Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW34063
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
1.5A, DC/DC Switching Regulators
Features
General Description
Applications
The APW34063 is a monolithic control circuit con-
taining the primary functions required for DC-to-DC
converters. This device consists of an internal tem-
perature compensated reference, comparator, con-
trolled duty cycle oscillator with an active current limit
circuit, driver and high current output switch. This
device was specifically designed to be incorporated
in Step-Down and Step-Up and Voltage-Inverting ap-
plications with a minimum number of external
components.
Operation from 3.0V to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5A
Output Voltage Adjustable
Frequency Operation to 100kHz
Precision 2% Reference
SOP-8 and PDIP-8 packages
Lead Free Available (RoHS Compliant)
Pin Description
1
2
3
4
5
6
7
8
Switch
Collector
Timing
Capacitor
Switch
Emitter
GND
Comparator
Inverting
Input
V
CC
I
PK
Sense
Driver
Collector
A P W 3 4 0 6 3
Package Code
J : PDIP - 8 K : SOP-8
T e m p . R a n g e
C : 0 to 70 C
Handling Code
T U : T u b e T R : T a p e & R e e l
Lead Free Code
L : Lead Free Device Blank : Original Device
Handling Code
T e m p . R a n g e
P a c k a g e C o d e
A P W 3 4 0 6 3 J :
A P W 3 4 0 6 3
XXXXX
XXXXX - Date Code
A P W 3 4 0 6 3
XXXXX
A P W 3 4 0 6 3 K :
XXXXX - Date Code
Lead Free Code
Ordering and Marking Information
DC/DC Converters
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termina-
tion finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations.
ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classifica-
tion at lead-free peak reflow temperature.
Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW34063
www.anpec.com.tw
2
Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
V
CC
Power Supply Voltage
40
Vdc
V
IR
Comparator Input Voltage Range
-0.3 to +40
Vdc
V
C(Switch)
Switch Collector Voltage
40
Vdc
V
E(Switch)
Switch Emitter Voltage (V
PIN1
=40V)
40
Vdc
V
CE(Switch)
Switch Collector to Emitter Voltage
40
Vdc
V
C(driver)
Driver Collector Voltage
40
Vdc
I
C(driver)
Driver Collector Current
(Note1)
100
mA
I
SW
Switch Current
1.5
A
P
D
Power Dissipation
PDIP-8
SOP-8
1.25
625
W
mW
Block Diagram
S
Q
R
C
T
I
PK
Oscillator
Comparator
1.25V
Reference
Regulator
100
Q1
Q2
Driver
Collector
I
PK
Sense
V
C C
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
8
7
6
5
1
2
3
4
(Bottom View)
Note :
1. Maximum package power dissipation limits must be observed.
Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW34063
www.anpec.com.tw
3
Symbol
Parameter
Value
Unit
T
J
Operating Junction Temperature
+150
C
T
A
Operating Ambient Temperature Range
0 to +70
C
T
Stg
Storage Temperature Range
-65 to +150
C
Symbol
Parameter
Value
Unit
R
JA
Thermal Resistance
-
Junction to Ambient
PDIP-8
SOP-8
100
160
C/W
Electrical Characteristics
V
CC
=5.0V, T
A
=T
low
to T
high
(Note2)
, unless otherwise specified.
Thermal Characteristics
Absolute Maximum Ratings (Cont.)
APW34063
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Oscillator
F
OSC
Frequency
V
PIN5
=0V, C
T
=1.0nF, T
A
=25C
24
33
42
kHz
I
chg
Charge Current
V
CC
=5.0V to 40V, T
A
=25C
24
35
42
A
I
dischg
Discharge Current
V
CC
=5.0V to 40V, T
A
=25C
140
220
260
A
I
dischg
/I
chg
Discharge to Charge Current
Ratio
Pin7 to V
CC
, T
A
=25C
5.2
6.5
7.5
V
ipk(sense)
Current Limit Sense Voltage
I
chg
= I
dischg
, T
A
=25C
250
300
350
mV
Output Switch
(Note3)
Saturation Voltage, Darlington
Connection
I
SW
=1.0A, Pins 1,8 connected
1.0
1.3
V
CE(sat)
Saturation Voltage
(Note4)
I
SW
=1.0A, R
PIN8
=82
to V
CC,
Forced
=20
0.45
0.7
V
h
FE
DC Current Gain
I
SW
=1.0A, V
CE
=5.0V, T
A
=25C
50
75
I
C(off)
Collector Off-State Current
V
CE
=40V
0.01
100
Comparator
T
A
=25C
1.225
1.25
1.275
V
TH
Threshold Voltage
T
A
=T
low
to T
high
1.21
1.29
V
Reg
line
Threshold Voltage Line
Regulation
V
CC
=3.0V to 40V
1.4
5.0
mV
I
IB
Input bias Current
V
IN
=0V
-20
-400
nA
Total Device
I
CC
Supply Current
V
CC
=5.0V to 40V, C
T
=1.0nF,
Pin7= V
CC
, V
pin5
> V
IN
, Pin2=Gnd,
remaining pins open
4.0
mA
Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW34063
www.anpec.com.tw
4
Note :
2.T
low
=0CV, T
high
=+70C
3.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
temperature as possible.
4.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 2.0
s 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 :
Forced
of output switch :
I
C
output
I
C
driver - 7.0mA*
10
Electrical Characteristics
(Cont.)
* The 100
resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts.
Q
S
R
C
T
I
PK
Oscillator
Comp.
1.25V
Reference
Regulator
100
Q1
Q2
IN5819
8
7
6
5
1
2
3
4
180
V
IN
12V
R
SC
0.22
170
H
L
100
1500pF
R2
47k
R1
2.2k
330
C
O
V
OUT
28V/175mA
C
T
100
optional
Filter
V
OUT
1.0
H
Step-Up Converter
Typical Application Circuits
Copyright
ANPEC Electronics Corp.
Rev. A.3 - May., 2005
APW34063
www.anpec.com.tw
5
8
7
6
1
2
V
IN
R
SC
V
OUT
External Current Boost Connections for I
C
Peak Greater than 1.5A
8
7
6
1
2
V
IN
R
SC
V
OUT
R 0 for
constant V
IN
R
External NPN Switch
External NPN Saturated Switch (see Note5)
Note :
5.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 2.0
s 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.
Typical Application Circuits (Cont.)
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