1
Surface-mount, Separate Excitation Switching Type
s
Absolute Maximum Ratings
s
Features
Surface-mount 16 pin package
Output current: 3.0 A
High efficiency: 91% (at V
IN
= 10 V, l
O
= 1 A, V
O
= 5 V)
High operating efficiency of 250 kHz allows reduction of choke coil.
A 1 V reference voltage (Vref) of variable output voltage type can support
output voltage from 1 V to 24 V.
Wide Input Voltage Range (8 to 50 V)
Output ON/OFF capable
Built-in overcurrent protection and thermal protection circuit
*1: Limited due to thermal protection.
*2: When mounted on glass-epoxy board 700 cm
2
(copper foil area 30.8 cm
2
)
Parameter
DC Input Voltage Range
Output Voltage Range
Output Current Range
Operating Junction Temperature Range
Operating Temperature Range
Symbol
V
IN
V
O
I
O
T
jop
T
op
Ratings
SPI-8010A
SPI-8050A
(8 or V
O
+3)
*1
to 50
*2
8 to 50
1 to 24
0.02 to 3.0
30 to +125
30 to +125
Unit
V
W
C
C
C/W
C/W
Ratings
53
2.4
+125
40 to +125
18
50
Symbol
V
IN
P
D
*1, *2
T
j
T
stg
R
th(j-c)
*2
R
th(j-a)
*2
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (junction to case)
Thermal Resistance (junction to ambient air)
(T
a
=25
C)
s
Recommended Operating Conditions
*1: The minimum value of an input voltage range is the higher of either 8V or V
O
+3 V.
*2: See the following table for the maximum value of the input voltage range.
Input voltage range in
output voltage 5-24V
is V
O
+3-50V.
s
DC Input Voltage Range
s
Applications
Onboard local power supplies
OA equipment
For stabilization of the secondary stage output voltage of switching power supplies
0
1
2
3
5
4
60
50
40
30
20
10
0
Output Voltage V
O
(V)
Input Voltage V
IN
(V)
T
a
=25
C
q
SPI-8000A Series
SPI-8000A Series
2
*5: No. 2 terminal is a CE/SS terminal to enable soft start by connecting a
capacitor. The output can be turned on and off by using a CE/SS terminal.
The output is stopped by decreasing the CE/SS terminal voltage below
VSSL and in order to perform ON/OFF operation of V
OUT
, it is required to
connected NPN transistor or the output of open collector type TTL be-
tween No. 5 terminal and GND.
In case that both soft start and V
OUT
ON/OFF are used, a protection mea-
sure such as limitation of current is required, as the discharge current of
C4 flows across a transistor for ON/OFF operation, if the capacitance of
C4 large. As a pull-up type resistor is provided inside the IC, no external
voltage can be applied.
SPI-8000A
SPI-8000A
CE/SS
4
CE/SS
4
CE/SS
C4
C4
4
V
O.
ON/OFF
Soft start
Soft start
+V
O.
ON/OFF
SPI-8000A
s
Electrical Characteristics
(T
a
=25
C)
s
Application Notes
Parallel Operation:
The parallel operation to increase the current is not available.
Thermal Protection Characteristics:
The SPI-8000A series has a thermal protection circuit. This circuit keeps the IC from the fever by the over load. But this circuit cannot
guarantee the long-term reliability against the continuously over load status.
s
Handling Remarks to Prevent Damage by Static Electricity
Considerations to protect the Products from Electrostatic Discharge
When handling the devices, operator must be grounded. Grounded wrist straps be worn and should have at least 1 M
of resistance near
operators to ground to prevent shock hazard.
Workbenches where the devices are handled should be grounded and be provided with conductive table and floor mats.
When using measuring equipment such as a curve tracer, the equipment should also be grounded.
When soldering the devices, the head of a soldering iron or a solder bath must be grounded in other to prevent leak voltage generated by
them being applied to the devices.
