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TC1222ECHTR Datasheet

  • TC1222ECHTR

  • CHARGE, PUMP, CONV, SD, SOT23A-6; Primary Input Voltage:5.5V...

  • 462.70KB

  • 16页

  • Microchip   Microchip 

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M
Features
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TC1221/TC1222
General Description
The TC1221/TC1222 are CMOS 鈥渃harge-pump鈥?/div>
voltage converters in ultra-small 6-Pin SOT-23A
packages. They invert and/or double an input voltage
which can range from +1.8V to +5.5V. Conversion
efficiency is typically 96%. Switching frequency is
125kHz for the TC1221, 750kHz for the TC1222. 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碌A of supply current.
For standard voltage inverter applications, the device
requires only two external capacitors. 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 290碌A (TC1221) and 1800碌A (TC1222).
All devices are available in 6-pin SOT-23A surface
mount packages.
High Frequency Switched Capacitor Voltage Converters
with Shutdown in SOT Packages
Charge Pumps in 6-Pin SOT-23A Package
96% Voltage Conversion Efficiency
Voltage Inversion and/or Doubling
Operates from +1.8V to +5.5V
Up to 25mA Output Current
Only Two External Capacitors Required
Power-Saving Shutdown Mode
Fully Compatible with 1.8V Logic Systems
Applications
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LCD Panel Bias
Cellular Phones
Pagers
PDAs, Portable Data Loggers
Battery-Powered Devices
Device Selection Table
Part
Number
Package
Osc.
Freq.
(kHz)
125
750
Operating
Temp.
Range
-40掳C to +85掳C
-40掳C to +85掳C
Functional Block Diagram
Negative Voltage Inverter
C+
+
C1
C鈥?/div>
V
IN
Input
TC1221ECH 6-Pin SOT-23A
TC1222ECH 6-Pin SOT-23A
TC1221
TC1222
ON
SHDN
OFF
V鈥?/div>
Output
C2
+
Package Type
6-Pin SOT-23A
OUT
C+
6
SHDN
5
GND
4
GND
TC1221ECH
TC1222ECH
1
OUT
2
V
IN
3
C鈥?/div>
NOTE:
6-Pin SOT-23A is equivalent to the EIAJ SC-74
铮?/div>
2002 Microchip Technology Inc.
DS21367B-page 1

TC1222ECHTR 产品属性

  • 3,000

  • 集成电路 (IC)

  • PMIC - 稳压器 - DC DC 开关稳压器

  • -

  • 切换式电容器（充电泵），倍增器，反相

  • 可调式

  • 1

  • -1.8 V ~ -5.5 V，±3.6 V ~ ±11 V

  • 1.8 V ~ 5.5 V

  • -

  • 750kHz

  • 25mA

  • 无

  • -40°C ~ 85°C

  • 表面贴装

  • SOT-23-6

  • 带卷 (TR)

  • SOT-23-6

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