TCM828

Features:

` Charge Pump in 5-Pin SOT-23A Package
` >95% Voltage Conversion Efficiency
` Voltage Inversion and/or Doubling
` Low 50A (TCM828) Quiescent Current
` Operates from +1.5V to +5.5V
` Up to 25mA Output Current
` Only Two External Capacitors Required

Application

· LCD Panel Bias
· Cellular Phones
· Pagers
· PDAs, Portable Dataloggers
· Battery-Powered Devices

Pinout






Specifications

Input Voltage (V_IN 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
Operating Temperature Range ............... 40°C to +85
Power Dissipation (T_A 70)
5-Pin SOT-23A .......................................................240mW
Storage Temperature (Unbiased) ......... 65°C to +150
Lead Temperature (Soldering, 10 sec) ................. +300

*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Parameter Name	Value
Typical Active Output Current (mA)	25
Output Voltage (V)	Vout = -Vin or Vout = 2Vin
Typical Quiescent Current (A)	50
Input Voltage Range (V)	1.5 to 5.5
Operating Temp. Range (°C)	-45 to 85
Device Description	Inverting or Doubling

Parameter NameValueTypical Active Output Current (mA)25Output Voltage (V)Vout = -Vin or Vout = 2VinTypical Quiescent Current (A)50Input Voltage Range (V)1.5 to 5.5Operating Temp. Range (°C)-45 to 85Device DescriptionInverting or Doubling




Description

The TCM828/829 are CMOS "charge-pump" voltage converters in ultra-small 5-Pin SOT-23A packages. They invert and/or double an input voltage which can range from +1.5V to +5.5V. Conversion efficiency is typically >95%.

Switching frequency is 12kHz for the TCM828 and 35kHz for the TCM829.

External component requirement is only two capacitors (3.3F nominal) 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. Supply current is 50A (TCM828) and 115A (TCM829).

The TCM828 and TCM829 are available in a 5-Pin SOT-23A surface mount package.

The TCM828/829 are CMOS "charge-pump" voltage converters in ultra-small 5-Pin SOT-23A packages. They invert and/or double an input voltage which can range from +1.5V to +5.5V. Conversion efficiency is typically >95%. Switching frequency is 12kHz for the TCM828 and 35kHz for the TCM829. External component requirement is only two capacitors (3.3F nominal) 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. Supply current is 50A (TCM828) and 115A (TCM829). The TCM828 and TCM829 are available in a 5-Pin SOT-23A surface mount package.