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Reference Design
TPS61098, TPS610981 TPS610982, TPS610985, TPS610986, TPS610987
SLVS873D – JUNE 2015 – REVISED APRIL 2016
TPS61098x Ultra-Low Quiescent Current Synchronous Boost with Integrated LDO/Load Switch
1 Features
•1 300 nA Ultra-Low IQ in Low Power mode • Startup into Load at 0.7 V Input Voltage • Operating Input Voltage from 0.7 V to 4.5 V • Selectable Output Voltages Up to 4.3 V • Minimum 350 mA Switch Peak Current Limit • Integrated LDO/Load Switch • Two Modes Controlled by MODE Pin
– Active Mode: Dual Outputs at Set Values – Low Power Mode: LDO/Load Switch Off; Boost
Keeps On • Automatic Pass-Through • Up to 88% Efficiency at 10 µA Load from 2 V to
3.3 V Conversion (Low Power Mode) • Up to 93% Efficiency at 5 mA ~ 100 mA Load
from 2 V to 3.3 V Conversion • 1.5 mm x 1.5 mm WSON Package
2 Applications
• Smart Remote Control • BLE Tag • Wearable Applications • Low Power Wireless Applications • Portable Consumer or Medical Products • Single Coin Cell, Single or Two-Cell Alkaline
Powered Applications
3 Description
The TPS61098x is an ultra low power solution for products powered by either a one-cell or two-cell alkaline, NiCd or NiMH, one-cell coin cell or one-cell Li-Ion or Li-polymer battery. It integrates either a Lowdropout Linear Regulator (LDO) or a load switch with a boost converter and provides two output rails. The boost output V(MAIN) is designed as an always-on supply for a main system, and the LDO or load switch output V(SUB) is to power peripheral devices.
The TPS61098x has two modes controlled by MODE pin: Active mode and Low Power mode. In Active mode, both outputs are enabled with enhanced response performance. In Low Power mode, the LDO or load switch is disabled to disconnect peripherals. The TPS61098x consumes only 300 nA quiescent current and can achieve up to 88% efficiency at 10 µA load in Low Power mode.
The TPS61098x supports automatic pass-through function. When input voltage is higher than a passthrough threshold, the boost converter stops switching and passes the input voltage to VMAIN rail; when input voltage is lower than the threshold, the boost works in boost mode and regulates output at the target value. The TPS61098x provides different versions for different output set values.
The TPS61098x can provide up to 50 mA total output current at 0.7 V input to 3.3 V output conversion. The boost is based on a hysteretic controller topology using synchronous rectifier to obtain maximum efficiency at minimal quiescent current.
The TPS61098x is available in 1.5 mm x 1.5 mm WSON package to enable small circuit layout size.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61098x
6 pin WSON
1.50 mm x 1.50 mm
(1) For all available packages, see the orderable addendum at the end of this document.
0.7 V to 4.5 V
CBAT 10µ F
Simplified Schematic
L 4.7µ H
SW
RIN 400
VIN
CIN 0.1µ F
MODE
BOOST CTRL
LDO / LS CTRL
VMAIN VSUB GND
CO1 10µ F
CO2 10µ F
Copyright © 2016, Texas Instruments Incorporated
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.
TPS61098, TPS610981 TPS610982, TPS610985, TPS610986, TPS610987
SLVS873D – JUNE 2015 – REVISED APRIL 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 4 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5 7.2 ESD Ratings.............................................................. 5 7.3 Recommended Operating Conditions....................... 5 7.4 Thermal Information .................................................. 5 7.5 Electrical Characteristics........................................... 6 7.6 Typical Characteristics .............................................. 8 8 Detailed Description ............................................ 17 8.1 Overview ................................................................. 17 8.2 Functional Block Diagrams ..................................... 17 8.3 Feature Description................................................. 18
8.4 Device Functional Modes........................................ 20 9 Applications and Implementation ...................... 22
9.1 Application Information............................................ 22 9.2 Typical Applications ........................