18 IC
1-1-1 Linear Regulator IC
■Features
• Compact surface mount package (TO252-3)
• Output current: 1.0 A
• Low dropout voltage: VDIF ≤ 0.6V (at IO=1.0 A)
• Low current consumption: Iq ≤ 450
µ
A
(700
µ
A for SI-3050KMS/3090KMS/ 3120KMS/
3150KMS)
• Built-in overcurrent and thermal protection
circuits
• Compatible with low ESR capacitor application
(Except for SI-3050KMS/3090KMS/3120KMS/
3150KMS)
■Absolute Maximum Ratings
■Recommended Operating Conditions
Unit
V
A
W
°C
°C
°C/W
°C/W
Symbol
VIN
IO
PD*2
Tj
Tstg
θ
j-a*2
θ
j-c
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance
(Junction to Ambient Air)
Thermal Resistance
(Junction to case)
*1: A built-in input-overvoltage-protection circuit shuts down the output voltage at the Input Overvoltage Shutdown Voltage
of the electrical characteristics.
*2: When mounted on glass-epoxy board of 900mm2 (copper laminate area 4.3%).
Parameter
Input Voltage Range
Output Current Range
Operating Ambient Temperature
Operating Junction Temperature
Symbol
VIN
IO
Top
Tj
Unit
V
A
°C
°C
*1: VIN (max) and IO (max) are restricted by the relation PD = (VIN-VO) × IO. Please calculate these values referring to the Copper laminate area vs. Power dissipation data as shown
hereinafter.
*2: Refer to the Dropout Voltage parameter.
(Ta=25°C)
Unit
V
mV
mV
V
µ
A
mV/°C
dB
A
V
Parameter
Output Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Circuit
Current
Temperature Coefficient
of Output Voltage
Ripple Rejection
Overcurrent Protection
Starting Current*
2
Input Overvoltage
Shutdown Voltage
Symbol
VO
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
VDIF
Conditions
Conditions
Iq
Conditions
∆VO/∆Ta
Conditions
RREJ
Conditions
IS1
Conditions
Vovp
Conditions
*1: Refer to the Dropout Voltage parameter.
*2: Is1 is specified at the 5% drop point of output voltage VO under the condition of Output Voltage parameter.
*3: SI-3050KMS, SI-3090KMS, SI-3120KMS and SI-3150KMS cannot be used in the following applications because 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
Ratings
SI-3018KMS/3025KMS/ SI-3050KMS/3090KMS
3033KMS 3120KMS/3150KMS
17 35*1
1.0
1
–30 to +125
–30 to +125
95
6
Ratings
SI-3018KMS SI-3025KMS SI-3033KMS SI-3050KMS SI-3090KMS SI-3120KMS SI-3150KMS
2.4*2 to 5.0*1*2 to 5*1*2 to 6*1*2 to 15 *2 to 20 *2 to 25 *2 to 27
0 to 1.0
–30 to +85
–20 to +100
Ratings
SI-3018KMS SI-3025KMS SI-3033KMS SI-3050KMS SI-3090KMS SI-3120KMS SI-3150KMS
min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max. min. typ. max.
