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

2

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

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

3

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

4

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

5

Data Sheet

0 5 10 15 20 25 30 35 40

0.5

1.0

1.5

2.0

2.5

3.0

3.5

CT=1.0nF

V

PIN7=VCC

V

PIN2

=GND

I

CC

Supply Current (mA)

VCC Supply Voltage (V)

0.1 1 10 100

1

10

100

1000

t

off

t

on

VCC=5.0V

V

PIN7=VCC

V

PIN5

=GND

T

A

=25OC

Ton-off Output Switch On-Off Time (μs)

CT Oscillator Timing Capacitor (nF)

0.1 1 10 100

1

10

100

Oscillator Frequency (kHz)

CT Timing Capacitor (nF)

VCC=5.0V

V

PIN7=VCC

V

PIN5

=GND

T

A

=25OC

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Electrical Characteristics (Continued)

Forced β of output switch:

* The 100Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.

IC output

ICdriver - 7.0mA*

≥ 10

Typical Performance Characteristics

(V

=5.0V, TA=25oC, unless otherwise specified.)

CC

Oscillator Voltage (V)

OSC

V

200mV/DIV

V

=5.0V

CC

V

PIN7=VCC

V

PIN2

=GND

Pin 1,5,8=open

=1.0nF

C

T

T

=25oC

A

Figure 4. Output Switch On-Off Time vs.

Oscillator Timing Capacitor

Figure 6. Oscillator Frequency vs.Timing Capacitor Figure 7. Standard Supply Current vs. Supply Voltage

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

Time 20μs/DIV

Figure 5. Timing Capacitor Waveform

6

Data Sheet

-0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7

1.2

1.3

1.4

1.5

1.6

VCC=5.0V
V

PIN1,7,8=VCC

V

PIN3,5

=GND

TA=25OC

Saturation Voltage (V)

Emitter Current (A)

0.00.20.40.60.81.01.21.41.6

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

Darlington Connection

Forced β=20

VCC=5.0V
V

PIN7=VCC

V

PIN2,3,5

=GND

T

A

=25OC

Saturation Voltage (V)

Collector Current (A)

-60 -40 -20 0 20 40 60 80 100 120 140

240

250

260

270

280

290

300

Temperature (OC)

Current Limit Sense Voltage (mV)

-40 0 40 80 120 160

1.224

1.232

1.240

1.248

1.256

Feedback Voltage (V)

Temperature (OC)

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Typical Performance Characteristics (Continued)

(

VCC=5.0V, TA=25oC, unless otherwise specified.)

Figure 8. Emitter Follower Configuration Output

Saturation Voltage vs. Emitter current

Figure 9. Common Emitter Configuration Output Switch

Saturation Voltage vs. Collector Current

Figure 10. Current Limit Sense Voltage vs. Temperature

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

Figure 11. Feedback Voltage vs. Temperature

7

Data Sheet

-40 0 40 80 120 160

60

80

100

120

140

Operation Frequency (kHz)

Temperature (oC)

VCC=5.0V

CT=330pF

-40 0 40 80 120 160

0.8

1.0

1.2

1.4

Saturation Voltage (V)

Temperature (OC)

ISW =1.0A

VCC=5.0V

PIN1 PIN8 Connected

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Typical Performance Characteristics (Continued)

(V

=5.0V, TA=25oC, unless otherwise specified.)

CC

Figure 12. Operation Frequency vs. Temperature

Figure 13. Saturation Voltage vs. Temperature

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

8

Data Sheet

+

-

Ipk

B

1.25V

Reference

Regulator

A

5

SRQ

I

PK

C

T

OSC

VIN 12V

C1

100μF

R3 180

C

T

470pF

L1 150μH

D1

1N5819

L2 1.0 μΗ

C3

100 μF

Optional

Filter

V

OUT

+

+

U1 AZ34063U

R1 47k

R2

2.2k

C2

330 μF

28V/175mA

+

Rsc

0.22

6

7

8

1

2

3

4

V

OUT

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Typical Applications

Figure 14. Step-Up Converter (Note 5)

Note 5: This is a typical step-up converter configuration. In the steady state, if the resistor divider voltage at pin
5 is greater than the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the
output of the comparator will go low. At the next swithching period, the output switch will not conduct and the
output voltage will eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25V.
Then the output of the comparator will go high, the output switch will be allowed to conduct. Since V

R2/(R1+R2)=1.25(V), the output voltage can be decided by V

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

PIN5=VOUT

=1.25 * (R1+R2)/R2 (V).

