Ordering number : ENA2054A Bi-CMOS LSI LV5725JA Step-down Switching Regulator Overview The LV5725JA is a step-down voltage switching regulator. Functions • Wide input dynamic range: 4.5V to 50V. • Current mode type. • Built-in pulse-by-pulse OCP circuit: detection is on resistance of an external MOS. • Over current protection: HICCUP mode. • Thermal shutdown. • Load-independent soft start circuit • ON/OFF pin • Synchronous operation by external signal. • Power good pin • External voltage is usable when output voltage is high. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage Symbol Conditions VIN max Allowable pin voltage VIN, SW, OUT, PGOOD Ratings Unit 55 V 55 V HDRV, CBOOT 61 V LDRV 6.0 V Between CBOOT to SW 6.0 V Between CBOOT to HDRV EN, ILIM VIN+0.3 V Between VIN to ILIM 1.0 V VDD 6.0 V SS, FB, COMP,RT, SYNC VDD+0.3 V 1.45 W Topr -40 to +85 °C Tstg -55 to +150 °C Allowable Power dissipation Pd max Operating temperature Storage temperature Mounted on a specified board. * Continued on next page. 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. 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 new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage condition (temperature, operation time etc.) 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. 53012 SY 20120523-S00001/50912 SY 20120327-S00002 No.A2054-1/8 LV5725JA Continued from preceding page. Parameter Maximum junction temperature Symbol Conditions Ratings Unit Tj max °C 150 * Specified board : 58.0mm × 78.0mm × 1.6mm, fiberglass epoxy printed board. Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Recommended Operating Range at Ta = 25°C Parameter Supply voltage range Symbol Conditions Ratings Unit VIN 4.5 to 50 Error amplifier input voltage VFB Oscillatory frequency FOSC V 0 to 1.6 V 50 to 500 kHz Electrical Characteristics at Ta = 25°C, VIN = 12V Parameter Symbol Conditions Ratings min typ Unit max Reference voltage block Internal reference voltage Vref Including offset of E/A 0.698 0.708 0.718 V 5V power supply VDD IOUT = 0 to 5mA 4.7 5.2 5.7 V 317 365 412 kHz Triangular waveform oscillator block Oscillation frequency FOSC RT= 56kΩ Frequency variation FOSC DV VIN = 4.5 to 50V Fold back detection voltage VOSC FB After power is supplied to SS, voltage is 1 % 0.5 V detected FB. Fold back oscillation frequency FOSC FB RT= 56kΩ, VFB = 0V 100 130 160 kHz ON/OFF circuit block IC start-up voltage VEN on Hysteresis of startup voltage VEN hys - 2.5 3.0 V 0.3 0.6 - V 4 5 6 Soft start circuit block Soft start source current ISS SC EN > 3.0V Soft start sink current ISS SK EN < 1V, VDD = 5V Soft start end voltage VSS END 0.7 UVLO voltage VUVLO 3.7 Hysteresis of UVLO VUVLO H 2 μA mA 0.9 1.1 4.0 4.3 V UVLO circuit block 0.3 V V Error amplifier Input bias current IEA IN Error amplifier gain GEA Range of common-mode input voltage VEA R VIN = 4.5 to 50V Output sink current IEA OSK FB = 1.0V Output source current IEA OSC FB = 0V Current detection amplifier gain GISNS 1000 1400 0 100 nA 1800 μA/V 1.6 V -100 μA 100 μA 2.4 Over current limiter circuit block Reference current ILIM Over current detection comparator VLIM_OFS +10% μA -5 +5 mV VIN-0.45 VIN V -10% 20 offset voltage Range of over current detection VLIM_CM comparator common mode input PWM comparator Input threshold voltage Maximum ON duty Vt max Duty cycle = DMAX, SW = VIN Vt0 Duty cycle = 0%, SW = VIN DMAX 1.15 1.25 1.35 V 0.5 0.6 0.7 V 92 % Continued on next page. No.A2054-2/8 LV5725JA Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max Power good Power good “L” sink current IPGL PGOOD = 5V 5 Power good “H” sink current IPGH PGOOD = 5V Power good voltage PGthresh When FB voltage rises Hysteresis of power good PGhys mA 1 0.612 μA V 12 mV Output block High side output ON resistance (upper) RONH_HIGH CBOOT – HDRV = -0.1V 12 Ω High side output ON resistance (lower) RONL_HIGH HDRV – SW = +0.1V 3.3 Ω Low side output ON resistance (upper) RONH_LOW VDD – LDRV = -0.1V 7.9 Ω Low side output ON resistance (lower) RONL_LOW LDRV – GND = +0.1V 3.8 Ω High side output ON current (upper) IONH_HIGH CBOOT – HDRV = -4.5V High side output ON current (lower) IONL_HIGH Low side output ON current (upper) IONH_LOW Low side output ON current (lower) 160 mA HDRV – SW = +4.5V 330 mA VDD – LDRV = -5.2V 190 mA IONL_LOW LDRV – GND = +5.2V 250 mA Standby current ICCS EN < 1V Average current consumption ICCA EN > 3.0V Entire device 1 2.5 μA mA Package Dimensions unit : mm (typ) 3178B 5.2 8 0.65 0.15 (1.3) 1.5max 0.22 0.1 (0.33) Allowable power dissipation, Pd max - W 6.4 0.5 1 Pd max -- Ta 2.0 9 4.4 16 Spesified bord:58.0×78.0×1.6mm3 glass epoxy 4-layer board. 