mx846 Clare, Inc., mx846 Datasheet

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mx846

Manufacturer Part Number
mx846
Description
50 Ma Switched Capacitor Buck-boost Dc/dc Converter With Regulated Output
Manufacturer
Clare, Inc.
Datasheet
MX846-02
Drawing No. 017709
Features:
• Fully Regulated Output Voltage
• Input Voltage Range from 3 V to 5 V
• 50 mA Output Current
• Output Accuracy: ±5%
• High Switching Frequency: 1MHz
• Low Power Shutdown Mode: 1 µA (Typical)
• Minimum Number of Low Cost External
• 8 lead, RoHS compliant, SOIC package
• Wide Temperature Range: -40°C to +85°C
Applications:
• Local 3V to 5V Conversions
• Battery Powered Devices
• Computer Peripherals and Add-On Cards
• Portable Instruments
• Mobile Phones
(5 V and Adjustable)
Components
IXYS
Functional Block Diagram
Fig. 1
1
DC/DC Converter with Regulated Output
General Description
The MX846 is a 50 mA regulated output switched
capacitor Buck-Boost DC/DC Converter targeting
portable, battery powered devices. The MX846
supplies a high efficiency regulated output voltage
with a minimum number of external components.
The output is adjustable from 3 to 5 volts with an
accuracy of ±5%. The charge pump topology of the
MX846 eliminates the need for an inductor making it
ideal for low noise applications.
With an operating range of 3 to 5 volts, and a typical
shutdown current of 1 µA, the MX846 is an optimum
choice for portable battery powered devices. A
1MHz switching frequency enables the use of small
charge pump and filter capacitors to meet the
demands of size sensitive applications.
Ordering Information
Part No.
MX846B
MX846BTR
50 mA Switched Capacitor Buck-Boost
Typical Application Circuit
Description
SOIC-8 Tube
SOIC-8 Tape and Reel
Fig. 2
www.claremicronix.com
MX846-02
Qty
100
2500
4/28/08

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mx846 Summary of contents

Page 1

... MX846 eliminates the need for an inductor making it ideal for low noise applications. With an operating range volts, and a typical shutdown current of 1 µA, the MX846 is an optimum choice for portable battery powered devices. A 1MHz switching frequency enables the use of small charge pump and filter capacitors to meet the demands of size sensitive applications ...

Page 2

... ESD Warning ESD (electrostatic discharge) sensitive device. Although the MX846 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. ...

Page 3

... ESR. Capacitor C DVCC CPO with 0.1 Ω ESR. Capacitors with higher ESR may reduce output voltage and efficiency. 2 See Figure 2 conditions resistors should be used to maintain output voltage tolerance. MX846-02 Drawing No. 017709 4.7 µF unless otherwise noted PO Symbo Condition l ...

Page 4

... Load Current mA Fig. 5 Output Voltage vs. Load Current 1 0.8 0.6 0.4 0 3.5 Supply Voltage Volts Fig. 7 Supply Current vs. Supply Voltage in Shutdown Mode MX846-02 Drawing No. 017709 (T = 25°C unless otherwise specified Fig. 4 Supply Current vs. Temperature in Normal Mode (No Load) Vin = 5 Vin = 3 130 170 210 4 4 ...

Page 5

... Except as set forth in IXYS’ Standard Terms and Conditions of Sale, IXYS Corporation assumes no liability whatsoever, and disclaims any expressed or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right . MX846-02 Drawing No. 017709 5 IXYS 4/28/08 ...

Page 6

... The products described in this document are not intended for use in medical implantation or other direct life support applications where malfunction may result in direct physical harm, injury or death to a person. Specification: MX846 ©Copyright 2008, IXYS Corporation All rights reserved. Printed in USA. 6 4/28/08 www ...

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