TPS60200

·  Regulated 3.3-V Output Voltage With up to 100 mA Output Current From a 1.8 V to 3.6 V Input Voltage
·  Less Than 5 mV(PP) Output Voltage Ripple Achieved With Push-Pull Topology
·  Integrated Low-Battery and Power-Good Detector
·  Switching Frequency Can Be Synchronized to External Clock Signal
·  Extends Battery Usage With up to 90% Efficiency and 35 mA Quiescent Supply Current
·  Reliable System Shutdown Because Output Capacitor Is Discharged When Device Is Disabled
·  Easy-To-Design, Low Cost, Low EMI Power Supply Since No Inductors Are Used
·  0.05 mA Shutdown Current, Battery Is Isolated From Load in Shutdown Mode
·  Compact Converter Solution in Ultra-Small 10-pin MSOP With Only Four External Capacitors Required
·  Evaluation Module Available (TPS60200EVM-145)

` Replaces DC/DC Converters With Inductors in Battery Powered Applications Like:
  Two Battery Cells to 3.3-V Conversion
  MP3 Portable Audio Players
  Battery-Powered Microprocessor Systems
  Backup-Battery Boost Converters
  PDA's, Organizers, Cordless Phones
  Handheld Instrumentation
  Glucose Meters and Other Medical Instruments

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Voltage range: IN, OUT, EN, LBI, LBO, PG to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 3.6 V
                       C1+, C2+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to (V_O + 0.3 V)
                     C1, C2 to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to (V_I + 0.3 V)
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  See dissipation rating table
Continuous output current TPS60200, TPS60201 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mA
Continuous output current TPS60202, TPS60203 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 mA
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to 150
Maximum junction temperature, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

† Stresses beyond 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 beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

The TPS6020x step-up, regulated charge pumps generate a 3.3-V ± 4% output voltage from a 1.8-V to 3.6-V
input voltage. The devices are typically powered by two Alkaline, NiCd or NiMH battery cells and operate down to a minimum supply voltage of 1.6 V. Continuous output current is a minimum of 100 mA for the TPS60200 and TPS60201 and 50 mA for the TPS60202 and TPS60203, all from a 2-V input. Only four external capacitors are needed to build a complete low-ripple dc/dc converter. The push-pull operating mode of two single-ended charge pumps assures the low output voltage ripple as current is continuously transferred to the output.

The TPS6020x operate in the newly developed LinSkip mode. In this operating mode, the device switches seamlessly from the power saving pulse-skip mode at light loads to the low-noise constant-frequency, linear-regulation mode once the output current exceeds the LinSkip threshold of about 7-mA. Even in pulse-skip mode the output ripple is maintained at a very low level because the output resistance of the charge pump TPS6020x is still regulated.

Three operating modes TPS6020x can be programmed using the EN pin. EN = low disables the device, shuts down all internal circuits and disconnects the output from the input. EN = high enables the device and programs it to run from the internal oscillator. The TPS6020x operate synchronized to an external clock signal if EN is clocked; thus switching harmonics can be controlled and minimized. The TPS6020x include a low-battery detector that issues a warning if the battery voltage drops below a user-defined threshold voltage or a power-good detector that goes active when the output voltage reaches about 90% of its nominal value.

TPS6020x options with either a low-battery or power good detector are available. This dc/dc converter requires no inductors therefore EMI of the system is reduced to a minimum. It is available in the small 10-pin MSOP package (DGS).