1
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
FEATURES
Supply Voltage: 3V - 36V
Current Limiting
Output Switch Current to 1.5A
Adjustable Output Voltage
Operation frequency up to 110KHz
Low Quiescent Current
Precision 2% Reference
Available in 8 pin NSOIC Package
SP34063A
DESCRIPTION
The SP34063A is a monolithic switching regulator control circuit containing the primary
functions required for DC-DC converters. This device consists of an internal temperature
compensated reference, voltage comparator, controlled duty cycle oscillator with active
current limit circuit, driver and high current output switch. This device was specifically
designed to be used in buck, boost, and Voltage-Inverting applications with a minimum
number of external components. The SP34063A is available in 8 pin NSOIC package.
1.5A Buck/Boost/Inverting DC-DC Switching
Regulator
APPLICATIONS
Battery Charger Circuit
NICs/Switches/Hubs
ADSL Modems
Negative Voltage Power Supply
Now Available in Lead Free Packaging
TYPICAL APPLICATION CIRCUIT
1
2
3
4
5
6
7
8
8 PIN NSOIC
Switch
Collector
Switch
Emitter
Timing
Capacitor
V
CC
GND
Driver
Collector
I
PK
Sense
Comparator
Inverting Input
Advanced
S
Q
R
B
A
Ipk
OSC
CT
+
-
1.25V
Reference
Regulator
5
8
4
1
2
3
L2 1.0
H
VOUT
Optional
Filter
C3
100
F
C2
330
F
VOUT
28V/175mA
R1 47k
R2 2.2k
C1
100
F
V
IN
= 12V
RSC
0.22
R3 180
L1 150
H
D1
1N5819
+
6
7
CT
1500 pF
+
+
SP34063A
2
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated
in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions
for extended periods of time may affect reliability.
ABSOLUTE MAXIMUM RATINGS
r
e
t
e
m
a
r
a
P
l
o
b
m
y
S
e
u
l
a
V
t
i
n
U
e
g
a
t
l
o
V
y
l
p
p
u
S
r
e
w
o
P
V
C
C
0
4
V
e
g
n
a
R
e
g
a
t
l
o
V
t
u
p
n
I
r
o
t
a
r
a
p
m
o
C
V
R
I
0
4
o
t
3
.
0
-
V
e
g
a
t
l
o
V
r
o
t
c
e
ll
o
C
h
c
t
i
w
S
V
C
)
h
c
t
i
w
s
(
0
4
V
)
V
0
4
=
1
n
i
p
V
(
e
g
a
t
l
o
V
r
e
t
t
i
m
E
h
c
t
i
w
S
V
E
)
h
c
t
i
w
s
(
0
4
V
e
g
a
t
l
o
V
r
e
t
t
i
m
E
o
t
r
o
t
c
e
ll
o
C
h
c
t
i
w
S
V
E
C
)
h
c
t
i
w
s
(
0
4
V
e
g
a
t
l
o
V
r
o
t
c
e
ll
o
C
r
e
v
i
r
D
V
C
)
r
e
v
i
r
d
(
0
4
V
)
2
e
t
o
N
(
t
n
e
r
r
u
C
r
o
t
c
e
ll
o
C
r
e
v
i
r
D
I
C
)
r
e
v
i
r
d
(
0
0
1
A
m
t
n
e
r
r
u
C
h
c
t
i
w
S
I
W
S
5
.
1
A
e
g
a
k
c
a
P
C
I
O
S
N
r
o
f
s
c
i
t
s
i
r
e
t
c
a
r
a
h
C
l
a
m
r
e
h
T
d
n
a
n
o
i
t
a
p
i
s
s
i
D
r
e
w
o
P
T
(
n
o
i
t
a
p
i
s
s
i
D
r
e
w
o
P
A
)
C
5
2
=
P
D
5
2
6
W
m
e
c
n
a
t
s
i
s
e
R
l
a
m
r
e
h
T
R
A
J
0
6
1
W
/
C
e
r
u
t
a
r
e
p
m
e
T
n
o
i
t
c
n
u
J
g
n
i
t
a
r
e
p
O
T
J
0
5
1
C
e
g
n
a
R
e
r
u
t
a
r
e
p
m
e
T
e
g
a
r
o
t
S
T
G
T
S
0
5
1
o
t
5
6
-
C
)
l
e
d
o
M
y
d
o
B
n
a
m
u
H
(
D
S
E
-
0
0
0
2
V
3
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
Unless otherwise noted, the following specifications apply for V
CC
= +5.0V, T
A
= -40 to 85
C.