1.755 1.800 1.845 2.45 2.50 2.55 3.234 3.300 3.366 4.90 5.00 5.10 8.82 9.00 9.18 11.76 12.00 12.24 14.70 15.00 15.30
V
IN
=2.5V, I
O
=10mA V
IN
=3.3V, I
O
=10mA V
IN
=5V, I
O
=10mA V
IN
=7V, I
O
=10mA V
IN
=11V, I
O
=10mA V
IN
=14V, I
O
=10mA V
IN
=17V, I
O
=10mA
15 15 15 30 54 72 90
V
IN
=2.5 to 6V, I
O
=10mA V
IN
=3.3 to 8V, I
O
=10mA V
IN
=5 to 10V, I
O
=10mA V
IN
=6 to 11V, I
O
=10mA V
IN
=10 to 15V, I
O
=10mA V
IN
=13 to 18V, I
O
=10mA V
IN
=16 to 26V, I
O
=10mA
40 40 60 75 135 180 225
V
IN
=2.5V, I
O
=0 to 1A V
IN
=3.3V, I
O
=0 to 1A
VIN=5V, IO=0 to 1A VIN=7V, IO=0 to 1A
V
IN
=11V, I
O
=0 to 1A
VIN=4V, IO=0 to 1A
V
IN
=17V, I
O
=0 to 1A
0.6 0.4 0.4 0.4 0.3 0.3 0.3
IO=0.5A IO=0.5A IO=0.5A IO=0.5A IO=0.5A IO=0.5A IO=0.5A
0.6 0.6 0.6 0.6 0.6 0.6 0.6
IO=1A IO=1A IO=1A IO=1A IO=1A IO=1A IO=1A
450 450 450 700 700 700 700
VIN=2.5V, IO=0A VIN=3.3V, IO=0A VIN=5V, IO=0A VIN=7V, IO=0A VIN=11V, IO=0A VIN=14V, IO=0A VIN=17V, IO=0A
±0.2 ±0.3 ±0.3 ±0.5 ±1.0 ±1.5 ±1.5
Tj=0 to 100°CTj=0 to 100°CTj=0 to 100°CTj=0 to 100°CTj=0 to 100°CTj=0 to 100°CTj=0 to 100°C
55 55 55 75 68 66 63
VIN=2.5V, f=100 to 120 HZVIN=3.3V, f=100 to 120HZ
V
IN
=5V, f=100 to 120H
Z
V
IN
=7V, f=100 to 120H
Z
VIN=11V, f=100 to 120HZVIN=14V, f=100 to 120HZVIN=17V, f=100 to 120HZ
1.1 1.1 1.1 1.1 1.1 1.1 1.1
VIN=2.5V VIN=3.3V VIN=5V VIN=7V VIN=11V VIN=14V VIN=17V
26 30 33 33
IO=10mA IO=10mA IO=10mA IO=10mA
■Electrical Characteristics
Surface Mount, Low Current Consumption, Low Dropout Voltage Linear Regulator IC
SI-3000KMS Series
■Applications
•Secondary stabilized power supply (local power supply)
19
IC
SI-3000KMS Series
■Typical Connection Diagram
CIN:Input capacitor (22
µ
F or larger)
CO:Output capacitor
*1: SI-3018KMS/3025KMS/3033KMS (22
µ
F or larger)
Co has to be a low ESR capacitor such as a ceramic capacitor.
When using the electrolytic capacitor, oscillation may occur at a low tempera-
ture.
SI-3050KMS/3090KMS/3120KMS/3120KMS/3150KMS (47
µ
F or larger)
If a low ESR capacitor is used, oscillation may occur.
*2: D1: Reverse bias protection diode
This diode is required for protection against reverse biasing between the
input and output.
(Sanken SFPL-52 is recommended.)
This diode is not required at VO≤3.3V.
GND
2
V
IN
C
IN
1
V
O
3
+
D1
*2
C
O
Load
+
*1
■Block Diagram
1VIN
REF
VOUT
GND
2
3
TSD
-
+
■External Dimensions (Unit : mm)
Pin Assignment
qVIN
wGND (Common to the rear side of product)
eVOUT
Plastic Mold Package Type
Flammability: UL94V-0
Product Mass: Approx. 0.33g
6.60
±0.20
C0.60
5.34
±0.20
0.76
±0.10
2.30
±0.20
0.50
±0.10
(1.00)
MAX 0.96
2.30 TYP 2.30 TYP
SEATING PLANE 0.00 to 0.127
1.10
±0.20
6.10
±0.20
2.70
±0.20
9.90
±0.30
(0.89)
(5°)
(5°)
8°
(0.80)
6.60
±0.20
(5.04)
5.34
±0.20
R0.25
(1.50)
(4.41)
2.70
±0.20
0.50
±0.10
2.30
±0.10
1.524
+0.254
–0.127
(5°)
9.90
±0.30
0.1
■Reference Data
Copper Laminate Area-Thermal Resistance Copper Laminate Area-Power Dissipation Obtaining the junction temperature
Measure the temperature TC at the lead part
of the GND pin with a thermocouple, etc.
Then, substitute this value in the following
formula to obtain the junction temperature.
T
j
=P
D
× θ
j–C
+ T
C
(
θ
j–C
= 6
°
C/W)
P
D
=(V
IN–
V
O
)
×
I
OUT
10 100 1000
40
50
60
70
80
90
100
Copper Laminate Area (mm2)
Glass-epoxy board: 30×30mm
θ
j-a(°C/W)
Glass-epoxy board: 30×30mm
0
0.5
1
1.5
Power Dissipation PD (W)
Ta=25°C
40°C
60°C
85°C
10 100 1000
Copper Laminate Area (mm2)
Case temperature Tc
measurement point