The devices should always be stored and transported in our shipping containers or conductive containers, or be wrapped up in aluminum foil.
q
SPI-8000A Series
Parameter
Output Voltage
*1
Efficiency
Switching Frequency
Line Regulation
Load Regulation
Temperature Coefficient
of Output Voltage
*3
Overcurrent Protection
Starting Current
Quiescent Circuit Current
Off Circuit Current
CE/SS
*5
Low Level Voltage
Terminal
Leak Current at
Low Voltage
Unit
V
%
kH
Z
mV
mV
mV/
C
A
mA
A
V
A
Symbol
V
O
(V
REF
)
*2
Conditions
Eff
Conditions
F
OSC
Conditions
V
OLINE
Conditions
V
OLOAD
Conditions
V
O
/
T
a
V
REF
/
T
a
*4
I
S
Conditions
I
q
Conditions
I
q
(
off
)
Conditions
V
SSL
I
SSL
Conditions
Rating
SPI-8010A (Variable type)
SPI-8050A
min.
typ.
max.
min.
typ.
max.
0.97
1.00
1.03
4.85
5.00
5.15
V
IN
=12V, I
O
=1A
V
IN
=20V, I
O
=1A
86
86
V
IN
=20V, I
O
=1A, V
O
=5V
V
IN
=20V, I
O
=1A
250
250
V
IN
=12V, I
O
=1A
V
IN
=12V, I
O
=1A
20
40
20
80
V
IN
=10 to 30V, I
O
=1A
V
IN
=10 to 30V, I
O
=1A
10
30
10
40
V
IN
=12V, I
O
=0.1 to 1.5A
V
IN
=20V, I
O
=0.1 to 1.5A
0.5
0.5
3.1
3.1
V
IN
=12V
V
IN
=20V
7
7
V
IN
=12V, I
O
=0A
V
IN
=20V, I
O
=0A
400
400
V
IN
=12V, V
ON/OFF
=0.3V
V
IN
=20V, V
ON/OFF
=0.3V
0.5
0.5
50
50
V
SSL
=0V
V
SSL
=0V
*1: Reference voltage for SPI-8010A
*3: Reference voltage temperature coeficient for SPI-8010A
*2: V
REF
for SPI-8010A
*4:
V
REF
/
T
a
for SPI-8010A
3
Pin Arrangement
1.AGND
2.N.C
3.DGND
4.CE/SS
5.Reg
6.N.C
7.SW
OUT
8.N.C
9.N.C
10.N.C
11.V
IN
12.B.S
13.N.C
14.C
omp
15.V
REF
(SPI-8010A)
V
OS
(SPI-8050A)
16.N.C
s
External Dimensions
(Unit: mm)
s
Block Diagram
a. Part Number Display
b. Lot Number (3 digits)
1st character
Year (last digit)
2nd character Month
Jan-Sep: Arabic numerals
Oct: O
Nov: N
Dec: D
3rd character Week
01-05: Arabic numerals
c. Administration Number (5 digits)
a
1
8
10.5
0.2
16
9
b
c
8010A
SK
16
9
(11)
12.2
0.2
1.27
0.25
0.4+0.15/-0.05
0.25+0.15/-0.05
(Remaining gate dimension not included.)
