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| DATA SHEET DATA SHEET BIPOLAR ANALOG INTEGRATED CIRCUIT PC2250 SERIES LOW-SATURATED STABILIZED POWER SUPPLY WITH SYSTEM RESET PIN DESCRIPTION The PC2250 series is a collection of low-saturated 4-pin stabilized power supplies with a pin that outputs a reset signal when a drop in the input voltage is detected. Because the reverse leakage current of these power supplies is about 1 A even if a voltage is applied to the output pin when the input voltage is cut off, these power supplies are ideal for systems with on-board microprocessors requiring battery backup. FEATURES * * * * Low minimum voltage difference between input and output VDIF = 0.15 V TYP. (at IO = 40 mA) Outputs reset signal (active-low) when the input voltage or output voltage drops. Low reverse leakage current during back up IOLK = 1 A TYP. Low circuit operating current under no load IBIAS = 1.3 mA TYP. PIN CONFIGURATION (Marking Side) 4-pin plastic SIP (TO-126) PC2251H, 2253H, 2255H 1: INPUT 12 34 2: RESET 3: GND 4: OUTPUT ORDERING INFORMATION Part Number Package 4-pin plastic SIP (TO-126) 4-pin plastic SIP (TO-126) 4-pin plastic SIP (TO-126) Output Voltage 3V 5 V (TYPE1) 5 V (TYPE2) PC2251H PC2253H PC2255H BLOCK DIAGRAM INPUT Overcurrent limiter circuit OUTPUT Starter circuit Reference voltage circuit Error amplifier circuit RESET Reset circuit GND The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. G14451EJ2V0DS00 (2nd edition) Date Published December 1999 N CP(K) Printed in Japan (c) 1999 PC2250 SERIES ABSOLUTE MAXIMUM RATINGS (Unless otherwise specified, TA = 25C) Parameter Input Voltage Total Power Dissipation Operating Ambient Temperature Operating Junction Temperature Storage Temperature Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient) Symbol VIN PT TA TJ Tstg Rth (J-C) Rth (J-A) Rating -0.3 to +12 1.2 Note Unit V W C C C C/W C/W -20 to +85 -20 to +150 -55 to +150 10 104 Note The total loss is limited by an internal circuit. Where TJ > 150C, an internal protection circuit cuts off the output. Caution If any of the parameters exceeds the absolute maximum ratings, even momentarily, the quality of the product may be impaired. The absolute maximum ratings are values that may physically damage the product(s). Be sure to use the product(s) within the ratings. STANDARD CONNECTION INPUT INPUT 1 3 CIN 0.33 F GND 4 2 RESET Reset output D2 CDLY D1 OUTPUT + CO + Backup capacitor (for backup) Output CIN : Determine the capacitance depending on the line between the power supply smoothing circuit and input pin. Be sure to connect this capacitor to prevent abnormal oscillation. Use of a capacitor, such as a film Note that some capacitor, with excellent voltage and temperature characteristics is recommended. laminated ceramic capacitors have poor temperature and voltage characteristics. When using a laminated ceramic capacitor, the capacitance must be stable in the voltage and temperature ranges used. CO : Must be 10 F or more. Be sure to connect this capacitor to prevent oscillation and to improve transient load stability. Connect CIN and CO as close to the IC (within 1 to 2 cm) as possible. D1, D2 : Connect Schottky barrier diodes (with a low forward voltage) if the voltage on the OUTPUT and RESET pins is lower than that on the GND pin. 2 Data Sheet G14451EJ2V0DS00 PC2250 SERIES PC2251 RECOMMENDED OPERATING CONDITIONS Parameter Input Voltage