LM34063AQ8

Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 1/9
CYStech Electronics Corp.
DC-to-DC Converter Control Circuit
LM34063AQ8
Description
The LM34063AQ8 is a monolithic control circuit containing the primary functions required for
DC-to-DC converters. This device consists of an internal temperature compensated reference,
comparator, control- led duty cycle oscillator with an active current limit circuit, driver and high current
output switch.
Features
• 3V to 40V Input Voltage Operation
• Internal 1.6A Peak Current Switch
• Internal ±1.8% Reference
• Low Quiescent Current at 1.6mA
• Frequency Operation from 100Hz~100KHz
• Current Limiting
Applications
• Saver for Cellular Phone
• DC-DC Converter Module
Ordering Information
Device
LM34063AQ8
Package
SOP-8
(Pb-free lead plating package)
Shipping
2500 pcs / tape & reel, 3000 pcs/tape & reel
Typical Application Circuit
L1
200μH
Fig1.Saver Circuit for Cellular Phone
Vout
LM34063A
RSC
Vin
8
1
7
2
6
3
5
4
D1
1N5819
Cout
220μF
CT
470pF
RB
33kΩ
C1
100μF
RA
5.6kΩ
LM34063AQ8
CYStek Product Specification
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 2/9
CYStech Electronics Corp.
Pin Connections
8
7
6
5
1
2
3
4
Pin1:Switch Collector
Pin2:Switch Emitter
Pin3:Timing Capacitor
Pin4:Gnd
Pin5:Comparator Inverting Input
Pin6:Vcc
Pin7:Ipk Sense
Pin8:Driver Collector
Absolute Maximum Rating
Supply Voltage ....................................................................................................................................... 40 V
Comparator Input Voltage Range ........................................................................................... -0.3 V ~ 40 V
Switch Collector Voltage ....................................................................................................................... 40 V
Switch Emitter Voltage .......................................................................................................................... 40 V
Switch Collector to Emitter Voltage ...................................................................................................... 40 V
Driver Collector Voltage ........................................................................................................................ 40 V
Switch Current ....................................................................................................................................... 1.6A
Power Dissipation @ Ta=25°C......................................................................................................... 625 mW
Thermal Resistance Junction to Air............................................................................................. 160 °C / W
Operating Junction Temperature......................................................................................................... 125 °C
Operating Ambient Temperature Range......................................................................................... 0 ~ 70 °C
Storage Temperature Range.................................................................................................. -40 °C ~ 125 °C
Electrical Characteristics (Vcc=5V,Ta=25°C, unless otherwise specified)
Parameter
Oscillator
Frequency
Charging Current
Discharge Current
Voltage Amplitude
Discharge to Charge Current Ratio
Current Limit Sense Voltage
Output Switch
Saturation Voltage, Darlington
Connection
Saturation Voltage
DC Current Gain
Collector Off-State Current
Comparator
Threshold Voltage
Threshold Voltage Line Regulation
Input Bias Current
Supply Current
LM34063AQ8
Test Condition
Vpin 5=0V, CT=1nF
5.0V≤VCC≤40V
5.0V≤VCC≤40V
Pin3
VIPK(Sense) =VCC
IChg=Idischg
ISW=1.0A,
VC(Driver)=VC(Switch)
ISW=1.0A, IC(Driver)=50mA
(Forced β ≈ 20)
ISW=1.0A, VCE=5.0V
VCE=40V
0°C≤Ta≤70°C
3.0V≤VCC≤40V
VIN=0V
VIPK(Sence)=VCC
VPin5>VFB,
5.0V≤VCC≤40V
CT=1nF, Pin2=Gnd
Remaining pins open
Symbol
Min.
Typ.
Max.
