Pin Assignment

Pin Description

Pin No. Pin Name I/O

Internal

Connection

Description

1

BOOST

I

CMOS Pull-low

Higher switching frequency selection input

2

CAP+

O

CMOS

This pin is connected to the positive terminal of Capacitor C1 for a

charge pump

3

VSS

¾¾

Negative power supply, ground

4

CAP

-

O

NMOS

This pin is connected to the negative terminal of Capacitor C1 for a

charge pump

5

VOUT

O

NMOS

This pin is connected to the negative terminal of Capacitor C2 for

charge reservoir. Output voltage pass through this pin

6LV

I

¾

Floating this pin enables the voltage regulator. Connect this pin to

VSS (Ground) to bypass voltage regulator and improve low voltage

operation

7

OSC

I/O Transmission Gate

External clock input pin. This pin can be connected with an external

capacitor to reduce switching frequency

8

VDD

¾¾

Positive power supply

Absolute Maximum Ratings

Operating Temperature...........................

-40°Cto85°C

Storage Temperature ............................

-50°Cto125°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

Electrical Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

¾¾

3

¾

12

V

Standby Current

3V

No load

¾

26

100

mA

5V

¾

80

160

System Frequency

3V

¾

2.5

4

¾

kHz

5V

5

10

¾

Output Source Resistance

3V

¾

97

150

W

5V

¾

60

100

Voltage Conversion Efficiency

3V

No load

99

¾¾

%

5V

99

99.9

¾

Power Efficiency

3V

W

96

¾¾

%

5V

96

98

¾

HT7660

Rev. 1.10

2

January 21, 2003

1

2

3

4

8

7

6

5

B O O S T

C A P +

V S S

C A P -

V D D

O S C

L V

V O U T

H T 7 6 6 0

8 D I P - A / S O P - A