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TC7662BEOA 参数 Datasheet PDF下载

TC7662BEOA图片预览
型号: TC7662BEOA
PDF下载: 下载PDF文件 查看货源
内容描述: 电荷泵DC - DC电压转换器 [CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER]
分类和应用: 转换器
文件页数/大小: 11 页 / 94 K
品牌: MICROCHIP [ MICROCHIP TECHNOLOGY ]
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EVALUATION
KIT
AVAILABLE
TC7662B
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
FEATURES
s
s
s
s
s
Wide Operating Voltage Range: 1.5V to 15V
Boost Pin (Pin 1) for Higher Switching Frequency
High Power Efficiency is 96%
Easy to Use – Requires Only 2 External Non-Critical
Passive Components
Improved Direct Replacement for Industry Stan-
dard ICL7660 and Other Second Source Devices
GENERAL DESCRIPTION
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.
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.
APPLICATIONS
s
s
s
s
s
Simple Conversion of +5V to
±
5V Supplies
Voltage Multiplication V
OUT
=
±
nV
IN
Negative Supplies for Data Acquisition Systems
and Instrumentation
RS232 Power Supplies
Supply Splitter, V
OUT
=
±
V
S
/2
ORDERING INFORMATION
Part No.
Package
8-Pin SOIC
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
Temperature
Range
0°C to +70°C
0°C to +70°C
– 40°C to +85°C
– 40°C to +85°C
PIN CONFIGURATION
(DIP AND SOIC)
BOOST 1
CAP + 2
8 V+
7 OSC
BOOST 1
CAP + 2
GND 3
CAP – 4
8 V+
7 OSC
TC7662BCOA 6 LOW
VOLTAGE (LV)
TC7662BEOA
5 VOUT
TC7662BCOA
TC7662BCPA
TC7662BEOA
TC7662BEPA
GND 3 TC7662BCPA 6 LOW
VOLTAGE (LV)
TC7662BEPA
– 4
5 VOUT
CAP
TC7660EV
Evaluation Kit for
Charge Pump Family
FUNCTIONAL BLOCK DIAGRAM
V + CAP +
8
BOOST
1
2
OSC
7
RC
OSCILLATOR
÷
2
VOLTAGE–
LEVEL
TRANSLATOR
4
CAP –
LV
6
5
INTERNAL
VOLTAGE
REGULATOR
LOGIC
NETWORK
VOUT
TC7662B
3
GND
© 2001 Microchip Technology Inc.
DS21469A
TC7662B-8 9/11/96