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AMC34063A
www.addmtek.com DESCRIPTION The AMC34063A is designed for the applications which require DC - DC converters. It can be operated in a wide input range from 3.0V to 40V and has the controlled duty cycle oscillator, driver and high current output switch. Also, With the internal temperature compensation circuit, the AMC34063A provides an internally trimmed precision 2% reference voltage of 1.25V. These features make the AMC34063A suitable for step-up, step-down and voltage-inverting applications.
DC-DC CONVERTER CONTROL CIRCUITS
FEATURES Wide Input Operating Range: 3.0V to 40V Output Switch Current up to 1.5A 100KHz operational Frequency Low Standby Current Internally trimmed 2% 1.25V Reference Voltage Adjustable Output Voltage Available in 8 Pin Plastic DIP and 8 Pin S.O Packages Direct pin-to-pin replacement for industrial product MC34063A. PACKAGE PIN OUT
APPLICATIONS Chargers Adaptors Mother Board Scanner
SC SE Cap GND
1 2 3 4
8 7 6 5
DrC ISEN VCC VFB-
M
PACKAGE
(TOP VIEW)
SC SE Cap GND
1 2 3 4
8 7 6 5
DrC ISEN VCC VFB
DM
PACKAGE
(TOP VIEW)
TA (C) 0 to 70
Note:
ORDER INFORMATION Plastic DIP Plastic SO-8 M DM 8-pin 8-pin AMC34063AM (SnPb) AMC34063ADM (SnPb) AMC34063AMF (Lead Free) AMC34063ADMF (Lead Free)
Append the letter "T" to part number (i.e. AMC34063ADMT).
All surface-mount packages are available in Tape & Reel. The letter "F" is marked for Lead Free process.
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
ABSOLUTE MAXIMUM RATINGS Power Supply Voltage (VCC) ...............................................................................................40V Operating Junction temperature (M, DM Packages) .................................................................... 150 C Storage Temperature Range .................................................................................. -65C to 150C Lead temperature (Soldering, 10 seconds) .............................................................................300C
Note 1: Exceeding these ratings could cause damage to the device. negative out of the specified terminal. All voltages are with respect to Ground. Currents are positive into,
THERMAL DATA M PACKAGE: Power dissipation (PD), TA = 25 C Thermal Resistance-Junction to Ambient, JA DM PACKAGE: Power dissipation (PD), TA = 25 C Thermal Resistance-Junction to Ambient, JA BLOCK DIAGRAM 1.31W 95C /W 757mW 165C /W
SC 1 Q2 Q Q1 100 SE 2 R S
8 DrC
7 ISEN
CT Cap 3
Isen Oscillator 6 VCC
1.25V Reference
Gnd 4
5 VFB
Pin 1 Pin 2 Pin 3 Pin 4
: SC : SE : Cap : GND
PIN ASSIGNMENT DESCRIPTIONS - Switch Collector Pin 8 : DrC - Driver Collector - Switch Emitter Pin 7 : ISEN - I Peak Sense - Oscillator Timing Capacitor Pin 6 : VCC - Power Supply - Ground Pin 5 : VFB - Comparator inverting input
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Copyright (c) 2006 ADDtek Corp.
AMC34063A
RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Parameter Symbol Min. Typ. Max. VFB Comparator Input Voltage -0.3 to + 40 VC(switch) Switch Collector Voltage 40 VE(switch) Switch Emitter Voltage (VPin1=40V) 40 VCE(switch) Switch Collector to Emitter Voltage 40 VC(driver) Driver Collector Voltage 40 IC(driver) Driver Collector Current (Note 1) 100 ISW Switch Current 1.5 Timing Capacitor (connected to Cap pin) CT 1 Operating Ambient Temperature Range TA 0 to +70
Note 1: Maximum package power dissipation limits must be observed.
