SANKEN SI

●SI-3000B Series
SI-3000B Series
5-Terminal, Multi-Function, Full-Mold, Low Dropout Voltage Dropper Type
■Features
•
•
•
•
Compact full-mold package (equivalent to TO220)
Output current: 0.27A
Low dropout voltage: VDIF≤0.5V (at IO=0.27A)
Output ON/OFF control terminal is compatible with LS-TTL. (It may be directly
driven by LS-TTL or standard CMOS logic.)
• Built-in foldback overcurrent, thermal protection circuits
• Highly accurate overcurent protection starting current
SI-3157B : 0.3 to 0.7A (VIN=18V)
SI-3025B : 0.3 to 0.7A (When VIN=18V, setting VO=15.7V)
0.3 to 0.75A (When VIN=18V, setting VO=11.7V)
• Variable output voltage type (SI-3025B) also available
■Applications
• For BS and CS antenna power supplies
• Electronic equipment
■Absolute Maximum Ratings
Paarameter
(Ta=25°C)
Symbol
Ratings
Unit
DC Input Voltage
VIN
35
V
Voltage of Output Control Terminal
VC
VIN
V
IO
0.27*1
A
PD1
14(With infinite heatsink)
W
PD2
1.5(Without heatsink, stand-alone operation)
W
Junction Temperature
Tj
–40 to +125
°C
Ambient Operating Temperature
Top
–30 to +100
°C
Storage Temperature
Tstg
–40 to +125
°C
DC Output Current
Power Dissipation
Thermal Resistance (junction to case)
Rth(j-c)
7.0
°C/W
Thermal Resistance (junction to ambient air)
Rth(j-a)
66.7(Without heatsink, stand-alone operation)
°C/W
28
●SI-3000B Series
■Electrical Characteristics
(Ta=25°C unless otherwise specified)
Ratings
Parameter
Symbol
SI-3157B
min.
Input Voltage
Output Voltage
(SI-3025B: Reference
Voltage)
VIN
VO
*2
14.92
30
Voltage (SI-3025B: Temperature
(∆VREF/∆Ta)
120
Conditions
2.652
0.5
IO≤0.27A
90
10
VIN=(VO+1) to 27V, IO=0.27A
300
10
±0.5
VIN=18V, IO=5mA, Tj=0 to 100°C
VIN=VO+3V, IO=5mA, Tj=0 to 100°C
Iq
54
54
VIN=18V, f=100 to 120HZ
VIN=VO+3V, f=100 to 120HZ
3
10
3
VIN=18V, IO=0A
0.3
Conditions
0.7
VIN=18V
VC. IH
VC. IL
Control Current
IC. IH
Conditions
Control Current
IC. IL
(Output OFF)
Conditions
mV
(3025B:
mV/V)
mV
(3025B:
mV/V)
mV/°C
dB
10
0.3
mA
0.75
When VIN=18V, setting VO=11.7V
Conditions
Control Voltage (Output OFF)
V
VIN=VO+3V, IO=0A
0.3
Control Voltage (Output ON)
V
VIN=VO+3V, IO=0.2A
Starting Current*3,4
Terminal*5 (Output ON)
2.550
±1.5
RREJ
IS1
VC
27*1
VIN=VO+3V, IO=0 to 0.27A
Conditions
Overcurrent Protection
2.448
Unit
max.
VIN=18V, IO=0 to 0.27A
Conditions
Current
16.48
VIN=17 to 27V, IO=0.2A
Conditions
Quiescent Circuit
6*2,6
IO≤0.27A
∆VOLOAD
∆VO/∆Ta
Ripple Rejection
typ.
0.5
∆VOLINE
Temperature Coefficient of Output
Coefficient of Reference Voltage)
27*1
VIN=18V, IO=0.2A
VDIF
Conditions
Load Regulation
min.
V
Conditions
Line Regulation
15.70
SI-3025B
max.
(VREF)
Conditions
Dropout Voltage
typ.
A
0.7
When VIN=18V, setting VO=15.7V
2.0
2.0
V
0.8
0.8
20
VC=2.7V
20
VC=2.7V
–0.3
VC=0.4V
–0.3
µA
mA
VC=0.4V
*1: VIN(max) and IO(max) are restricted by the relation PD(max)=(VIN-VO)•IO=14(W).
*2: Refer to the dropout voltage.(Refer to Setting DC Input Voltage on page 7.)
*3: IS1 is specified at –5(%) drop point of output voltage VO on the condition that VIN=VO+3V, IO=0.2A.
*4: A foldback type overcurrent protection circuit is built into the IC regulator. Therefore, avoid using it for the following applications as it may cause
starting errors:
(1) Constant current load (2) Plus/minus power (3) Series power (4) VO adjustment by raising ground voltage
*5: Output is ON even when output control terminal VC is open. Each input level is equivalent to LS-TTL. Therefore, it may be directly driven by an
LS-TTL circuit.
*6. When setting output voltage to 5V or less, input voltage needs to be set to 6V or over to operate stably.