Unit
fOSC
Ichg
Idischg
VOSC
IDischg/Ichg
VIPK(Sence)
30
30
180
5.2
250
38
38
240
0.6
6.5
300
45
45
290
7.5
350
kHz
μA
μA
V
mV
VCE(Sat)
-
1.0
1.3
V
VCE(Sat)
-
0.45
0.8
V
hFE
ICC(Off)
50
-
75
0.01
100
μA
VTH
Regline
IIB
ICC
1.225 1.250 1.275
1.210
1.290
1.4
5
-20 -400
-
1.6
4
V
mV
nA
mA
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 3/9
Block Diagram
SC
Pin1:1.6A Switch Collector
Q2
Q
Q1
DRI
Pin8:Driver Collector
S
R
80Ω
SE
Pin2:Darlington Switch Emitter
CT
IPK
Oscillator
TC
Pin3:Oscilletor Timing Capacitor
Comparator
1.25V
Reference Voltage
IPK
Pin7:Highside Current Sense
Input, VCC-VIPK=300mV
VCC
Pin6:Power Supply Input
+
-
GND
Pin4:Power GND
FB
Pin5:Feedback Comparator
Inverting Input
Application Information
Design Formula Table
Calculation
Step-Down
Step-Up
Voltage-Inverting
ton / toff
Vout+VF /
Vin(min) -Vsat-VOut
Vout+VF-Vin(min) /
Vin(min)-Vsat
|Vout| + VF /
Vin-Vsat
(ton + toff) max
1/Fmin
1/Fmin
1/Fmin
CT
4*10-5ton
4*10-5ton
4*10-5ton
IC(switch)
2*Iout(max)
2*Iout(max)(ton+toff/toff)
2*Iout(max)(ton+toff/toff)
RS
0.3 / IC(switch)
0.3 / IC(switch)
0.3 / IC(switch)
(Vin(min)-Vsat-Vout / IC(switch))
(Vin(min)-Vsat / IC(switch))
(Vin(min)-Vsat/ IC(switch))
*ton(max)
*ton(max)
*ton(max)
IC(switch)*(ton+toff) /
8VRipple(P-P)
Iout*ton / VRipple(P-P)
Iout*ton / VRipple(P-P)
L(min)
CO
Vsat : Saturation voltage of the output switch.
VF : Forward voltage drop of the ringback rectifier.
The following power supply characteristics must be chosen :
Vin : Nominal input voltage.
Vout : Desired output voltage. |Vout|=1.25*(1+RB/RA)
Iout - Desired output current
Fmin : Minimum desired output switching frequency at the selected values for Vin and Iout.
VRipple(P-P) : Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased
due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value
since it will directly effect the line and load regulation.
LM34063AQ8
CYStek Product Specification
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 4/9
CYStech Electronics Corp.
Application Information (Continued)
Fig.2 Step-Up Converter
R1
150Ω
L1
D1
200μH
LM34063A
1N5819
RSC
0.22Ω
Vin
C1
100μF
8
1
7
2
6
3
5
4
Vout
28V / 200mA
Cout
220μF
CT
680ρF
RB
47kΩ
RA
2.2kΩ
Line Regulation : 100mV (Vin=8V~16V, @Io=200mA)
Load Regulation : 5mV (Vin=12V, @Io=80mA~200mA)
Fig.3 Step-Up Converter With External NPN Switch
L1
R1
RSC
Vin
C1
Vout
D1
LM34063A
8
1
7
2
6
3
5
4
Q1
CT
Cout
R2
RB
RA
Fig.4 Step-Down Converter
L1
200μH
LM34063A
RSC
0.25Ω
Vin
C1
100μF
8
1
7
2
6
3
5
4
CT
470ρF
D1
1N5819
Vout
5V / 500mA
Cout
470μF
RB
3.6kΩ
RA
1.2kΩ
Line Regulation : 40mV (Vin=10V~20V, @Io=500mA)
Load Regulation : 5mV (Vin=15V, @Io=10mA~500mA)
Short Circuit Current : 1.3A (Vin=15V, @RL=0.1Ω)
LM34063AQ8
CYStek Product Specification
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 5/9
CYStech Electronics Corp.
Application Information (Continued)
Fig.5 Step-Down Converter With External PNP Saturation Switch
LM34063A
R1
R2
RSC
Vin
8
1
7
2
6
3
5
4
Q1
L1
CT
Vout
D1
Cout
RB
C1
RA
Fig.6 Voltage Inverting Converter
LM34063A
RSC
0.25Ω
Vin
4.5V-6V
8
1
7
2
6
3
5
4
C1
100μF
Vout
-12V / 100mA
D1
1N5819
L1
100μH
Cout
470μF
CT
680ρF
RA
953Ω
RB
8.2kΩ
Line Regulation : 20mV (Vin=4.5V~6V, @Io=100mA)
Load Regulation : 100mV (Vin=5V, @Io=10mA~100mA)
Fig.7 Voltage Inverting Converter With External PNP Saturation Switch
LM34063A
R1
RSC
Vin
8
1
7
2
6
3
5
4
RA
R2
Q1
L1
D1
CT
Vout
C1
RB
LM34063AQ8
Cout
CYStek Product Specification
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 6/9
CYStech Electronics Corp.
