated if the junction temperature exceeds 135°C.
• Built-in foldback-type-overcurrent and thermal
protection circuits
■Applications
• Auxiliary power supplies for PC
• Battery-driven electronic equipment
■Recommended Operating Conditions
Ratings
0 to 1
Parameter
Symbol
Unit
SI-3018LSA
3.1 to 3.5*1
SI-3025LSA
*2 to 3.5*1
SI-3033LSA
*2 to 5.2*1
SI-3050LSA
*2 to 8.0
DC Input Voltage Range
VIN
IO
V
A
DC Output Current Range
Operating Junction Temperature
Operating Ambient Temperature
Tjop
Taop
–20 to +125
–30 to +85
°C
°C
*1: VIN (max) and IO (max) are restricted by the relation PD = (VIN – VO) × IO.
Please calculate these values referring to the reference data on page 69.
*2: Refer to the Dropout Voltage parameter.
■Electrical Characteristics
(Ta=25°C, VC=2V, unless otherwise specified)
Ratings
Parameter
Symbol
SI-3018LSA
typ.
SI-3025LSA
typ.
SI-3033LSA
typ.
SI-3050LSA
typ.
Unit
V
min.
max.
min.
max.
2.550
min.
max.
min.
4.90
max.
5.10
VO
1.764
1.800
1.836
2.450
2.500
3.234
3.300
3.366
5.00
Output Voltage
Conditions
VDIF
VIN=3.3V, IO=0.5A
VIN=3.3V, IO=0.5A
0.4
VIN=5V, IO=0.5A
VIN=6V, IO=0.5A
–
–
0.4
0.8
10
0.4
0.8
15
Conditions
IO≤0.5A
IO≤0.5A
IO≤0.5A
Dropout Voltage
V
0.6
1.2
10
0.8
10
Conditions
∆VLINE
IO≤1A
2
2
3
3
Line Regulation
Load Regulation
mV
mV
mV/°C
dB
Conditions
∆VOLOAD
Conditions
∆VO/∆Ta
Conditions
RREJ
VIN=3.1 to 3.5V, IO=0.3A
10 20
VIN=3.1 to 3.5V, IO=0.3A
10 20
VIN=4.5 to 5.5V, IO=0.3A
10 20
VIN=6 to 7V, IO=0.3A
10
VIN=6V, IO=0 to 1A
±0.5
30
VIN=3.3V, IO=0 to 1A
VIN=3.3V, IO=0 to 1A
VIN=5V, IO=0 to 1A
Temperature Coefficient of
Output Voltage
±0.3
±0.3
±0.3
V
IN=3.3V, I
O
=5mA, Tj=0 to 100°C
V
IN=3.3V, I
O=5mA, Tj=0 to 100°C
V
IN=5V, I
O=5mA, Tj=0 to 100°C
VIN=6V, IO=5mA, Tj=0 to 100°C
60
VIN=3.3V, f=100 to 120HZ
57
VIN=3.3V, f=100 to 120HZ
55
VIN=5V, f=100 to 120HZ
55
VIN=6V, f=100 to 120HZ
Ripple Rejection
Conditions
Iq
1.7
2.5
1.7
2.5
1.7
2.5
1.7
2.5
Quiescent Circuit Current
Circuit Current at Output OFF
mA
µA
Conditions
Iq(OFF)
Conditions
IS1
VIN=3.3V, IO=0A
VIN=3.3V, IO=0A
VIN=5V, IO=0A
VIN=6V, IO=0A
1
1
1
1
VIN=3.3V, IO=0A, VC=0V
VIN=3.3V, IO=0A, VC=0V
VIN=5V, IO=0A, VC=0V
1.2
VIN=6V, IO=0A, VC=0V
1.2
Overcurrent Protection
Starting Current*1,3
1.2
1.2
A
Conditions
VC, IH
VIN=3.3V
2.0
VIN=3.3V
2.0
VIN=5V
VIN=6V
Control Voltage (Output ON)*2
Control Voltage (Output OFF)*2
2.0
2.0
V
VC, IL
0.8
0.8
0.8
80
0.8
80
V
C
IC, IH
40
0
80
40
0
80
40
0
40
0
Control Current (Output ON)
Control Current (Output OFF)
µA
Terminal
Conditions
IC, IL
VC=2V
VC=0V
–5
–5
–5
–5
µA
Conditions
*1: Is1 is specified at the 5% drop point of output voltage VO on the condition that VIN = 3.3 V (5 V for SI-3033LSA), and IO = 0.5 A.
*2: Output is OFF when the output control terminal VC is open. Each input level is equivalent to LS-TTL level. Therefore, the device can be driven directly by LS-TTLs.
*3: These products cannot be used in the following applications. Because these applications require a certain current at start-up and so the built-in foldback-type overcurrent
protection may cause errors during start-up stage.
(1) Constant current load (2) Positive and negative power supply (3) Series-connected power supply (4) VO adjustment by raising ground voltage
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