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PDF TC7662AIJA Data sheet ( Hoja de datos )
| Número de pieza | TC7662AIJA | |
| Descripción | CHARGE PUMP DC-TO-DC CONVERTER | |
| Fabricantes | TelCom Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TC7662AIJA (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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EVALUATION
KIT
AVAILABLE
1
TC7662A
CHARGE PUMP DC-TO-DC CONVERTER
FEATURES
s Wide Operating Range ............................. 3V to 18V
s Increased Output Current .............................. 40mA
s Pin Compatible with ICL7662/SI7661/TC7660/
LTC1044
s No External Diodes Required
s Low Output Impedance @ IL = 20mA ....... 40Ω Typ.
s No Low-Voltage Terminal Required
s CMOS Construction
ORDERING INFORMATION
Part No.
TC7662ACPA
TC7662AEPA
TC7662AIJA
TC7662AMJA
TC7660EV
Package
Temperature
Range
8-Pin Plastic DIP
0°C to +70°C
8-Pin Plastic DIP – 40°C to +85°C
8-Pin CerDIP
– 25°C to +85°C
8-Pin CerDIP
– 55°C to +125°C
Evaluation Kit for
Charge Pump Family
GENERAL DESCRIPTION
The TC7662A is a pin-compatible upgrade to the In-
dustry standard TC7660 charge pump voltage converter. It
converts a +3V to +18V input to a corresponding – 3V to
-18V output using only two low-cost capacitors, eliminating
inductors and their associated cost, size and EMI. In addi-
tion to a wider power supply input range (3V to 18V versus
1.5V to 10V for the TC7660), the TC7662A can source
output currents as high as 40mA. The on-board oscillator
operates at a nominal frequency of 12kHz. Operation be-
low 10kHz (for lower supply current applications) is also
possible by connecting an external capacitor from OSC to
ground.
The TC7662A directly is recommended for designs
requiring greater output current and/or lower input/output
voltage drop. It is available in 8-pin DIP packages in com-
mercial and extended temperature ranges.
PIN CONFIGURATION
NC 1
C+ 2
8 VDD
7 OSC
GND 3 TC7662A 6 NC
C– 4
5 VOUT
2
3
4
5
FUNCTIONAL BLOCK DIAGRAM
NC = NO INTERNAL CONNECTION
COSC 7
I
Q
+ F/F
C
–Q
COMPARATOR
WITH HYSTERESIS
VREF
TC7662A
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
8 VDD
P SW1
2 CAP+
N SW4
+
CP
EXT
GND
3
N SW2
+
OUT
CR
EXT
4 CAP–
RL
6
7
LEVEL
SHIFT
N SW3
5
VOUT
8
TELCOM SEMICONDUCTOR, INC.
TC7662A-5 9/11/96
4-77
1 page  
CHARGE PUMP
DC-TO-DC CONVERTER
1
TYPICAL CHARACTERISTICS
Supply Current vs. Temperature
700
600
500
400 V + = 15V
300
200 V+ = 5V
100
0
–60 –40 –20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Frequency vs. Temperature
20
18
16
14
12
10
8
6
–60 –40 –20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
Power Conversion Efficiency vs. I LOAD
110 165
100 150
90 135
80 EFFICIENCY
120
70 105
60 90
50
SUPPLY
75
40
CURRENT
60
30 45
20 30
10 TA = +25°C 15
0
0 8 16 24 32 40 48 56 64 72 80
LOAD CURRENT (mA)
TELCOM SEMICONDUCTOR, INC.
TC7662A
Oscillator Frequency vs. CEXT
TA = +25°C
10k
2
1k
3
100
10
1
10
100
1000
10,000
CAPACITANCE (pF)
Output Resistance vs. Temperature
160
140
120 V += 5V, IL = 3 mA
100
80
60
40 V+ = 15V, IL = 20 mA
20
–60 –40 –20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
4
5
6
Output Resistance vs. Input Voltage
110
100 TA = +25°C
90
80
70
60 20 mA
50
40
30
20
10
0 2 4 6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
7
8
4-81
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet TC7662AIJA.PDF ] | |
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