Output Current Operating Junction Temperature Symbol VIN IO TJ MIN. 3.5 0 -20 TYP. 4 MAX. 9 40 +125 Unit V mA C Caution The recommended operating range may be exceeded without causing any problems provided that the absolute maximum ratings are not exceeded. However, if the device is operated in a way that exceeds the recommended operating conditions, the margin between the actual conditions of use and the absolute maximum ratings is small, and therefore thorough evaluation is necessary. The recommended operating conditions do not imply that the device can be used with all values at their maximum values. ELECTRICAL SPECIFICATIONS (Unless otherwise specified, VIN = 4 V, IO = 40 mA, TJ = 25C, CIN = 0.33 F, CO = 10 F.) Parameter Output Voltage Symbol VO1 VO2 3.5 V VIN 9 V, 1 mA lo 40 mA, 0C TJ 125C Line Regulation REGIN 3.5 V VIN 12 V 3.5 V VIN 9 V Load Regulation REGL 1 mA lO 100 mA 1 mA lO 40 mA Quiescent Current IBIAS IO = 0 A IO = 100 mA Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Output Current Temperature Coefficient of Output Voltage OFF Output Leakage Current Reset Start Output Voltage Reset Output Saturated Voltage 8.0 1.0 70 48 0.15 15 150 0.2 10 VO1-0.2 VO1-0.1 0.8 0.30 50 20 50 20 2.0 mV mV mV mV mA mA mA Conditions MIN. 2.88 2.85 TYP. 3.00 MAX. 3.12 3.15 Unit V V IBIAS Vn R*R VDIF IOshort IOpeak 4 V VIN 12 V 10 Hz f 100 kHz f= 120 Hz, 4 V VIN 9 V IO = 40 mA, 0C TJ 125C VIN = 12 V VIN = 4 V IO = 5 mA, 0C TJ 125C VIN = 0 V, VO = 3.0 V 0C TJ 125C IR = 1.6 mA Vr.m.s. dB V mA mA mV/C VO/T IOLK VORT VRT(sat) A V V Data Sheet G14451EJ2V0DS00 3 PC2250 SERIES PC2253 RECOMMENDED OPERATING CONDITIONS Parameter Input Voltage Output Current Operating Junction Temperature Symbol VIN IO TJ MIN. 5.5 0 -20 TYP. 6 MAX. 12 40 +125 Unit V mA C Caution The recommended operating range may be exceeded without causing any problems provided that the absolute maximum ratings are not exceeded. However, if the device is operated in a way that exceeds the recommended operating conditions, the margin between the actual conditions of use and the absolute maximum ratings is small, and therefore thorough evaluation is necessary. The recommended operating conditions do not imply that the device can be used with all values at their maximum values. ELECTRICAL SPECIFICATIONS (Unless otherwise specified, VIN = 6 V, IO = 40 mA, TJ = 25C, CIN = 0.33 F, CO = 10 F.) Parameter Output Voltage Symbol VO1 VO2 5.5 V VIN 12 V, 1 mA lo 40 mA, 0C TJ 125C Line Regulation Load Regulation REGIN REGL 5.5 V VIN 12 V 1 mA lO 100 mA 1 mA lO 40 mA Quiescent Current IBIAS IO = 0 A IO = 100 mA Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Output Current Temperature Coefficient of Output Voltage OFF Output Leakage Current Reset Start Output Voltage Reset Output Saturated Voltage 8.0 1.0 130 46 0.15 15 150 0.3 10 2.70 2.85 3.00 0.8 0.30 30 80 30 2.0 mV mV mV mA mA mA Conditions MIN. 4.8 4.75 TYP. 5.0 MAX. 5.2 5.25 Unit V V IBIAS Vn R*R VDIF IOshort IOpeak 6 V VIN 12 V 10 Hz f 100 kHz f= 120 Hz, 6 V VIN 11 V IO = 40 mA, 0C TJ 125C VIN = 12 V VIN = 6 V IO = 5 mA, 0C TJ 125C VIN = 0 V, VO = 5.0 V 0C TJ 125C IR = 1.6 mA Vr.m.s. dB V mA mA mV/C VO/T IOLK VORT VRT(sat) A V V 4 Data Sheet G14451EJ2V0DS00 PC2250 SERIES PC2255 RECOMMENDED OPERATING CONDITIONS Parameter Input Voltage Output Current Operating Junction Temperature Symbol VIN IO TJ MIN. 5.5 0 -20 TYP. 6 MAX. 12 40 +125 Unit V mA C Caution The recommended