AP34063
Document number: DS31004 Rev. 8 - 3
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AP34063
UNIVERSAL DC/DC CONVERTER
Description
The AP34063 Series is a monolithic control circuit containing the
primary functions required for DC-to-DC converters. These devices
consist of an internal temperature compensated reference,
comparator, controlled duty cycle oscillator with an active current limit
circuit, driver and high current output switch. This series is specifically
designed for incorporating in Step-Down and Step-Up and Voltage-
Inverting applications with a minimum number of external
components.
Features
Operation from 3.0V to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.6A
Output Voltage Adjustable
Frequency Operation to 100kHz
Precision 2% Reference
PDIP-8 and SO-8 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
SO-8
1
2
3
4
8
7
6
5
VCC
Comparator
Inverting
Input
Drive
Collector
Ipk
Sense
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
( Top View )
PDIP-8
1
2
3
4
8
7
6
5
VCC
Comparator
Inverting
Input
Ipk
Sense
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
( Top View )
Drive
Collector
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP34063
Document number: DS31004 Rev. 8 - 3
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AP34063
Typical Applications Circuit
(1) Step-Up Converter
1.25V
Ref
Reg
Ipk CT
R
S Q Q2
Q1
Comp.
+
_
8
7
6
5
1
2
3
4
VCC
Osc
180
+
470mF
VIN
12V
Rsc
0.24
R1 10k 56k
R2
+CO
28V/200mA
VOUT
+100
VOUT
Optional Filter
L
120mH
CT
680pF
B240
470mF
1.0mH
Switch Collector
Switch Emitter
Timing
Capacitor
Gnd
Comparator
Inverting
Input
Ipk Sense
Drive Collector
Test
Conditions
Results
Line Regulation
VIN = 9V to 12V, IO = 200mA
20mV = ±0.035%
Load Regulation
VIN = 12V, IO = 50mA to 200mA
15mV = ±0.035%
Output Ripple
VIN = 12V, IO = 200mA
500mVPP
Efficiency
VIN = 12V, IO = 200mA
80%
AP34063
Document number: DS31004 Rev. 8 - 3
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AP34063
Typical Applications Circuit (Cont.)
(2) Step-Down Converter
1.25V
Ref
Reg
Ipk CT
R
SQQ2
Q1
Comp.
+
_
8
7
6
5
1
2
3
4
Osc
+
470mF
VIN
25V
Rsc
0.11
R1 25k 36k
R2
+CO
5.0V/500mA
VOUT
+
100
VOUT
Optional Filter
CT
470pF
L100mH
B240
470mF
1.0mH
VCC
Switch Collector
Switch Emitter
Timing
Capacitor
Gnd
Comparator
Inverting
Input
Ipk Sense
Drive Collector
Test
Conditions
Results
Line Regulation
VIN = 12V to 24V, IO = 500mA
20mV = ±0.2%
Load Regulation
VIN = 24V, IO = 50mA to 500mA
5mV = ±0.05%
Output Ripple
VIN = 24V, IO = 500mA
160mVPP
Efficiency
VIN = 24V, IO = 500mA
82%
AP34063
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AP34063
Typical Applications Circuit (Cont.)
(3) Voltage Inverting Converter
1.25V
Ref
Reg
Ipk CT
R
S Q Q2
Q1
Comp.
+
_
8
7
6
5
1
2
3
4
Osc
+
470mF
VIN
4.5V to 6.0V
Rsc
0.26
R2 50k 3k
R1
CO
-12V/100mA
VOUT
100VOUT
Optional Filter
680pF
L
B240
470mF
1.0mH
+
100mH
+ +
VCC
Switch Collector
Switch Emitter
Timing
Capacitor
Gnd
Comparator
Inverting
Input
Ipk Sense
Drive Collector
Test
Conditions
Results
Line Regulation
VIN = 4.5V to 6.0V, IO = 100mA
20mV = ±0.08%
Load Regulation
VIN = 5.0V, IO = 20mA to 100mA
30mV = ±0.12%
Output Ripple
VIN = 5.0V, IO = 100mA
500mVPP
Efficiency
VIN = 5.0V, IO = 100mA
60%
AP34063
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AP34063
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional
operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to
absolute maximum rating conditions for extended periods of time.
