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AP34063
Universal DC/DC Converter Features
* * * * * * *
General 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.
Operation from 3.0V to 40V Input Low Standby Current Current Limiting Output Switch Current to 1.6A Output Voltage Adjustable Frequency Operation to 100 kHz Precision 2% Reference
Pin Connections
(Top View) Switch Collector Switch Emitter Timing Capacitor Gnd
1 2 3 4
8 7 6 5
Driver I pk Sense VCC Collector Comparator Inverting Input
Ordering Information
AP34063 X X X X
Temp. grade Blank: 0oC~70oC
Package
Lead Free
Packing
S8 : SOP-8L Blank : Normal Blank : Tube N8 : PDIP-8L L : Lead Free Package A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
Rev.A5 Feb.10, 2004 1/10
AP34063
Universal DC/DC Converter Maximum Ratings
Parameter Power Supply Voltage Comparator Input Voltage Range Switch Collector Voltage Switch Emitter Voltage(VPin 1 = 40V) Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Power Dissipation and PDIP: TA = 25C Thermal Characteristics Thermal Resistance SOP: TA = 25C Thermal Resistance Operating Junction Temperature Operating Ambient Temperature Range Storage Temperature Range
Notes: 2.ESD data available upon request.
Symbol VCC VIR VC(switch) VE(switch) VCE(switch) VC(driver) IC(driver) ISW PD JA PD RJA TJ TA Tstg
Value 40 -0.3 ~ +40 40 40 40 40 100 1.6 1.25 100 600 160 +150 0 ~ +70 -65 ~ +150
Unit V V V V V V mA A W C/W mW C/W C C C
1.Maximum package power dissipation limits must be observed.
Electrical Characteristics (VCC = 5.0V, unless otherwise specified.)
Characteristics OSCILLATOR Frequency(VPin 5 =0V, CT =1.0nF, TA =25C) Charge Current(VCC =5.0V to 40V, TA =25C) Discharge Current(VCC =5.0V to 40V, TA =25C) Discharge to Charge Current Ratio(Pin 7 to VCC, TA =25C) Current Limit Sense Voltage(Ichg = Idischg, TA =25C) OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection (ISW =1.0A, Pins 1,8 connected) Saturation Voltage, Darlington Connection (ISW =1.0A, ID = 50mA, Forced 20) DC Current Gain(ISW =1.0A, VCE =5.0V, TA =25C) Collector Off-State Current (VCE =40V) COMPARATOR Threshold Voltage TA = 25C T = 0oC ~ 75oC Threshold Voltage Line Regulation(VCC =3.0V to 40V) TOTAL DEVICE Supply Current(VCC =5.0V to 40V, CT =1.0nF, Pin 7 = VCC, VPin 5 > Vth Pin 2 = Gnd, remaining pins open) Symbol fosc Ichg Idischg Idischg / Ichg Vipk(sense) VCE(sat) VCE(sat) hFE IC(off) Vth
1.225 1.25
Min 24 24 140 5.2 300 50 -
Typ 33 30 200 6.5 400 1.0 0.45 75 0.01
Max 42 42 260 7.5 450 1.3 0.7 100
Unit kHz A A mV V V A V
Regline ICC
1.21 -
1.4 -
1.275 1.29 6.0 3.5
mV mA
Anachip Corp. www.anachip.com.tw 2/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter
Note: 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: IC output 10 IC driver - 7.0mA* *The 100 resistor in the emitter of the driver device requires about 7.0mA before the output switch conducts. Forced of output switch :
Representative Schematic Diagram
Drive Collector
8
1
Switch Collector
SQ R Ipk Sense 7 100
Q2 Q1 2 Switch Emitter
Ipk Oscillator 6 VCC
CT
Comparator + _ 1.25V Reference Regulator
3
Timing Capacitor
Comparator Inverting Input
5
4
Gnd
(Bottom View)
Anachip Corp. www.anachip.com.tw 3/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter
Figure 1. Vce(sat) versus le Vce(sat), Saturation Voltage (V)
1.4 1.26
Figure 2. Reference Voltage versus Temp.