ELECTRICAL CHARACTERISTICS
I
C
Output
I
C
driver - 7.0mA*
*The 100
resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts
Forced
of output switch:
Note 1: Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient
temperature as possible.
Note 2: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (
300mA)
and high driver currents (
30mA), it may take up to 2.0s for it to come out of saturation. This condition will shorten the
off time at frequencies 30KHz, and is magnified at high temperatures. This condition does not occur with a Darlington
configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive
condition is recommended.
R
E
T
E
M
A
R
A
P
L
O
B
M
Y
S
.
N
I
M
.
P
Y
T
.
X
A
M
S
T
I
N
U
S
N
O
I
T
I
D
N
O
C
r
o
t
a
l
l
i
c
s
O
y
c
n
e
u
q
e
r
F
F
C
S
O
0
3
8
3
5
4
z
H
K
F
n
0
.
1
=
T
C
,
V
0
=
5
n
i
P
V
T
A
C
5
2
=
t
n
e
r
r
u
C
e
g
r
a
h
C
I
G
H
C
0
3
8
3
5
4
A
V
C
C
,
V
6
3
o
t
V
0
.
5
=
T
A
C
5
2
=
t
n
e
r
r
u
C
e
g
r
a
h
c
s
i
D
I
G
H
C
S
I
D
0
8
1
0
4
2
0
9
2
A
V
C
C
,
V
6
3
o
t
V
0
.
5
=
T
A
C
5
2
=
t
n
e
r
r
u
C
e
g
r
a
h
C
o
t
e
g
r
a
h
c
s
i
D
n
o
i
t
a
R
I
G
H
C
S
I
D
I
/
G
H
C
2
.
5
5
.
6
5
.
7
V
o
t
7
n
i
P
,
C
C
T
A
C
5
2
=
e
g
a
t
l
o
V
e
s
n
e
S
t
i
m
i
L
t
n
e
r
r
u
C
V
)
e
s
n
e
s
(
K
P
I
0
5
2
0
0
3
0
5
3
V
m
I
G
H
C
I
=
G
H
C
S
I
D
T
,
A
C
5
2
=
)
1
e
t
o
n
(
h
c
t
i
w
S
t
u
p
t
u
O
n
o
t
g
n
il
a
D
,
e
g
a
t
l
o
V
n
o
i
t
a
r
u
t
a
S
)
t
a
s
(
E
C
V
n
o
i
t
c
e
n
n
o
C
V
)
T
A
S
(
E
C
-
0
.
1
3
.
1
V
I
W
S
8
,
1
s
n
i
P
,
A
0
.
1
=
d
e
t
c
e
n
n
o
c
)
2
e
t
o
n
(
e
g
a
t
l
o
V
n
o
i
t
a
r
u
t
a
S
V
)
T
A
S
(
E
C
-
5
4
.
0
7
.
0
V
I
W
S
o
t
2
8
=
8
n
i
P
R
,
A
0
.
1
=
V
C
C
d
e
c
r
o
F
,
0
2
=
n
i
a
G
t
n
e
r
r
u
C
C
D
h
E
F
0
5
5
7
-
I
W
S
V
,
A
0
.
1
=
E
C
,
V
0
.
5
=
T
A
C
5
2
=
t
n
e
r
r
u
C
e
t
a
t
S
-
f
f
O
r
o
t
c
e
ll
o
C
I
C
)
f
f
o
(
-
1
0
.
0
0
0
1
A
V
E
C
V
6
3
=
r
o
t
a
r
a
p
m
o
C
e
g
a
t
l
o
V
d
l
o
h
s
e
r
h
T
V
H
T
5
2
2
.
1
0
5
2
.
1
5
7
2
.
1
V
T
A
C
5
2
=
1
2
.
1
0
5
2
.
1
9
2
.
1
T
A
C
5
8
o
t
C
0
4
-
=
e
n
i
L
e
g
a
t
l
o
V
d
l
o
h
s
e
r
h
T
n
o
i
t
a
l
u
g
e
R
R
E
N
I
L
G
E
4
.
1
5
V
m
V
C
C
V
6
3
o
t
V
0
.
3
=
t
n
e
r
r
u
C
s
a
i
B
t
u
p
n
I
I
B
I
0
2
-
0
0
4
-
A
n
V
N
I
V
0
=
e
c
i
v
e
D
l
a
t
o
T
t
n
e
r
r
u
C
y
l
p
p
u
S
I
C
C
4
A
m
V
C
C
=
T
C
,
V
6
3
o
t
V
0
.
