Sanken Electric Co SI-3025B Datasheet

●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
DC Input Voltage
Voltage of Output Control Terminal
DC Output Current

Power Dissipation

Junction Temperature
Ambient Operating Temperature
Storage T emperature
Thermal Resistance (junction to case)
Thermal Resistance (junction to ambient air)

Symbol

VIN

VC

IO
PD1
PD2

Tj

Top

Tstg

Rth(j-c)
Rth(j-a)

Ratings

35

VIN

*1

0.27

14(With infinite heatsink)

1.5(Without heatsink, stand-alone operation)
–40 to +125
–30 to +100
–40 to +125

7.0

66.7(Without heatsink, stand-alone operation)

(Ta=25°C)

Unit

V
V

A
W
W

°C
°C

°C
°C/W
°C/W

28

●SI-3000B Series

■Electrical Characteristics

(Ta=25°C unless otherwise specified)

Ratings

Parameter

Input Voltage
Output Voltage
(SI-3025B: Reference
Voltage)

Dropout Voltage

Line Regulation

Load Regulation

Temperature Coefficient of Output
Voltage (SI-3025B: Temperature
Coefficient of Reference Voltage)

Ripple Rejection

Quiescent Circuit
Current

Overcurrent Protection
Starting Current

*3,4

Control Voltage (Output ON)
Control Voltage (Output OFF)

VC

Control Current

Terminal*5(Output ON)

Control Current

(Output OFF)

Symbol

VIN

(VREF)

Conditions

VDIF

Conditions

∆VOLINE

Conditions

∆VOLOAD

Conditions

∆VO/∆Ta

(∆V

REF

Conditions
RREJ
Conditions

Conditions

Conditions

Conditions

VC. IH

VC. IL

IC. IH
Conditions
IC. IL
Conditions

VO

IS1

Iq

/∆Ta)

SI-3157B

min. typ. max.

*2

27

*1

14.92 15.70 16.48

VIN=18V, IO=0.2A

0.5

IO≤0.27A

30 90

VIN=17 to 27V, IO=0.2A

120 300

VIN=18V, IO=0 to 0.27A

±1.5

VIN=18V, IO=5mA, Tj=0 to 100°C

54

VIN=18V, f=100 to 120HZ

310

VIN=18V, IO=0A

0.3 0.7
VIN=18V

2.0

0.8
20

VC=2.7V

–0.3

VC=0.4V

SI-3025B

min. typ. max.

*2,6

6

27

*1

2.448 2.550 2.652

VIN=VO+3V, IO=0.2A

0.5

IO≤0.27A

10

VIN=(VO+1) to 27V, IO=0.27A

10

VIN=VO+3V, IO=0 to 0.27A

±0.5

VIN=VO+3V, IO=5mA, Tj=0 to 100°C

54

VIN=VO+3V, f=100 to 120HZ

310

VIN=VO+3V, IO=0A

0.3 0.75
When VIN=18V, setting VO=11.7V

0.3 0.7
When VIN=18V, setting VO=15.7V

2.0

0.8
20

VC=2.7V

–0.3

VC=0.4V

Unit

V

V

V

mV

(3025B:

mV/V)

mV

(3025B:

mV/V)

mV/°C

dB

mA

A

V

µA

mA

*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 f oldbac k type o v ercurrent protection circuit is b uilt into the IC regulator. Therefore, avoid using it f or 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