Panasonic AN8015SH Datasheet

Voltage Regulators

AN8015SH

Single-channel step-down, step-up, or inverting use
DC-DC converter control IC

■ Overview

The AN8015SH is a single-channel DC-DC converter

control IC using the PWM method.

This IC can provide any one output type from among

step-down, step-up and inverting output.

Its operating supply voltage range is wide and its
consumption current is small. In addition, since it uses the
10-pin surface mounting type package with 0.5 mm pitch,
it is suitable for highly efficient miniature potable power
supply, especially for a negative output power supply.

■ Features

• Wide operating supply voltage range (3.6 V to 34 V)

• Small consumption current (1.8 mA typical)

• Converter control in a wide output frequency range is

possible (2 kHz to 500 kHz).

• Built-in timer latch short-circuit protection circuit (charge current 1.1 µA typical)

• Incorporating the under-voltage lock-out (U.V.L.O.) circuit

• Incorporating a high precision reference voltage circuit (2.46 V (allowance: ± 3%))

• Output block is open-collector (darlington) type.

• High absolute maximum rating of output current (100 mA)

• Maximum duty ratio is fixed and has small sample-to-sample variations (90% ± 5%).

• Using 10-pin small outline package of 0.5 mm pitch

0.5±0.2

1

5

0.5

0.1±0.1

4.3±0.30

6.3±0.30

SSOP010-P-0225

10

6

+0.1

–0.05

0.15

Unit: mm

0.2±0.1

0.625±0.100.625±0.10

3.0±0.30

1.5±0.2

■ Applications

• LCD displays, digital still cameras, and PDAs

■ Block Diagram

IN+
IN−

FB

Error amp.

8

9
10

CC

V

6

Reference

supply

2.46 V
(allowance : ± 3%)

S.C.P. comp.

1.83 V

REF

V

7

CT1RT

2

0.5 V

Triangular
wave OSC

I

1.2 V

0.37 V

V

REF

SR

Latch

PWM
comparator

1.11 V

RO

U.V.L.O.

5

4

Out

GND

Clamp

3

S.C.P.

1

AN8015SH Voltage Regulators

■ Pin Descriptions

Pin No. Symbol Description

1 CT Pin for connecting oscillator timing capacitor
2 RT Pin for connecting oscillator timing resistor
3 S.C.P. Pin for connecting the time constant setting capacitor for short-circuit protection
4 GND Grounding pin
5 Out Open collector type output pin
6VCCPower supply voltage application pin
7V

REF

8IN+ Error amplifier noninverted input pin
9IN− Error amplifier inverted input pin

10 FB Output pin of error amplifier

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
IN− terminal allowable application voltage V
IN+ terminal allowable application voltage V
Output terminal allowable application voltage V
Collector output current I
Power dissipation
Operating ambient temperature
Storage temperature

Note)*: Expect for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25°C.

Reference voltage output pin

*

*

*

OUT

P

T

T

CC

IN−

IN+

OUT

D

opr

stg

35 V

− 0.3 to V

− 0.3 to V

REF

REF

35
100 mA
154 mW

−30 to +85 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Error amplifier input voltage V
Collector output voltage V
Collector output current I
Timing capacitance C
Timing resistance R
Oscillation frequency f
Reference voltage output current I

Soft start short-circuit protection time C
constant setting capacitance

2

OUT

OUT

OUT

RE

SCP

IN

− 0.1 to 0.8 V

34 (maximum) V
50 (maximum) mA

T

T

100 to 27 000 pF

5.6 to 15 kΩ

2 to 500 kHz

−3 to 0 mA

1 000 (minimum) pF

Voltage Regulators AN8015SH

■ Electrical Characteristics at VCC = 12 V, RT = 15 Ω, CT = 200 pF, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Reference voltage block

Reference voltage V
Input regulation with input fluctuation
Input regulation with input fluctuation 2

REFIREF

Line

Line2 VCC = 3.6 V to 20 V 10 mV
Load regulation Load I
Output voltage temperature V

TC1

characteristics 1
Output voltage temperature V

TC2

characteristics 2
Reference short-circuit current I

RS

U.V.L.O. block

Circuit operation start voltage V
Hysteresis width V

UON

HYS

Error amplifier block

Input offset voltage V
Input bias current I
Common-mode input voltage range V
High-level output voltage V
Low-level output voltage V
Output sink current I
Output source current I
Open-loop gain A

IO

B

ICR

EH

EL

SINK

SOURCEVFB

V

Common-mode ripple rejection ratio CMRR  50  dB

Output block

Oscillation frequency f
Maximum duty ratio Du
Output saturation voltage V
Output leak current I

