Diodes AZ34063D User Manual

Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

General Description

The AZ34063D 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 AZ34063D 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 AZ34063D 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 AZ34063D

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Pin Configuration

Switch

Collector

Switch

Emitter

Timing

Capacitor

GND

1

2

3

4

M Package

(SOIC-8)

Driver

8

Collector

I

7

PK

V

CC

6

Comparator

5

Inverting Input

Sense

Collector

Switch

Emitter

Timing

Capacitor

GND

Figure 2. Pin Configuration of AZ34063D (Top View)

Switch

1

2

3

4

P Package

(DIP-8)

Driver

8

Collector

I

Sense

PK

7

V

CC

6

Comparator

5

Inverting Input

Functional Block Diagram

Driver

Collector

I

Sense

PK

V

CC

Comparator

Inverting

Input

Figure 3. Functional Block Diagram of AZ34063D

8

B

A

7

SRQ

1

2

Switch
Collector

Switch
Emitter

Ipk

I

PK

C

T

OSC

6

3

Timing
Capacitor

+

-

54

1.25V
Reference
Regulator

GND

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

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

AZ34063D -

Circuit Type

Package

M: SOIC-8

G1: Green

TR: Tape and Reel
Blank: Tube

P: DIP-8

Package Temperature Range Part Number Marking ID Packing Type

SOIC-8

DIP-8

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.

-40 to 85

-40 to 85

o

C

o

C

AZ34063DM-G1 34063DM-G1 Tube

AZ34063DMTR-G1 34063DM-G1 Tape & Reel

AZ34063DP-G1 AZ34063DP-G1

Tube

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

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

1A

1.25 W

100

150

260

-65 to 150

o

C/W

o

o

o

C

C

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

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Electrical Characteristics

(V

=5.0V, 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 V

0.45 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 2.0µs 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:

I

CC

V

PIN7=VCC

V

PIN2

, V

PIN5

=GND, other pins open

> VTH,

4mA

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

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

(V

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

CC

1000

VCC=5.0V

V

PIN7=VCC

V

=GND

PIN5

=25OC

T

A

100

10

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

1

0.1 1 10 100

CT Oscillator Timing Capacitor (nF)

t

on

t

off

V

Vosc Oscillator Voltage (V)

200mV/DIV

=5.0V

CC

V

PIN7=VCC

V

PIN2

=GND

Pin 1,5,8=open

=1.0nF

C

T

T

=25oC

A

Time 20µs/DIV

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

Oscillator Timing Capacitor

100

10

1

Oscillator Frequency (kHz)

0.1 1 10 100

CT Timing Capacitor (nF)

VCC=5.0V

V

PIN7=VCC

V

=GND

PIN5

T

=25OC

A

Figure 6. Oscillator Frequency vs.Timing Capacitor

3.5

3.0

2.5

2.0

1.5

Supply Current (mA)

CC

I

1.0

0.5
0 5 10 15 20 25 30 35 40

VCC Supply Voltage (V)

Figure 7. Standby Supply Current vs. Supply Voltage

CT=1.0nF

V

PIN7=VCC

V

PIN2

=GND

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Typical Performance Characteristics (Continued)

(

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

1.70

1.65

1.60

1.55

1.50

VCC=5.0V

1.45

Saturation Voltage (V)

1.40

1.35

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

V

PIN1,7,8=VCC

V

=GND

PIN3,5

T

=25OC

A

Emitter Current (A)

Figure 8. Emitter Follower Configuration Output

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Saturation Voltage (V)

0.2

0.1

0.0

-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

Darlington Connection

Collector Current (A)

Figure 9. Common Emitter Configuration Output Switch

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

Forced β=20

VCC=5.0V

V

PIN7=VCC

V

PIN2,3,5

T

=25OC

A

=GND

300

295

290

285

280

275

270

265

260

Current Limit Sense Voltage (mV)

255

250

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

Temperature (OC)

Figure 10. Current Limit Sense Voltage vs. Temperature

1.27

1.26

1.25

1.24

Feedback Voltage (V)

1.23

1.22

-40 0 40 80 120 160

Figure 11. Feedback Voltage vs. Temperature

Temperature (OC)

