SI-3018LSA Datasheet

1-1-4 Linear Regulator ICs
SI-3000LSA Series
Surface-Mount, Low Current Consumption, Low Dropout Voltage
■Features
■Absolute Maximum Ratings
• Compact surface-mount package (SOP8)
Parameter
• Output current: 1 A
• Low circuit current at output OFF: Iq(OFF) ≤ 1
µA (VC = 0 V)
VDIF ≤1.2 V (IO = 1 A) for SI-3018LSA
• Output ON/OFF control terminal voltage
compatible with LS-TTL
Unit
VIN
16
V
Output control terminal voltage
VC
VIN
V
DC Output Current
IO
1
A
PD1*1
1.16
W
PD2*2
1.1
W
Tj*3
–30 to +150
°C
Operating Ambient Temperature
Top
–30 to +150
°C
Storage Temperature
Tstg
–30 to +150
°C
Thermal Resistance (Junction to Lead (pin 8))
θ j-L
36
°C/W
Thermal Resistance (Junction to Ambient Air)
θ j-a *2
100
°C/W
Junction Temperature
• 4 types of output voltages (1.8 V, 2.5 V, 3.3 V,
5.0 V) available
Ratings
DC Input Voltage
Power Dissipation
• Low dropout voltage: VDIF≤0.8 V (at IO = 1 A)
(Ta=25°C)
Symbol
*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
Parameter
Symbol
SI-3018LSA
SI-3025LSA
3.1 to 3.5*1
*2
SI-3033LSA
to 3.5*1
*2
Unit
SI-3050LSA
to 5.2*1
*2
DC Input Voltage Range
VIN
to 8.0
DC Output Current Range
IO
0 to 1
V
A
Operating Junction Temperature
Tjop
–20 to +125
°C
Operating Ambient Temperature
Taop
–30 to +85
°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 71.
*2: Refer to the Dropout Voltage parameter.
■Electrical Characteristics
(Ta=25°C, VC=2V, unless otherwise specified)
Ratings
Parameter
Symbol
VO
Output Voltage
Conditions
SI-3018LSA
SI-3033LSA
typ.
max.
min.
typ.
max.
min.
1.764
1.800
1.836
2.450
2.500
2.550
3.234
VIN=3.3V, IO=0.5A
VDIF
VIN=3.3V, IO=0.5A
–
Conditions
Dropout Voltage
SI-3025LSA
min.
Conditions
Temperature Coefficient of
Output Voltage
Conditions
IO≤0.5A
0.8
Overcurrent Protection
Starting Current*1,3
IS1
Control Voltage (Output OFF)*2
VC
Terminal
Control Current (Output ON)
Control Current (Output OFF)
VC, IH
10
2
10
Conditions
10
3
15
10
20
20
20
VIN=3.3V, IO=0 to 1A
VIN=5V, IO=0 to 1A
VIN=6V, IO=0 to 1A
±0.3
±0.3
±0.3
±0.5
VIN=3.3V, IO=5mA, Tj=0 to 100°C
VIN=3.3V, IO=5mA, Tj=0 to 100°C
VIN=5V, IO=5mA, Tj=0 to 100°C
VIN=6V, IO=5mA, Tj=0 to 100°C
60
57
55
55
VIN=3.3V, f=100 to 120HZ
VIN=3.3V, f=100 to 120HZ
VIN=5V, f=100 to 120HZ
VIN=6V, f=100 to 120HZ
1.7
1.7
1.7
1.7
2.5
VIN=3.3V, IO=0A
2.5
VIN=3.3V, IO=0A
1
VIN=5V, IO=0A
1
VIN=3.3V, IO=0A, VC=0V
VIN=3.3V, IO=0A, VC=0V
1.2
1.2
VIN=3.3V
1
VIN=5V, IO=0A, VC=0V
VIN=6V, IO=0A, VC=0V
1.2
VIN=5V
2.0
2.0
80
40
80
0
–5
0
–5
0.8
0.8
40
80
40
80
0
–5
0
–5
VC=2V
VC=0V
*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
70
ICs
dB
mA
µA
A
VIN=6V
2.0
0.8
40
mV/ °C
VIN=6V, IO=0A
1.2
0.8
mV
2.5
1
VIN=3.3V
2.0
2.5
mV
30
VIN=3.3V, IO=0 to 1A
Conditions
IC, IL
3
10
VC, IL
IC, IH
V
0.8
10
Conditions
ON)*2
IO≤0.5A
0.8
10
Iq(OFF)
Conditions
V
0.4
VIN=6 to 7V, IO=0.3A
Conditions
Circuit Current at Output OFF
5.10
0.4
IO≤0.5A
1.2
5.00
VIN=6V, IO=0.5A
VIN=4.5 to 5.5V, IO=0.3A
Iq
Quiescent Circuit Current
4.90
VIN=3.1 to 3.5V, IO=0.3A
RREJ
Ripple Rejection
Control Voltage (Output
2
∆VO/∆Ta
Conditions
3.366
max.
VIN=3.1 to 3.5V, IO=0.3A
∆VOLOAD
Load Regulation
3.300
Unit
typ.
IO≤1A
∆VLINE
Conditions
min.
VIN=5V, IO=0.5A
Conditions
Line Regulation
max.
0.4
–
0.6
SI-3050LSA
typ.
V
µA
µA
SI-3000LSA Series
■External Dimensions (SOP8)
(Unit : mm)
5.1±0.4
1.27
0.15+0.1
–0.05
6
5
1
2
3
4
6.2±0.3
7
4.4±0.2
8
Pin Assignment
q VIN
w NC (Leave open)
e VIN
r VC
t GND
y GND
u VO
i VO
0.5±0.1
0.4±0.1
10
°
1.27
1.5±0.1
Plastic Mold Package Type
Flammability: UL94V-0
Product Mass: Approx. 0.1g
0.05±0.05
0.10
0.4±0.1
1.55±0.15
0
to
0.995max.
0.12 M
■Block Diagram
VIN 1
8
NC 2
7 VO
VO
+
–
VIN 3
TSD
6
VC 4
GND
5
GND
■Typical Connection Diagram
+
CIN
1
8
2
7
3
6
4
VO
+
5
VIN
GND
CO: Output capacitor (22 µF or larger)
CIN: Input capacitor (10 µF)
This capacitor is required in the case of an inductive input line or long
wiring.
Tantalum capacitors are recommended for CIN and CO, particularly at
low temperatures.
* Leave pin 2 open.
Load
VIN
CO
VC
■Reference Data
PCB Copper Laminate Area vs. Junction to
Ambient Air Thermal Resistance
Allowable Output Current
(vs. VIN-VOUT Voltage Difference)
VIN-IO max
150
140
1.2
PCB (glass-epoxy, 40×40mm)
160mm (40×40) mm
Tj = 120°C (20% derating of 150°C)
1.0
The inner frame stage, on which the PTr is mounted,
is directly connected to the VOUT pin.
Therefore, enlarging the copper laminate area
around the VOUT pin is really effective for a heat
radiation.
130
120
Iout (max) (A)
θ j-a (°C/W)
0.8
110
100
θ j-a=100°C/W
0.6
0.4
Ta=25°C
0.2
Ta=85°C
90
80
70
100
0
1000
Copper Laminate Area (mm2)
5000
1
2
3
4
VIN-VOUT Voltage Difference (V)
ICs
71