Symbol
Parameter
Value
Unit
VCC
Power Supply Voltage
40
V
VCIIR
Comparator Inverting Input Voltage Range
-0.3 to +40
V
VC(SWITCH)
Switch Collector Voltage
40
V
VE(SWITCH)
Switch Emitter Voltage (VPIN 1 = 40V)
40
V
VCE(SWITCH)
Switch Collector to Emitter Voltage
40
V
VC(DRIVER)
Driver Collector Voltage
40
V
IC(DRIVER)
Driver Collector Current
100
mA
ISW
Switch Current
1.6
A
PD
Power Dissipation (Note 4)
SO-8: TA = +25°C
600
mW
PDIP-8: TA = +25°C
1.25
W
JA
Thermal Resistance
SO-8
117
°C /W
PDIP-8
138
JC
SO-8
19
PDIP-8
25
TMJ
Maximum Junction Temperature (Note 5)
+150
°C
TOP
Operating Junction Temperature Range
0 to +105
°C
Tstg
Storage Temperature Range
-65 to +150
°C
Notes: 4. Maximum package power dissipation limits must be observed.
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.
Electrical Characteristics (VCC = 5.0V, unless otherwise specified.)
Symbol
Parameter
Min
Typ
Max
Unit
OSCILLATOR
fOSC
Frequency (VPIN 5 = 0V, CT = 1.0ηF, TA = +25°C)
24
33
42
kHz
ICHG
Charge Current (VCC = 5.0V to 40V, TA = +25°C)
24
30
42
µA
IDISCHG
Discharge Current (VCC = 5.0V to 40V, TA = +25°C)
140
200
260
µA
IDISCHG / ICHG
Discharge to Charge Current Ratio (Pin 7 to VCC, TA = +25°C)
5.2
6.5
7.5
—
Vipk (SENSE)
Current Limit Sense Voltage (ICHG = IDISCHG, TA = +25°C)
300
400
450
mV
OUTPUT SWITCH
VCE(sat)
Saturation Voltage, Darlington Connection
(ISW = 1.0A, Pins 1, 8 connected)
—
1.0
1.3
V
VCE(sat)
Saturation Voltage, Darlington Connection
(ISW = 1.0A, ID = 50mA, Forced β 20)
—
0.45
0.7
V
hFE
DC Current Gain (ISW = 1.0A, VCE = 5.0V, TA = +25°C)
50
75
—
—
IC(off)
Collector Off-State Current (VCE = 40V)
—
0.01
100
µA
COMPARATOR
VTH
Threshold Voltage
TA = +25°C
1.225
1.25
1.275
V
TA = 0°C to +70°C
1.21
—
1.29
V
RegLINE
Threshold Voltage Line Regulation (VCC = 3.0V to 40V)
—
1.4
6.0
mV
TOTAL DEVICE
ICC
Supply Current (VCC = 5.0V to 40V, CT =1.0ηF, Pin 7 = VCC,
VPIN 5 > VTH Pin 2 = Gnd, remaining pins open)
—
—
3.5
mA
AP34063
Document number: DS31004 Rev. 8 - 3
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AP34063
Representative Schematic Diagram
1.25V
Reference
Regulator
Ipk
Oscillator CT
R
S Q Q2
Q1
100
Comparator
+
_
(Bottom View)
8
7
6
5
1
2
3
4Gnd
Timing
Capacitor
Switch
Emitter
Switch
Collector
Drive
Collector
I
pk
Sense
V
CC
Comparator
Inverting
Input
AP34063
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AP34063
Typical Performance Characteristics
Figure 1.VCE(sat) versus IE
0.6
0.8
1
1.2
1.4
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
IE, Emitter Current (A)
VCE(sat), Saturation Voltage (V)
1.24
1.245
1.25
1.255
1.26
0 10 20 30 40 50 60 70 80 90 100
Temperature ( oC)
Reference Voltage (V)
Figure 2. Reference Voltage versus Temp.
