
4-37
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
HIGH CURRENT CHARGE PUMP DC-TO-DC CONVERTER
TC962
PIN CONFIGURATIONS
(DIP and SOIC)
+
1
2
3
4
8
7
6
5
FREQ x 2
VOUT
V
NC
CAZENER
GND
C
TC962IJA
TC962MJA
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
GND
NC
C
COSC
NC
FREQ x 2
NC
VOUT
NC
TC962COE
NC
C
–
DD
COSC
ZENER
CATHODE
NC
C
+
–
VDD
88-Pin DIP
16-Pin SOIC Wide
+
–
COMPARATOR
C
F/F
Q
Q
VREF
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
VDD
P SW1
CAP
CP
EXTERNAL
N SW4
N SW2
N SW3
CAP
CR
RL
V
I
I
TIMING
ZENER
CATHODE
FREQ X 2
+
GND
–
OUT
8
2
3
OUT
5
4
7
1
6.4V
6
+
+
TC962
FEATURES
I
I
I
I
I
I
I
I
Pin Compatible With TC7662/ICL7662/SI7661
High Output Current....................................... 80mA
No External Diodes Required
Wide Operating Range .............................3V to 18V
Low Output Impedance .............................28
Typ.
No Low Voltage Terminal Required
Application Zener On Chip
OSC Frequency Doubling Pin Option for Smaller
Output Capacitors
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC962COE
TC962CPA
TC962EPA
TC962IJA
TC962MJA
TC7660EV
16-Pin SOIC Wide
8-Pin Plastic DIP
8-Pin Plastic DIP
8-Pin CerDIP
8-Pin CerDIP
Evaluation Kit for Charge Pump Family
0
°
C to +70
°
C
0
°
C to +70
°
C
– 40
°
C to +85
°
C
– 25
°
C to +85
°
C
– 55
°
C to +125
°
C
GENERAL DESCRIPTION
The TC962 is an advanced version of the industry-
standard 7662 high-voltage DC-to-DC converter. Using
improved design techniques and CMOS construction, the
TC962 can source as much as 8mA versus the 7662’s
20mA capability.
As an inverter, the TC962 can put out voltages as high
as 18V and as low as 3V without the need for external
diodes. The output impedance of the device is a low 28
(with the proper capacitors), voltage conversion efficiency
is 99.9%, and power conversion efficiency is 97%.
The low voltage terminal (pin 6) required in some 7662
applications has been eliminated. Grounding this terminal
will double the oscillator frequency from 12kHz to 24kHz.
This will allow the use of smaller capacitors for the same
output current and ripple, in most applications. Only two
external capacitors are required for inverter applications. In
the event an external clock is needed to drive the TC962
(such as paralleling), driving this pin directly will cause the
internal oscillator to sync to the external clock.
FUNCTIONAL BLOCK DIAGRAM
EVALUATION
KIT
AVAILABLE
TC962-8 9/16/96