1
8
S
S
0.10
2.75MAX
2.5
0.2
2.0+0.2/-0.08
10.5
0.3
0.9
0.3
(2)
(4.5)
7.5
0.2
Part A
1+0.1/-0.05
(Fin thickness)
(Lead root from
the back)
1.35
0.2
0
0.1
0
8
Extended figure of Part A
CE/SS
UVLO
OCP
P.REG
OSC
PWM
LOGIC
CE/SS
TSD
Reg
Comp
GND
1V
Boot REG
DRIVE
BS
SW
OUT
V
REF
V
IN
+
-
+
-
Amp
SPI-8010A
SPI-8050A
CE/SS
UVLO
OCP
P.REG
OSC
PWM
LOGIC
CE/SS
TSD
Reg
Comp
GND
1V
Boot REG
DRIVE
BS
SW
OUT
V
S
V
IN
+
-
+
-
Amp
q
SPI-8000A Series
4
s
Standard External Circuit
C1: 220
F/63V
C2: 470
F/25V
C3: 0.1
F
C4: 1000pF
C5: 0.1
F
C6: 0.047
F
C7: 0.1
F
C8: 0.1
F
C9: 6800pF
R1: 47
L1: 47
H
D1: SPB-G56S
(Sanken)
SPI-8010A
SPI-8050A
Reg
CE/SS
5
3
4
V
IN
SW
OUT
V
REF
V
IN
GND
V
0
GND
11
C5
Comp
14
12
C6
C9
C3
D1
L1
R2
R3
I
REF
AGND
DGND
B.S
SPI-8010A
1
15
7
R1
C4
C1
C7
+
C2
C8
+
Reg
CE/SS
5
3
4
V
IN
SW
OUT
V
OS
V
IN
GND
V
0
GND
11
C5
Comp
14
12
C6
C3
D1
L1
AGND
DGND
B.S
SPI-8050A
1
15
7
R1
C4
C1
C7
+
C2
C8
+
q
SPI-8000A Series
Diode D1
The schottky-barrier diode must be used for D1. If other diodes like fast recovery diodes are used, IC may be destroyed because of the
reverse voltage applied by the recovery voltage or ON voltage.
Choke coil L1
If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that it is out of the rating.
As the overcurrent protection start current is approx. 2.5 A, attention must be paid to the heating of the choke coil by the magnetic
saturation due to overload or short-circulated load.
Capacitor C1, C2
As large ripple currents flow across C1 and C2, capacitors with high frequency and low impedance for SMPS must be used. Espe-
cially when the impedance of C2 is high, the switching waveform may not be normal at low temperature. Please use neither OS
capacitor nor tantalum capacitor which causes an abnormal oscillation for the C2.
In order to have optimum operating condition, each component must be laid out with the minimum distance.
5
s
T
a
-P
D
Characteristics
Note 1: The efficiency depends on the input voltage and the out-
put current. Thus, obtain the value from the efficiency
graph and substitute the percentage in the formula above.
Note 2: Thermal design for D
1
must be considered separately.
V
O
: Output voltage
V
IN
: Input voltage
I
O
: Output current
: Efficiency (%)
V
F
: Diode forward voltage
SPB-G56S0.4V(I
O
=2A)
3.00
2.50
2.00
1.50
1.00
0.50
0
30
0
25
50
75
100
125
Power Dissipation P
D
(W)
Ambient Temperature T
a
(
C)
j-a:62.5
C/W(0.84cm
2
)
j-a:47.6
C/W(8.64cm
2
)
j-a:41.7
C/W(30.8cm
2
)
s
Example of Pattern on PC Board
*For the optimum conditions, use one-point GND wiring centering on pin 1, and place each component as closely as possible.
SPI-8010A
C9
R2
R3
C6
C3
C2
C1
C7
C8
C4
+
+
V
IN
V
0
C5
R1
D1
L1
GND
C6
C3
C2
C1
C7
C8
C4
+
+
V
IN
V
0
C5
R1
D1
L1
GND
SPI-8050A
Recommended Pattern
Recommended Pattern
1pin
8pin
16pin
9pin
(0.4)
(0.87)
7.5
0.2
1.5
0.1
0.3
0.1
(11.1)
(4.5)
Recommended Land Pattern
q
SPI-8000A Series
P
D
=V
O
I
O
100
1
V
F
I
O
1
V
O
V
IN
6
s
Package Specification
Reel specifications
Dimension specifications : See the following diagram.
