BM1507

BM1507 BOOKLY | Alldatasheet

Document overview

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Technical content

Features

3 GND

2 Output

1 VIN

(Top View) Pin Assignments BM1507 is available in a 5-lead TO-252 lead-free or green package. version included a fixed 3.3V, 5V, 12V, and an adjustable type. load conditions, and +15% on the oscillator frequency. The output tolerance on output voltage under specified input voltage and output switching regulators. Other features include a guaranteed +4% components than what would be needed with lower frequency switching frequency of 150KHz thus allowing smaller sized filter function occurred and V FB is down to 0.5V below, the switching frequency will be reduced. The BM1507 series operates at a against over current operating of the output switch. If the current limit temperature operating from damaging the device, and current limit is line and load regulation without an external design. Regarding the protected function, the thermal shutdown is to prevent over The internal compensation makes the feedback control have good can be controlled by logic level and then come into standby mode. board space can be saved easily. The external shutdown function transistor. Due to reducing the number of external components, the converter and is capable of driving a 3A load without an external The BM1507 is a monolithic IC designed for a step-down DC/DC

Description

150KHz, 3A PWM BUCK DC/DC CONVERTER BM1507

150KHz, 3A PWM BUCK DC/DC CONVERTER Typical Application Circuit (1) Fixed Type Circuit FB 12V DC Input 3.3V/3A Output Load 33uH OutputBM1507 - 3 31 2 Vin Inductor SD C o Capacitor C in Capacitor D 1 Schottky Diode GND (2) Adjustable Type Circuit R2 R1 FB 12V DC Input 5V/ 3A Output Load 47uH4 Output

1 BM1507 2

R1VOUT = VFB × (1 + ) VFB = 1.23V, R2 = 1K ~ 3K (3) Delay Start Circuit R2 R1 FB 12V DC Input 5V/ 3A Output Load 47uH4 Output 0.1uF SD RDEL AY 10K C o Capacitor C in Capacitor GND D 1 Schottky Diode 2 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Pin Descriptions Pin Number Pin Name VIN Output GND FB SD Output Voltage Feedback Control ON / OFF Shutdown Functional Block Diagram SD VIN 200mV 220mV Current Source B i a s 1.235V Reference 2.5V Regulator Start Up Comp Comp mp A Switch Frequency Compen- s a t i o n FB Comp _ Pre- Driver Output 150kHz OSC. Thermal Shutdown GND 3 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Absolute Maximum Ratings (TA = 25°C) (Note4) Symbol ESD HBM ESD MM VCC VSD VFB VOUT Parameter Human Body Model ESD Protection Machine Model ESD Protection Supply Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Storage Temperature Operating Junction Temperature Rating 200 +36 -0.3 to +18 -0.3 to +18 Internally Limited -65 to +150 -40 to +125 4. Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratin gs only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. Unit KV V V V V V W o o C C PD TST TJ Note: Recommended Operating Conditions (TA = 25°C) Symbol IOUT VOP TA Output Current Operating Voltage Operating Ambient Temperature Parameter Max Min Unit +85 V4.5 o -20 C 4 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Electrical Characteristics (All Output Voltage Versions) Unless otherwise specified, VIN = 12V for 3.3V, 5V, adjustable version and VIN = 18V for the 12V version. ILOAD = 0.5A Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25°C. Symbol Parameter Typ Max -50 -100 175 175 Conditions Min Unit VFB = 1.3V IFB Feedback Bias Current -10 nA ( Adjustable Version Only ) 150 125 FOSC Oscillator Frequency KHz 110 Oscillator Frequency of Short Circuit Protect When current limit Occurred and oVFB < 0.5V, TA = 25 CFSCP 30 50 10 KHz

1.6 IOUT = 3A

VSAT Saturation Voltage 1.4 No Outside Circuit V

1.7 VFB = 0V Force Driver On

Max. Duty Cycle (ON) Min. Duty Cycle (OFF) 100 VFB = 0V Force Driver On DC % VFB = 12V Force Driver Off