1.5 1.45 1.0 0.75 0.5 0 --40 --20 0 20 40 60 8085 100 Ambient temperature, Ta - °C SANYO : SSOP16(225mil) No.A2054-3/8 LV5725JA Block Diagram VIN 13 5V REGULATOR OUT 10 + OCP Comp ILIM 14 + 1.3V + - OCP FB 16 0.7V + + - COMP 1 VIN UVLO VIN + Current Amp 7 CBOOT HICCUP Comp 8 HDRV S Q R SD 1.1V 0.5V SAW WAVE OSCILLATOR fosc forcec 1/3 6 SW CONTROL Logic + PWM Comp 5V 11 VDD 9 LDRV Err Amp 12 GND + 0.612V TSD S Q R 0.9V SD SS/HICCUP 15 REFERENCE VOLTAGE shut down(SD) + FFOLD Amp 0.5V 4 PGOOD 5 EN 2 3 SYNC RT Sample application circuit C1 C7 R7 13 4 PGOOD VIN R5 C6 14 ILIM CBOOT 7 Q1 3 SYNC SYNC HDRV 8 5 EN ON/OFF 1 COMP R2 C8 C3 R6 VOUT Q2 D1 LDRV 9 R4 FB 16 C4 C9 C10 OUT 10 2 RT R1 L SW 6 15 SS/HICCUP C5 C2 GND 12 VDD 11 C11 R3 GND No.A2054-4/8 LV5725JA Pin Assignment COMP 1 16 FB RT 2 15 SS/HICCUP SYNC 3 14 ILIM PGOOD 4 EN 5 LV5725JA 13 VIN 12 GND SW 6 11 VDD CBOOT 7 10 OUT 9 LDRV HDRV 8 Top view Pin Function Pin No. Pin name Description 1 COMP Error amplifier output pin. Make sure to connect a phase compensation network between COMP and GND. 2 RT Oscillating frequency setting pin. Make sure to connect a resistor between this pin and GND. 3 SYNC External synchronous signal input pin. 4 PGOOD Power good pin. 5 EN ON/OFF pin. 6 SW This pin is connected to switching node. Connect the source of Nch MOSFET to this pin. 7 CBOOT Bootstrap capacitor connected pin. This pin is used as gate driving power supply for external Nch MOSFET. Make sure to connect a capacitor between CBOOT and SW. 8 HDRV External upper MOSFET gate driving pin. External lower MOSFET gate driving pin. 9 LDRV 10 OUT Internal regulator power supply pin. This pin is connected to VOUT. 11 VDD Power supply pin for gate drive of the external lower MOS-FET. 12 GND Ground pin. GND pin voltage is the reference for each reference voltage. 13 VIN Power supply pin. This pin is monitored by UVLO function. When the voltage of this pin becomes higher than 4.3V by UVLO 14 ILIM Reference current pin for current detection. The inlet current of approx. 20μA flows into this pin. Connect a resistor externally function, the IC starts up and mode shifts to soft start operation. between this pin and VIN and when the voltage supplied to SW pin is lower than the pin voltage of this resistor, the upper Nch MOSFET is turned off by current limiter comparator. This operation is reset at every PWM pulse. 15 SS/HICCUP Capacitor connection pin for soft start. This pin enables to charge the soft start capacitor by 5μA. (approx) When this pin turns approx. 0.9V, soft start period ends and frequency fold back function is activated. 16 FB Error amplifier reverse input pin. Converter operates to set this pin to 0.708V. The output voltage divided by the external resistance is applied to this pin. After soft start, frequency fold back function operates when the voltage of this pin becomes 0.5V or lower. And oscillating frequency decreases together with FB voltage. No.A2054-5/8 LV5725JA I/O pin equivalent circuit chart Pin No. 1 Pin No. COMP Equivalent Circuit VDD 11 COMP 1 GND 12 2 RT VDD 11 RT 2 GND 12 3 SYNC VDD 11 SYNC 3 GND 12 4 PGOOD VDD 11 PGOOD 4 GND 12 5 EN VDD 11 EN 5 GND 12 6 SW CBOOT 7 VIN 13 SW 6 GND 12 Continued on next page. No.A2054-6/8 LV5725JA Continued from preceding page. Pin No. 7 Pin No. CBOOT Equivalent Circuit VDD 11 CBOOT 7 VIN 13 SW 6 8 LDRV CBOOT 7 HDRV 8 SW 6 GND 12 9 HDRV VDD 11 LDRV 9 GND 12 10 OUT VIN 13 OUT 10 VDD 11 GND 12 11 VDD VIN 13 VDD 11 GND 12 12, 13 GND, VIN VIN 13 1pF GND 12 14 ILIM VIN 13 ILIM 14 GND 12 Continued on next page. No.A2054-7/8 LV5725JA Continued from preceding page. Pin No. 15 Pin No. SS/HICCUP Equivalent Circuit VDD 11 SS/HICCUP 15 GND 12 16 FB VDD 11 FB 16 GND 12 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. Regarding monolithic semiconductors, if you should intend to use this IC continuously under high temperature, high current, high voltage, or drastic temperature change, even if it is used within the range of absolute maximum ratings or operating conditions, there is a possibility of decrease reliability. Please contact us for a confirmation. 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. 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 intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of May, 2012. Specifications and information herein are subject to change without notice. PS No.A2054-8/8