Datasheet

1
FEATURES
APPLICATIONS
DESCRIPTION
TPS781DDC
TSOT23-5
(TOPVIEW)
OUT
V /FB
SET
IN
GND
EN
1
2
3
5
4
TPS781DRV
2mmx2mmSON-6
(TOPVIEW)
IN
GND
EN
6
5
4
OUT
N/C
V FB/
SET
1
2
3
Thermal
Pad
TPS781 Series
www.ti.com ........................................................................................................................................................... SBVS102B – MARCH 2008 – REVISED MAY 2008
150mA, Low-Dropout Regulator, Ultralow-Power, I
Q
1 µ A
with Pin-Selectable, Dual-Level Output Voltage
The V
SET
pin allows the end user to switch between
two voltage levels on-the-fly through a
2
• Low I
Q
: 1 µ A
microprocessor-compatible input. This LDO is
• 150mA, Low-Dropout Regulator with
designed specifically for battery-powered applications
Pin-Selectable Dual Voltage Level Output
where dual-level voltages are needed. With ultralow
I
Q
(1 µ A), microprocessors, memory cards, and smoke
• Low Dropout: 200mV at 150mA
detectors are ideal applications for this device.
• 3% Accuracy Over Load/Line/Temperature
The ultralow-power and selectable dual-level output
• Available in Dual-Level, Fixed Output Voltages
voltages allow designers to customize power
from 1.5V to 4.2V Using Innovative Factory
consumption for specific applications. Designers can
EPROM Programming
now shift to a lower voltage level in a battery-powered
• Available in an Adjustable Version from 1.22V
design when the microprocessor is in sleep mode,
to 5.25V or a Dual-Level Output Version
further reducing overall system power consumption.
The two voltage levels are preset at the factory
• V
SET
Pin Toggles Output Voltage Between Two
through a unique architecture using an EPROM. The
Factory-Programmed Voltage Levels
EPROM technique allows for numerous output
• Stable with a 1.0 µ F Ceramic Capacitor
voltage options between V
SET
low (1.5V to 4.2V) and
• Thermal Shutdown and Overcurrent Protection
V
SET
high (2.0V to 3.0V) in the fixed output version
only. Consult with your local factory representative for
• CMOS Logic Level-Compatible Enable Pin
exact voltage options and ordering information;
• Available in DDC (TSOT23-5) or DRV (2mm ×
minimum order quantities may apply.
2mm SON-6) Package Options
The TPS781 series are designed to be compatible
with the TI MSP430 and other similar products. The
enable pin is compatible with standard CMOS logic.
• TI MSP430 Attach Applications
This LDO is stable with any output capacitor greater
• Power Rails with Programming Mode
than 1.0 µ F. Therefore, implementations of this device
• Dual Voltage Levels for Power-Saving Mode
require minimal board space because of miniaturized
• Wireless Handsets, Smartphones, PDAs, MP3 packaging and a potentially small output capacitor.
Players, and Other Battery-Operated Handheld The TPS781 series I
Q
(1 µ A) also come with thermal
Products shutdown and current limit to protect the device
during fault conditions. All packages have an
operating temperature range of T
J
= – 40 ° C to
+125 ° C. For high-performance applications requiring
The TPS781 family of low-dropout (LDO) regulators
a dual-level voltage option, consider the TPS780
offer the benefits of ultralow power (I
Q
= 1 µ A),
series , with an I
Q
of 500nA and dynamic voltage
miniaturized packaging (2 × 2 SON-6), and selectable
scaling.
dual-level output voltage levels. An adjustable version
is also available, but does not have the capability to
shift voltage levels.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.