Characteristic Curves
Emitter Follower Configuration Output
Saturation Voltage vs Emitter Current
Output Switch On-Off Time vs Oscillator
Timing Capacitance
1.8
VCC=5.0V
Pin 7=VCC
Pin 5=GND
TA=25℃
100
Saturation Voltage---VCE(sat)(V)
Output Switch On-Off Time---ton-off(us
1000
ton
10
toff
1.6
1.5
VCC=5V
Pins 1,7,8=VCC
Pins 3,5=Gnd
TA=25℃
(See Note )
1.4
1.3
1.2
1.1
1
0.1
1
Oscillator Timing Capacitance---CT(nF)
0
10
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Emitter Current---IE(A)
Common Emitter Configuration Output Switch
Saturation Voltage vs Collector Current
1.1
1
0.9
Darlington Connection
0.8
VCC=5V
0.7
Pin 7=VCC
0.6
Pins 2,3,5=Gnd
TA=25℃
0.5
(See Note)
0.4
Forced β=20
0.3
0.2
0.1
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Collector Current---IC(A)
Current Limit Sense Voltage vs Temperature
Current Limit Sense Voltage---VIPK(V)
Saturation Voltage---VCE(sat)(V)
1
0.01
1.7
400
380
VCC=5.0V
Ichg=Idischg
360
340
320
300
280
260
240
220
200
-75
-50
-25
0
25
50
75
100 125
Ambient Temperature---TA(℃)
Standby Supply Current vs Supply Voltage
Note: Low duty cycle pulse techniques are used during test
to maintain junction temperature as close to ambient
temperature as possible.
3.6
Supply Current---I
CC(mA)
3.2
2.8
2.4
2
1.6
CT=10nF
Pin 7=VCC
Pin 2=Gnd
1.2
0.8
0.4
0
0
5
10
15
20
25
30
35
40
Supply Voltage---VCC(V)
LM34063AQ8
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 7/9
Reel Dimension
Carrier Tape Dimension
LM34063AQ8
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 8/9
Recommended wave soldering condition
Product
Pb-free devices
Peak Temperature
260 +0/-5 °C
Soldering Time
5 +1/-1 seconds
Recommended temperature profile for IR reflow
Profile feature
Average ramp-up rate
(Tsmax to Tp)
Preheat
−Temperature Min(TS min)
−Temperature Max(TS max)
−Time(ts min to ts max)
Time maintained above:
−Temperature (TL)
− Time (tL)
Peak Temperature(TP)
Time within 5°C of actual peak
temperature(tp)
Ramp down rate
Time 25 °C to peak
temperature
Sn-Pb eutectic Assembly
Pb-free Assembly
3°C/second max.
3°C/second max.
100°C
150°C
60-120 seconds
150°C
200°C
60-180 seconds
183°C
60-150 seconds
240 +0/-5 °C
217°C
60-150 seconds
260 +0/-5 °C
10-30 seconds
20-40 seconds
6°C/second max.
6°C/second max.
6 minutes max.
8 minutes max.
Note : All temperatures refer to topside of the package, measured on the package body surface.
LM34063AQ8
CYStek Product Specification
Spec. No. : C501Q8
Issued Date : 2003.03.21
Revised Date :2011.09.06
Page No. : 9/9
CYStech Electronics Corp.
SO-8 Dimension
Right side View
G
Top View
A
Marking:
I
C
B
Date Code
H
34063A
□□□□
J
E
D
K
Front View
Part A
Part A
M
L
N
O
F
8-Lead SO-8 Plastic Package
CYStek Package Code: Q8
*: Typical
Inches
Min.
Max.
0.1909
0.2007
0.1515
0.1555
0.2283
0.2441
0.0480
0.0519
0.0145
0.0185
0.1472
0.1527
0.0570
0.0649
0.1889
0.2007
DIM
A
B
C
D
E
F
G
H
Millimeters
Min.
Max.
4.85
5.10
3.85
3.95
5.80
6.20
1.22
1.32
0.37
0.47
3.74
3.88
1.45
1.65
4.80
5.10
DIM
I
J
K
L
M
N
O
Inches
Min.
Max.
0.0019
0.0078
0.0118
0.0275
0.0074
0.0098
0.0145
0.0204
0.0118
0.0197
0.0031
0.0051
0.0000
0.0059
Millimeters
Min.
Max.
0.05
0.20
0.30
0.70
0.19
0.25
0.37
0.52
0.30
0.50
0.08
0.13
0.00
0.15
Notes: 1.Controlling dimension: millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
• Lead: Pure tin plated.
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0.
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
• CYStek reserves the right to make changes to its products without notice.
• CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
LM34063AQ8
CYStek Product Specification