Reel specifications
: Static electricity resistant plastic reel
Carrier tape specifications: Number of embossment 1400 pcs. +
leader part and trailer part
Peel strength
: 0.1N to 0.7N at 300 mm/min
(Unit: mm)
Center of reel
Trailer part
IC implemented part
Leader part
Empty pocket
(400 mm or more)
Cover tape reel
(one round or more)
Drawer side
Empty pocket
(610 mm or more)
3
MAX
3
MAX
11.1
1.6
12.7
Placement
1pin
1.5
0.1
2
0.1
4
0.1
16
0.1
1.75
0.1
11.5
0.1
24.0
0.3
0.3
2.9
0.1
80
1
25.5
1.0
330
2
Core
q
SPI-8000A Series
7
Efficiency Characteristics
Output Voltage
Load Regulation
Overcurrent Protection Characteristics
Thermal Protection Characteristics
Temperature Characteristics
0
10
20
30
40
50
Input Voltage V
IN
(V)
100
90
80
70
60
50
Efficiency
(%)
1A
0.5A
I
O
=3A
0.5A
1A
I
O
=3A
0.5A
1A
I
O
=3A
V
O
=1.8V
V
O
=5V
V
O
=24V
T
a
=25
C
0
1
2
3
5
4
1.2
1.0
0.8
0.6
0.4
0.2
0
Output Current I
O
(A)
Output Voltage V
O
(V)
12V 20V 30V
V
IN
=8V
T
a
=25
C
0
2
4
6
10
8
1.2
1.0
0.8
0.6
0.4
0.2
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
I
O
=0.02A 1A 3A
*Load=C.R T
a
=25
C
0
1.0
2.0
3.0
1.03
1.02
1.01
1.00
0.99
0.98
0.97
Output Current I
O
(A)
Output Voltage V
O
(V)
V
IN
=8V
20V
12V
30V
T
a
=25
C
50
100
150
200
1.2
1.0
0.8
0.6
0.4
0.2
0
Output Voltage V
O
(V)
Ambient Temperature T
a
(
C)
TSD OFF
TSD ON
V
IN
=12V, I
O
=0.02A
50
0
50
150
100
300
250
200
150
100
50
1.015
1.01
1.005
1
0.995
0.99
Ambient Temperature T
a
(
C)
Frequency F
req
(kHz) Efficiency
(%)
Output Voltage V
O
(V)
V
O
Freq
V
IN
=12V, I
O
=1A
s
Typical characteristics (SPI-8010A)
q
SPI-8000A Series
8
Efficiency Characteristics
Output Voltage
Load Regulation
Overcurrent Protection Characteristics
Thermal Protection Characteristics
Temperature Characteristics
0
0.5
1.0
1.5
2.0
2.5
3.0
Output Current I
O
(A)
100
90
70
80
60
50
40
20
30
Efficiency
(%)
T
a
=25
C
V
IN
=8V
30V
20V
50V
0
1
2
3
6
5
4
6
5
4
3
2
1
0
Output Current I
O
(A)
Output Voltage V
O
(V)
20V 30V 50V
V
IN
=8V
T
a
=25
C
0
2
4
6
10
8
6
5
4
3
2
1
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
I
O
=0.02A 1A
3A
*Load=C.R T
a
=25
C
0
1.0
2.0
0.5
1.5
2.5
3.0
5.15
5.10
5.05
5.00
4.95
4.90
4.85
Output Current I
O
(A)
Output Voltage V
O
(V)
T
a
=25
C
V
IN
=8V
30V
20V
50V
50
100
150
200
6
5
4
3
2
1
0
Output Voltage V
O
(V)
Ambient Temperature T
a
(
C)
TSD OFF
TSD ON
V
IN
=20V, I
O
=0.02A
50
0
50
150
100
300
250
200
150
100
50
5.10
5.05
5.00
4.95
4.90
4.85
Ambient Temperature T
a
(
C)
Frequency F
req
(kHz) Efficiency
(%)
Output Voltage V
O
(V)
V
IN
=20V, I
O
=1A
V
O
f
OSC
s
Typical characteristics (SPI-8050A)
q
SPI-8000A Series
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