DATA SHEET Part No. AN34070A Package Code No. SSMINI-5DA Publication date: October 2008 SDB00163BEB 1 AN34070A Contents Overview ............................................................................................................................. 3 Features ............................................................................................................................. 3 Applications ......................................................................................................................... 3 Package ............................................................................................................................ 3 Type .................................................................................................................................. 3 Application Circuit Example (Block Diagram) Pin Descriptions ............................................................................ 4 .................................................................................................................. 4 Absolute Maximum Ratings ..................................................................................................... 5 Operating Supply Voltage Range ............................................................................................. 5 Electrical Characteristics ....................................................................................................... 6 Electrical Characteristics (Reference values for design) ............................................................... 6 Technical Data ..................................................................................................................... 8 * I/O block circuit diagrams and pin function descriptions * Input and output timing chart * PD Ta diagram ............................................................... 8 .................................................................................................... 9 ................................................................................................................. 10 Usage Notes ........................................................................................................................ 11 SDB00163BEB 2 AN34070A AN34070A Integrated load switch with soft start implemented Overview The AN34070A is a low power load switch with output short to ground protection. Features y Miniature package y Low ON-resistance of 0.45 y Output short to ground protection y Soft start capability controllable by external capacitor Applications y Memory card slot for camera Package y 5 pin plastic small surface mount package (SMINI type) Type y Bi-CMOS IC SDB00163BEB 3 AN34070A Application Circuit Example (Block Diagram) Vin 1 3 Vout Q1 EN 5 Q2 RLOAD = 6 CLOAD = 1 F GND 2 3.3 V SS 4 3.3 V on / off control R1 300 CSS = 0.1 F Pin Descriptions Pin No. Pin name Type Power supply Description 1 Vin Input voltage of 3.3 V typical 2 GND Ground Signal ground 3 Vout Output Signal output 4 SS Input Connect to soft start capacitor 5 EN Input Input voltage of 3.3 V typical SDB00163BEB 4 AN34070A Absolute Maximum Ratings A No. Parameter Symbol Rating Unit Note 1 Supply voltage VCC 3.8 V *1 2 Supply current ICC 500 mA 3 Power dissipation PD 60 mW *2 4 Operating ambient temperature Topr -25 to +75 C *3 5 Storage temperature Tstg -55 to +125 C *3 Note) *1: The range under absolute maximum ratings, power dissipation. *2: Power dissipation shows the value of only package at Ta = 75C. When using this IC, refer to the * PD - Ta diagram in the Technical Data and use under the condition not exceeding the allowable value. *3: Expect for the storage temperature and operating ambient temperature, all ratings are for Ta = 25C. Operating Supply Voltage Range Parameter Supply voltage range Symbol Range Unit Note VCC 2.7 to 3.6 V Note) The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. SDB00163BEB 5 AN34070A Electrical Characteristics at CSS = 0.1 F, RLOAD = 6 , VIN = EN = 3.3 V Note) Ta = 25C2C unless otherwise specified. B No. Parameter Symbol Conditions Limits Min Typ Max Unit Note ON characteristic 1 Quiescent current IQ No load 100 A 2 Load current IL VIN - VOUT = 0.3 V 0.5 A 3 ON resistance RON IL = 500 mA, VOUT VIN - 0.3 V -- 0.45 0.6 4 EN high threshold VENH VOUT 3 V 2 V 5 EN low threshold VENL VOUT 0.2 V 0.5 V 6 Discharge impedance RDIS No load 270 330 390 ISTB EN = 0 V, No load 1 A OFF characteristic 7 Standby current Electrical Characteristics (Reference values for design) at CSS = 0.1 F, RLOAD = 6 , VIN = EN = 3.3 V Note) Ta = 25C2C unless otherwise specified. The characteristics listed below are reference values for design of the IC and are not guaranteed by inspection. If a problem does occur related to these characteristics, Panasonic will respond in good faith to user concerns. B No. Parameter Symbol Conditions Limits Min Typ Max Unit Note Soft start characteristic 8 Soft start tR 1 ms 9 Soft start delay tD 1 ms SDB00163BEB 6 AN34070A Electrical Characteristics (Reference values for design) at CSS = 0.1 F, RLOAD = 6 , VIN = EN = 3.3 V (continued) Note) Ta = 25C2C unless otherwise specified. The characteristics listed below are reference values for design of the IC and are not guaranteed by inspection. If a problem does occur related to these