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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1044S Datasheet

Charge Pump DC-TO-DC Voltage Converter

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TC1044S pdf
EVALUATION
KIT
AVAILABLE
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.
PIN CONFIGURATION (DIP AND SOIC)
BOOST 1
8 V+
CAP + 2 TC1044SCPA 7 OSC
TC1044SEPA
GND
3
TC1044SIJA 6
TC1044SMJA
LOW
VOLTAGE (LV)
CAP 4
5 VOUT
BOOST 1
8 V+
CAP + 2 TC1044SCOA 7 OSC
GND
3 TC1044SEOA 6
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
7
OSC
RC
OSCILLATOR
6
LV
2
INTERNAL
VOLTAGE
REGULATOR
TC1044S
VOLTAGE
LEVEL
TRANSLATOR
3
GND
4 CAP
5 VOUT
LOGIC
NETWORK
© 2001 Microchip Technology Inc. DS21348A
TC1044S-12 9/16/96


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1044S Datasheet

Charge Pump DC-TO-DC Voltage Converter

No Preview Available !

TC1044S pdf
Charge Pump DC-TO-DC Voltage Converter
TC1044S
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ......................................................... +13V
LV, Boost and OSC Inputs
Voltage (Note 1) ......................... – 0.3V to (V++ 0.3V)
for V+ < 5.5V
(V+ – 5.5V) to (V++ 0.3V)
for V+ > 5.5V
Current Into LV (Note 1) ...................... 20µA for V+ > 3.5V
Output Short Duration (VSUPPLY 5.5V) ......... Continuous
Lead Temperature (Soldering, 10 sec) ................. +300°C
Package Power Dissipation (TA 70°C) (Note 2)
8-Pin CerDIP .................................................. 800mW
8-Pin Plastic DIP ............................................. 730mW
8-Pin SOIC .....................................................470mW
Operating Temperature Range
C Suffix .................................................. 0°C to +70°C
I Suffix ............................................... – 25°C to +85°C
E Suffix ............................................. – 40°C to +85°C
M Suffix ........................................... – 55°C to +125°C
Storage Temperature Range ................ – 65°C to +150°C
*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above those
listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS: TA = +25°C, V+ = 5V, COSC = 0, Test Circuit (Figure 1), unless otherwise
indicated.
Symbol Parameter
Test Conditions
Min Typ Max Unit
I+ Supply Current
RL =
0°C < TA < +70°C
– 40°C < TA < +85°C
– 55°C < TA < +125°C
I+ Supply Current
(Boost Pin = V+)
0°C < TA < +70°C
– 40°C < TA < +85°C
– 55°C < TA < +125°C
VH+ 2
Supply Voltage Range, High
Min TA Max,
RL = 10 k, LV Open
VL+2
Supply Voltage Range, Low
Min TA Max,
RL = 10 k, LV to GND
— 80 160 µA
— — 180
— — 180
— — 200
— — 300 µA
— — 350
— — 400
3 — 12 V
1.5 — 3.5 V
ROUT
Output Source Resistance
IOUT = 20mA
IOUT = 20mA, 0°C TA +70°C
IOUT = 20mA, –40°C TA +85°C
IOUT = 20mA, –55°C TA +125°C
V+ = 2V, IOUT = 3 mA, LV to GND
0°C TA +70°C
– 55°C TA +125°C
— 60 100
— 70 120
— 70 120
— 105 150
— — 250
— — 400
FOSC
Oscillator Frequency
Pin 7 open; Pin 1 open or GND
Boost Pin = V+
— 10 — kHz
— 45 —
PEFF
Power Efficiency
RL = 5 k; Boost Pin Open
TMIN < TA < TMAX; Boost Pin Open
Boost Pin = V+
96 98 — %
95 97 —
— 88 —
VOUT EFF
ZOSC
Voltage Conversion Efficiency
Oscillator Impedance
RL =
V+ = 2V
V+ = 5V
99 99.9 — %
— 1 — M
— 100 — k
NOTES: 1. Connecting any input terminal to voltages greater than V+ or less than GND may cause destructive latch-up. It is recommended that no
inputs from sources operating from external supplies be applied prior to "power up" of the TC1044S.
2. Derate linearly above 50°C by 5.5mW/°C.
TC1044S-12 9/16/96
2 © 2001 Microchip Technology Inc. DS21348A


Part Number TC1044S
Description Charge Pump DC-TO-DC Voltage Converter
Maker Microchip Technology
Total Page 11 Pages
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