HT7660 データシートの表示（PDF） - Holtek Semiconductor
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HT7660 Datasheet PDF : 10 Pages
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HT7660
Pin Assignment
BO O ST 1
CAP+ 2
VSS 3
CAP- 4
8 VDD
7 O SC
6 LV
5 VO UT
H T7660
8 D IP -A /S O P -A
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
¾
¾
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
6 LV
I
Floating this pin enables the voltage regulator. Connect this pin to
¾
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
¾
¾
Positive power supply
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+13V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°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
Symbol
VDD
ISTB
fOSC
ROUT
VCON-EFF
PEFF
Parameter
Test Conditions
VDD Conditions
Operating Voltage
¾
¾
Standby Current
3V
No load
5V
System Frequency
3V
¾
5V
Output Source Resistance
3V IOUT=10mA
5V IOUT=20mA
3V
Voltage Conversion Efficiency
No load
5V
Power Efficiency
3V
RL=5kW
5V
Min.
3
¾
¾
2.5
5
¾
¾
99
99
96
96
Typ.
¾
26
80
4
10
97
60
¾
99.9
¾
98
Max.
12
100
160
¾
¾
150
100
¾
¾
¾
¾
Ta=25°C
Unit
V
mA
kHz
W
%
%
Rev. 1.10
2
January 21, 2003
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