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bq25504 Datasheet

ultra low-power boost converter

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bq25504
SLUSAH0E – OCTOBER 2011 – REVISED MARCH 2019
bq25504 ultra low-power boost converter with battery management for energy harvester
applications
Not Recommended for New Designs
1 Features
1 Ultra Low-Power With High-Efficiency DC-DC
Boost Converter/Charger
– Continuous Energy Harvesting From Low-Input
Sources: VIN 130 mV (Typical)
– Ultra-Low Quiescent Current: IQ < 330 nA
(Typical)
– Cold-Start Voltage: VIN 600 mV (Typical)
• Programmable Dynamic Maximum Power Point
Tracking (MPPT)
– Integrated Dynamic Maximum Power Point
Tracking for Optimal Energy Extraction From a
Variety of Energy Generation Sources
– Input Voltage Regulation Prevents Collapsing
Input Source
• Energy Storage
– Energy Can be Stored to Rechargeable Li-ion
Batteries, Thin-film Batteries, Super-
Capacitors, or Conventional Capacitors
• Battery Charging and Protection
– User Programmable Undervoltage and
Overvoltage Levels
– On-Chip Temperature Sensor With
Programmable Overtemperature Shutoff
• Battery Status Output
– Battery Good Output Pin
– Programmable Threshold and Hysteresis
– Warn Attached Microcontrollers of Pending
Loss of Power
– Can be Used to Enable or Disable System
Loads
2 Applications
• Energy Harvesting
• Solar Chargers
• Thermal Electric Generator (TEG) Harvesting
• Wireless Sensor Networks (WSNs)
• Industrial Monitoring
• Environmental Monitoring
• Bridge and Structural Health Monitoring (SHM)
• Smart Building Controls
• Portable and Wearable Health Devices
• Entertainment System Remote Controls
3 Description
The bq25504 device is the first of a new family of
intelligent integrated energy harvesting nano-power
management solutions that are well suited for
meeting the special needs of ultra low power
applications. The device is specifically designed to
efficiently acquire and manage the microwatts (µW)
to miliwatts (mW) of power generated from a variety
of DC sources like photovoltaic (solar) or thermal
electric generators. The bq25504 is the first device of
its kind to implement a highly efficient boost
converter/charger targeted toward products and
systems, such as wireless sensor networks (WSNs)
which have stringent power and operational
demands. The design of the bq25504 starts with a
DC-DC boost converter/charger that requires only
microwatts of power to begin operating.
Once started, the boost converter/charger can
effectively extract power from low-voltage output
harvesters such as thermoelectric generators (TEGs)
or single- or dual-cell solar panels. The boost
converter can be started with VIN as low as 600 mV,
and once started, can continue to harvest energy
down to VIN = 130 mV.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq25504
VQFN (16)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Solar Application Circuit
Solar +
Cell
-
CHVR
LBST CFLTR
CSTOR
Battery
VSTOR
16 15 ` 14
LBST VSTOR
1 VSS
VBAT
13
VSS
AVSS 12
ROC 2
ROC 1
CREF
2 VIN_DC
VBAT_OK 11
bq25504
3 VOC_SAMP
OK_PROG 10
4 VREF_SAMP
OK_HYST 9
OT_PROG VBAT_OV VRDIV VBAT_UV
56 78
SYSTEM
LOAD
VBAT_OK
ROK1
ROK2
ROK3
ROV2
ROV1
RUV 2
RUV 1
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.




etcTI

bq25504 Datasheet Preview

bq25504 Datasheet

ultra low-power boost converter

No Preview Available !

Not Recommended for New Designs
bq25504
SLUSAH0E – OCTOBER 2011 – REVISED MARCH 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 4
6 Pin Configuration and Functions ......................... 5
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ..................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions....................... 6
7.4 Thermal Information .................................................. 7
7.5 Electrical Characteristics........................................... 7
7.6 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 11
8.1 Overview ................................................................. 11
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 12
8.4 Device Functional Modes........................................ 15
9 Application and Implementation ........................ 18
9.1 Application Information............................................ 18
9.2 Typical Applications ................................................ 20
10 Power Supply Recommendations ..................... 27
11 Layout................................................................... 27
11.1 Layout Guidelines ................................................. 27
11.2 Layout Example .................................................... 28
11.3 Thermal Considerations ........................................ 28
12 Device and Documentation Support ................. 29
12.1 Device Support...................................................... 29
12.2 Documentation Support ........................................ 29
12.3 Receiving Notification of Documentation Updates 29
12.4 Community Resources.......................................... 29
12.5 Trademarks ........................................................... 29
12.6 Electrostatic Discharge Caution ............................ 29
12.7 Glossary ................................................................ 29
13 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
Changes from Revision D (December 2018) to Revision E
Page
• Changed Feature From: VIN 80 mV (Typical) To: VIN 130 mV (Typical) .......................................................................... 1
• Changed From: VIN as low as 330 mV To: VIN as low as 600 mV in the Description ............................................................ 1
• Changed From: "harvest energy down to VIN = 80 mV." To: "harvest energy down to VIN = 130 mV." in the Description.... 1
• Changed From: "330 mV typical,.." To: "600 mV typical,.." in the second paragraph of the Overview section ................... 11
• Changed Figure 11 .............................................................................................................................................................. 14
• Changed From: "VIN(CS) = 330 mV typical." To: "VIN(CS) = 600 mV typical." in the second paragraph of the Cold-
Start Operation section......................................................................................................................................................... 16
Changes from Revision C (June 2015) to Revision D
Page
• Changed Feature From: Cold-Start Voltage: VIN 330 mV (Typical) To: Cold-Start Voltage: VIN 600 mV (Typical) ........ 1
• Changed the RGT Package appearance .............................................................................................................................. 5
• Moved Tstg to the Absolute Maximum Ratings table............................................................................................................... 6
• Changed Handling Ratings To: ESD Ratings......................................................................................................................... 6
• Increased VIN(CS) From: TYP = 330 mV and MAX = 450 mV To: TYP = 600 mV and MAX = 700 mV in Electrical
Characteristics table ............................................................................................................................................................... 7
Changes from Revision B (December 2014) to Revision C
Page
• Changed the Test Condition for PIN(CS) in the Electrical Characteristics ............................................................................... 7
• Changed the values for PIN(CS) in the Electrical Characteristics From: TYP = 10, MAX = 50 To: TYP = 15, MAX
deleted ................................................................................................................................................................................... 7
• Changed CFLTR To: CBYP Figure 14 ..................................................................................................................................... 20
• Changed CBYP = 0.1 µF To: CBYP = 0.01 µF in Detailed Design Procedure .................................................................... 20
• Changed CFLTR To: CBYP in Figure 21 .................................................................................................................................. 23
• Changed CBYP = 0.1 µF To: CBYP = 0.01 µF in Detailed Design Procedure .................................................................... 23
• Changed CFLTR To: CBYP in Figure 28 ................................................................................................................................. 25
2 Submit Documentation Feedback
Product Folder Links: bq25504
Copyright © 2011–2019, Texas Instruments Incorporated


Part Number bq25504
Description ultra low-power boost converter
Maker etcTI
Total Page 30 Pages
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