operating range may be exceeded without causing any problems provided that the absolute maximum ratings are not exceeded. However, if the device is operated in a way that exceeds the recommended operating conditions, the margin between the actual conditions of use and the absolute maximum ratings is small, and therefore thorough evaluation is necessary. The recommended operating conditions do not imply that the device can be used with all values at their maximum values. ELECTRICAL SPECIFICATIONS (Unless otherwise specified, VIN = 6 V, IO = 40 mA, TJ = 25C, CIN = 0.33 F, CO = 10 F.) Parameter Output Voltage Symbol VO1 VO2 5.5 V VIN 12 V, 1 mA lo 40 mA, 0C TJ 125C Line Regulation Load Regulation REGIN REGL 5.5 V VIN 12 V 1 mA lO 100 mA 1 mA lO 40 mA Quiescent Current IBIAS IO = 0 A IO = 100 mA Quiescent Current Change Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Output Current Temperature Coefficient of Output Voltage OFF Output Leakage Current Reset Start Output Voltage Reset Output Saturated Voltage 8.0 1.0 130 46 0.15 15 150 0.3 10 VO1-0.3 VO1-0.2 0.8 0.30 30 80 30 2.0 mV mV mV mA mA mA Conditions MIN. 4.8 4.75 TYP. 5.0 MAX. 5.2 5.25 Unit V V IBIAS Vn R*R VDIF IOshort IOpeak 6 V VIN 12 V 10 Hz f 100 kHz f = 120 Hz, 6 V VIN 11 V IO = 40 mA, 0C TJ 125C VIN = 12 V VIN = 6 V IO = 5 mA, 0C TJ 125C VIN = 0 V, VO = 5.0 V 0C TJ 125C IR = 1.6 mA Vr.m.s. dB V mA mA mV/C VO/T IOLK VORT VRT(sat) A V V Data Sheet G14451EJ2V0DS00 5 PC2250 SERIES CHARACTERISTIC CURVES (Unless otherwise specified, TA = 25C. Reference values) PT vs. TA Characteristics 15 with infinite heatsink 30 VIN = 6V, IO = 5 mA VO - TJ Characteristics VO - Output Voltage Variation - mV PT - Total Power Dissipation - W 12.5 20 10 10 0 -10 -20 -30 -25 with 10C/W heatsink 5 1.2 0 without heatsink 25 50 75 100 125 150 TA - Operating Ambient Temperature - C 0 25 50 75 100 125 150 TJ - Operating Junction Temperature - C VO - VIN Characteristics 7 IO = 40 mA 25 IBIAS - VIN Characteristics IO = 100 mA IBIAS - Quiescent Current - mA 6 VO - Output Voltage - V 5 4 PC2253, 2255 20 15 PC2253, 2255 PC2251 PC2251 3 2 1 10 5 0 1 2 3 4 5 6 VIN - Input Voltage - V 7 8 0 2 4 6 VIN - Input Voltage - V 8 10 R*R - f Characteristics 90 IO = 40 mA 80 R*R - Ripple Rejection - dB PC2251 70 60 PC2253, 2255 50 40 30 10 100 1k 10k f - Frequency - Hz 100k 6 Data Sheet G14451EJ2V0DS00 PC2250 SERIES RESET OUTPUT CHARACTERISTICS (with standard connection) VIN 1.5 to 2 V 0V VO(RST) VO Note 1 0V VRST ( PC2251, 2255) 0V Note 2 VRST ( PC2253) 0V Note 2 Notes 1. The reset signal is output if the circuit enters backup status when the input voltage falls below the output voltage. 2. The reset output is undefined if the input voltage is 1.5 to 2 V or lower. Data Sheet G14451EJ2V0DS00 7 PC2250 SERIES NOTES ON CORRECT USE Keep the output current of the PC2250 series to within lO (steady-state current) in Figure 1 at the operating junction temperature (TJ). Keep the output current, including the inrush current to the output capacitor, to within IORUSH in the figure when starting the circuit. If these current limits are exceeded, the output voltage may not rise to the specified level because of the operation of the overcurrent limiter circuit. Figure 1. Output Current Limits of PC2250 Series 200 150 Output Inrush Current IORUSH (mA) Output current IO (mA) IORUSH 200 IO (steady-state current) 50 0 50 100 150 Operating Junction Temperature TJ (C) 8 Data Sheet G14451EJ2V0DS00 PC2250 SERIES PACKAGE DRAWINGS 4 PIN PLASTIC SIP (TO-126) A E N M Q D 1 4 K Y H C F J V U G M ITEM A C D E F G H J K M N Q U V Y MILLIMETERS 8.5 MAX. 1.1 MIN. 9.70.3 INCHES 0.335 MAX. 0.043 MIN. 0.3820.012 NOTE Each lead centerline is located within 0.2 mm (0.008 inch) of its true position (T.P.) at maximum material condition. 