characteristics, Panasonic will respond in good faith to user concerns. Soft start characteristic with soft start capacitor Note) t = Time delay between VCC (= Vin) and EN. (eg. VCC have to be on first before EN) Minimum recommended time for t is 20 ms in order to accommodate 2 F of soft start capacitor. It is possible to reduce t to 1 ms with 0.1 F of soft start capacitor. SDB00163BEB 7 AN34070A Technical Data * I/O block circuit diagrams and pin function descriptions Note) The characteristics listed below are reference values based on the IC design and are not guaranteed. Pin No. Waveform and voltage Internal circuit Vin 1 Vin (Typ. 3.3 V) Vin 2 Control Circuit Vout GND Vin 4 GND 5 EN (Typ. 3.3 V) -- IC ground. Vout to 330 (Discharge impedance) Output of the IC. To be connected to external load. SS to 42 k (when EN is High) To provide soft start characteristic to the output pin. To be connected to external capacitor to ground. Typical value of capacitor is 0.1 F. -- EN is enable signal. To provide control to the output signal. 300 2 1 Control Circuit SS Power supply of the IC. To provide current for the load. 1 3 3 -- 2 GND GND Description 1 GND 2 Impedance 40k 2k 4 2 Vin 1 EN 5 GND 2 SDB00163BEB 8 AN34070A Technical Data (continued) * Input and output timing chart Soft start delay tD Soft start tR SDB00163BEB 9 AN34070A Technical Data (continued) * PD Ta diagram SDB00163BEB 10 AN34070A Usage Notes 1. Pay attention to the PCB (Printed-Circuit-Board) pattern layout in order to prevent damage due to short circuit between pins. In addition, for the pin configuration, refer to the pin functional description diagram. 2. Unless specified in the product specifications, make sure that negative voltage or excessive voltage are not applied to the pins because the device might be damaged. 3. Carry out visual inspection on the PCB (Printed-Circuit-Board) before applying the power, otherwise damage might happen due to problems such as solder-bridge between the pins of the semiconductor device. Also, perform a full technical verification on the assembly quality, because the same damage may happen due to conductive substances, such as solder ball, that adhere to the LSI during transportation. 4. ake notice in the use of this product that it might be damaged or occasionally emit smoke when an abnormal state occurs such as output pin-Vcc short, output-to-output-pin short (load short), pin to pin short or pin to pin leakage current. (And safety measures such as an installation of fuses are recommended because the extent of the above-mentioned damage and smoke emission will depend on the current capability of the power supply.) 5. Carry out thermal design with sufficient margin such that the power dissipation will not be exceeded under the necessary conditions of power supply voltage, load impedance and ambient temperature 6. When carrying out derivative product expansion or when the product is going to be used in a new set, verify the safety including the long-term reliability for each set. 7. Check the risk that is caused by the failure of external components. SDB00163BEB 11 Request for your special attention and precautions in using the technical information and semiconductors described in this book (1) If any of the products or technical information described in this book is to be exported or provided to non-residents, the laws and regulations of the exporting country, especially, those with regard to security export control, must be observed. (2) The technical information described in this book is intended only to show the main characteristics and application circuit examples of the products. No license is granted in and to any intellectual property right or other right owned by Panasonic Corporation or any other company. Therefore, no responsibility is assumed by our company as to the infringement upon any such right owned by any other company which may arise as a result of the use of technical information described in this book. (3) The products described in this book are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: - Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. - Any applications other than the standard applications intended. (4) The products and product specifications described in this book are subject to change without notice for modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the range of absolute maximum rating and the guaranteed operating conditions (operating power supply voltage and operating environment etc.). Especially, please be careful not to exceed the range of absolute maximum rating on the transient state, such as power-on, power-off and mode-switching. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products. Measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products. (6) Comply with the instructions for use in order to prevent breakdown and characteristics change due to external factors (ESD, EOS, thermal stress and mechanical stress) at the time of handling, mounting or at customer's process. When using products for which damp-proof packing is required, satisfy the conditions, such as shelf life and the elapsed time since first opening the packages. (7) This book may be not reprinted or reproduced whether wholly or partially, without the prior written permission of our company. 20080805