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ADP5304 Datasheet

Ultralow Power Step-Down Regulator

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ADP5304 pdf
Data Sheet
Ultralow Power Step-Down Regulator
for Energy Harvesting
ADP5304
FEATURES
Input supply voltage range: 2.15 V to 6.50 V
Operation down to 2.00 V typical
Ultralow, 260 nA typical quiescent current with no load
Selective output voltage from 1.2 V to 3.6 V (or 0.8 V to 5.0 V)
±2.5% output accuracy over the full temperature range
Output current up to 50 mA in hysteresis mode
VINOK flag to monitor the input voltage
100% duty cycle operation mode
Quick output discharge (QOD) option
Undervoltage lockout (UVLO), overcurrent protection (OCP),
and thermal shutdown (TSD) protection
10-lead, 3 mm × 3 mm LFCSP package
−40°C to +125°C operating junction temperature range
APPLICATIONS
Energy (gas, water) metering
Energy harvesting applications
Portable and battery-powered equipment
Medical applications
Keep-alive power supply
TYPICAL APPLICATION CIRCUIT
VIN = 2.15V TO 6.5V
10µF
PVIN
SW
ADP5304
ON
OFF
EN
PGND
2.2µH
10µF
VOUT
MODE
NC
AGND
FB
VINOK
VID
EPAD
VID0: 1.2V VID8: 2.5V
VID1: 1.5V VID9: 2.6V
R0
VID2: 1.8V
VID3: 2.0V
VID10: 2.7V
VID11: 2.8V
VID4: 2.1V VID12: 2.9V
VID5: 2.2V VID13: 3.0V
VID6: 2.3V VID14: 3.3V
VID7: 2.4V VID15: 3.6V
Figure 1.
GENERAL DESCRIPTION
The ADP5304 is a high efficient, ultralow quiescent current
step-down regulator that draws only 260 nA of quiescent
current to regulate the output at no load.
The ADP5304 runs from an input voltage range of 2.15 V to
6.50 V, allowing the use of the multiple alkaline, NiMH, and
Lithium cells, or the use of a high impedance power source. The
output voltage is selectable from 0.8 V to 5.0 V by an external
VID resistor to ground. The total solution requires only four
tiny external components.
The ADP5304 operates in hysteresis mode via connecting the
MODE pin to ground. In hysteresis mode, the regulator
achieves excellent efficiency at a power of less than 1 mW and
provides up to 50 mA of output load. The device enables very
efficient power management to achieve the collection of small
amounts of energy from the high impedance battery or the
energy harvester to charge up the conventional capacitor or
super capacitor.
The ADP5304 integrates an ultralow power comparator with a
factory programmable voltage reference to monitor the voltage
of the input power source. The voltage reference, with hysteresis, is
the threshold for the stopping and the starting of the switching,
allowing the use of the high impedance power source.
Other key features of the ADP5304 include separate enabling
and a QOD. Safety features, such as OCP, TSD, and input
UVLO are also included.
The ADP5304 is available in 10-lead, 3 mm × 3 mm LFCSP
package rated for the −40°C to +125°C junction temperature range.
Rev. 0
Document Feedback
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADP5304 Datasheet

Ultralow Power Step-Down Regulator

No Preview Available !

ADP5304 pdf
ADP5304
TABLE OF CONTENTS
Features .............................................................................................. 1 
Applications....................................................................................... 1 
Typical Application Circuit ............................................................. 1 
General Description ......................................................................... 1 
Revision History ............................................................................... 2 
Detailed Functional Block Diagram .............................................. 3 
Specifications..................................................................................... 4 
Absolute Maximum Ratings............................................................ 5 
Thermal Resistance ...................................................................... 5 
ESD Caution.................................................................................. 5 
Pin Configuration and Function Descriptions............................. 6 
Typical Performance Characteristics ............................................. 7 
Theory of Operation ...................................................................... 11 
Buck Regulator Operational Mode .......................................... 11 
Adjustable and Fixed Output Voltages .................................... 11 
Undervoltage Lockout (UVLO) ............................................... 11 
Enable/Disable ............................................................................ 11 
VINOK Function........................................................................ 11 
REVISION HISTORY
10/15—Revision 0: Initial Version
Data Sheet
Current Limit.............................................................................. 12 
Short-Circuit Protection............................................................ 12 
Soft Start ...................................................................................... 12 
Startup with Precharged Output .............................................. 12 
100% Duty Operation................................................................ 12 
Active Discharge......................................................................... 12 
Thermal Shutdown .................................................................... 12 
Applications Information .............................................................. 13 
External Component Selection ................................................ 13 
Selecting the Inductor................................................................ 13 
Output Capacitor........................................................................ 13 
Input Capacitor........................................................................... 14 
Layout Recommendations ........................................................ 14 
Typical Application Circuits ......................................................... 15 
Factory Programmable Options ................................................... 16 
Outline Dimensions ....................................................................... 17 
Ordering Guide .......................................................................... 17 
Rev. 0 | Page 2 of 17


Part Number ADP5304
Description Ultralow Power Step-Down Regulator
Maker Analog Devices
Total Page 17 Pages
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