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Typical Performance Characteristics (Continued)

(V

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

CC

130

120

110

100

90

80

70

Operation Frequency (kHz)

60

50

-40 0 40 80 120 160

VCC=5.0V

CT=330pF

Temperature (OC)

Figure 12. Operation Frequency vs. Temperature

1.4

1.2

1.0

Saturation Voltage (V)

0.8

-40 0 40 80 120 160

Figure 13. Saturation Voltage vs. Temperature

ISW =1.0A

VCC=5.0V

PIN1 PIN8 Connected

Temperature (oC)

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Typical Applications

L1 220µH

VIN 12V

+

Rsc

0.4

C1

100µF

R3 180

8

B

A

SRQ

7

Ipk

I

PK

C

T

OSC

6

+

-

1.25V

Reference

Regulator

1

2

D1

1N5819

3

C

T

470pF

45

L2 1.0µH

Optional

Filter

+

100 µF

V

OUT

C3

R2

2.2k

U1 AZ34063D

R1 47k

+

28V/175mA

C2

330 µF

V

OUT

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

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

OUT

PIN5=VOUT

*

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Typical Applications (Continued)

8

B

A

SRQ

7

Ipk

I

Rsc

0.33

V

25V

IN

+

C1

100µF

6

PK

OSC

+

-

C

T

1.25V
Reference
Regulator

5

1

2

D1

1N5819

3

CT

470 pF

L1

220 µH

4

L2 1.0 µH

Optional

Filter

+

100 µF

V

OUT

C3

R2

1.2k

U1 AZ34063D

R1 3.6k

+

5V/500mA

C2

470 µF

V

OUT

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

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

OUT

=1.25*

(R1+R2)/R2 (V).

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Typical Applications (Continued)

1

2

L1

88 µΗ

3

C

T

470pF

D1

1N5819

45

V

IN

4.5-6V

Rsc

0.24

+

100 µF

8

B

A

SRQ

7

Ipk

I

PK

C

T

OSC

6

C1

+

-

1.25V
Reference
Regulator

R2

8.2k

U1 AZ34063D

R1 953

+

-12V/100mA

C2

1000 µF

V

OUT

L2 1.0 µH

Optional

Filter

+

V

C3

100 µF

OUT

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

PIN5=VOUT

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

, so the output voltage can be decided by

OUT

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Mechanical Dimensions

SOIC-8 Unit: mm(inch)

4.700(0.185)

5.100(0.201)

7

°

7

°

1.270(0.050)

TYP

0.100(0.004)

0.300(0.012)

1.350(0.053)

1.750(0.069)

0.675(0.027)

0.725(0.029)

D

2

D

1

:

0

0.320(0.013)

5.800(0.228)

6.200(0.244)

0.800(0.031)

°

8

°

8

0.200(0.008)

0

°
°

8

1°
5°

0.450(0.017)

0.800(0.031)

)

6

0

0

.

(

0

0

5

1

.

0

R

1.000(0.039)

0.330(0.013)

0.510(0.020)

R0.150(0.006)

3.800(0.150)

4.000(0.157)

0.190(0.007)

0.250(0.010)

0.900(0.035)

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

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

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Data Sheet

1A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063D

Mechanical Dimensions (Continued)

DIP-8 Unit: mm(inch)

0.700(0.028)

7.620(0.300)TYP

°

6

°

4

8.200(0.323)

9.400(0.370)

5°

0.204(0.008)

0.360(0.014)

3.710(0.146)

4.310(0.170)

3.000(0.118)

3.600(0.142)

°

6

4

°

0.254(0.010)TYP

0.360(0.014)

0.560(0.022)

1.524(0.060) TYP

3.200(0.126)

3.600(0.142)

0.510(0.020)MIN

2.540(0.100) TYP

0.130(0.005)MIN

R0.750(0.030)

Φ3.000(0.118)

Depth

0.100(0.004)

0.200(0.008)

9.000(0.354)

9.400(0.370)

6.200(0.244)

6.600(0.260)

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

Mar. 2010 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

13

BCD Semiconductor Manufacturing Limited

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

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