5
=
,
F
n
0
.
1
V
=
7
n
i
P
C
C
V
>
5
n
i
P
V
,
H
T
10
4
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
BLOCK DIAGRAM
PIN DESCRIPTION
n
i
P
r
e
b
m
u
N
e
m
a
N
n
i
P
n
o
i
t
p
i
r
c
s
e
D
1
r
o
t
c
e
l
l
o
C
g
n
i
h
c
t
i
w
S
.
r
o
t
c
e
l
l
o
c
r
o
t
s
i
s
n
a
r
t
h
c
t
i
w
s
l
a
n
r
e
t
n
I
2
r
e
t
t
i
m
E
g
n
i
h
c
t
i
w
S
.
r
e
t
t
i
m
e
r
o
t
s
i
s
n
a
r
t
h
c
t
i
w
s
l
a
n
r
e
t
n
I
3
r
o
t
i
c
a
p
a
C
g
n
i
m
i
T
.
y
c
n
e
u
q
e
r
f
g
n
i
h
c
t
i
w
s
e
h
t
l
o
r
t
n
o
c
o
t
r
o
t
i
c
a
p
a
c
g
n
i
m
i
T
4
D
N
G
.
t
i
u
c
r
i
c
l
a
n
r
e
t
n
i
l
l
a
r
o
f
n
i
p
d
n
u
o
r
G
5
r
o
t
a
r
a
p
m
o
C
t
u
p
n
I
g
n
i
t
r
e
v
n
I
.
r
o
t
a
r
a
p
m
o
c
l
a
n
r
e
t
n
i
r
o
f
n
i
p
t
u
p
n
i
g
n
i
t
r
e
v
n
I
6
V
C
C
y
l
p
p
u
s
e
g
a
t
l
o
V
7
I
K
P
e
s
n
e
S
n
a
s
s
o
r
c
a
p
o
r
d
e
g
a
t
l
o
v
e
h
t
g
n
i
r
o
t
i
n
o
m
y
b
t
u
p
n
I
e
s
n
e
S
t
n
e
r
r
u
C
k
a
e
P
.
h
c
t
i
w
s
e
h
t
h
g
u
o
r
h
t
t
n
e
r
r
u
c
k
a
e
p
e
h
t
t
i
m
i
l
o
t
r
o
t
s
i
s
e
r
e
s
n
e
s
I
l
a
n
r
e
t
x
e
8
r
o
t
c
e
l
l
o
C
r
e
v
i
r
D
r
o
t
c
e
l
l
o
c
r
e
v
i
r
d
e
g
a
t
l
o
V
S
Q
R
B
A
OSC
CT
+
-
1.25V
Reference
Regulator
5
6
7
4
1
2
3
8
GND
Timing
Capacitor
Switch
Collector
Driver
Collector
Switch
Emitter
I
PK
I
PK
Sense
CC
V
Comparator
Inverting
Input
5
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
TYPICAL BOOST CONVERTER CIRCUIT
This is a typical boost converter configuration. In the steady state, if the resistor divider voltage at pin 5 is greater than
the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the output of the
comparator will go low. At the next switching period, the output switch will not conduct and the output voltage will
eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25. Then the output of the
comparator will go high, the output switch will be allowed to conduct. Since Vpin5 = V
OUT
*R2/(R1+R2) = 1.25(V), The
output voltage can be decided by V
OUT
= 1.25V*(R1+R2)/R2(V).
S
Q
R
B
A
Ipk
OSC
CT
+
-
1.25V
Reference
Regulator
5
8
4
1
2
3
L2 1.0
H
VOUT
Optional
Filter
C3
100
F
C2
330
F
VOUT
28V/175mA
R1 47k
R2 2.2k
C1
100
F
V
IN
= 12V
RSC
0.22
R3 180
L1 150
H
D1
1N5819
+
6
7
CT
1500 pF
+
+
SP34063A
6
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
This is a typical buck converter configuration. The working process in the steady state is similar to a boost converter,
Vpin5 = V
OUT
*R2/(R1+R2) = 1.25(V). The output voltage can be decided by V
OUT
= 1.25V*(R1+R2)/R2(V).