5.5 Peak Current

ICL Current Limit 4.5 No Outside Circuit 3.6 A

6.5 VFB = 0V Force Driver On

Output = 0V -200 µA ILEAK VFB =12V Force Driver Off Output = -1V Quiescent Current Standby Quiescent Current VIN = 22V mA IQ 10 150 200 0.6 -0.01 VFB = 12V Force Driver Off mA ON/OFF Pin = 5V ISTBY 70 µA VIN = 22V VIL VIH IH IL θJA -ON/OFF Pin Logic Input Threshold Low (Regulator ON) Voltage ON/OFF Pin Logic Input Current 1.3 V High (Regulator OFF) 2.0 VLOGIC = 2.5V (OFF) µA -0.1 ON/OFF Pin Input Current Thermal Resistance Thermal Resistance with coppe area of approximately TO252-5L r 2cm ×2cm VLOGIC = 0.5V (ON) o TO252-5L Junction to Case C/W θJC Junction to Ambient 50 o C/W 5 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Electrical Characteristics (All Output Voltage Versions) Specifications with boldface type are for full operating temperature range, the other type are for TJ = 25ºC. VMAX Symbol Parameter Typ. VMINConditions Unit 5V < VIN < 22V 1.267 1.193 VFB 1.23 Output Feedback 0.2A < ILOAD < 3A V 1.28 BM1507-ADJ 1.18 VOUT Programmed for 3V η Efficiency 74 VIN = 12V, ILOAD = 3A % 3.432 3.465 5.5V < VIN < 22V 3.168 VOUT Output Voltage 3.3 V BM1507-3.3V 0.2A < ILOAD < 3A 3.135 η Efficiency 75 VIN = 12V, ILOAD = 3A % 5.2 5.25 8V < VIN < 22V 4.8 VOUT Output Voltage 5 V BM1507-5V 0.2A < ILOAD < 3A 4.75 η Efficiency 80 VIN = 12V, ILOAD = 3A % 12.48 12.6 15V < VIN < 22V 11.52 VOUT Output Voltage 12 V BM1507-12V 0.2A < ILOAD < 3A 11.4 η Efficiency 89 VIN = 16V, ILOAD = 3A % 6 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Typical Characteristics 7680 EFF NCY (%) ICIE79 -50 -30 -10 10 30 50 70 90 110 130 150 T E M P E R A T U R E ( ° C ) E f f i c i e n c y v s . T e m p e r a t u r e VIN = 12V VOUT = V 5 IO = 3A EFF ENCY (%) ICI75 VIN = 12V VOUT = 3.3V IO = 3A71 -50 -30 -10 10 30 50 70 90 110 130 150 T E M P E R A T U R E ( ° C ) E f f i c i e n c y v s . T e m p e r a t u r e 1.6 1.6 1.5 VCC = 12V VFB = 0V SATURATIO N VOLTAGE (V) 1.3

1.4 SWI H

LIMIT (A) TC1.4 2A 1.2 1.2 1.1 1A 1.1 0.5A

0.9 VCC = 12 V

VFB = 0V VSD = 0V 0.9 0.8 0.7 - 5 0 0.7 - 5 0 -25 0255075 100 125 TEMPERATURE (°C) Switch Current Limit vs. Temperature 25 0255075 100 TEMPERATURE (°C) Saturation Voltage vs. Temperature - 125 SUPPLY CURRENT (mA) VCC = 1 2V No Load VON = 0V Switch ON SUPPLY CURRENT (µA)50 VCC = 12V No Load VOFF = 5V Switch OFF -50 -30 -10 10 30 50 70 90 110 130 50 1 T E M P E R A T U R E ( ° C ) Supply Current vs. Temperature -50 -30 -10 10 30 50 70 90 110 130 50 T E M P E R A T U R E ( ° C ) Supply Current vs. Temperature 7 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Typical Characteristics (cont.) 1.7 10 1.6 VCC = 12V IO = 100mA 0 -10 THRESHOL D VOLTAGE (V) 1.4

1.5 ON/

(nA)-30 OFF-20 1.3 -40 1.2 -50 1.1 -60 -70 1.0 -80 0.9 VIN = 12V -90 0.8 -50 -30 -10 10 30 50 70 90 110 130 50 1 T E M P E R A T U R E ( ° C ) Threshold Voltage vs. Temperature -100 0 69121518 3 ON/OFF VOLTAGE (V) ON/OFF Current vs. ON/OFF Voltage 170 10 VCC = 12V IO = 500mA VOUT = 5V VCC = 12V VOUT = 5V VFB = 1.3V FEEDBACK CURRENT (nA)-10 0165 FREQUENC Y (KHz) 160 155 -20 150 -30 145 -40 140 -50 -30 -10 10 30 50 70 90 110 130 50 1 T E M P E R A T U R E ( ° C ) Frequency vs. Temperature -50 -50 -30 -10 10 30 50 70 90 110 130 150 T E M P E R A T U R E ( ° C ) Feedback Current vs. Temperature 3.5 3.45 3.4 VOLTAGE OUTPUT (V) 3.35 3.3 3.25 3.2 3.15 3.1 3.05 3.0 2.95 2.9 -40 -2 VIN = 1 2V IO = 3A 20 40 60 80 100 120 140 160 0 TEMPERATURE (°C) Output Voltage vs. Temperature 8 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER

