Preliminary Datasheet
0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
General Description
The AZ34063C is a monolithic switching regulator
control circuit containing the primary functions
required for DC-DC converters. This device consists
of internal temperature compensated reference, voltage
comparator, controlled duty cycle oscillator with active
current limit circuit, driver and high current output
switch. This device is specifically designed to be
used in Step-Down, Step-Up and Voltage-Inverting
applications with a minimum number of external com-
ponents.
The AZ34063C is the enhanced version of AZ34063
with the ability to work in higher frequency.
The AZ34063C is available in 2 packages: SOIC-8 and
DIP-8.
AZ34063C
Features
•
•
•
•
•
•
•
Operation from 3.0V to 36V Input
Low Standby Current
Current Limiting
Output Switch Current to 0.8A
Output Voltage Adjustable
Operation Frequency up to 180KHz (CT=100pF)
Precision 2% Reference
Applications
Battery Chargers
NICs/ Switches/ Hubs
ADSL Modems
Negative Voltage Power Supplies
SOIC-8
DIP-8
Figure 1. Package Types of AZ34063C
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Pin Configuration
AZ34063C
P/M Package
(DIP-8/SOIC-8)
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
1
2
3
4
8
7
6
5
Driver
Collector
I
PK
Sense
V
CC
Comparator
Inverting Input
Top View
Figure 2. Pin Configuration of AZ34063C
Functional Block Diagram
Driver
Collector
1
Switch
Collector
I
PK
Sense
Switch
Emitter
V
CC
Timing
Capacitor
Comparator
Inverting
Input
GND
Figure 3. Functional Block Diagram of AZ34063C
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
Switch Collector
Switch Emitter
Timing Capacitor
GND
Comparator Inverting Input
V
CC
I
PK
Sense
Driver Collector
Function
Internal switch transistor collector
Internal switch transistor emitter
Timing Capacitor to control the switching frequency
Ground pin for all internal circuits
Inverting input pin for internal comparator
Voltage supply
Peak Current Sense Input by monitoring the voltage drop across an
external I sense resistor to limit the peak current through the switch
Voltage driver collector
AZ34063C
Ordering Information
AZ34063C
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel
Blank: Tube
Circuit Type
Package
M: SOIC-8
P: DIP-8
Package
Temperature
Range
-40 to 85
o
C
-40 to 85
o
C
Part Number
Tin Lead
AZ34063CM
AZ34063CMTR
AZ34063CP
Lead Free
AZ34063CM-E1
Marking ID
Tin Lead
34063CM
Lead Free
34063CM-E1
34063CM-E1
AZ34063CP-E1
Packing Type
Tube
Tape & Reel
Tube
SOIC-8
DIP-8
AZ34063CMTR-E1 34063CM
AZ34063CP-E1
AZ34063CP
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Absolute Maximum Ratings (Note 1)
Parameter
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (Vpin1=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 2)
Switch Current
Power Dissipation and Thermal Characteristics
Plastic Package,
)
Power Dissipation (T
A
= 25
Thermal Resistance
SOIC Package,
)
Power Dissipation (T
A
= 25
Thermal Resistance
Operating Junction Temperature
Storage Temperature Range
ESD (Human body model)
Symbol
V
CC
V
IR
V
C
(switch)
V
E
(switch)
V
CE
(switch)
V
C
(driver)
I
C
(driver)
I
SW
Value
40
-0.3 to 40
40
40
40
40
100
0.8
Unit
V
V
V
V
V
V
mA
A
AZ34063C
P
D
R
J
P
D
R
JA
T
J
T
STG
1.25
100
625
160
150
-65 to 150
2000
W
/W
mW
/W
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Note 2: Maximum package power dissipation limits must be observed.
Recommended Operating Conditions
Parameter
Supply Voltage
Ambient Temperature
Symbol
V
CC
T
A
Min
3
-40
Max
36
85
Unit
V
o
C
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
Electrical Characteristics
(
V
CC
= 5.0 V, T
A
= -40 to 85
o
C, unless otherwise specified.)
AZ34063C
Parameter
OSCILLATOR
Frequency
Symbol
f
OSC
Conditions
VPin 5 = 0 V,
T
A
= 25
o
C
CT = 1.0 nF
CT = 330 pF
Min
30
75
30
180
5.2
250
Typ
38
88
38
240
6.5
300
1.0
Max
45
100
45
290
7.5
350
1.3
0.8
Unit
KHz
KHz
A
A
Charge Current
Discharge Current
Discharge
to
Current Ratio
Current
Limit
I
CHG
I
DISCHG
V
CC
= 5.0 V to 36 V, T
A
= 25
o
C
V
CC
= 5.0 V to 36 V, T
A
= 25
o
C
Charge I
DISCHG
/I
CHG
Pin 7 to V , T = 25
o
C
CC A
Sense
V
IPK
(sense)
V
CE
(sat)
V
CE
(sat)
h
FE
I
C
(off)
V
TH
Line
R
EGLINE
I
IB
I
CC
I
CHG
= I
DISCHG
, T
A
= 25
o
C
I
SW
= 0.8 A,
Pins 1, 8 connected
I
SW
= 0.8 A, RPin 8 = 82
V
CC
, Forced = 20
I
SW
= 0.8 A,
V
CE
= 5.0 V,
V
CE
= 36 V
T
A
= 25
o
C
T
A
= -40 to 85
o
C
V
CC
= 3.0 V to 36 V
V
IN
= 0 V
V
CC
= 5.0 V to 36 V, CT = 1.0 nF,
Pin 7 = V
CC
, VPin 5 > V
TH
,
Pin 2 = GND, other pins open
to
mV
V
V
OUTPUT SWITCH (Note 3)
Saturation Voltage,
Dalington Connection
Saturation Voltage (Note 4)
DC Current Gain
Collector Off-State Current
COMPARATOR
Threshold Voltage
1.225 1.250 1.275
1.21
1.4
-20
1.29
5
-400
4
mV
nA
mA
V
0.45
50
75
0.01
100
A
Threshold Voltage
Regulation
Input Bias Current
TOTAL DEVICE
Supply Current
Note 3: Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient temperature
as possible.
Note 4: 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 2.0us for it to come out of saturation. This condition will shorten the off time
at frequencies 30KHz, and is magnified at high temperatures. 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 rec-
ommended:
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
5
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