Units V V V V V mA A nF C
ELECTRICAL CHARACTERISTICS VCC=5.0 V, TA=0C to 70C, unless otherwise specified. Parameter OSCILLATOR Frequency Charge Current Discharge Current Discharge to Charge Current Ratio Current Limit Sense Voltage OUTPUT SWITCH Saturation Voltage, Darlington Connection Saturation Voltage DC Current Gain Collector OffState Current COMPARATOR Threshold Voltage Threshold Voltage Line Regulation Input Bias Current TOTAL DEVICE Supply current Symbol fosc Ichg Idischg Idischg/Ichg Vsense VCE(sat) VCE(sat) hFE IC(off) Vth Regline IIB Test Conditions VPin 5 = 0 V, CT = 1.0 nF, TA = 25C VCC = 5.0 V to 40 V, TA = 25C VCC = 5.0 V to 40 V, TA = 25C Pin 7 to VCC, TA = 25C Ichg = Idischg, TA = 25C ISW = 1.0 A, Pins 1, 8 connected ISW = 1.0 A, Rpin 8 =82 to VCC, Forced = 20 ISW = 1.0 A, VCE = 5.0 V, TA = 25C VCE = 40 V TA = 25C TA =0C to 70C VCC = 3.0 V to 40 V VFB = 0 V VCC = 5.0 V to 40 V, CT = 1.0nF, Pin 7 = VCC, VFB > Vth, Pin 2= GND, remaining pins open AMC34063A Min. Typ. Max. 24 24 140 5.2 250 50 1.225 1.21 33 35 220 6.5 300 1.0 0.45 75 0.01 1.25 1.4 -20 42 42 260 7.5 350 1.3 0.7 100 1.275 1.29 5.0 -400 Units KHz A A mV V V A
V mV nA
ICC
-
-
4.0
mA
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
CHARACTERIZATION CURVES
VCC = 25V, 500mA load CT = 470pF
23.3V
VCC = 5V, Pin 1, 5, 8 open CT = 1nF
- 0.8V
SE pin (PIN#2) waveform on 5V step down converter
Cap pin (PIN#3) waveform
VCC = 5V, Pin 1, 5, 8 open CT = 1nF
VCC = 5V, Pin 1, 5, 8 open CT = 1nF
Cap pin (PIN#3) waveform
Cap pin (PIN#3) waveform
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
Figure 1 - Step-Up Converter Application Circuits
170uH L 180 8 Q2 Q Q1 R 2 7 Rsc 0.22 V IN 12V 100uF S
1
CT 3
Isen Oscillator 6
1.25V Reference 1500pF 4 VOUT 28V/175mA 47K 5
Co
R1
330uF
R2
2.2K
Figure 2 - Step-Down Converter Application Circuit
1 Q2 Q Q1 R 2 L 220uH 1N5819 3 1.25V Reference 470pF 4 VOUT 5V/500mA 3.6K CT S
8
7 Rsc 0.33 V IN 25V 100uF
Isen Oscillator 6
5
R2
1.2K
Co
R1
470uF
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
Figure 3 - Voltage Inverting Converters
1 Q2 Q Q1 R 2 L 88uH 1N5819 3 1500pF 1.25V Reference CT S
8
7 Rsc 0.24 V IN 6 4.5V to 6.0V 100uF
Ipk Oscillator
4 V OUT -12V/100mA
953 3.6K
5
Co
1000uF
R2
1.2K 8.2K
R1
Note: For step-up, step-down or voltage inverting applications requiring peak current greater than 1.5A, external boost current circuitry by NPN or PNP transistors can be used.
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
Typical Design Reference Table:
Calculation ton/toff ton + toff toff ton CT Ipk(switch) RSC L(min) CO Step-Down Vout + VF Vin(min) - Vsat- Vout 1 f ton + toff ton/toff + 1 (ton + toff) - toff 4.0 x 10 ton
-5
Step-Up Vout + VF - Vin(min) Vin(min) - Vsat 1 f ton + toff ton/toff + 1 (ton + toff) - toff 4.0 x 10 ton
-5
Voltage-Inverting ?Vout? + VF Vin - Vsat 1 f ton + toff ton/toff + 1 (ton + toff) - toff 4.0 x 10-5 ton 2Iout(max) (ton/toff + 1) 0.3/Ipk(switch)
on(max)
2Iout(max) 0.3/Ipk(switch)
2Iout(max) (ton/toff + 1) 0.3/Ipk(switch)
( (V
in(min) -
Vsat- Vout) Ipk(switch)
)t
on(max)
( (V I
in(min) -
Vsat)
pk(switch)
)t
( (V I
in(min) -
Vsat)
pk(switch)
)t
on(max)
Ipk(switch)( ton + toff) 8Vripple(pp)
9
Iout ton Vripple(pp)
9
Iout ton Vripple(pp)
VF: Forward Voltage drop of the output rectifier Vsat: Saturation voltage of the output switch. The following power supply characteristics must be chosen: Vin - Nominal input voltage Vout - Desired output voltage, ?Vout? = 1.25(1 + R1/R2)
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.
Application concerns: To get the best regulation performance, Low ESR capacitors at Vout are suggested.
Copyright (c) 2006 ADDtek Corp.
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AMC34063A
PACKAGE
8-Pin Plastic DIP
8 5
B
INCHES MIN A B TYP MAX
MILLIMETERS MIN 9.02 6.10 1.27 0.20 2.92 TYP 9.27 6.35 0.46 1.52 2.54 3.30 7.62 BSC. 15 7 15 MAX 10.16 7.11 5.33 2.29 0.38 3.81
1
4
0.355 0.365 0.400 0.240 0.250 0.280 0.018 0.060 0.100 0.210 0.090 0.015
A
C D F
F
L
G
C
H 0.050 J 0.008
J M
K H G D
K L M
0.115 0.130 0.150 0.300 BSC. 7
Note: For 8-pin Plastic package, 60 units per tube
8-Pin Plastic S.O.I.C.
A
MIN A B 0.183 0.144 INCHES TYP MAX 0.202 0.163 0.074 0.020 0.035 MILLIMETERS MIN 4.65 3.66 1.35 0.25 0.38 TYP 1.27 BSC 0.19 0.13 4.80 5.79 0.25 0.25 5.21 8 6.20 MAX 5.13 4.14 1.88 0.51 0.89
B F
P
C 0.068 D 0.010 F 0.015
D
G L C
G J K
0.050 BSC 0.007 0.005 0.189 0.228 0.010 0.010 0.205 8 0.244
SEATING PLANE SEATING PLAN
K
M J
L M P
Copyright (c) 2006 ADDtek Corp.
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IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale.
ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196
Copyright (c) 2006 ADDtek Corp.
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