TYPICAL BUCK CONVERTER CIRCUIT
S
Q
R
B
A
Ipk
OSC
CT
+
-
1.25V
Reference
Regulator
5
7
8
4
1
2
3
L2 1.0
H
VOUT
Optional
Filter
C3
100
F
C2
470
F
VOUT
5V/100mA
R1 3.6k
R2 1.2k
C1
100
F
V
IN
= 25V
RSC
0.33
D1
1N5819
L1
220
H
+
+
+
6
CT
470 pF
SP34063A
7
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
TYPICAL INVERTING CONVERTER CIRCUIT
This is a typical boost converter configuration. The working process in the steady state is similar to a boost converter,
the difference in this situation is that the voltage at the non-inverting pin of the comparator is equal to 1.25V +V
OUT,
then Vpin5 = V
OUT
*R2/(R1+R2) = 1.25V, + V
OUT.
The output voltage can be decided by V
OUT
= -1.25V*(R1+R2)/R1
(V).
S
Q
R
B
A
Ipk
OSC
CT
+
-
1.25V
Reference
Regulator
5
7
8
4
1
2
3
L2 1.0
H
VOUT
Optional
Filter
C3
100
F
C2
1000
F
VOUT
-12V/100mA
R1 953k
R2 8.2k
C1
100
F
V
IN
= 4.5V - 6V
RSC
0.24
D1
1N5819
L1
88
H
+
+
+
6
CT
1500 pF
SP34063A
8
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
Figure 6. Common Emitter Configuration Output Switch
Saturation vs. Collector Current
Figure 1. Output Switch On-Off Time vs. Oscillator
Timing Capacitor
Figure 2. Timing Capacitor Waveform
Figure 3. Osillator Frequency vs. Timing Capacitor
TYPICAL PERFORMANCE CHARACTERISTICS
1.37
1.38
1.39
1.4
1.41
1.42
1.43
1.44
1.45
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Emitter Current (A)
Saturation Voltage (V)
V
CC
= 5V
PINS 1,7,8 = V
CC
PINS 3,5 = GND
T
A
= 25C
0
0.2
0.4
0.6
0.8
1
1.2
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6
Collector Current (A)
Saturation Voltage (V)
Darlington
Forced Beta = 20
V
CC
= 5V
PINS 7 = V
CC
PINS 2,3,5 = GND
T
A
= 25C
250
255
260
265
270
275
280
285
290
295
300
-50
0
50
100
150
Temperature
Current Limit Sense Voltage (mV)
0
0.5
1
1.5
2
2.5
3
3.5
0
5
10
15
20
25
30
35
40
Vcc Supply Voltage (V)
Icc Supply Current (mA)
C
T
= 1.0nF
PINS 7 = V
CC
PINS 2 = GND
Figure 7. Current Limit Sense Voltage vs. Tempera-
ture
Figure 4. Standard Supply Current vs. Supply Voltage
1
10
100
1000
10000
0.1
1
10
100
Oscillator Timing Capacitor (nF)
Ton-off Output Switch On-Off
Time (us)
toff
ton
V
CC
= 5V
PINS 7 = V
CC
PINS 5 = GND
T
A
= 25C
0.1
1
10
100
1000
0.1
1
10
100
CT, Oscillator Timing Capacitor (nF)
Frequency (kHz)
V
CC
= 5V
Pin7 = VCC
Pin5 = GND
T
A
= 25C
Figure 5. Emitter Follower Configuration Output
Switch Saturation vs. Emitter Current
V
CC
= 5V
C
T
= 1nF
T
A
= 25C
9
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
PACKAGE: 8 Pin NSOIC
A
A1
A2
SIDE VIEW
Seating Plane
SECTION B-B
WITH PLATING
SYMBOL
MIN
NOM
MAX
A
1.35
-
1.75
A1
0.1
-
0.25
A2
1.25
-
1.65
b
0.31
-
0.51
c
0.17
-
0.24
D
E
E1
e
L
0.4
-
1.27
L1
L2
0
-
8
1
5
-
15
Note: Dimensions in (mm)
8 Pin NSOIC JEDEC MO-012 (AA) Variation
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
1.04 REF
0.25 BSC
Gauge Plane
L1
L
1
Seating Plane
L2
VIEW C
TOP VIEW
b
SEE VIEW C
B
B
E
E/2
E1
INDEX AREA
(D/2 X E1/2)
E1/2
D
1
e
c
BASE METAL
b
10
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator Copyright 2005 Sipex Corporation
Part Number
Temperature Range
Package Types
SP34063AEN .................................................. -40
C to +85
C ................................................... 8-pin NSOIC
SP34063AEN/TR ............................................ -40
C to +85
C .................................................. 8-pin NSOIC
ORDERING INFORMATION
Corporation
ANALOG EXCELLENCE
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SP34063AEN/TR = standard; SP34063AEN-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 2,500 for NSOIC.
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