TS34063
Dc to Dc Converter Controller
1/10
Version: B13
SO
P
-
8
-
8
General Description
TS34063 is a monolithic switching regulator and subsystem intended for use as DC to DC converter. It contains
an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active peak
current limit circuit, drive and a high current output switch. The TS34063 is specifically designed to be
incorporated in step-up, step-down and voltage inverting converter applications. TS34063 is offered in SOP-8 and
DIP-8 package
Features
● Power forward control circuit
● Operating voltage from 3V to 40V
● Low standby current
● Current limit adjustable
● Output switch current up to 1.5A
● Variable oscillator frequency up to 100kHz(max.)
● Output voltage adjustable
Pin Description
Name
Description
SC Switch Collector
SE Switch Emitter
CT Timing Capacitor
GND Ground
COMP. Comparator Inverting Input
V
CC
V
CC
Collector
I
PK
IPK Sense
V
DRIVER
Driver
Applications
● Charger
● xD-ROM, xDSL products
● DC to DC converter
Ordering Information
Part No. Package Packing
TS34063CD C3 DIP-8 50pcs / Tube
TS34063CS RL SOP-8 2.5Kpcs / 13” Reel
Absolute Maximum Rating
Parameter Symbol Maximum Unit
Supply Voltage V
CC
40 V
Comparator Input Voltage Range V
FB
- 0.3 ~ 40 V
Switch Collector Output Voltage V
C(SW)
40 V
Switch Emitter Voltage V
E(SW)
40 V
Switch Collector to Emitter Voltage V
CE(SW)
40 V
Driver Collector Voltage V
C(DRIVER)
40 V
Driver Collector Current (note 1) I
C(DRIVER)
100 mA
Output Switching Current I
SW
1.5 A
Power Dissipation DIP-8 P
D
1.0 W
SOP-8 0.5
Operating Ambient Temperature Range T
OPR
-40 ~ +85
o
C
Junction Temperature Range T
J
0 ~ +125
o
C
Storage Temperature Range T
STG
-65 ~ +150
o
C
Note: Maximum package power dissipation limits must be observed
Definition
:
1. SC 5. Comp
2. SE 6. Vcc
3. CT 7. Ipk
4. Gnd 8. Vdriver
TS34063
Dc to Dc Converter Controller
2/10
Version: B13
Electrical Characteristics
(V
CC
=5V, Ta =25
o
C; unless otherwise noted.)
Parameter Symbol
Test Conditions Min Typ Max
Unit
Oscillator (OSC)
Frequency F
OSC
C
T
= 1nF, Vpin5= 0V 24 33 42 KHz
Charge Current I
CHARGE
V
CC
= 5V ~ 40V 24 30 42 uA
Discharge Current I
DISCHARGE
V
CC
= 5V ~ 40V 140 200 260 uA
Discharge to Charge current ratio
I
DISCHARGE
/ I
CHARGE
Pin7 to V
CC
5.2 6.5 7.5 --
Current Limit Sense Voltage V
IPK(SENSE)
I
DISCHARGE
= I
CHARGE
250 -- 350 mV
Output switch (note1)
Saturation Voltage V
CE(SAT)
I
SW
= 1A, pin1, 8 connected
-- 1.0 1.3 V
Saturation Voltage V
CE(SAT)
I
SW
= 1A, Id=50mA -- 0.45 0.7 V
DC current gain H
FE
I
SW
= 1A, V
CE
= 0.5V 50 75 -- --
Collector off-state current I
C(OFF)
V
CE
= 40V -- 0.01 100 uA
Comparator
Threshold Voltage V
REF
1.225
1.25 1.275
V
Line regulation REG
LINE
V
CC
= 3V ~ 40V -- -- 6 mV
Total device
Supply Current I
CC
V
CC
= 5V ~ 40V, C
T
= 1nF,
pin7= V
CC
, pin5> V
TH
,
pin2=Gnd, remaining pins
open
-- 3 5 mA
Notes1: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
temperature as possible
Note 2: 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 2uS for it to come out of saturation. This
condition will shorten the off time at frequencies >= 30KHz, and is magnified at high temperature. 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: Forced Bata of
output switch: Ic output / (Ic driver – 7mA*) >= 10
* The 100ohm resistor in the emitter of the driver divide requires about 7mA before the output switch
conducts.
Block Diagram
TS34063
Dc to Dc Converter Controller
3/10
Version: B13
Electrical Characteristics Curve
Fig 1. Output Switch ON-OFF TIME vs.
