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PDF ( 数据手册 , 数据表 ) TC1044S

零件编号 TC1044S
描述 CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
制造商 TelCom Semiconductor
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TC1044S 数据手册, 描述, 功能
EVALUATION
KIT
AVAILABLE
1
TC1044S
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
FEATURES
s Converts +5V Logic Supply to ±5V System
s Wide Input Voltage Range .................... 1.5V to 12V
s Efficient Voltage Conversion ......................... 99.9%
s Excellent Power Efficiency ............................... 98%
s Low Power Consumption ............ 80µA @ VIN = 5V
s Low Cost and Easy to Use
— Only Two External Capacitors Required
s RS-232 Negative Power Supply
s Available in 8-Pin Small Outline (SOIC) and 8-Pin
Plastic DIP Packages
s Improved ESD Protection ..................... Up to 10kV
s No External Diode Required for High Voltage
Operation
s Frequency Boost Raises FOSC to 45kHz
GENERAL DESCRIPTION
The TC1044S is a pin-compatible upgrade to the Indus-
try standard TC7660 charge pump voltage converter. It
converts a +1.5V to +12V input to a corresponding –1.5V
to –12V output using only two low cost capacitors, eliminat-
ing inductors and their associated cost, size and EMI.
Added features include an extended supply range to 12V,
and a frequency boost pin for higher operating frequency,
allowing the use of smaller external capacitors.
The on-board oscillator operates at a nominal frequency
of 10kHz. Frequency is increased to 45kHz when pin 1 is
connected to V+. Operation below 10kHz (for lower supply
current applications) is possible by connecting an external
capacitor from OSC to ground (with pin 1 open).
The TC1044S is available in both 8-pin DIP and
8-pin small outline (SOIC) packages in commercial and
extended temperature ranges.
2
3
4
PIN CONFIGURATION (DIP and SOIC)
BOOST 1
8 V+
CAP + 2
7 OSC
GND
TC1044SCPA
3 TC1044SEPA 6
LOW
VOLTAGE (LV)
CAP
4
TC1044SIJA
TC1044SMJA
5
VOUT
BOOST 1
8 V+
CAP + 2
7 OSC
GND
3 TC1044SCOA 6
TC1044SEOA
LOW
VOLTAGE (LV)
CAP 4
5 VOUT
FUNCTIONAL BLOCK DIAGRAM
1
BOOST
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC1044SCOA
TC1044SCPA
TC1044SEOA
TC1044SEPA
TC1044SIJA
TC1044SMJA
TC7660EV
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
8-Pin SOIC
– 40°C to +85°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
Charge Pump Family Evaluation Kit
V + CAP +
82
5
6
7
OSC
RC
OSCILLATOR
6
LV
2
INTERNAL
VOLTAGE
REGULATOR
TC1044S
TELCOM SEMICONDUCTOR, INC.
VOLTAGE–
LEVEL
TRANSLATOR
3
GND
4 CAP
5 VOUT
7
LOGIC
NETWORK
8
TC1044S-12 9/16/96
4-43







TC1044S pdf, 数据表
CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER
TC1044S
TYPICAL CHARACTERISTICS (Cont.)
Output Source Resistance vs. Supply Voltage
100
70
50
30
Output Source Resistance vs. Temperature
100
80 VIN = 2.5V
60
VIN = 5.5V
40
IOUT = 20mA
TA = 25°C
10
1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12
SUPPLY VOLTAGE (V)
20
0-40 -20 0
20 40 60
TEMPERATURE (°C)
80 100
Output Voltage vs. Output Current
0
-2
-4
-6
-8
-10
-120 10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
Power Conversion Efficiency vs. Load
100
90
Boost Pin = Open
80 Boost Pin = V+
70
60
50
40
30
20
10
0
LOAD CURRENT (mA)
Supply Current vs. Temperature
200
175
150
125
100 VIN = 12.5V
75
50
VIN = 5.5V
25
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
4-50 TELCOM SEMICONDUCTOR, INC.














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