SGS Thomson Microelectronics ST662ACN, ST662ACD, ST662ABN, ST662ABD Datasheet

ST662A

DC-DC CONVERTER FROM 5V TO 12V, 0.03A

FOR FLASH MEMORY PROGRAMMING SUPPLY

June 1997

■ OUTPUT VOLTAGE:12V± 5%

■ SUPPLYVOLTAGERANGE: 4.5V TO 5.5V

■ GUARANTEED OUTPUT CURRENT UPTO

30mA

■ VERYLOWQUIESCENTCURRENT: 100µA

■ LOGICCONTROLLEDELECTRONIC

SHUTDOWN: 1µA

■ JUSTCAPACITORSNEEDED(NO

INDUCTOR)

DESCRIPTION

The ST662A is a regulated charge pump DC-DC
converter.It provides12V ± 5% output voltage to
programbyte-wide flash memory, and can supply
30mA output current from inputas low as4.75V

A logic controlled shut down pin that interfaces
directly with microprocessor reduces the sypply
currentto only1µA

TYPICALAPPLICATION CIRCUIT

DIP-8

SO-8

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ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

cc

DC Input Voltage to GND -0.3 to 6 V

SHDN Shutdown Voltage -0.3 to V

CC

+0.3 V

I

o

OutputCurrent Continuous 50 mA

P

tot

Power Dissipation 500 mW

T

op

Operating Ambient Temperature Range(forAC SERIES)

(for AB SERIES)

0to70

-40to85

o

C

o

C

T

stg

StorageTemperature Range - 40 to 150

o

C

Absolute Maximum Rating are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.

CONNECTION DIAGRAM AND (top view)

PINCONNECTIONS

Pin No Symbol Name and Function

1 C1- Negative Terminal For The FirstCharge Pump Capacitor
2 C1+ Positive Terminal For The FirstCharge Pump Capacitor
3 C2- Negative Terminal For The Second Charge Pump Capacitor
4 C2+ Positive Terminal For The SecondCharge Pump Capacitor
5V

CC

Supply Voltage

6V

OUT

12VOutputVoltage V

OUT=VCC

WheninSshutdownMode
7 GND Ground
8 SHDN ActiveHigh C-MOS logic level Shutdown Input. SHDNisinternally pulled up to

V

CC

. Connect to GND for NormalOperation. InShutdownmodethecharge

pumpsareturnedoff and V

OUT=VCC

ORDERING NUMBERS

Type DIP-8 SO-8 (*)

ST662AB ST662ABN ST662ABD
ST662AC ST662ACN ST662ACD

(*) AVAILABLE IN TAPE ANDREEL WITH ”-TR” SUFFIX

ST662A

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ELECTRICAL CHARACTERISTICS (Refer to the test circuits, VCC= 4.5V to 5.5V Ta=T

min

to T

max

unless otherwisespecified. TypicalValue are referred at Ta=25oC)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

o

OutputVoltage Io= 0mA to20 mA 11.4 12 12.6 V

V

o

OutputVoltage Io= 0 mA to30mA VCC=4.75 to 5.5V 11.4 12 12.6 V

I

Q1

Quiescent Current No Load, V

SHDN

=0 100 500 µ A

I

Q2

Shutdown Current No Load, V

SHDN=VCC

110µA

I

SH

Shutdown Pin Current V

SHDN

=0V, VCC=5V

V

SHDN=VCC

=5V

-50 -12
0

-5 µA
µA

V

il

Shutdown Input LowThreshold 0.4 V

V

ih

Shutdown Input High
Threshold

2.4 V

f

o

OscillatorFrequency VCC= 5V, Io=30 mA 400 KHz

ν Power Efficecy V

CC

= 5V, Io=30mA 72 %

R

sw

VCC-V

OUT

Switch Impedance V

SHDN=VCC

=5V, Io=100µA12KΩ

Do not overload or short the Output to Ground. If the above conditions are observerd, the device may be damaged.

OutputVoltage vs Temperature

Supply Currentvs Temperature

OutputVoltage vs Temperature

SupplyCurrernt vs SupplyVoltage

ST662A

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OutputVoltage vs Shutdown Input Voltage

Test Circuit

OutputVoltage vs Shutdown Input Voltage

SHDNPin Currentvs Temperature OutputVoltage vs Shutdown Input Voltage

ST662A

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