OUT

9

*

Data Sheet

+

-

Ipk

B

1.25V

Reference

Regulator

A

1

SRQ

I

PK

C

T

OSC

VIN 25V

C1

100μF

Rsc

0.33

L2 1.0 μH

C3

100 μF

Optional

Filter

5V/500mA

V

OUT

D1

1N5819

L1

220 μH

C

T

470 pF

+

+

R1 3.6k

R2

1.2k

C2

470 μF

+

U1 AZ34063U

2

3

4

5

6

7

8

V

OUT

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Typical Applications (Continued)

Figure 15. Step-Down converter (Note 6)

Note 6: This is a typical step-down converter configuration. The working process in the steady state is similar to
step-up converter, V

PIN5=VOUT

(R1+R2)/R2 (V).

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

*R2/(R1+R2)=1.25 (V), the output voltage can be decided by V

OUT

10

=1.25*

Data Sheet

+

-

Ipk

B

1.25V
Reference
Regulator

A

8

SRQ

I

PK

C

T

OSC

V

IN

4.5-6V

C1

100 μF

Rsc

0.24

L2 1.0 μΗ

Optional

Filter

V

OUT

D1

1N5819

L1

88 μΗ

+

C3

100 μF

+

C

T

470pF

R1 953

R2

8.2k

C2

1000 μF

-12V/100mA

+

U1 AZ34063U

7

6

54

3

2

1

V

OUT

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Typical Applications (Continued)

Figure 16. Voltage Inverting Converter (Note 7)

Note 7: This is a typical inverting converter configuration. The working process in the steady state is similar to
step-up converter, the difference in this situation is that the voltage at the non-inverting pin of the comparator is
equal to 1.25V+V

V

=-1.25*(R1+R2)/R1 (V).

OUT

OUT

, then V

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

PIN5=VOUT

*R2/(R1+R2)=1.25V+V

11

, so the output voltage can be decided by

OUT

Data Sheet

0

°

8

°

1°
5°

R

0

.

1

5

0

(

0

.

0

0

6

)

R0.150(0.006)

1.000(0.039)

0.330(0.013)

0.510(0.020)

1.350(0.053)

1.750(0.069)

0.100(0.004)

0.300(0.012)

0.900(0.035)

0.800(0.031)

0.200(0.008)

3.800(0.150)

4.000(0.157)

7

°

7

°

2

0

:

1

D

1.270(0.050)

TYP

0.190(0.007)

0.250(0.010)

8

°

D

5.800(0.228)

6.200(0.244)

0.675(0.027)

0.725(0.029)

0.320(0.013)

8

°

0.450(0.017)

0.800(0.031)

4.700(0.185)

5.100(0.201)

Note: Eject hole, oriented hole and mold mark is optional.

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Mechanical Dimensions

SOIC-8 Unit: mm(inch)

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

12

Data Sheet

4

°

6

°

R0.750(0.030)

0.254(0.010)TYP

0.130(0.005)MIN

8.200(0.323)

9.400(0.370)

0.204(0.008)

0.360(0.014)

7.620(0.300)TYP

4

°

6

°

5°

0.700(0.028)

9.000(0.354)

9.600(0.378)

3.710(0.146)

4.310(0.170)

3.000(0.118)

3.600(0.142)

0.360(0.014)

0.560(0.022)

2.540(0.100) TYP

6.200(0.244)

6.600(0.260)

3.200(0.126)

3.600(0.142)

0.510(0.020)MIN

Φ3.000(0.118)

Depth

0.100(0.004)

0.200(0.008)

1.524(0.060) TYP

Note: Eject hole, oriented hole and mold mark is optional.

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U

Mechanical Dimensions (continued)

DIP-8 Unit: mm(inch)

Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

13

BCD Semiconductor Manufacturing Limited

IMPORTANT NOTICE

IMPORTANT NOTICE

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi-

cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any

cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any

particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or

of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or

other rights nor the rights of others.

other rights nor the rights of others.

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