TS34063AA
Dc to Dc Converter Controller
Pin assignment:
1. SC
2. SE
3. CT
4. Gnd
5. Comp.
6. Vcc
7. Ipk
8. Vdriver
Supply Voltage Range 3 V to 40V
Output Driving Current 1.5A
Oscillator Frequency up to 100KHz
General Description
The TS34063A 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 TS34063A is specifically designed to be incorporated in step-up, step-down and voltage inverting converter
applications.
The TS34063A is offered in SOP-8 and DIP-8 package.
Features
Power forward control circuit
Operating voltage form 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 Descriptions
Name
SC
SE
CT
Gnd
Comp.
Vcc
Ipk
Vdriver
Description
Switch Collector
Switch Emitter
Timing Capacitor
Ground
Comparator Inverting Input
Vcc Collector
Ipk Sense
Driver
Applications
Charger
xD-ROM, xDSL product
DC to DC converter s
Ordering Information
Part No.
TS34063ACD
TS34063ACS
Operating Temp.
(Ambient)
o
-20 ~ +85 C
Package
DIP-8
SOP-8
Block Diagram
TS34063A
1-8
2005/02 rev. A
Absolute Maximum Rating
Supply Voltage
Comparator Input Voltage Range
Switch Collector Output Voltage
Switch Emitter Voltage
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (note 1)
Output Switching Current
Power Dissipation
DIP-8
SOP-8
Operating Junction Temperature Range
Storage Temperature Range
V
CC
V
FB
V
C(SW)
V
E(SW)
V
CE(SW)
Vc(driver)
Ic(driver)
I
SW
Pd
T
J
T
STG
40
- 0.3 ~ 40
40
40
40
40
100
1.5
1.0
0.5
-0 ~ +125
-65 ~ +150
V
V
V
V
V
V
mA
A
W
o
o
C
C
Note: Maximum package power dissipation limits must be observed
Electrical Characteristics
(V
CC
=5V, Ta =25
o
C; unless otherwise specified.)
Parameter
Oscillator (OSC)
Frequency
Charge Current
Discharge Current
Discharge to Charge current ratio
Current Limit Sense Voltage
Output switch (note1)
Saturation Voltage
Saturation Voltage
DC current gain
Collector off-state current
Comparator
Threshold Voltae
Line regulation
Total device
V
CC
= 5V ~ 40V, C
T
= 1nF,
Supply Current
I
CC
pin7=Vcc, pin5>Vth,
pin2=Gnd, remaining pins
--
1.6
3
mA
V
REF
RegLine
V
CC
= 3V ~ 40V
1.225
--
1.25
--
1.275
6
V
mV
V
CE(SAT)
V
CE(SAT)
H
FE
I
C(OFF)
I
SW
= 1A, pin1,8 connected)
I
SW
= 1A, Id=50mA
I
SW
= 1A, Vce= 0.5V
Vce= 40V
--
--
--
--
1.0
0.45
75
0.01
1.3
0.7
--
100
V
V
--
uA
F
OSC
I
CHARGE
I
DISCHARGE
I
DISCHARGE
/ I
CHARGE
V
IPK(SENSE)
C
T
= 1nF, Vpin5= 0V
V
CC
= 5V ~ 40V
V
CC
= 5V ~ 40V
Pin7 to Vcc
I
DISCHARGE
= I
CHARGE
24
--
--
--
250
33
30
200
6.5
--
42
--
--
--
350
KHz
uA
uA
--
mV
Symbol
Test Conditions
Min
Typ
Max
Unit
open
Note: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient
temperature as possible
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.
TS34063A
2-8
2005/02 rev. A
Circuit Description
TS34063A
3-8
2005/02 rev. A
Typical Application Circuit
Figure 7. Step Up Converter
Test
LINE REGULATION
Load Regulation
Output Ripple
Efficiency
Output Ripple with Optional Filter
Conditions
Vin= 8V~16V, Io= 175mA
Vin= 12V, Io= 75mA to 175mA
Vin=12V, Io= 175mA
Vin=12V, Io= 175mA
Vin=12V, Io= 175mA
Results
30mV +/- 0.05%
10mV +/- 0.017%
400mVpp
87.7%
40mVpp
TS34063A
4-8
2005/02 rev. A
Typical Application Circuit (continues)
Figure 9. Step Down Converter
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple with Optional Filter
Conditions
Vin= 15V~25V, Io= 500mA
Vin= 25V, Io= 50mA to 500mA
Vin= 25V, Io= 500mA
Vin= 25V, RL= 0.1ohm
Vin= 25V, Io= 500mA
Vin= 25V, Io= 500mA
Results
12mV +/- 0.12%
3mV +/- 0.03%
120mVpp
1.1A
83.7%
40mVpp
TS34063A
5-8
2005/02 rev. A
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