Panasonic AN8083S Datasheet

ICs for CD/CD-ROM Player

■ Overview

The AN8083S is an IC for controlling a DC-DC convert­er suitable for the switching power supply of various
portable equipments. It can operate with input voltage

1.1V or more.

■ Features

•

Operatable with low voltage input (PV

CC

>1.1V)

•

Decreased voltage detection circuit built-in

•

Short-circuit protection feature built-in

•

Provided with reset output

•

Synchronizable with outside clock

•

Low consumption current in stand-by mode

•

Output voltage in secondary side; 4.8V+0.3V (Variable

by using external resistance)

AN8083S

Low Voltage Operation IC for DC-DC Converter

0.1±0.1

1.5±0.2

0.3

0.65

0.15

0.4

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10
9

0.4±0.25

1.27

Unit : mm

6.5

±0.3

4.2±0.3

10.1±0.3

16-lead SOP package (SOP016-P-0225A)

15 1316 14 7

1 2 3 4 5

6

V

SEN

PV

CC

IN

10 12

9

8

11

Power
OFF

63kΩ

–+

GND

0.9V

1.25V

0.7V

4.2V

0.725V

30kΩ

2.0V

4.8V

1.25V 3.0 → 2.5V

2.15V

0.25V

0.85V

V

REF

–25µA

–+

–
+

+

–

+

–

+

–
+

RESET

EMP START

V

REF

CT

CLK

POWER

FB SPRO DED OUT

Starter SW
Early Value Set.

Starter

Switching
Circuit

Triangular
Wave

V

CC

■ Block Diagram

ICs for CD/CD-ROM Player

AN8083S

V

CC

PV

CC

P

D

T

opr

T

stg

Supply Voltage

Power Dissipation
Operating Ambient Temperature
Storage Temperature

V

mW

˚C
˚C

Parameter Symbol Rating Unit

■ Absolute Maximum Ratings (Ta=25˚C)

14.4

14.4
380

–20 ~ +75

–55 ~ +125

Paramenter Symbol Range

■ Recommended Operating Range (Ta=25˚C)

Operating Supply Voltage Range

V

CC

PV

CC

1.8V ~ 12V

1.1V ~ 12V

Parameter Symbol Condition min. typ. max. Unit

■ Electrical Characteristics (Ta=25˚C)

Power VCC Stand-by Mode Supply Current

I

PVCC

2 µA

V

CC

=0V, PVCC=3V

Power VCC Operating Mode Supply Current

I

PVCC

3 mA1.2

V

CC

=3.1V, PVCC=3V

Output Voltage

V

O

V4.8

Reset Output Threshold Voltage

4V

TH (RESET)

4.4 V

PV

CC

=3V

Decreased Voltage Detection Threshold Voltage

2.05V

TH (VSEN)

2.25 V2.15

PV

CC

=3V

Short-Circuit Protection Operating Voltage

1.35V

O (SPRO)

2.1 V

V

IN

=0V, V

POWER

=2V

Short-Circuit Protection Operating Voltage

1.7V

O (SPRO)

3.2 V

V

IN

=1V, V

POWER

=0V

Oscillation Frequency in Normal Operation

60f

OSC1

80 kHz70

R

REF

=33kΩ, CT=330pF

f

OSC2

80

100 120

kHzOscillation Frequency at Start

R

REF

=33kΩ, CT=330pF

V

CC

=1.9V, PVCC=3V

Output Voltage (Normal)

1.2V

OH (OUT)

1.6 V

I

O

= –20mA, VCT=0V

Output Voltage (Normal)

V

OL (OUT)

0.4 V

I

O

=20mA, VCT=1V

Note) Unless otherwise specified, V

CC

=4.8V, PVCC=3V

4.2

15 16 13 14 10 7 12

9

8

11

6

54321

+

2.15V
V

REF

4.8V

4.2V

0.7V

1.25V

2.0V

0.9V

30kΩ

–25µA

63kΩ

+
–

+
–

+

–

+

–

+

+ –

3.0V→ 2.5V

33kΩ

0.01µF

IN FB

SPRO

47µF

DED

0.01µF

OUT

GND

0.01µF

100Ω

POWER

CLK

PV

CC

4.8V±0.3V

33kΩ330pF

V

REF

CT

START

V

SENSE

EMP

V

CC

+ –

Power
OFF

0.25V

0.85V

1.25V

Connect Pin11 to the secondary side and Pin10 to GND at oscillation start. (Pin10 is always open.)

RESET

0.725V

Starter SW
Initial set

Starter

SW
circuit

+

Triangular
Wave

■ Application Circuit