TPS60211

Features:

Regulated 3.3-V Output Voltage From a 1.8-V to 3.6-V Input Voltage Range
UltraLow Operating Current in Snooze Mode, Typical 2 A With up to 2-mA Output Current
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-A Quiescent Current
Easy-To-Design, Low Cost, Low EMI Power Supply Since No Inductors Are Used
Compact Converter Solution in UltraSmall 10-Pin MSOP With Only Four External Capacitors Required
Evaluation Module Available (TPS60210EVM-167)

Application

Replaces DC/DC Converters With Inductors in Battery-Powered Applications Like:
    − Two Battery Cells to 3.3-V Conversion
    − MSP430 Ultralow-Power Microcontroller and Other Battery Powered Microprocessor Systems
    − Glucose Meters and Other Medical Instruments
    − MP3 Portable Audio Players
    − Backup-Battery Boost Converters
    − Cordless Phones, PDAs 


Specifications

Voltage range: IN, OUT, SNOOZE, LBI, LBO, PG to GND. . . . −0.3 V to 3.6 V
                        C1+, C2+ to GND .. . . . . . . . . . . . . . . −0.3 V to (VO + 0.3 V)
                        C1−, C2− to GND . . . . . .. . . . . . . . . . . −0.3 V to (VI + 0.3 V)
Continuous total power dissipation . . . . . . . . . See Dissipation Rating Table
Continuous output current: TPS60210, TPS60211 . . . . . . . . . . . . . . 150 mA
TPS60212, TPS60213 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 mA
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . −55°C to 150°C
Maximum junction temperature, T_J .  . . . . . . . . . . . . . . . . . . . . . . . . . 150°C


Description

The TPS6021x step-up, regulated charge pumps generate a 3.3-V ±4% output voltage from a 1.8-V to 3.6-V input voltage. TPS6021x are typically powered by two alkaline, NiCd, or NiMH battery cells or by one primary lithium MnO2 (or similar) coin cell and operate down to a minimum supply voltage of 1.6 V. Continuous output current is a minimum of 100 mA for the TPS60210 and TPS60211, and 50 mA for the TPS60212 and TPS60213,all from a 2-V input.

Three operating modes of TPS6021x can be programmed using the SNOOZE pin. When SNOOZE is low, the device is put into snooze mode. In snooze mode, the device operates with a typical quiescent current of 2 A while the output voltage is maintained at 3.3 V ±6%. This is lower than the self-discharge current of most batteries. Load current in snooze mode is limited to 2 mA. When SNOOZE is high, the TPS6021x is put into normal operating mode. During normal operating mode, the device operates in the newly developed linskip mode where it 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 current threshold of about 7 mA. In this mode, the device perates from the internal oscillator. The TPS6021x is synchronized to an external clock signal if SNOOZE is clocked; thus switching harmonics can be controlled and minimized.