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 |
- For all available packages, see the orderable addendum at the end of this document.
4 Revision History
Changes from C Revision (December 2015) to D Revision
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Added device TPS610987 Go
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Added TPS610987DSE in the Device Comparison Table.Go
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Added TPS610987 device to Electrical Characteristics table. Go
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Changed devices listed in the Conditions notes From:: TPS61098, '1, '5, '6 To: TPS61098, '1, '5, '6, '7 on graphs affected by adding TPS610987 device. Go
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Changed devices listed in the Conditions note From:: TPS61098 To: TPS61098, '7 in Figure 18, and Figure 19Go
Changes from B Revision (July 2015) to C Revision
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Added devices TPS610985 and TPS610986 to the data sheetGo
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Removed "Product Preview from devices TPS610985DSE and TPS610986DSE in the Device Comparison TableGo
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Added RDS(on)_LS for device TPS610985 and TPS610986 in the Electrical Characteristics Go
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Added RDS(on)_HS for device TPS610985 and TPS610986 in the Electrical Characteristics Go
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Added R(LS) for device TPS610985 and TPS610986 in the Electrical Characteristics Go
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Added V(MAIN) for device TPS610985 and TPS610986 in the Electrical Characteristics Go
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Added V(PSTH) for device TPS610985 and TPS610986 in the Electrical Characteristics Go
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Changed devices listed in the Conditions notes From: TPS61098/TPS610981 To: TPS61098, '1, '5, '6 in Figure 1 and Figure 2Go
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Added Figure 13 to Figure 16 Go
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Added Figure 24 to Figure 27Go
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Added Figure 34 to Figure 37Go
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Added Figure 47 to Figure 48Go
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Added a paragraph to the Capacitor Selection section: "For load switch version,..." Go
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Added Figure 65, Figure 66, and Figure 67 Go
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Added Figure 80Go
Changes from A Revision (July 2015) to B Revision
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Added devices TPS610985DSE and TPS610986DSE to the Device Comparison TableGo
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Added device TPS610982 to the Electrical CharacteristicsGo
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Added Figure 3 and Figure 4Go
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Added Figure 11 and Figure 12Go
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Added Figure 22 and Figure 23Go
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Added Figure 32 and Figure 33Go
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Added Figure 40 and Figure 41Go
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Added Figure 45 and Figure 46Go
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Added Figure 51 and Figure 52Go
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Added text to the Overview section: "The TPS610982 is an exception..."Go
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Added text to the Low Power Mode Section: "The TPS610982 is an exception..."Go
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Added Figure 88, Figure 89, Figure 90 and Figure 92Go
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Added Figure 94 and Figure 95Go
Changes from * Revision (June 2015) to A Revision
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Changed text in the Description From: "can achieve 80% efficiency" To: " can achieve up to 88% efficiency"Go
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Changed "LDO / LS CRTL" with LDO / LS CTRL" and 4.7 µF To 4.7 µH in the Simplified SchematicGo
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Changed VIN = 1.2 V To VIN = 1.5 V and VIN = 2 V to VIN = 2.5 V in Figure 19 Go
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Changed "Boost Efficiency" To: "Boost Output Voltage" in Figure 28 To Figure 31Go
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Changed text "below the programmed threshold," To: "below the programmed threshold with a hysteresis," in Thermal ShutdownGo
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Changed text "unstable operation at IC temperatures at the overtemperature threshold." To: "unstable operation at the overtemperature threshold." in Thermal ShutdownGo
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Changed text "sense or transfer signals" To: sense or transmit signals" in VMAIN to Power MCU and VSUB to Power Subsystem Go
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Changed 4.7 µF To 4.7 µH in Figure 57Go
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Changed text "TPS610981 enters into sleep mode" To: "TPS610981 enters into Low Power mode" in Control Sequence Go
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Changed 4.7 µF To 4.7 µH in Figure 81Go
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Changed text "a boost converter and an LDO are needed: To: "a boost converter with an LDO is needed" in Figure 85Go
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Changed 4.7 µF To 4.7 µH in Figure 85Go