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TPS82740B Datasheet Preview

TPS82740B Datasheet

Step-Down Converter

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TPS82740A, TPS82740B
SLVSCE3A – JUNE 2014 – REVISED JUNE 2014
TPS82740x 360-nA IQ MicroSIPTM Step Down Converter Module for Low Power
Applications
1 Features
1 360-nA Typical Quiescent Current
• Up to 90% Efficiency at 10-µA Output Current
• Pin-Selectable Output Voltages in 100-mV Steps
• Integrated Slew Rate Controlled Load Switch
• Up to 200-mA Output Current
• Input Voltage Range VIN from 2.2 V to 5.5 V
• RF Friendly DCS-Control™
• Low Output Voltage Ripple
• Automatic Transition to No Ripple 100% Mode
• Discharge Function on VOUT and LOAD
• Sub 1.1-mm Profile Solution
• Total Solution Size < 6.7mm2
• Small 2.3 mm × 2.9 mm MicroSIP™ Package
2 Applications
Bluetooth® Low Energy, RF4CE, Zigbee
• Wearable Electronics
• Energy Harvesting
3 Description
The TPS82740 is the industry's first step-down
converter module featuring typically 360-nA quiescent
current consumption. It is a complete MicroSIPTM
DC/DC step-down power solution intended for ultra
low-power applications. The module includes the
switching regulator, inductor and input/output
capacitors. The integration of all required passive
components enables a tiny solution size of only 6.7
mm2.
Figure 1. Typical Application
TPS82740
VIN
2.2 V to 5.5 V
ENABLE
VSEL1
VSEL2
VSEL3
DC/DC Converter
L
VIN
SW
CIN
VOUT
GND
EN
VSEL1
VSEL2
VSEL3
LOAD
CTRL
COUT
VOUT
up to 200mA
Switched Supply
RON = 0.6Ω
Control for
Switched
Supply Rail
GND
This new DCS-Control™ based device extends the
light load efficiency range below 10-µA load currents.
It supports output currents up to 200 mA.
The device operates from rechargeable Li-Ion
batteries, Li-primary battery chemistries such as Li-
SOCl2, Li-MnO2 and two or three cell alkaline
batteries. The input voltage range up to 5.5 V also
allows operation from an USB port and thin-film solar
modules.
The output voltage is user selectable by three voltage
select pins (VSEL), within a range from 1.8 V to 2.5 V
(TPS82740A) and 2.6 V to 3.3 V (TPS82740B) in
100-mV steps. The TPS82740 features low output
voltage ripple and low noise. Once the battery voltage
comes close to the output voltage (close to 100%
duty cycle), the device enters no ripple 100% mode
operation preventing an increase of output voltage
ripple. In this case the device stops switching and the
output is connected to the input voltage.
The integrated slew rate controlled load switch with a
typical ON-resistance of 0.6distributes the selected
output voltage to a temporarily used sub-system.
The TPS82740 is available in a small 9-bump 6.7
mm2 MicroSiP™ package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS82740A
µSIP
2.30 mm × 2.90 mm
TPS82740B
µSIP
2.30 mm × 2.90 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
TPS82740B
TPS82740 extends
light load efficiency range
down to 10mA output current
Current
DCS-ControlTM topology
V = 3.6V
IN
V = 3.3V
OUT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




etcTI

TPS82740B Datasheet Preview

TPS82740B Datasheet

Step-Down Converter

No Preview Available !

TPS82740A, TPS82740B
SLVSCE3A – JUNE 2014 – REVISED JUNE 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 ESD Ratings ............................................................ 4
7.3 Recommended Operating Conditions...................... 4
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics.......................................... 5
7.6 Typical Characteristics .............................................. 6
8 Parameter Measurement Information ................ 14
9 Detailed Description ............................................ 15
9.1 Overview ................................................................. 15
9.2 Functional Block Diagram ....................................... 15
9.3 Feature Description................................................. 15
9.4 Device Functional Modes........................................ 17
10 Application and Implementation........................ 20
10.1 Application Information.......................................... 20
10.2 Typical Application ............................................... 20
11 Power Supply Recommendations ..................... 23
12 Layout................................................................... 23
12.1 Layout Guidelines ................................................. 23
12.2 Layout Example .................................................... 23
12.3 Surface Mount Information.................................... 24
13 Device and Documentation Support ................. 25
13.1 Documentation Support ....................................... 25
13.2 Trademarks ........................................................... 25
13.3 Electrostatic Discharge Caution ............................ 25
13.4 Glossary ................................................................ 25
14 Mechanical, Packaging, and Orderable
Information ........................................................... 25
14.1 Tape and Reel Information ................................... 26
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Original (June 2014) to Revision A
Page
• Added 150 mA Typical current specification for ILIM_softstart, Low side MOSFET switch current limit...................................... 6
2
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Copyright © 2014, Texas Instruments Incorporated


Part Number TPS82740B
Description Step-Down Converter
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