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TC1219 Datasheet(PDF) 1 Page - Microchip Technology

No. de pieza TC1219
Descripción Electrónicos  Switched Capacitor Voltage Converters with Shutdown in SOT Packages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1219 Datasheet(HTML) 1 Page - Microchip Technology

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 2002 Microchip Technology Inc.
DS21366B-page 1
M TC1219/TC1220
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
Package Type
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 1
µA 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 60
µA (TC1219), 115µA (TC1220).
All devices are available in 6-pin SOT-23A surface
mount packages.
Functional Block Diagram
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
C+
C–
TC1219ECH
TC1220ECH
12
3
54
VIN
SHDN
GND
6-Pin SOT-23A
NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74
OUT
6
TC1219
TC1220
VIN
V–
Output
C+
C–
C1
C2
Input
GND
OUT
SHDN
ON
OFF
+
+
Negative Voltage Inverter
Switched Capacitor Voltage Converters with Shutdown in SOT Packages


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