Application Information

+VIN This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transie s and to supply the switching currents nt needed by the regulator. than approximately 6in , only small improvements in heat dissipation are realized. If further thermal improvements are needed, double sided, multi-layer PC board with large copper areas and/or airflow will be recommended. Ground Circuit ground. The BM1507 (TO-252 package) junction temperature rises above ambient temperature with a 3A load for various input an d output voltages. This data was taken with the circuit operating as a buck-switching regulator with all components mounted n a o PC board to simulate the junction temperature under actual operating conditions. This curve can be used for a quick check for the approximate junction temperature for various conditions, but there are many factors that can affect the junction temperature. When load currents higher than 3A are used, double sided or multi-layer PC boards with large copper are s a and/or airflow might be needed, especi ly for high ambient al temperatures and high output voltages. Output Internal switch. The voltage at this pin switches between (+VIN – VSAT) and approximately – 0.5V, with a duty cycle o f approximately VOUT / VIN. To minimize coupling to sensitive circuitry, the PC board copper area connected to this pin should be kept at a minimum. Feedback (FB) For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper should be used in the board layout. (One exception to this is the output (switch) pin, which should not have large areas of copper.) Large areas of copper provide the best transfer of heat (lower thermal resistance) to the surrounding air, and moving air lowers the thermal resistance even further. Sens s the regulated output voltage to complete the feedbacke loop. ON/OFF (SD) Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of 18V) shuts the regulator dow . n If this shutdown feature not needed, the ON/OFF pin can be is wired to the ground pin. Package thermal resistance and junction temperature rise numbers are all approximate, and there are many factors that will affect these numbers. Some of these factors include b ard o size, shape, thickness, position, location, and even board temperature. Other factors are trace width, total printed circu it copper area, copper thickness, single or double-sided, ulti- m layer board and the amount of solder on the board. The effectiveness of the PC board to dissipate heat also depen s on d the size, quantity and spacing of other components on the board, as well as whether the surrounding air is still or mov g. in Furthermore, some of these components such as the catch diode will add heat to the PC board and the heat can vary as the input voltage changes. For the inductor, depending on the physical size, type of core material and the DC resistance, it could either act as a heat sink taking heat away from the board, or it could add heat to the board. Thermal Considerations The TO-252 surface mount package tab is designed to be soldered to the copper on a printed circuit board. The copper and the board are the heat sink for this package and the o her t heat producing components, such as the catch diode an d inductor. The PC board copper area that the package is 2soldered to should be at least 0.8 in , and ideally should have 2 or more square inches of 2 oz. additional copper area which improves the thermal characteristics. With copper areas greater 9 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER

Ordering Information

Packing Output Version Package Lead Free -U : Tube -13 : Tape & Reel Blank : Adjustable 33 : 3.3V 50 : 5.0V 12 : 12V L : Lead Free Blank : Green D5 : TO252-5L 13” Tape and Reel Tube/Bulk Packaging (Note 5)Device Package Code Part Number Quantity Quantity Part Number Suffix Suffix Pb Lead-Free BM1507-XXD5L-XX BM1507-XXD5-XX Note: 2500/Tape & Reel 2500/Tape & Reel TO252-5L 80 -U -13 TO252-5L Not available -13 5. Pad layout as shown on Bookly Inc. suggested pad layout document AP02001, which can be found on our website at http://www.bookly.com/datasheets/ap02001.pdf Marking Information (1) TO252-5L ( Top view ) Logo Output Type : Blank : Adjustable 1507-33 : 3.3V 1507-50 : 5.0V 1507-12 : 12V Internal code L : Lead Free Blank : Green Xth Week : 01~52 Year : "07" = 2007 "08" = 2008 1507 - XX YY WW X X 10 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER Package Outline Dimensions (All Dimensions in mm) Dim Min Max Typ A 2.19 2.39 2.29 A1 0.00 0.13 0.08 A2 0.97 1.17 1.07 b0.51 0.71 0.583 E A 0.61 5.21 0.45 6.00 0.79 0.70 5.46 5.33 0.58 0.53 1 6.20 6.10 DA2 E1 D H 5.21 6.45 4.32 −− 9.40 10.41 9.9 1 1.40 1.78 1.59 0.88 1.27 1.08 1.27 6.58 6.70 e A1 E L H L L3e 5X b2 5X b a a 0° 10° − All Dimensions in mm Suggested Pad Layout Value (in mm) 5.6 0 . 6 1 1 . 0 X Dimen onssi X X 1 Y 5.6 2.0 7.2 1.27 Y 11 of 12 www.bookly.com

150KHz, 3A PWM BUCK DC/DC CONVERTER IMPORTANT NOTICE BOOKLY INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Bookly Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Bookly Incorporated does not assume any liabili ty arising out of the application or use of this document or any product described herein; neither does Bookly Incorporated convey an y license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Bookly Incorporated and all the companies whose products are represented on Bookly Incorporated website, harmless against all damages. Bookly Incorpo ated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized r sales channel. Should Customers purchase or use Bookly Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Bookly Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. roduct names P and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Bookly Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Bookly Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devi es or c systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Bookly Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Bookly Incorporated. Further, Customers must fully indemnify Bookly Incorporated and its representatives against any damages arising out of the use of Bookly Incorporated products in such safety-critical, life support devices or systems. Copyright © 2012, Bookly Incorporated www.bookly.com 12 of 12 www.bookly.com