Tiny, ultra-low Iq DC-DC power supply with battery charging reference design for wearables
PMP21884
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Key Document

Description

A highly-integrated power supply reference design for smartwatches and fitness trackers enabling ultra-low Iq in an ultra-small (48sqmm) solution size. Supply includes seven power rails for the system including battery charger, LDO, DC-DC buck converters and integrated boost converter for heart rate monitor AFE LED drive supply or PMOLED bias.

Features
  • Ultra-small (48mm2) total footprint power supply solution
  • 400nA Iq linear battery charge management solution with fast charge, LDO, load switch, ADC and over-voltage/over-current protection
  • Selectable, integrated boost rail for PMOLED display or heart-rate monitor LED driver
  • Seven rails for various peripherals:
    • 1.8V@1A
    • 1.8V@0.3A
    • 1.8V@0.1A
    • 1.8V@0.1A
    • 1.2V@0.2A
    • 12V@0.06A, or
    • 5V@ 0.150A

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Design Files

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Parametrics
 PMP21884.1
(Output Voltage 1)
PMP21884.2
(Output Voltage 2)
PMP21884.3
(Output Voltage 3)
PMP21884.4
(Output Voltage 4)
PMP21884.5
(Output Voltage 5)
PMP21884.6
(Output Voltage 6)
PMP21884.7
(Output Voltage 7)
Vin (Min) (V)3333333
Vin (Max) (V)6666666
Vout (Nom) (V)1.81.21.81.81.81.812
Iout (Max) (A).01.2.11.3.1.06
Output Power (W).018.24.181.8.54.18.72
Isolated/Non-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDCDCDCDCDCDC
TopologyLinear RegulatorLinear RegulatorLinear RegulatorBuck- Integrated SwitchBuck- Integrated SwitchLoad ShareBoost- Integrated Switch

TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ25150  Low IQ linear battery charge management solution with LDO and ADC  Battery management  Sample & Buy View Design Kits & Evaluation Modules
TPD1E6B06  Single-Channel ESD in 0201 Package With 6pF Capacitance and 6V Breakdown  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
TPD2E001-Q1  Automotive Low-Capacitance 2-Channel +/-15kV ESD Protection Array for High-Speed Data Interfaces  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
TPS62770  Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS62802  1.8V-5.5V input, 1-A ultra-low Iq step-down converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A05  1-µA, ultra-low-IQ, 200-mA low-dropout (LDO) regulator in a small-sized package  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25150 Download -
TPD1E6B06 Download -
TPD2E001-Q1 Download Download
TPS62770 Download -
TPS62802 Download -
TPS7A05 Download
Download Download
Download -
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1533 22 Apr 2019
Design files (6)
Title Type Size (KB) Date
ZIP 658 22 Apr 2019
ZIP 607 22 Apr 2019
PDF 882 22 Apr 2019
PDF 80 22 Apr 2019
PDF 57 22 Apr 2019
PDF 143 22 Apr 2019

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