ST ST662AB, ST662AC User Manual

DC-DC converter from 5 V to 12 V, 0.03 A

for Flash memory programming supply

Features

■ Output voltage: 12 V ± 5 %

■ Supply voltage range: 4.5 V to 5.5 V

■ Guaranteed output current up to 30 mA

■ Very low quiescent current: 100 µA

■ Logic controlled electronic shutdown: 1 µA

■ Just capacitors needed (no inductor)

Description

The ST662A is a regulated charge pump DC-DC
converter. It provides 12 V ± 5 % output voltage to
program byte-wide Flash memory, and can supply
30 mA output current from input as low as 4.75 V.
A logic controlled shut down pin that interfaces
directly with microprocessor reduces the supply
current to only 1 µA. The ST662AB is available as
Automotive Grade in SO-8 package. This device
is qualified according to the specification AEC­Q100 of the Automotive market, in the
temperature range - 40 °C to 125 °C, and the
statistical tests PAT, SYL, SBL are performed.

ST662AB

ST662AC

SO-8

Table 1. Device summary

Order codes Package

ST662ABD-TR SO-8 (tape and reel)

ST662ABD-TRY

ST662ACD-TR SO-8 (tape and reel)

1. Automotive Grade products.

August 2010 Doc ID 5068 Rev 8 1/20

(1)

SO-8 (tape and reel)

www.st.com

20

Contents ST662AB, ST662AC

Contents

1 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.1 ST662A output performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

8 How to increase output current or output voltage capability . . . . . . . 14

9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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ST662AB, ST662AC Application circuit

1 Application circuit

Figure 1. Typical application circuit

Doc ID 5068 Rev 8 3/20

Pin configuration ST662AB, ST662AC

2 Pin configuration

Figure 2. Pin connections (top view)

Table 2. Pin description

Pin n° Symbol Name and function

1 C1- Negative terminal for the first charge pump capacitor

2 C1+ Positive terminal for the first charge pump capacitor

3 C2- Negative terminal for the second charge pump capacitor

4 C2+ Positive terminal for the second charge pump capacitor

5V

6V

CC

OUT

Supply voltage

12 V output voltage V

= VCC when in shutdown mode

OUT

7 GND Ground

Active high C-MOS logic level shutdown input. SHDN is internally pulled up to V

8 SHDN

Connect to GND for normal operation. In Shutdown mode the charge pumps are turned
off and V

OUT

= V

CC

CC

.

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ST662AB, ST662AC Maximum ratings

3 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

SHDN Shutdown voltage -0.3 to (V

I

O

P

D

DC input voltage to GND -0.3 to 6 V

+ 0.3) V

CC

Output current continuous 50 A

Power dissipation 500 mW

AC series 0 to 70

T

T

OP

STG

Operating ambient temperature range

°C

AB series -40 to 85

Storage temperature range -40 to 150 °C

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these condition is not implied.

Table 4. Thermal data

Symbol Parameter SO-8 Unit

R

thJC

Thermal resistance junction-case 20 °C/W

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Electrical characteristics ST662AB, ST662AC

4 Electrical characteristics

Refer to the test circuits, VCC = 4.5 V to 5.5 V, TA = T
specified. Typical value are referred at T

Table 5. Electrical characteristics

= 25 °C.

A

MIN

to T

, unless otherwise

MAX

Symbol Parameter Test conditions Min. Typ. Max. Unit

I

= 0 to 20 mA 11.4 12 12.6

V

Output voltage

O

I

Quiescent current NO LOAD, V

Q1

Shutdown current NO LOAD, V

I

Q2

I

Shutdown pin current

SH

Shutdown input low threshold 0.4 V

V

IL

V

Shutdown input high threshold 2.4 V

IH

Oscillator frequency VCC = 5 V, IO = 30 mA 400 kHz

f

O

n Power efficiency V

R

SWVCC

- V

switch impedance V

OUT

O

= 0 to 30 mA, VCC = 4.75 to 5.5 V 11.4 12 12.6

I

O

= 0 100 500 µA

SHDN

= V

SHDN

V

= 0, V

SHDN

V

SHDN

= 5 V, IO = 30 mA 72 %

CC

SHDN

CC

= V

= 5V 0 µA

CC

= V

= 5V, IO = 100 µA 1 2 kΩ

CC

CC

= 5V -50 -12 -5 µA

110µA

Refer to the test circuits, VCC = 4.5 V to 5.5 V, TA = -40 to 125 °C, unless otherwise
specified. Typical value are referred at T

Table 6. Electrical characteristics for ST662AB-TRY (Automotive Grade)

= 25 °C.

A

V

Symbol Parameter Test conditions Min. Typ. Max. Unit

I

= 0 to 20 mA 11.2 12 12.8

V

Output voltage

O

Quiescent current NO LOAD, V

I

Q1

I

Shutdown current NO LOAD, V

Q2

I

Shutdown pin current

SH

V

Shutdown input low threshold 0.4 V

IL

Shutdown input high threshold 2.4 V

V

IH

Oscillator frequency VCC = 5 V, IO = 30 mA, TA = 25°C 400 kHz

f

O

n Power efficiency V

- V

R

SWVCC

switch impedance V

OUT

O

= 0 to 30 mA, VCC = 4.75 to 5.5 V 11.2 12 12.8

I

O

= 0 100 500 µA

SHDN

= V

SHDN

V

= 0, V

SHDN

V

SHDN

= 5 V, IO = 30 mA, TA = 25°C 72 %

CC

SHDN

CC

= V

= 5V, TA = 25°C 0 µA

CC

= V

= 5V, IO = 100 µA 1 2 kΩ

CC

CC

= 5V -50 -12 -5 µA

115µA

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V