Ordering number : ENA1660A LV57331TT Monolithic Linear IC 1ch Step-up Switching Regulator (Variable Type) Overview The LV57331TT is a one-channel step-up switching regulator. Features • Switch current limit : 1.0A • Internal switch ON resistance : 0.16Ω • The frequency can be switched. • Overheat protection • UVP • Shutdown circuit incorporated • Soft start circuit incorporated Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Power-supply voltage VIN max 6.5 V SW pin voltage *1 SW 18 V Input pin VIN FB, VC, SHDNB, FSLCT, SS 6.5 V Allowable power dissipation Pd max Mounted on a specified board *2 The maximum junction temperature Tjmax Operating temperature Topr -40 to +85 °C Storage temperature Tstg -55 to +150 °C 0.7 W 125 °C *1: Please the coil is not connected and do not exceed the terminal SW even the overshoot inclusion when the switching is done and momentarily. *2: Specified board: 60.0mm × 60.0mm × 1.6mm, glass epoxy board of 2-layer. Recommended Operating Conditions at Ta = 25°C, GND=0V Parameter Symbol Power-supply voltage VIN Maximum output voltage VOUT max Conditions Ratings Unit 2.6 to 5.5 V 15 V Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 60111 SY/30310 SY 20100203-S00004 No.A1660-1/4 LV57331TT Electrical Characteristics at Ta = 25°C, VIN = 2.6V, IL = 0A Parameter Symbol Power supply current consumption IQ Ratings Conditions min typ FB = 1.6V(Not switching) Unit max 1.4 2.0 mA 5 10 µA 1.215 1.245 1.275 V 1.0 1.8 3.0 A 0.05 0.2 %/V 0 +100 nA 5.5 V SHDNB = 0V Feedback voltage VFB Switch current limit ICL VIN = 2.8V Line regulation %VOUT/∆VIN 2.6V ≤ VIN ≤ 5.5V, IOUT = 0mA Current of terminal FB bias IB Input voltage range VIN Error amplifier transconductance gm 300 µS Error amplifier voltage gain AV 300 V/V MAX on duty Dmax Switching frequency fS -100 2.6 80 85 FSLCT = 0V or open 448 560 672 kHz FSLCT = VIN 0.96 1.2 1.44 MHz 0.01 0.1 µA SHDNB = VIN 98 % SHDNB pin current ISHDNB SHDNB = 0V -0.4 -1 µA SW pin leak current IL VSW = 18V 0.01 3 µA SW pin ON resistance RDSON VIN = 2.8V, ISW = 1A 0.16 0.4 Ω SHDNB [L] input threshold VIL SHDNB [H] input threshold VIH Input voltage on threshold UVP 0.3 Input voltage off threshold Soft start pin charge current ISOFT SS = 0V 0.6 V 0.6 0.9 V 1.8 1.94 2.0 V 1.7 1.86 1.9 V 6 15 24 µA Package Dimensions unit : mm (typ) 3245B Pd max -- Ta 1.0 Specified board: 60.0×60.0×1.6mm3 glass epoxy board. 0.5 3.0 4.9 8 0.65 0.125 1.1MAX 0.25 (0.85) (0.53) 2 0.8 0.7 With specified board 0.6 0.4 0.28 0.2 0 --40 --20 0 20 40 60 80 100 120 Ambient temperature, Ta - C 0.08 1 Allowable power dissipation, Pd max - W 3.0 SANYO : MSOP8(150mil) No.A1660-2/4 LV57331TT Package Dimensions VC 1 8 SS FB 2 7 FSLCT SHDNB 3 6 VIN GND 4 5 SW (TOP VIEW) Pin function explanation Symbol function VC Error amplifier output pin FB Error amplifier reversing input pin SHDNB Shutdown input pin (shutdown when [L] is input) GND GND pin SW Nch power FET open drain output VIN Power input pin FSLCT Switching frequency switch pin (VIN = 1.2MHz, GND or open =560kHz) SS Soft start control pin. Connect capacity on the outside. The constant current of 15μA flows from the pin. Open when unused. Block Diagram FSLCT Slope Compensation 0.4uA Oscillator 85% Duty Cycle Limit Load Current Measurement SW Clock PWM COMP FB BG ERROR AMP Reset OVP OVP COMP Bandgap Voltage Reference Thermal BG Set LOGIC Drive Driver BG UVP SD Internal Supply Thermal Shutdown 15uA 0.4uA Soft Start VC VIN GND SHDNB SS Application Circuit Example VIN=2.6 to 5.5V D1 L1 5 6 3 C1 8 SW VIN SHDNB LV57331TT FB SS VC 7 2 R1 4 VOUT R2 GND 1 C3 FSLCT R3 C2 C4 No.A1660-3/4 LV57331TT SANYO Semiconductor Co.,Ltd. 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 Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent 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 Co.,Ltd. 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of Jun, 2011. Specifications and information herein are subject to change without notice. PS No.A1660-4/4