Diodes AZ34063U User Manual
Data Sheet
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
General Description
The AZ34063U is a monolithic switching regulator
control circuit which contains 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.
The AZ34063U is specifically designed as a general
DC-DC converter to be used in Step-Down, Step-Up
and Voltage-Inverting applications with a minimum
number of external components.
The AZ34063U is available in 2 packages: SOIC-8 and
DIP-8.
Features
• Operation from 3.0V to 36V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5A
• Output Voltage Adjustable
• Operation Frequency up to 180kHz
• Precision 2% Reference
Applications
· Battery Chargers
· ADSL Modems
· Hubs
· Negative Voltage Power Supplies
SOIC-8
Figure 1. Package Types of AZ34063U
Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
DIP-8
1
Data Sheet
+
-
Ipk
B
1.25V
Reference
Regulator
A
8
7
54
3
2
1
SRQ
6
I
PK
C
T
OSC
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
Pin Configuration
P Package
(DIP-8)
Driver
Collector
I
Sense
PK
V
CC
Comparator
Inverting Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
M Package
(SOIC-8)
1
2
3
4
8
7
6
5
Driver
Collector
I
Sense
PK
V
CC
Comparator
Inverting Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
Figure 2. Pin Configuration of AZ34063U (Top View)
Functional Block Diagram
Driver
Collector
I
Sense
PK
V
CC
Comparator
Inverting
Input
Figure 3. Functional Block Diagram of AZ34063U
Switch
Collector
Switch
Emitter
Timing
Capacitor
GND
Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
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Data Sheet
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
Pin Description
Pin Number Pin Name Function
1 Switch Collector Internal switch transistor collector
2 Switch Emitter Internal switch transistor emitter
3 Timing Capacitor Timing Capacitor to control the switching frequency
4 GND Ground pin for all internal circuits
5 Comparator Inverting Input Inverting input pin for internal comparator
6V
7
8 Driver Collector Voltage driver collector
I
PK
CC
Sense
Voltage supply
Peak Current Sense Input by monitoring the voltage drop
across an external current sense resistor to limit the peak current through the switch
Ordering Information
AZ34063U -
Circuit Type
Package
M: SOIC-8
G1: Green
TR: Tape and Reel
Blank: Tube
P: DIP-8
Package
SOIC-8
DIP-8
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.
Temperature
Range
o
-40 to 85
-40 to 85
C
o
C
AZ34063UM-G1 34063UM-G1 Tube
AZ34063UMTR-G1 34063UM-G1 Tape & Reel
AZ34063UP-G1
Part Number Marking ID
AZ34063UP-G1
Packing
Typ e
Tube
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Data Sheet
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Power Supply Voltage V
Comparator Input Voltage Range V
Switch Collector Voltage V
Switch Emitter Voltage (V
=40V) VE(switch) 40 V
PIN 1
Switch Collector to Emitter Voltage V
Driver Collector Voltage V
Driver Collector Current (Note 2) I
Switch Current I
Power Dissipation (T
Thermal Resistance
=25oC)
A
DIP-8
SOIC-8 780 mW
DIP-8
SOIC-8 160
Operating Junction Temperature T
Lead Temperature (Soldering, 10s) T
Storage Temperature Range T
CC
IR
(switch) 40 V
C
(switch) 40 V
CE
(driver) 40 V
C
(driver) 100 mA
C
SW
P
D
θ
JA
J
LEAD
STG
ESD (Human body model) 2000 V
40 V
-0.3 to 40 V
1.5 A
1.25 W
100
o
150
260
-65 to 150
C/W
o
C
o
C
o
C
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 Max Unit
336V
-40 85
o
C
Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
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Data Sheet
1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
Electrical Characteristics
(V
=5.0V, TA=-40 to 85oC, unless otherwise specified.)
CC
Parameter Symbol Conditions Min Typ Max Unit
OSCILLATOR
V
=0V, CT=1.0nF
Frequency
Charge Current I
Discharge Current I
Discharge to Charge Current
Ratio
Current Limit Sense Voltage V
I
DISCHG/ICHG
IPK
OUTPUT SWITCH (Note 3)
Saturation Voltage,
Dalington Connection
Saturation Voltage (Note 4.)
V
V
f
OSC
CHG
DISCHG
(sense)
(sat)
CE
(sat)
CE
PIN5
T
=25oC
A
VCC=5.0V to 36V, TA=25oC
VCC=5.0V to 36V, TA=25oC
Pin 7 to VCC, TA=25oC
I
CHG=IDISCHG
=1.0A, Pins 1, 8 connected,
I
SW
, TA=25oC
Common Emitter
I
=1.0A, R
SW
=82Ω to VCC,
PIN8
Forced β=20, Common Emitter
30 38 45 KHz
30 38 45 μA
180 240 290 μA
5.2 6.5 7.5
250 300 350 mV
1.0 1.3 V
0.45 0.7 V
DC Current Gain
Collector Off-State Current I
h
FE
(off) VCE=36V 0.01 100 μA
C
ISW=1.0A, VCE=5.0V,
T
=25oC
A
50 75
COMPARATOR
1.225 1.250 1.275
1.21 1.250 1.29
1.4 5 mV
V
Threshold Voltage V
Threshold Voltage Line
Regulation
R
EGLINE
Input Bias Current I
TH
IB
TA=25oC
T
=-40 to 85oC
A
VCC=3.0V to 36V
VIN=0V -20 -400 nA
TOTAL DEVICE
VCC=5.0V to 36V, CT=1.0nF,
Supply Current I
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 2.0μs 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 recommended:
CC
V
PIN7=VCC
V
PIN2
, V
PIN5>VTH
=GND, other pins open
,
4mA
Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
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