3.20.1 0.650.1 0.2 2.0 1.25 MAX. 2.3 MIN. 11.5 MAX. 2.70.2 14.5 MAX. 1.7 MAX. 0.550.1 13.50.7 0.1260.004 0.026 +0.004 -0.005 0.008 0.079 0.05 MAX. 0.09 MIN. 0.453 MAX. 0.106 +0.009 -0.008 0.571 MAX. 0.067 MAX. 0.022 +0.004 -0.005 0.531 +0.029 -0.028 P4HP-200B-1 Data Sheet G14451EJ2V0DS00 9 PC2250 SERIES RECOMMENDED SOLDERING CONDITIONS Solder this product under the following recommended conditions. For details of the recommended soldering conditions, refer to information document Semiconductor Device Mounting Technology Manual (C10535E). For soldering methods and conditions other than those recommended, consult NEC. Through Hole Type Soldering Conditions PC2251H, 2253H, 2255H: 4-pin plastic SIP (TO-126) Soldering Method Wave soldering (Pins only) Partial heating Soldering Conditions Solder bath temperature: 260C max., Time: 10 sec max. Pin temperature: 300C max., Time: 3 sec max. (per pin) Caution When soldering this product using wave soldering, exercise care that the solder does not come in direct contact with the package. 10 Data Sheet G14451EJ2V0DS00 PC2250 SERIES [MEMO] Data Sheet G14451EJ2V0DS00 11 PC2250 SERIES * The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. * No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this document. * NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC Corporation or others. * Descriptions of circuits, software, and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. The incorporation of these circuits, software, and information in the design of the customer's equipment shall be done under the full responsibility of the customer. NEC Corporation assumes no responsibility for any losses incurred by the customer or third parties arising from the use of these circuits, software, and information. * While NEC Corporation has been making continuous effort to enhance the reliability of its semiconductor devices, the possibility of defects cannot be eliminated entirely. To minimize risks of damage or injury to persons or property arising from a defect in an NEC semiconductor device, customers must incorporate sufficient safety measures in its design, such as redundancy, fire-containment, and anti-failure features. * NEC devices are classified into the following three quality grades: "Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based on a customer designated "quality assurance program" for a specific application. The recommended applications of a device depend on its quality grade, as indicated below. Customers must check the quality grade of each device before using it in a particular application. Standard: Computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) Specific: Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems or medical equipment for life support, etc. The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books. If customers intend to use NEC devices for applications other than those specified for Standard quality grade, they should contact an NEC sales representative in advance. M7 98. 8 |
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