Diodes AZ34063C User Manual

Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

General Description

The AZ34063C 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 AZ34063C 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 AZ34063C 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 to1A

• Output Voltage Adjustable

• Operation Frequency up to 180kHz (C

• Precision 2% Reference

Applications

· Battery Chargers

· ADSL Modems

· Hubs

· Negative Voltage Power Supplies

=100pF)

T

SOIC-8 DIP-8

Figure 1. Package Types of AZ34063C

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

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

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

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)

Driver
Collector

I

Sense

PK

V

CC

Collector

Switch

Emitter

Timing

Capacitor

Comparator

Switch

Inverting Input

GND

Figure 2. Pin Configuration of AZ34063C (Top View)

Functional Block Diagram

Driver

Collector

I

Sense

PK

V

CC

Comparator

Inverting

Input

Figure 3. Functional Block Diagram of AZ34063C

Switch
Collector

Switch
Emitter

Timing
Capacitor

GND

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

2

Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

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

AZ34063C -

Circuit Type

Package

M: SOIC-8

E1: Lead Free
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 "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.

Temperature

Range

o

-40 to 85

-40 to 85

C

o

C

Lead Free Green Lead Free Green

AZ34063CM-E1 AZ34063CM-G1 34063CM-E1 34063CM-G1 Tube

AZ34063CMTR-E1 AZ34063CMTR-G1 34063CM-E1 34063CM-G1 Tape & Reel

AZ34063CP-E1 AZ34063CP-G1 AZ34063CP-E1 AZ34063CP-G1

Part Number Marking ID

Packing Type

Tube

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

3

Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

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

Switch Collector to Emitter Voltage V

Driver Collector Voltage V

Driver Collector Current (Note 2) I

Switch Current I

Power Dissipation (T

Thermal Resistance

Operating Junction Temperature T

Lead Temperature (Soldering, 10s) T

Storage Temperature Range T

ESD (Human body model) 2000 V

A

=40V) VE(switch) 40 V

PIN 1

=25 ℃ )

DIP-8

SOIC-8 780 mW

DIP-8

SOIC-8 160

CC

IR

(switch) 40 V

C

(switch) 40 V

CE

(driver) 40 V

C

(driver) 100 mA

C

SW

P

D

R

θJA

J

LEAD

STG

40 V

-0.3 to 40 V

1A

1.25 W

100

150

260

-65 to 150

℃ /W

℃

℃

℃

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. 7 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Electrical Characteristics

(V

=5.0 V, TA=-40 to 85oC, unless otherwise specified.)

CC

Parameter Symbol Conditions Min Typ Max Unit

OSCILLATOR

=1.0nF 30 38 45 KHz

Frequency

Charge Current I

Discharge Current I

Discharge to Charge
Current Ratio

Current Limit Sense
Vo l t a g e

DISCHG

I

DISCHG/ICHG

V

IPK

OUTPUT SWITCH (Note 3)

Saturation Voltage,
Dalington Connection

Saturation Voltage (Note 4)

V

V

DC Current Gain h

f

OSC

CHG

(sense)

(sat)

CE

(sat)

CE

FE

V

=0V,

PIN5

T

=25oC

A

VCC=5.0V to 36 V, TA=25oC

VCC=5.0V to 36V, TA=25oC

Pin 7 to VCC, TA=25oC

I

CHG=IDISCHG

I

=1A, Pins 1, 8 connected,

SW

Common Emitter

=1A, R

I

SW

PIN8

Forced β=20, Common Emitter

ISW=1A, VCE=5.0V, TA=25oC

C

T

=330pF 75 88 100 KHz

C

T

, TA=25oC

=82 Ω to VCC,

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 0.8 V

50 75

Collector Off-State Current I

(off) VCE=36V 0.01 100 μA

C

COMPARATOR

Threshold Voltage

Threshold Voltage Line
Regulation

R

EGLINE

Input Bias Current I

V

TH

TA=25oC

T

=-40 to 85oC

A

VCC=3.0V to 36V

IB

VIN=0V -20 -400 nA

1.225 1.250 1.275

1.21 1.250 1.29

1.4 5 mV

V

TOTAL DEVICE

VCC=5.0V to 36V, CT=1.0 nF,

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 rec­ommended:

I

CC

V

PIN7=VCC

V

PIN2

, V

PIN5

=GND, other pins open

> VTH,

4mA

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

5

Data Sheet

0.1 1 10 100

1

10

100

VCC=5.0V
V

PIN7=VCC

V

PIN5

=GND

T

A

=25OC

Frequency (KHz)

CT, Oscillator Timing Capacitor (nF)

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)

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

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

IC driver - 7.0mA*

≥ 10

Typical Performance Characteristics

Vosc. Oscillator Voltage (V)

200mV/DIV

V

=5.0V

CC

V

PIN7=VCC

V

=GND

PIN2

Pin 1,5,8=open
C

=1.0nF

T

=25oC

T

A

Time . 10μs/DIV

Figure 4. Output Switch On-Off Time vs. Figure 5. Timing Capacitor Waveform

Oscillator Timing Capacitor

Figure 6. Oscillator Frequency vs.Timing Capacitor

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

Figure 7. Standby Supply Current vs. Supply Voltage

6

Data Sheet

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

250

255

260

265

270

275

280

285

290

295

300

Current Limit Sense Voltage (mV)

Temperature (OC)

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

-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

VCC=5.0V

V

PIN7=VCC

V

PIN2,3,5

=GND

T

A

=25OC

Forced β=20

Darlington Connection

Saturation Voltage (V)

Collector Current (A)

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

1.35

1.40

1.45

1.50

1.55

1.60

1.65

1.70

VCC=5.0V

V

PIN1,7,8=VCC

V

PIN3,5

=GND

T

A

=25OC

Saturation Voltage (V)

Emitter Current (A)

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Typical Performance Characteristics (Continued)

Figure 8. Emitter Follower Configuration Output

Saturation Voltage vs. Emitter Current Saturation Voltage vs. Collector Current

Figure 9. Common Emitter Configuration Output Switch

Figure 10. Current Limit Sense Voltage vs. Temperature

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

7

Data Sheet

+

-

Ipk

B

1.25V

Reference

Regulator

A

1

SRQ

I

PK

C

T

OSC

VIN 12V

C1

100μF

R3 180

C

T

470pF

L1 220μH

D1

1N5819

C3

100 μF

Optional

Filter

V

OUT

+

+

U1 AZ34063C

R1 47k

R2

2.2k

C2

330 μF

28V/175mA

+

Rsc

0.4

2

3

45

6

7

8

L2 1.0μH

V

OUT

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Typical Applications

Figure 11. 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. 7 BCD Semiconductor Manufacturing Limited

PIN5=VOUT

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

OUT

8

*

Data Sheet

+

-

Ipk

B

1.25V

Reference

Regulator

A

8

7

5

4

3

2

1

SRQ

6

I

PK

C

T

OSC

V

IN

25V

C1

100μF

Rsc

0.33

L2 1.0 μH

C3

100 μF

Optional

Filter

5V/500mA

V

OUT

D1

1N5819

L1

220 μH

CT

470 pF

+

+

R1 3.6k

R2

1.2k

C2

470 μF

+

U1 AZ34063C

V

OUT

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Typical Applications (Continued)

Figure 12. 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

(R1+R2)/R2 (V).

PIN5=VOUT

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

=1.25*

OUT

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

9

Data Sheet

+

-

Ipk

B

1.25V
Reference
Regulator

A

1

SRQ

I

PK

C

T

OSC

V

IN

4.5-6V

C1

100

μF

Rsc

0.24

L2 1.0

μH

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 AZ34063C

2

3

45

6

7

8

V

OUT

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Typical Applications (Continued)

Figure 13. 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. 7 BCD Semiconductor Manufacturing Limited

PIN5=VOUT

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

10

, 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)

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Mechanical Dimensions

SOIC-8 Unit: mm(inch)

φ

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

11

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.

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063C

Mechanical Dimensions (Continued)

DIP-8 Unit: mm(inch)

Jan. 2013 Rev. 1. 7 BCD Semiconductor Manufacturing Limited

12

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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