1.2
Reference Voltage (V)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
1.255
1
1.25
0.8
1.245
0.6
1.24 0 10 20 30 40 50 60 70 80 90 100
Ie, Emitter Current (A)
Temperature (oC)
Figure 3. Current Limit Sense Voltage versus Temperature
440 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 10 20 30 40 50 60 70 80 90 100
Figure 4. Standby Supply Current versus Supply Voltage
Current Sense Voltage (mV)
420
400
380
360
340 320
Icc, Supply Current (mA)
Temperature
(oC)
0
5
10
15
20
25
30
35
40
Vcc, Supply Voltage (V)
Figure 5. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current ton-off, Output Switch On-Off Time(us)
1.8 1.75 Vcc=2~10V Pin1,7,8=Vcc Pin3,5=GND TA=25oC Pin2=5 10W
Figure 6.Output Switch On-Off Time versus Oscillator Timing Capacitor
1000
VCE ( sat), (V)
1.7 1.65 1.6 1.55 1.5 1.45 1.4 100
100
VCC = 5.0V Pin 7 = VCC Pin 5 = GND TA = 25oC
ton
10
t off
1
300
500
700
IE(mA)
900
1100
1300
1500
0.1 0.01
CT, Oscillator Timing Capacitor ( nF)
0.1
1
10
Anachip Corp. www.anachip.com.tw 4/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter Application Circuit
(1) Step-Up Converter
120uH L 8 180 SQ R 7 Q2 Q1 2 1N5819 Ipk Rsc 0.24 Vin 12V 6
+
1
CT Osc 3 VCC
+ _
470 uF
CT Comp. 1.25V Ref Reg 680 pF 4
5 R2 R1 10k 56k
Vout 28V/200mA 470uF
+
1.0uH Vout
+
CO
100
Optional Filter
Test Line Regulation Load Regulation Output Ripple Efficiency
Conditions Vin =9V to 12V, IO =200mA Vin =12V, IO =50mA to 200mA Vin =12V, IO =200mA Vin =12V, IO =200mA
Results 20mV = 0.035% 15mV = 0.035% 500mVPP 80%
Anachip Corp. www.anachip.com.tw 5/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter
(2) Step-Down Converter
8
1
SQ R 7
Q2 Q1 2
Ipk Rsc 0.11 Vin 25V 470 uF
+ + _
CT Osc 6 VC
C
1N5819
3 CT L Comp. 1.25V Ref Reg 470 pF 4 R2 Vout 5.0V/500mA 470uF
+
100uH
5
1.0uH Vout
+
R1
25k
36k
CO
100
Optional Filter
Test Line Regulation Load Regulation Output Ripple Efficiency
Conditions Vin =12V to 24V, IO =500mA Vin =24V, IO =50mA to 500mA Vin =24V, IO =500mA Vin =24V, IO =500mA
Results 20mV = 0.2% 5mV = 0.05% 160mVPP 82%
Anachip Corp. www.anachip.com.tw 6/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter
(3) Voltage Inverting Converter
8
1
SQ R 7
Q2 Q1 2 100 uH
Ipk Rsc 0.26 Vin 4.5V to 6.0V
+
L CT Osc
6
VC
C + _
3 1.25V Ref Reg
+
470uF
Comp.
680 pF
1N5819
5 R1 R2 50k 3k
4 Vout -12V/100mA 470uF
+
1.0uH Vout
+
CO
100
Optional Filter
Test Line Regulation Load Regulation Output Ripple Efficiency
Conditions Vin =4.5V to 6.0V, IO =100mA Vin =5.0V, IO =20mA to 100mA Vin =5.0V, IO =100mA Vin =5.0V, IO =100mA
Results 20mV = 0.08% 30mV = 0.12% 500mVPP 60%
Marking Information
( Top View) Logo Part Number AC AP34063 YY WW X X
Blank: normal L: Lead Free Package X : Internal code ( Optional) WW: Xth week: 01~52 YY : Year: "01"=2001 "02"=2002 ~
(SOP-8L / PDIP-8L)
Anachip Corp. www.anachip.com.tw 7/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter Package Dimension
(1) PDIP-8L
D
E-PIN O0.118 inch
E1
E 15 (4X) PIN #1 INDENT O0.025 DEEP 0.006-0.008 inch
7 (4X) eB A2 A
C
L
B S e B1 B2
Symbol A A1 A2 B B1 B2 C D E E1 e L eB S
Dimensions in millimeters Min. Nom. Max. 5.33 0.38 3.1 3.30 3.5 0.36 0.46 0.56 1.4 1.52 1.65 0.81 0.99 1.14 0.20 0.25 0.36 9.02 9.27 9.53 7.62 7.94 8.26 6.15 6.35 6.55 2.54 2.92 3.3 3.81 8.38 8.89 9.40 0.71 0.84 0.97
A1
Dimensions in inches Min. Nom. Max. 0.210 0.015 0.122 0.130 0.138 0.014 0.018 0.022 0.055 0.060 0.065 0.032 0.039 0.045 0.008 0.010 0.014 0.355 0.365 0.375 0.300 0.313 0.325 0.242 0.250 0.258 0.100 0.115 0.130 0.150 0.330 0.350 0.370 0.028 0.033 0.038
Anachip Corp. www.anachip.com.tw 8/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter
(2) SOP-8L
E
H
L VIEW "A"
D 7 (4X) A2 A
0.015x45
7 (4X)
A1
e
B y
C
VIEW "A"
Symbol A A1 A2 B C D E e H L y
Dimensions In Millimeters Min. Nom. Max. 1.40 1.60 1.75 0.10 0.25 1.30 1.45 1.50 0.33 0.41 0.51 0.19 0.20 0.25 4.80 5.05 5.30 3.70 3.90 4.10 1.27 5.79 5.99 6.20 0.38 0.71 1.27 0.10 8O 0O
Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 0O 8O
Anachip Corp. www.anachip.com.tw 9/10
Rev.A5 Feb.10, 2004
AP34063
Universal DC/DC Converter Design Formula Table
Calculation ton /toff (ton + toff) toff ton toff ton CT Ipk(switch) Rsc L(min) CO Step-Up Vout +VF -Vin(min) Vin(min) - Vsat 1/f ton +toff +1 Step-Down vout +vF vin(min) -vsat - vout 1/f ton +toff ton toff +1 Voltage-Inverting Ivout l+vF Vin -vsat 1/f ton +toff ton toff +1
(ton +toff)-toff 4.0x10-5ton 2Iout(max) (ton /toff +1) 0.3/Ipk(switch) (Vin(min) - Vsat ) Ipk(switch) 9 Iout ton Vripple(pp) ton(max)
(ton +toff)-toff 4.0x10-5ton 2Iout(max) 0.3/Ipk(switch) (Vin(min) - Vsat -Vout) Ipk(switch) Ipk(switch) (toff +ton ) 8Vripple(pp) ton(max) 9
(ton +toff)-toff 4.0x10-5ton 2Iout(max) (ton /toff +1) 0.3/Ipk(switch) (Vin(min) - Vsat ) Ipk(switch) Iout ton Vripple(pp) ton(max)
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.
Anachip Corp. www.anachip.com.tw 10/10
Rev.A5 Feb.10, 2004

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