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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1219 Datasheet

(TC1220) Switched Capacitor Voltage Converters with Shutdown in SOT Packages

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TC1219 pdf
M TC1219/TC1220
Switched Capacitor Voltage Converters with Shutdown in SOT Packages
Features
• Charge Pumps in 6-Pin SOT-23A Package
• >95% Voltage Conversion Efficiency
• Voltage Inversion and/or Doubling
• Operates from +2.5V to +5.5V
• Up to 25mA Output Current
• Only Two External Capacitors Required
• Low Power Consumption
• Power-Saving Shutdown Mode
• TC1220 Compatible with 1.8V Logic Systems
Applications
• LCD Panel Bias
• Cellular Phones
• Pagers
• PDAs, Portable Dataloggers
• Battery-Powered Devices
Device Selection Table
Part
Number
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC1219ECH 6-Pin SOT-23A 12 -40°C to +85°C
TC1220ECH 6-Pin SOT-23A 35 -40°C to +85°C
Package Type
6-Pin SOT-23A
C+ SHDN GND
6 54
TC1219ECH
TC1220ECH
1
OUT
2
VIN
3
C–
NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74
General Description
The TC1219/TC1220 are CMOS “charge-pump”
voltage converters in ultra-small 6-Pin SOT-23A
packages. They invert and/or double an input voltage
which can range from +2.5V to +5.5V. Conversion
efficiency is typically >95%. Switching frequency is
12kHz for the TC1219, 35kHz for the TC1220. When
the shutdown pin is held at a logic low, the device goes
into a very low power mode of operation, consuming
less than 1µA of supply current.
External component requirement is only two capacitors
for standard voltage inverter applications. With a few
additional components a positive doubler can also be
built. All other circuitry, including control, oscillator,
power MOSFETs are integrated on-chip. Typical supply
currents are 60µA (TC1219), 115µA (TC1220).
All devices are available in 6-pin SOT-23A surface
mount packages.
Functional Block Diagram
Negative Voltage Inverter
C+ VIN
+
C1 TC1219
TC1220
C
Input
ON
SHDN
OFF
GND
OUT
C2
+
V
Output
2002 Microchip Technology Inc.
DS21366B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1219 Datasheet

(TC1220) Switched Capacitor Voltage Converters with Shutdown in SOT Packages

No Preview Available !

TC1219 pdf
TC1219/TC1220
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage (VIN to GND)....................... +6.0V, -0.3V
Output Voltage (OUT to GND).................. -6.0V, +0.3V
Current at OUT Pin..............................................50mA
Short-Circuit Duration OUT to GND ............Indefinite
Power Dissipation (TA 70°C)
6-Pin SOT-23A .........................................240mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature (Unbiased) .......-65°C to +150°C
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.
TC1219/TC1220 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = -40°C to +85°C, VIN = +5V, C1 = C2 = 10µF, (TC1219), C1 = C2 = 3.3µF (TC1220), TA = 25°C
unless otherwise noted.
Symbol
Parameter
Min Typ Max Units
Device
Test Conditions
IDD Supply Current
60 115
115 325
µA TC1219
TC1220
ISHDN
VMIN
VMAX
FOSC
Shutdown Supply Current
Minimum Supply Voltage
Maximum Supply Voltage
Oscillator Frequency
0.1 1.0
µA
2.5
V
— — 5.5
V
6 12 20 kHz TC1219
19 35 56.3
TC1220
SHDN = GND, VIN = 5V (Note 2)
RLOAD = 1k
RLOAD = 1k
VIH SHDN Input Logic High
VIL
PEFF
SHDN Input Logic Low
Power Efficiency
——
1.5
1.8
1.5
— — 0.5
96
95
V
TC1219
TC1220
V
%
RLOAD =
VIN = VMIN to 3V
VIN = >3V to VMAX
VIN = VMIN to VMAX
VIN = VMIN to VMAX
RLOAD = 1k
VEFF
Voltage Conversion Efficiency 95 99.9
%
RLOAD =
ROUT Output Resistance
25 65
TC1219/TC1220 ILOAD = 0.5mA to 25mA (Note 1)
Note 1: Capacitor contribution is approximately 20% of the output impedance [ESR = 1/ pump frequency x capacitance].
2: VIN is guaranteed to be disconnected from OUT when the converter is in shutdown..
DS21366B-page 2
2002 Microchip Technology Inc.


Part Number TC1219
Description (TC1220) Switched Capacitor Voltage Converters with Shutdown in SOT Packages
Maker Microchip Technology
Total Page 16 Pages
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