29
●SI-3000B Series
■Outline Drawing
(unit:mm)
φ 3.2±0.2
4.2±0.2
±0.2
2.8
Part Number
Lot Number
(2.0)
±0.15
0.95
(8.0)
(4.6)
+0.2
0.85 –0.1
+0.2
0.45 –0.1
P1.7±0.7×4=6.8±0.7
Plastic Mold Package Type
Flammability: UL94V-0
Weight: Approx. 2.3g
5.0±0.6
2.6±0.1
(17.9)
16.9±0.3
4.0±0.2
7.9±0.2
0.5
±0.2
10.0
3.9±0.7
(4.3)
8.2±0.7
SI-3157B
SI-3025B
q
w
e
r
t
q
w
e
r
t
GND
VC
VO
VOS
VIN
GND
VC
VO
VREF
VIN
Forming No. 1101
1 2 3 4 5
■Block Diagram
SI-3157B
SI-3025B
Tr1
5
3
MIC
Reg.
Amp.
Drive
VREF
2
Protection
ON/OFF
VREF
4
Equivalent
to LS-TTL
Equivalent
to LS-TTL
1
30
3
MIC
4
Amp.
Drive
Protection
ON/OFF
Reg.
2
Tr1
5
1
●SI-3000B Series
■Standard External Circuit
SI-3157B
D1
*2
5
+
DC Input
VIN
OPEN
*1
3
SI-3157B
2
4
+
1
C2
C1
C0 DC Output
VO
SI-3025B
D1 *2
5
DC Input
VIN
3
SI-3025B
OPEN 2
C2
+ *1
R1
*3
4
1
C1
R2
*3
+
C0
DC Output
VO
C0 : Output capacitor (47 to 100µF)
*1 C1 : Oscillation prevention capacitor
C2
(C1: Approx. 47µF, C2: 0.33µF)
These capacitors are required if the input line is inductive
and in the case of long wiring. Tantalum capacitors are recommended for C1 and C0, particularly at low temperatures.
*2 D1 : Protection diode
This diode is required for protection against reverse biasing
of the input and output. Sanken EU2Z is recommended.
*3 R1 : External resistor for setting output voltage
R2 Relationship between output voltage VO and external resistors R1 and R2 is as follows.
R1
VO=VREF • 1+
(VREF=2.55V(typ.))
R2
R2 must be 2.55kΩ for stable operation.
■Ta-PD Characteristics
Power Dissipation PD (W)
15
Infinite heatsink
With Silicon Grease
Heatsink: Aluminum
20
0×
20
10
10
0×
2m
0×
10
m
0×
75
5
2m
×7
m
5×
(2
.3
°C
(5.
2°
2m
m
/W
)
C/
(7.
W
6°C
)
/W
)
Without heatsink
0
–30
0
25
50
75
100
Ambient Temperature Ta (°C)
PD=IO•[VIN(mean)–VO]
31
●SI-3000B Series
■Typical Characteristics (When setting VO=15.7V for SI3025B)
(Ta=25°C)
IO vs. VDIF Characteristics
Temperature Coefficient of Output Voltage(SI-3157B)
0.5
VIN=18V
lO=0A
0.2
Output Voltage VO (V)
0.4
Output Voltage VO (V)
Dropout Voltage VDIF (V)
15.9
0.3
Rise Characteristics(SI-3157B)
20
16.0
15
15.8
15.7
lO=0A
0.1A
0.2A
0.27A
10
15.6
15.5
5
0.1
15.4
0
0
0.05
0.1
0.15
0.2
0.25
15.3
–40 –20
0.3
Output Current IO (A)
Line Regulation
20
40
60
0
0
80 100 120 140
25
30
Overcurrent Protection Characteristics(SI-3157B)
Output Voltage VO (V)
VIN=27V
25V
22V
18V
16.5V
15.5
15.3
15
V
Output Voltage VO (V)
15.7
VIN=27V
15.3
10
25V
18V
22V
5
15.1
14.9
14
16
18
20
22
24
26
28
14.9
0
0.05
Input Voltage VIN (V)
0.1
0.15
0.2
0.25
0.3
Output Current IO (A)
Output ON/OFF Control
Thermal Protection Characteristics
20
20
Output Voltage VO (V)
VIN=18V
lO=0A
Output Voltage VO (V)
20
VIN=16.5
0.27A
15.5
15.1
15
10
5
0
0
1
2
3
Output ON/OFF Control VC (V)
4
15
VIN=18V
lO=10mA
10
5
0
0
20
40
60
80 100 120 140 160 180
Case Temperature TC (°C)
Note on Thermal Protection:
The thermal protection circuit is intended for protection against heat during instantaneous shortcircuiting. Its operation is not guaranteed for shortcircuiting over extended periods of time.
32
15
15.9
lO=0A
0.1A
0.2A
15.7
10
20
16.1
15.9
5
Input Voltage VIN (V)
Load Regulation
16.1
Output Voltage VO (V)
0
Ambient Temperature TC (°C)
0
0
0.1
0.2
0.3
0.4
0.5
Output Current IO (A)
0.6
0.7