Oscillator Timing Capacitor
Fig 2. Timing Capacitor Wave Form
Fig 3. Oscillator Frequency vs. Timing Capacitor
Fig 4. Standby Supply Current vs. Supply Voltage
Fig 5. Current Limit Sense Voltage vs. Temperature
TS34063
Dc to Dc Converter Controller
4/10
Version: B13
Typical Application Circuit
Test Conditions Results
Line Regulation V
IN
= 8V~16V, Io= 175mA 30mV = ± 0.05%
Load Regulation V
IN
= 12V, Io= 75mA to 175mA
10mV = ± 0.017%
Output Ripple V
IN
=12V, Io= 175mA 400mVpp
Efficiency V
IN
=12V, Io= 175mA 87.7%
Output Ripple with Optional Filter V
IN
=12V, Io= 175mA 40mVpp
Figure 7. Step Up Converter
TS34063
Dc to Dc Converter Controller
5/10
Version: B13
Typical Application Circuit (Continue)
Test Conditions Results
Line Regulation V
IN
= 15V~25V, Io= 500mA 12mV = ±12%
Load Regulation V
IN
= 25V, Io= 50mA to 500mA
3mV = ±0.03%
Output Ripple V
IN
=25V, Io= 500mA 120mVpp
Short Circuit Current V
IN
=25V, R
L
= 0.1mΩ 1.1A
Efficiency V
IN
=25V, Io= 500mA 83.7%
Output Ripple with Optional Filter V
IN
=25V, Io= 500mA 40mVpp
Figure 9. Step Down Converter
TS34063
Dc to Dc Converter Controller
6/10
Version: B13
Typical Application Circuit (Continue)
Test Conditions Results
Line Regulation V
IN
= 4.5V~6V, Io= 100mA 3mV = ±120.012%
Load Regulation V
IN
= 5V, Io= 10mA to 100mA 0.022V = ±0.09%
Output Ripple V
IN
=5V, Io= 100mA 500mVpp
Short Circuit Current V
IN
=5V, R
L
= 0.1Ω 910mA
Efficiency V
IN
=5V, Io= 100mA 62.2%
Output Ripple with Optional Filter V
IN
=5V, Io= 100mA 70mVpp
Figure 11. Voltage Inverting Converter
TS34063
Dc to Dc Converter Controller
7/10
Version: B13
Design Formula Table
Test Step Up Step Down Voltage Inverting
ton
toff
VsatVcc VinVfVout −
−
+
(min) (min)
Vout
Vsat
Vcc
VfVout
−
−
+
Vsat
Vcc
VfVout
−
+
||
( ton+ toff )
min
1
f
min
1
f
min
1
f
CT 4.0 x 10
–5
ton 4.0 x 10
–5
ton 4.0 x 10
–5
ton
Ipk(switch)
2Iout(max)
+1
toff
ton
2Iout(max) 2Iout(max)
+1
toff
ton
Rsc
)( 3.0
switchIpk
)( 3.0
switchIpk
)( 3.0
switchIpk
L(min)
)ton(
)Ipk(switch
Vsat)Vin( max*
min
−
(max)*
)(
(min) ton
switchIpk VoutVsatVin
−−
(max)*
)(
(min) ton
switchIpk VsatVin
−
Co
)(
*
9ppVrippletonIout
+)(8 ))(( ppVripple tofftonswitchIpk
)(
*
9ppVrippletonIout
Terms and Definitions
Vsat = Saturation Voltage of the output switch.
Vf
= Forward Voltage drop of the rectifier.
The following power supply characteristics must be chosen:
Vin= Normal input voltage
Vout: Desied Output voltage, |Vout| =1.25 (1+R2 / R1)
Iout : Desired output current.
fmin : Minimum desired output switching frequency at the selected values for Vin
and Io.
Vripple(p-p): 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.
TS34063
Dc to Dc Converter Controller
8/10
Version: B13
SOP-8 Mechanical Drawing
Marking Diagram
Y
=
Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
SOP-8 DIMENSION
DIM
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX.
A
4.80
5.00
0.189
0.196
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27BSC
0.05BSC
K
0.10
0.25
0.004
0.009
M
0º
7º
0º
7º
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
TS34063
Dc to Dc Converter Controller
9/10
Version: B13
DIP-8 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
DIP-8 DIMENSION
DIM
MILLIMETERS INCHES
MIN MAX MIN MAX
A 9.07 9.32 0.357 0.367
B 6.22 6.48 0.245 0.255
C 3.18 4.45 0.125 0.135
D 0.35 0.55 0.019 0.020
G 2.54 (typ) 0.10 (typ)
J 0.29 0.31 0.011 0.012
K 3.25 3.35 0.128 0.132
L 7.75 8.00 0.305 0.315
M - 10
o
- 10
o
TS34063
Dc to Dc Converter Controller
10/10
Version: B13
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to
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merchantability, or infringement of any patent, copyright, or other intellectual property right.
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