RT terminal voltage V
Maximum oscillation frequency f
Frequency supply voltage f

OUT

maxRT

OLIO

LEAKVCC

RT

OUT(max)RT

dV

characteristics VCC = 3.6 V to 34 V
Frequency temperature characteristics 1

Frequency temperature characteristics 2

f

dT1fOUT

f

dT2fOUT

= −1 mA 2.386 2.46 2.534 V

VCC = 3.6 V to 34 V, I

= − 0.1 mA to −1 mA  210mV

REF

= −1 mA

REF

 520mV

Ta = −30°C to +25°C ± 0.5  %

Ta = 25°C to 85°C ± 0.5  %

−20  mA

2.8 3.1 3.4 V

100 200 300 mV

−6  6mV

−500 −25  nA

− 0.1  0.8 V

V

− 0.3 V

− 0.1

REF

REF

 V

 0.1 0.3 V

VFB = 0.8 V  8  mA

= 0.8 V −120 µA

 70  dB

RT = 15 kΩ, CT = 200 pF 175 195 215 kHz

= 15 kΩ, CT = 200 pF 85 90 95 %

= 50 mA, RT = 15 kΩ0.9 1.2 V

= 34 V, 10 µA

when output transistor is off

 0.5  V

= 5.6 kΩ, CT = 150 pF  500  kHz

f

= 200 kHz, ±2  %

OUT

= 200 kHz,

±3  %

Ta = −30°C to +25°C

= 200 kHz,

±3  %

Ta = 25°C to 85°C

3

AN8015SH Voltage Regulators

■ Electrical Characteristics at VCC = 12 V, RT = 15 Ω, CT = 200 pF, Ta = 25°C (continued)

Parameter Symbol Conditions Min Typ Max Unit

Short-circuit protection circuit block

Input threshold voltage V
Input standby voltage V
Input latch voltage V
Charge current I
Comparator threshold voltage V

THPC

STBY

IN

CHG

THL

V

= 0 V −1.32 −1.1 − 0.88 µA

SCP

Whole device

Total consumption current I
Total consumption current 2 I

RT = 15 kΩ1.8 2.8 mA

CC

RT = 5.6 kΩ, CT = 150 pF 2.5  mA

CC2

■ Terminal Equivalent Circuits

Pin No. Equivalent circuit Description I/O

1 CT: O

V

REF

To PWM input

OSC
comp.

210

The terminal used for connecting a timing capaci­tor to set oscillation frequency.

I

O

Use a capacitance value within the range of 100 pF
to 27 000 pF.

1

Use a oscillation frequency in the range of 2 kHz
to 500 kHz.

1.73 1.83 1.93 V

1.15 1.25 1.35 V

 30 120 mV

 1.83  V

2 RT: I

V

REF

The terminal used for connecting a timing resistor
to set oscillation frequency.
Use a resistance value within the range of 5.6 kΩ
to 15 kΩ . The terminal voltage is 0.5 V typ.

OSC PWM

100 Ω

2

RT(VRT ≈ 0.5 V)

3 S.C.P.: O

V

REF

S.C.P.

The terminal used for connecting a capacitor to set

I

CHG

CT

PWM

the time constant of soft start and timer latch short­circuit protection circuit.

S.C.P.

Latch
S

Q

R

1.83 V

3

Use a capacitance value in the range of more than
1 000 pF.
The charge current is about 1.1 mA at R

V

I

CHG

RT

=

R

T

×1[A]

30

= 15 kΩ

T

4 GND: 

Grounding terminal

4

4

Voltage Regulators AN8015SH

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description I/O

5 Out: O

V

REF

Open-collector type (darlington) output terminal.
The absolute maximum rating of output current is

5

100 mA
Use with a steady-state output current under 50
mA.

6V

6

: 

CC

The terminal for applying supply voltage.
Use with a operating supply voltage within the
range of 3.6 V to 34 V.

7V

V

CC

V

overcurrent detection

REF

:O

REF

The output terminal for the reference voltage (2.46
V)
Use with a load current −3 mA or under.
This terminal is incorporating the short-circuit

Bias to other block

7

protection circuit, and the short-circuit current is
about −20 mA. Use the V

for the reference

REF

input setting of the error amplifier.

8IN+:I

V

REF

The noninverted input terminal of the error ampli­fier.
For common-mode input, use in the range of − 0.1
V to +0.8 V.

9IN−:I

89

The inverted input terminal of the error amplifier.
For common-mode input, use in the range of − 0.1
V to +0.8 V.

10 FB: O

V

REF

120 µA

CT

PWM

The output terminal of the error amplifier.
The source current is about −120 µA, and the sink
current is about 8 mA.
Correct the frequency characteristics of the gain

8 mA

10

and the phase by connecting a resistor and a ca­pacitor between this terminal and IN− terminal.

5