Features: 50-mA LDO
Available in 1.5-V, 1.6-V, and 1.8-V
Fixed-Output and Adjustable Versions
Low Input Voltage Requirement
(Down to 1.8 V)
Small Output Capacitor, 0.1-F
Dropout Voltage Typically 50 mV at 50 mA
Less Than 1 A Quiescent Current in
Shutdown Mode
Thermal Protection
Over Current Limitation
5-Pin SOT-23 (DBV) PackageApplicationPortable Communication Devices
Battery Powered Equipment
PCMCIA Cards
Personal Digital Assistants
Modems
Bar Code Scanners
Backup Power Supplies
SMPS Post Regulation
Internet AudioSpecifications
| |
TPS72201, TPS72215
TPS72216, TPS72218 |
Input voltage range |
0.3 V to 7 V |
| Voltage range at EN |
0.3 V to 7 V |
| Voltage on OUT, FB, NC |
0.3 V to VI + 0.3 V
|
| Peak output current |
Internally limited |
| ESD rating, HBM |
3 kV |
| Continuous total power dissipation |
See Dissipation Rating Table |
| Operating virtual junction temperature range, TJ |
40 to 150
|
| Storage temperature range, Tstg |
65 to 150
|
DescriptionThe TPS72218 LDO regulators is available in fixed voltage options that are commonly used to power the latest DSP's and microcontrollers with an adjustable option ranging from 1.22 V to 2.5 V. These regulators can be used in a wide variety of applications ranging from portable, battery-powered equipment to PC peripherals. The TPS72218 features operation over a wide range of input voltages (1.8 V to 5.5 V) and low dropout voltage (50 mV at full load). Therefore, compared tomany other regulators that require 2.5-V or higher input voltages for operation, these regulators can be operated directly from two AAA batteries. Also, the typical quiescent current (ground pin current) is low, starting at 85 A during normal operation and 1 A in shutdown mode. Thus, these regulators TPS72218 can be operated very efficiently and, in a battery-powered application, help extend the longevity of the device.
Similar LDO regulators TPS72218 require 1- F or larger output capacitors for stability. However, this regulator TPS72218 uses an internal compensation scheme that stabilizes the feedback loop over the full range of input voltages and load currents with output capacitances as low as 0.1-F. Ceramic capacitors of this size are relatively inexpensive and available in small footprints.
This family of regulators TPS72218 is particularly suited as a portable power supply solution due to its minimal board space requirement and 1.8-V minimum input voltage.Being able to use two off-the-shelf, AAA, batteries makes system design easier and also reduces component cost. Moreover, the solution of TPS72218 will be more efficient than if a regulator with a higher input voltage is used.
TPS72218 Data Sheet