Figure 4. Standby Supply Current
versus Supply Voltage
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0 5 10 15 20 25 30 35 40
Vcc, Supply Voltage (V)
Icc, Supply Current (mA)
1.4
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
100 300 500 700 900 1100 1300 1500
IE( mA)
VCE (sat) (V)
Figure 5. Emitter Follower Configuration
Output Saturation Voltage vs. Emitter Current
0.1
1
10
100
1000
0.01 0.1 1 10
CT, Oscillator Timing Capacitor ( nF)
ton-off
, Output Switch On-Off Time (ms)
Figure 6.Output Switch On-Off Time versus
Oscillator Timing Capacitor
VCC = 5.0V
Pin 7 = VCC
Pin 5 = GND
TA = 25oC
tON
tOFF
Vcc=2~10V
Pin1,7,8=Vcc
Pin3,5=GND
TA=25oC
Pin2=5
Figure 3. Current Limit Sense Voltage
versus Temperature
320
340
360
380
400
420
440
0 10 20 30 40 50 60 70 80 90 100
Temperature (oC)
Current Sense Voltage (mV)
10W
AP34063
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AP34063
Design Formula Table
Calculation
Step-Up
Step-Down
Voltage-Inverting
tON / tOFF
VOUT + VF –VIN(MIN)
VOUT + VF
I VOUT l + VF
VIN(MIN) – VSAT
VIN(MIN) – VSAT – vOUT
VIN(MIN) – VSAT
( tON + tOFF )
1/f
1/f
1/f
tOFF
tON + tOFF
tON + tOFF
tON + tOFF
tON
+1
tON
+1
tON
+1
tOFF
tOFF
tOFF
tON
( tON +tOFF ) – tOFF
( tON +tOFF ) – tOFF
( tON +tOFF ) – tOFF
CT
4.0 10-5
tON
4.0 10-5
tON
4.0 10-5
tON
IPK (Switch)
2IOUT(MAX) (tON / tOFF +1)
2IOUT(MAX)
2IOUT(MAX) (tON / tOFF +1)
RSC
0.3 / IPK (SWITCH)
0.3 / IPK (SWITCH)
0.3 / IPK (SWITCH)
L (MIN)
( VIN(MIN) – VSAT )
tON(MAX)
(VIN(MIN) – VSAT – VOUT)
tON(MAX)
( VIN(MIN) – VSAT )
tON(MAX)
IPK (SWITCH)
IPK (SWITCH)
IPK (SWITCH)
CO
9
IOUT tON
IPK (SWITCH) (tON + tOFF)
9
IOUT tON
VRIPPLE (pp)
8VRIPPLE (pp)
VRIPPLE (pp)
VSAT = Saturation voltage of the output switch.
VF = Forward voltage drop of the output rectifier.
The following power supply characteristics must be chosen:
VIN - Nominal input voltage.
VOUT - Desired output voltage, |VOUT| = 1.25 (1+R2/R1)
IOUT - Desired output current.
FMIN - Minimum desired output switching frequency at the selected values of VIN and IO.
VRIPPLE(pp) - Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its
equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the line and
load regulation.
Ordering Information
Package Packing
Green
G : Green
S8 : SO-8 13 : Tape & Reel
AP34063 XX X - X
Device
Package Code
Package
(Note 7)
Green
Quantity
Part Number Suffix
Status
(Note 6)
Tube
13” Tape and
Reel
AP34063S8G-13
S8
SO-8
Green
2500
NA
-13
In production
Notes: 6. All Lead-free versions in SO-8 and PDIP-8 are End of Life (EOL) with no replacement.
7. For packaging details, go to our website at https://www.diodes.com/design/support/packaging/diodes-packaging/.
AP34063
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AP34063
Marking Information (Note 6)
(1) SO-8
( Top View )
AP34063
YY WW
X X
Logo
Part No.Internal code
Year : "08" = 2008
"09" = 2009
Xth week = 01~52
~
5
8
41
G : Green
L : Lead Free
(2) PDIP-8
( Top View )
AP34063
YY WW
X X
Logo
Part No.Internal code
Year : "08" = 2008
"09" = 2009
Xth week = 01~52
~
5
8
41
L : Lead Free
AP34063
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AP34063
Package Outline Dimensions (All dimensions in mm.)
Please see http://www.diodes.com/package-outlines.html for the latest version.
(1) SO-8
1
b
e
E
A
A1
9° (All sides)
4°± 3°
c
Q
h
45°
R 0.1
7°
D
E0
E1
L
Seating Plane
Gauge Plane
SO-8
Dim
Min
Max
Typ
A
1.40
1.50
1.5
A
0.10
0.20
0.15
b
0.30
0.50
0.40
c
0.15
0.25
0.20
D
.85
4.95
4.90
E
5.90
6.10
6.00
E1
3.80
3.90
3.85
E0
3.85
3.95
3.90
e
--
--
1.27
h
-
--
0.35
L
0.62
0.82
0.72
Q
0.60
0.70
0.65
All Dimensions in mm
(2) PDIP-8
PDIP-8
Dim
Min
Max
A
9.02
9.53
B
6.15
6.35
C
3.10
3.50
D
0.36
0.56
F
1.40
1.65
G
2.54 typ.
H
0.71
0.97
J
0.20
0.36
K
2.92
3.81
L
7.62
8.26
M

15°
N
0.38 (min)
All Dimensions in mm
A
B
H
G
F
D
N
K
C
L
M
J
NOT RECOMMENDED FOR NEW DESIGN
USE AZ34063U
AP34063
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AP34063
Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
(1) SO-8
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2018, Diodes Incorporated
www.diodes.com
Dimensions
Value (in mm)
C
1.27
X
0.802
X1
4.612
Y
1.505
Y1
6.50
CX
Y
Y1
X1