TC7662B Datasheet, PDF (1/9 Pages) TelCom Semiconductor, Inc – CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER

EVALUATION
KIT
AVAILABLE
1
TC7662B
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
FEATURES
2
GENERAL DESCRIPTION
s Wide Operating Voltage Range: 1.5V to 15V
s Boost Pin (Pin 1) for Higher Switching Frequency
s High Power Efficiency is 96%
s Easy to Use – Requires Only 2 External Non-Critical
Passive Components
s Improved Direct Replacement for Industry Stan-
dard ICL7660 and Other Second Source Devices
APPLICATIONS
s Simple Conversion of +5V to ±5V Supplies
s Voltage Multiplication V_OUT = ±nV_IN
s Negative Supplies for Data Acquisition Systems
and Instrumentation
s RS232 Power Supplies
s Supply Splitter, V_OUT = ±V_S/2
The TC7662B is a pin-compatible upgrade to the Indus-
try standard TC7660 charge pump voltage converter. It
converts a +1.5V to +15V input to a corresponding – 1.5 to
– 15V output using only two low-cost capacitors, eliminating
inductors and their associated cost, size and EMI.
3 ^{The on-board oscillator operates at a nominal fre-}
quency of 10kHz. Frequency is increased to 35kHz when
pin 1 is connected to V+, allowing the use of smaller external
capacitors. Operation below 10kHz (for lower supply current
applications) is also possible by connecting an external
capacitor from OSC to ground (with pin 1 open).
The TC7662B is available in both 8-pin DIP and 8-pin
small outline (SO) packages in commercial and extended
temperature ranges.
4
ORDERING INFORMATION
PIN CONFIGURATION (DIP and SOIC)
BOOST 1
8 V+
BOOST 1
8 V+
CAP ⁺ 2
7 OSC
CAP ⁺ 2
7 OSC
GND
3
TC7662BCPA
TC7662BEPA
6
LOW
VOLTAGE (LV)
CAP ^– 4
5 VOUT
GND
3
TC7662BCOA
TC7662BEOA
6
LOW
VOLTAGE (LV)
CAP ^– 4
5 VOUT
Part No.
TC7662BCOA
TC7662BCPA
TC7662BEOA
TC7662BEPA
TC7660EV
Package
Temperature
Range
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
8-Pin SOIC
0°C to +70°C
– 40°C to +85°C
5
8-Pin Plastic DIP – 40°C to +85°C
Evaluation Kit for
Charge Pump Family
FUNCTIONAL BLOCK DIAGRAM
V ⁺ CAP ⁺
6
8
2
1
BOOST
OSC
7
RC
OSCILLATOR
÷2
6
LV
INTERNAL
VOLTAGE
REGULATOR
TC7662B
VOLTAGE–
LEVEL
TRANSLATOR
4
CAP ^–
5
VOUT
LOGIC
NETWORK
7
3
GND
TELCOM SEMICONDUCTOR, INC.
8
TC7662B-8 9/11/96
4-83