Home
Design & development
Reference designs

PMP21884

Tiny, ultra-low IQ DC/DC power supply with battery charging reference design for wearables

Design files

PMP21884

Design files

Overview

This is a highly-integrated power supply reference design for smartwatches and fitness trackers enabling ultra-low IQ that is ultra-small (48 sq mm). Supply includes seven power rails 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 (48 mm²) total footprint power supply
  • 400-nA IQ linear battery charge management with fast charge, LDO, load switch, ADC, over-voltage and over-current protection
  • Selectable, integrated boost rail for PMOLED display or heart-rate monitor LED driver
  • Seven rails for various peripherals:
    • 1.8 V at 1 A
    • 1.8 V at 0.3 A
    • 1.8 V at 0.1 A
    • 1.8 V at 0.1 A
    • 1.2 V at 0.2 A
    • 12 V at 0.06 A or
    • 5 V at 0.150 A
Output voltage options PMP21884.1 PMP21884.2 PMP21884.3 PMP21884.4 PMP21884.5 PMP21884.6 PMP21884.7
Vin (Min) (V) 3 3 3 3 3 3 3
Vin (Max) (V) 6 6 6 6 6 6 6
Vout (Nom) (V) 1.8 1.2 1.8 1.8 1.8 1.8 12
Iout (Max) (A) .01 .2 .1 1 .3 .1 .06
Output Power (W) .018 .24 .18 1.8 .54 .18 .72
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC DC DC DC
Topology Linear Regulator Linear Regulator Linear Regulator Buck- Integrated Switch Buck- Integrated Switch Load Share Boost- Integrated Switch
??image.gallery.download_en_US?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Test report — PMP21884
TIDT103.PDF (1604 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

download Schematic — PMP21884
TIDRZK6.PDF (143 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — PMP21884
TIDRZK7.PDF (57 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Assembly drawing — PMP21884
TIDRZK8.PDF (80 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — PMP21884
TIDRZL0.ZIP (607 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — PMP21884
TIDCFF7.ZIP (658 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — PMP21884
TIDRZK9.PDF (882 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

TPS62770 — Tiny Single-chip Dual Solution with 360nA Iq Buck and up to 15V Boost in WCSP

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS62802 — 1.75-V to 5.5-V input, 1-A ultra-low IQ step-down converter in 0.7-mm x 1.05-mm chip scale package

Data sheet: PDF | HTML
Battery charger ICs

BQ25150 — I2C controlled 500-mA linear battery charger with Power Path,  Low Iq, integrated LDO and 16-bit ADC

Data sheet: PDF | HTML
ESD protection diodes

TPD1E6B06 — 6pF ±5V ±15kV ESD protection diode in 0201 package

Data sheet: PDF | HTML
ESD protection diodes

TPD2E001-Q1 — Automotive Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with VCC pin for USB 2.0

Data sheet: PDF
Linear & low-dropout (LDO) regulators

TPS7A05 — 200mA, ultra-low-IQ, high-accuracy, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Test report Tiny, Ultra-Low Iq DC-DC Power Supply With Battery Charging Reference Design Apr. 22, 2019

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​

Videos
Disclaimer
See the important notice and disclaimer covering reference designs and other TI resources.