TPS61098_15 Datasheet, PDF (1/38 Pages) Texas Instruments – TPS61098x Ultra-Low Quiescent Current Synchronous Boost with Integrated LDO/Load Switch

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TPS61098, TPS610981, TPS610982
SLVS873B – JUNE 2015 – REVISED JULY 2015
TPS61098x Ultra-Low Quiescent Current Synchronous Boost with Integrated LDO/Load
Switch
1 Features
•1 300 nA Ultra-Low I_Q 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 Low-
dropout 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 pass-
through 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.
0.7V to 4.5V
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
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.