120 mA Switched Capacitor Voltage Inverter with Regulated Output Data Sheet ADP3605 FEATURES FUNCTIONAL BLOCK DIAGRAM C + C P P Fully regulated adjustable output voltage 1 3 High output current: 120 mA S P D D N S V 8 IN Output accuracy: 3% S1 S3 B 250 kHz switching frequency ADP3605 S N D D N S 7 V Low shutdown current: 2 A typical OUT S2 S4 Input voltage range: 3 V to 6 V 8-Lead SOIC package OSC 40C to +85C ambient temperature range SD 4 CLOCK GEN FEEDBACK CONTROL 5 V SENSE LOOP APPLICATIONS Voltage inverters 2 Voltage regulators GND Computer peripherals and add-on cards Figure 1. Portable instruments Battery powered devices Pagers and radio control receivers Disk drives Mobile phones GENERAL DESCRIPTION The ADP3605 is a 120 mA regulated output, switched capacitor V 8 7 V V 3.0V IN IN OUT voltage inverter. It provides a regulated output voltage with *C + IN *C O C + 1 4.7F P 4.7F + minimum voltage loss and requires a minimum number of *C + external components. In addition, the ADP3605 does not P ADP3605 4.7F require the use of an inductor. R1 3 19k C P Pin-for-pin and functionally compatible with the ADP3604, the 4 5 SD V internal oscillator of the ADP3605 runs at a 500 kHz nominal SENSE OFF GND ON frequency that produces an output switching frequency of 0 2 250 kHz. This allows for the use of smaller charge pump and filter capacitors. *FOR BEST PERFORMANCE, 10F IS RECOMMENDED C : SPRAGUE, 293D475X0010B2W P The ADP3605 provides an accuracy of 3% with a typical C , C : TOKIN, 1E475ZY5UC205F IN O shutdown current of 2 A. It can also operate from a single Figure 2. Typical Application Circuit positive input voltage as low as 3 V. The ADP3605 is adjustable via external resistors over a 3 V to 6 V range. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 19982012 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 11135-002 11135-001ADP3605 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Capacitor Selection .......................................................................9 Applications ....................................................................................... 1 Input Capacitor..............................................................................9 Functional Block Diagram .............................................................. 1 Output Capacitor ..........................................................................9 General Description ......................................................................... 1 Pump Capacitor.......................................................................... 10 Revision History ............................................................................... 2 Shutdown Mode ......................................................................... 10 Specifications ..................................................................................... 3 Power Dissipation ...................................................................... 10 Absolute Maximum Ratings ............................................................ 4 General Board Layout Guidelines ............................................ 10 ESD Caution.................................................................................. 4 ADP3605 Regulated Adjustable Output Voltage ................... 10 Pin Configuration and Function Descriptions ............................. 5 Regulated Dual Supply System ................................................. 11 Typical Performance Characteristics ............................................. 6 Outline Dimensions ....................................................................... 12 Theory of Operation ........................................................................ 8 Ordering Guide .......................................................................... 12 Applications Information ................................................................ 9 REVISION HISTORY 12/12Rev. A to Rev. B Updated Format .................................................................. Universal Deleted 14-Lead TSSOP .................................................... Universal Changes to Features Section, General Description Section, and Figure 2 .............................................................................................. 1 Changes to Table Summary Text Prior to Table 1 and Table 1 ... 3 Changes to Table 2 ............................................................................ 4 Deleted Other Members of ADP36xx Family Table I Renumbered Sequentially ................................................................ 4 Deleted Figure 4 Renumbered Sequentially................................. 4 Deleted Improved Load Regulation Section ................................. 6 Deleted Maximum Output Voltage Section and Figure 15 ......... 7 Changes to Figure 10 Caption......................................................... 7 Changes to Power Dissipation Section, Regulated Adjustable Output Voltage Section, and Figure 17 ........................................ 10 Updated Outline Dimensions ....................................................... 12 Changes to Ordering Guide .......................................................... 12 7/99Rev. 0 to Rev. A Rev. B Page 2 of 12