1-1-2 Switching Mode Regulator ICs
SPI-8000A Series
sFeatures
• Surface-mount 16 pin package
• Output current: 3.0A
Surface Mount, Separate Excitation Step-down Switching Mode Regulator ICs
sAbsolute
Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Thermal Resistance (junction to case)
Thermal Resistance (junction to ambient air)
Symbol
V
IN
P
D*1, *2
T
j
T
stg
Ratings
53
2.4
+125
–40 to +125
18
50
Unit
V
W
°C
°C
°C/W
°C/W
(T
a
=25°C)
• High efficiency: 91% (at V
IN
= 10V, l
O
= 1A, V
O
= 5V)
• Capable of downsizing a choke-coil due to
IC's high switching frequency (125kHz).
(Compared with conventional Sanken devices)
• The output-voltage-variable type can vary its
output voltage from 1V to 14V because of its
low reference voltage (Vref) of 1V.
• Wide Input Voltage Range (8 to 50V)
• Output ON/OFF available
• Built-in overcurrent and thermal protection
circuits
θ
j-c*2
θ
j-a*2
*1: Limited due to thermal protection.
*2: When mounted on glass-epoxy board 700cm
2
(copper laminate area 30.8cm
2
).
sApplications
• Onboard local power supplies
• OA equipment
• For stabilization of the secondary-side output voltage of switching power supplies
sRecommended
Operating Conditions
Ratings
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
SPI-8010A
(8 or V
o
+3)
*1
to 50
1 to 14
0.02 to 3.0
–30 to +125
–30 to +125
*1: The minimum value of an input voltage range is the higher of either 8V or V
O
+3V.
sElectrical
Characteristics
Rating
Parameter
Symbol
min.
Reference Voltage
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of
Reference Voltage
Overcurrent Protection
Starting Current
Quiescent Circuit Current
Circuit Current at Output OFF
CE/SS
Terminal
Low Level Voltage
Outflow Current at
Low Voltage
V
ADJ
Conditions
Eff
Conditions
F
OSC
Conditions
∆V
OLINE
Conditions
∆V
OLOAD
Conditions
∆V
ADJ
/∆T
a
I
S
Conditions
I
q
Conditions
I
q
(
off
)
Conditions
V
SSL
I
SSL
Conditions
V
SSL
=0V
V
IN
=12V, V
ON/OFF
=0.3V
0.5
50
3.1
V
IN
=12V
7
V
IN
=12V, I
O
=0A
400
0.97
SPI-8010A (Variable type)
typ.
1.00
V
IN
=12V, I
O
=1A
86
V
IN
=20V, I
O
=1A, V
O
=5V
250
V
IN
=12V, I
O
=1A
20
V
IN
=10 to 30V, I
O
=1A
10
V
IN
=12V, I
O
=0.1 to 1.5A
±0.5
30
40
max.
1.03
(T
a
=25°C)
Unit
V
%
kH
Z
mV
mV
mV/°C
A
mA
µ
A
V
µ
A
* Pin 4 is the CE/SS pin. Soft start at power on can be performed with a capacitor connected to
this pin. The output can also be turned ON/OFF with this pin. The output is stopped by setting
the voltage of this pin to V
SSL
or lower. CE/SS-pin voltage can be changed with an open-
collector drive circuit of a transistor. When using both the soft-start and ON/OFF functions
together, the discharge current from C
4
flows into the ON/OFF control transistor. Therefore,
limit the current securely to protect the transistor if C
3
capacitance is large.
The CE/SS pin is pulled up to the power supply in the IC, so applying the external voltage is
prohibited.
SPI-8000A
SPI-8000A
SPI-8000A
4 CE/SS
4 CE/SS
C4
4 CE/SS
C4
V
O.
ON/OFF
Soft start
Soft start
+V
O.
ON/OFF
56
ICs