Ordering number : EN7161 L78MS05J L78MS05JSMP Monolithic Linear IC 5V Constant-Voltage Power Supply with Strobe Line Overview The L78MS05J and L78MS05JSMP are general-purpose constant voltage power supplies that feature an output current of 500mA and a built-in on/off function. The current drain in the output off state is low, making these devices effective for reducing power consumption in application equipment. The surface mounting package can contribute to miniaturization and improved efficiency. These devices are optimal for use in all types of AV and OA equipment and in automotive applications (such as power supplies for meters) as well. Functions • Strobe pin that controls the on/off state of the output voltage (active low input). • 500mA output current. Features • TO-220-5H package for easier mounting and thermal design (L78MS05J). • SMP5 package for easier mounting and thermal design (L78MS05JSMP). • Low output off state current drain makes these devices optimal for saving power in applications. • Full complement of built-in protection circuits (current limiter and thermal protection circuit). Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum input voltage VIN max 35 V Maximum strobe pin voltage VST max VIN max V Continued on next page. Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor products described or contained herein. 92706 / 10606 MS OT B8-5886 No.7161-1/7 L78MS05J/L78S05JSMP Continued from preceding page. Parameter Allowable power dissipation Symbol Conditions Pd max L78MS05J - independent IC L78MS05J SMP *: When mounted on the stipulated circuit board 1 *: When mounted on the stipulated circuit board 2 Ratings Unit 1.75 W 3.9 W 2.0 W Operating temperature Topr -40 to +85 °C Operating temperature Tstg -58 to +150 °C *: Stipulated circuit board 1: 76.1×114.3×1.6mm³ Cooper foil ratio: 60% FR4 Heat sink fin mounting area pattern: 23% [2000mm²] *: Stipulated circuit board 2: 140×300×1.6mm³ Cooper foil ratio: 60% FR4 Allowable Operating Conditions at Ta = 25°C Parameter Symbol Input voltage Conditions Ratings VIN Unit 7.5 to 20.0 V Output current LOUT 0 to 500 mA Output on control voltage VSTL -0.3 to 0.8 V Output off control voltage VSTH 2.0 to VIN mA Electrical Characteristics at Ta = 25°C, VIN = 10V, IOUT = 350mA Parameter Symbol Ratings Conditions min Unit typ max [Output On State, VST = low] Output voltage 1 VOUT1 Line regulation 1 ∆VOLN1 5.0 5.2 V 7V ≤ VIN ≤ 25V, IOUT = 200mA Line regulation 2 Load regulation 1 3 50 mV ∆VOLN2 8V ≤ VIN ≤ 20V, IOUT = 200mA 1 25 mV ∆VOLD1 5mA ≤ IOUT ≤ 500mA 100 mV Load regulation 2 ∆VOLD2 5mA ≤ IOUT ≤ 200mA 50 mV Output voltage 2 VOUT2 7V ≤ VIN ≤ 20V, 5mA ≤ IOUT ≤ 350mA Current drain 4.8 4.75 IQ 1.9 Output noise voltage VNO 10Hz ≤ f ≤ 100kHz Ripple rejection Rrej1 f = 120Hz, 8V ≤ VIN ≤ 19V, IOUT = 100mA 60 Rrej2 f = 120H, 8V ≤ VIN ≤ 19V, IOUT = 300mA 60 Minimum input to Vdrop IOUT = 350mA 5.25 V 5.0 mA 90 µVrms 63 dB 54 dB 2.0 V output voltage drop Output on control VSTL 0.8 V voltage Short circuit current IOSC Peak output current IOP VIN = 35V, for GND 300 mA 700 mA [Output Off State, VST = high] Low-level output VOOFF VST = 5V 20 200 mV Quiescent current IQOFF VST = 5V, except for ISTB 35 40 µA Output off control VSTH VIN V voltage 2.0 voltage [Thermal Protection] Operating TTSD Design target value* 150 180 °C temperature * This rating is a design target value and is not measured. No.7161-2/7 L78MS05J/L78S05JSMP Package Dimensions unit : mm 3079A [L78MS05J] 3275 [L78MS05J] [L78MS05JSMP] [L78MS05JSMP] Pin Arrangement [L78MS05J] [L78MS05JSMP] L78MS05J L78MS05J 1:VIN 2:NC 3:GND 1:VIN 2:NC 3:GND 1 5 Top view 4:STB 5:VOUT 1 5 4:STB 5:VOUT Top view Note: NC pins must not be used (Pin number 2 in the pin arrangement) No.7161-3/7 L78MS05J/L78S05JSMP Block Diagram Stipulated Test Circuits Application Notes Notes: 1. CIN and COUT must be located as close as possible to the IC to stabilize IC operation. 2. COUT must be 0.1µF or larger, and a capacitor (such as a tantalum capacitor) with a low temperature coefficient must be used to prevent oscillation at low temperatures. 3. If the STB pin is open, the internal bias will result in the output going to the on state. If the STB function is not used, the STB pin must be connected to ground to complete the STB operation. 4. Note that a large current will flow if the IC is connected in reverse, that is, if VIN is connected to - and GND is connected to +. No.7161-4/7 L78MS05J/L78S05JSMP Function Table VOUT VSTB VOUT Low High High Low 0 t VSTB 0 t ON/OFF Control Input Block Equivalent Circuit Diagram No.7161-5/7 L78MS05J/L78S05JSMP No.7161-6/7 L78MS05J/L78S05JSMP Specifications of any and all SANYO Semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Semiconductor Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO Semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 2006. Specifications and information herein are subject to change without notice. PS No.7161-7/7