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AP34063
UNIVERSAL DC/DC CONVERTER
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 100 kHz Precision 2% Reference Lead Free packages: SOP-8L and PDIP-8L (Note 1) SOP-8L: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 2)
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.
Application Circuit
(1) Step-Up Converter
120uH L 8 180 SQ Q2 Q1 2 B240 Ipk Rsc 0.24 Vin 12V 6
+
1
R 7
CT Osc 3 VCC 470 uF
+ _
CT Comp. 1.25V Ref Reg 680 pF 4 Vout 28V/200mA 470uF
+
5
R2 R1 10k 56k CO
1.0uH Vout
+
100 Optional Filter
Test Line Regulation Load Regulation Output Ripple Efficiency
AP34063 Rev. 5 DS31004
Conditions Vin = 9V to 12V, IO = 200mA Vin = 12V, IO = 50mA to 200mA Vin = 12V, IO = 200mA Vin = 12V, IO = 200mA
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Results 20mV = 0.035% 15mV = 0.035% 500mVPP 80%
JULY 2009
(c) Diodes Incorporated
AP34063
UNIVERSAL DC/DC CONVERTER
Application Circuit
(2) Step-Down Converter
(Continued)
8
1
SQ R 7
Q2 Q1 2
Ipk Rsc 0.11 Vin 25V 470 uF
+ + _
CT Osc 6 VC
C
B240
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%
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AP34063
UNIVERSAL DC/DC CONVERTER
Application Circuit
(Continued)
(3) Voltage Inverting Converter
8
1
SQ
Q2 Q1 2
R 7
Ipk Rsc 0.26 Vin 4.5V to 6.0V
+
L CT Osc
100 uH
6 VC
C + _
3
+
470uF
Comp.
1.25V Ref Reg 4
680 pF
B240
5
R1 R2 50k 3k 470uF CO
Vout -12V/100mA
+
1.0uH Vout
+
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%
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Ordering Information
AP 34063 XX X - X
Package S8 : SOP-8L N8 : PDIP-8L
Lead Free L : Lead Free (Note 1) G : Green
Packing U : Tube 13 : Tape & Reel
Device
Lead-free
Package Code S8 S8 N8
Packaging (Note 3) SOP-8L SOP-8L PDIP-8L
AP34063S8L-13 AP34063S8G-13 AP34063N8L-U
Notes:
Tube 13" Tape and Reel Part Number Part Number Quantity Quantity Suffix Suffix NA NA 2500/Tape & Reel -13 NA NA 2500/Tape & Reel -13 60 -U NA NA
Lead-free
1. PDIP-8L is available in "Lead Free" product only. 2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
Pin Assignment
(1) SOP-8L (2) PDIP-8L
( Top View )
Switch Collector Switch Emitter Timing Capacitor Gnd
( Top View )
8 7 6 5
Driver I pk Sense VCC Collector Comparator Inverting Input
1 2 3 4
Switch Collector Switch Emitter Timing Capacitor Gnd
1 2 3 4
8 7 6 5
Driver I pk Sense VCC Collector Comparator Inverting Input
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Maximum Ratings
Symbol VCC VIR VC (switch) VE (switch) VCE (switch) VC (driver) IC (driver) ISW PD JA TMJ TOP Tstg
Notes:
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 Switch Current SOP: TA = 25C Power Dissipation and Thermal PDIP: TA = 25C Characteristics Thermal Resistance Maximum Junction Temperature Operating Junction Temperature Range Storage Temperature Range
Value 40 -0.3 ~ +40 40 40 40 40 100 1.6 600 1.25 160 +150 0 ~ +105 -65 ~ +150
Unit V V V V V V mA A mW W C/W C C C
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 Characteristics Min OSCILLATOR fosc 24 Frequency (VPin 5 = 0V, CT = 1.0nF, TA = 25C) 24 Ichg Charge Current (VCC = 5.0V to 40V, TA = 25C) Idischg 140 Discharge Current (VCC = 5.0V to 40V, TA = 25C) 5.2 Idischg / Ichg Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25C) Vipk (sense) 300 Current Limit Sense Voltage (Ichg = Idischg, TA = 25C) OUTPUT SWITCH (Note 3) Saturation Voltage, Darlington Connection VCE (sat) (ISW = 1.0A, Pins 1,8 connected) Saturation Voltage, Darlington Connection VCE (sat) (ISW = 1.0A, ID = 50mA, Forced 20) 50 hFE DC Current Gain (ISW = 1.0A, VCE = 5.0V, TA = 25C) IC (off) Collector Off-State Current (VCE = 40V) COMPARATOR Vth Threshold Voltage 1.225 TA = 25C o o TA = 0 C ~ 70 C 1.21 Regline 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 ICC 5 > Vth Pin 2 = Gnd, remaining pins open)
Typ. 33 30 200 6.5 400 1.0 0.45 75 0.01 1.25 1.4 -
Max 42 42 260 7.5 450 1.3 0.7 100 1.275 1.29 6.0 3.5
Unit kHz A A mV V V A V mV mA
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Representative Schematic Diagram
Drive Collector
8
1
Switch Collector
SQ
Q2 Q1 100 2 Switch Emitter
R Ipk Sense 7
Ipk Oscillator 6 VCC
CT
Comparator + _ 1.25V Reference Regulator
3
Timing Capacitor
Comparator Inverting Input
5
4
Gnd
(Bottom View)
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Typical Performance Characteristics
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
Figure 4. Standby Supply Current versus Supply Voltage
Current Sense Voltage (mV)
420
Icc, Supply Current (mA)
10 20 30 40 50 60 70 80 90 100
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 5 10 15 20 25 30 35 40
400
380
360
340 320 0
Temperature (oC)
Vcc, Supply Voltage (V)
Figure 5. Emitter Follower Configuration Output Saturation Voltage vs. Emitter Current
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 ton-off, Output Switch On-Off Time(us)
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
900
1100
1300
1500
IE(mA)
0.1 0.01
CT, Oscillator Timing Capacitor ( nF)
0.1
1
10
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Design Formula Table
Calculation ton / toff ( ton + toff ) Step-Up Vout + VF -Vin (min) Vin (min) - Vsat 1/f ton + toff toff ton toff ton CT Ipk (switch) Rsc L (min) ( 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) +1 Step-Down vout + vF vin(min) - vsat - vout 1/f ton + toff ton toff ( 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) +1 Voltage-Inverting Ivout l + vF Vin - vsat 1/f ton + toff ton toff ( 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) +1
CO
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.
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Marking Information
(1) SOP-8L
( Top View )
8 5
Logo Part No.
AP34063 YY WW X X
1 4
L : Lead Free G : Green Internal code Xth week = 01~52 Year : "08" = 2008 "09" = 2009
~
(2) PDIP-8L
( Top View )
8 5
Logo Part No.
AP34063 YY WW X X
1 4
L : Lead Free Internal code Xth week = 01~52 Year : "08" = 2008 "09" = 2009
~
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
Package Information
(1) SOP-8L
(All Dimensions in mm)
3.85/3.95
5.90/6.10
0.10/0.20
0.254 0.62/0.82
Gauge Plane Seating Plane
Detail "A"
7~9 1.30/1.50 1.75max. 0.15/0.25
0.35max. 45
7~9
Detail "A"
0/8
1.27typ 4.85/4.95
0.3/0.5
8x-0.60 5.4 6x-1.27 8x-1.55
Land Pattern Recommendation (Unit: mm)
(2) PDIP-8L
AP34063 Rev. 5 DS31004
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AP34063
UNIVERSAL DC/DC CONVERTER
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