AME, Inc. AME5104 150KHz,3A PWM DC/DC Buck Converter n General Description The AME5104 is a monolithic IC that was designed as a step-down DC/DC Converter and owns the ability of driving a 3A load without additional transistor component.The output versions included 3.3V,5V,12V and an adjustable type.It operates at a switching frequency of 150KHz thus allowing smaller sized filter components otherwise it would need lower frequency switchhing regulators. Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator frequency. Regarding protected function, current limit is to protect over current operating of the output switch. n Features l 3.3V, 5V, 12V and adjustable l Adjustable version output voltage range: 1.4-36V l +4% max over line and load conditions l 150KHz +15% fixed switching frequency l TTL shutdown capability l Operating voltage can be up to 36V l Output load current: 3A l TO-263-5L package l Low power standby mode l Current-limit protection l High efficiency l Built-in a switching transistor on chip, requires only 4 external components l All AME's Lead Free Products Meet Standards RoHS n Applications l Simple High-efficiency step-down regulator l Positive to negative converter l On-card switching regulators Rev.C.02 1 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Function Block Diagram EN V IN + Current Source Bias 1.235V Reference 2.5V Regulator Start Up 200 mV + 220 mV R + COMP - Current Limit FB R2 + R 1=2.5K - COMP + AMP - - COMP 3A Switch Driver + + 150 KHz OSC. COMP - SW Thermal Limit GND n Typical Application 4 + Unregulated DC Input AME 5104 1 Input C1 680uF 3 Unregulated DC Input 2 GND 4 1 Input C1 680uF 2 SW Fix Output R2 1K + FB 5 EN Gnd D1 1N5825 C2 220 uF L O A D C2 220uF L O A D R1 FB AME 5104 Adjustable Output 3 L1 33uH 5 2 SW EN L1 47uH D1 1N5825 Rev.C.02 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Pin Configuration TO-263-5 Top View AME5104ACDV 1. IN 2. SW A M E5104 3. GND(TAB) 4. FB 5. EN 1 2 3 4 5 n Pin Description AME5104AJDVxxx Pin Number Pin Name Pin Description 1 IN 2 SW Power Switch input. This is the drain of the internal NMOS power switch. Minimize the metal trace area connected to this pin to minimize EMI. 3 GND Ground. Tie directly to ground plane. Analog and Power input. Input Supply Pin. Place bypass capacitor as close to VIN as possible. Output voltage feedback input. Set the output voltage by selecting values for R1 and R2 using: 3 FB V R 1 = R 2 out − 1 1 . 23 V Connect the ground of the feedback network to a GND plane. 5 Rev.C.02 EN Enable, active low. The enable pin is an active low control. Tie this pin above 2V to turn off the device. Tie this pin below 0.6V to enable the device. 3 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Ordering Information AME5104 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration A (TO-263) 4 1. IN 2. SW 3. GND 4. FB 5. EN Operating Ambient Package Type Temperature Range Number of Pins C: 0OC to 70OC V: 5 D: TO-263 Output Voltage 330: 500: 12A: ADJ: 3.3V 5V 12V Adjustable Special Feature Z: Lead free Rev.C.02 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Ordering Information Part Number AME5104ACDV330Z AME5104ACDV500Z AME5104ACDV12AZ AME5104ACDVADJZ Marking* AME5104 ACDV330 yyww AME5104 ACDV500 yyww AME5104 ACDV12A yyww AME5104 ACDVADJ yyww Output Voltage Package Operating Ambient Temperature Range 3.3V TO-263-5 0OC to 70O C 5V TO-263-5 0OC to 70O C 12V TO-263-5 0OC to 70O C ADJ TO-263-5 0OC to 70O C Note: ww represents the date code. * A line on top of the first letter represents lead free plating such as A5104 ACDV330 yyww. Please consult AME sales office or authorized Rep./Distributor for the availability of package type. Rev.C.02 5 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Absolute Maximum Ratings Parameter . Symbol Maximum Unit Supply Voltage VIN 40 V EN Pin Input Voltage VEN -0.3~+25 V Feedback Pin Voltage VFB -0.3~+25 V Output Voltage to Ground Vout -1 V Operating Voltage VOP +4.5~+40 V TBD* ESD Classification Caution: Stree above the listed absolute maximum rating may cause permanent damage to the device. *HBM B: 2000~3999V n Recommended Operating Conditions Parameter Symbol Rating Ambient Temperature Range TA 0 to 70 Junction Temperature Range TJ 0 to 125 Storage Temperature Range TSTG -65 to 150 Unit o C n Thermal Information Parameter Package Thermal Resistance* (Junction to Case) TO-263-5 Die Attach Symbol Maximum θJC 3.5 Unit o Thermal Resistance (Junction to Ambient) TO-263-5 Internal Power Dissipation TO-263-5 Conductive Epoxy Solder Iron (10 Sec)** C/W θJA 23 PD Internally Limited 350 W o C * Measure θJC on center of molding compound if IC has no tab. ** MIL-STD-202G-210F 6 Rev.C.02 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Electrical Specifications Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V version, ILOAD =500mA Parameter Symbol Test Condition Min O TJ =25 C VOUT=3.3V 3.168 4.75V≤VIN ≤36V, 0.2A≤ILOAD ≤3A TA=0OC to 70OC Output Voltage VOUT VOUT=5V 7V≤VIN ≤36V, 0.2A≤ILOAD≤3A 15V≤VIN≤36V, 0.2A≤ILOAD≤3A Feedback Trip Point VFB VOUT programmed for 5V 8V≤VIN ≤36V, 0.2A≤ILOAD≤3A 3.135 3.465 TA=0OC to 70OC 4.750 5.250 TJ =25 C 11.52 12.48 TA=0OC to 70OC 11.40 5.200 5.0 V 12.0 12.60 1.290 TA=0OC to 70OC 1.193 1.23 1.310 73 VIN=12V,ILOAD=3A VOUT=5V Efficiency 3.342 4.800 TJ =25OC 80 VIN=12V,ILOAD=3A VOUT=12V % 90 VIN=25V,ILOAD=3A VOUT=5V 77 VIN=12V,ILOAD=3A TJ =25OC IFB Adjustable Version Only, VFB=1.3V Oscillator Frequency FOSC (Note 1) Saturation Voltage VSAT IOUT=2A(Note2,3) Max. Duty Cycle (ON) Dmax (Note 3) 100 Min. Duty Cycle (OFF) Dmin (Note 4) 0 Feedback Bias Current Current Limit ICL O 10 O TA=0 C to 70 C TJ =25OC O 127 O TA=0 C to 70 C 110 TJ =25OC O 150 1.3 O TA=0 C to 70 C 50 100 173 173 1.4 1.5 nA KHz V % Peak Current (Note2,3) TJ =25OC TA=0OC to 70OC Output Leakage Current IL Output=0V (Note 2,4) Quiescent Current IQ (Note 4) Rev.C.02 Units 3.3 VOUT=3.3V η Max TJ =25OC O VOUT=12V Typ 5.5 3.6 4.5 A 6.5 5 50 µA 10 mA 7 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Electrical Specifications Parameter Symbol Test Condition Min Typ O TJ=25 C Shutdown current ISD EN pin=5V VIN=36V O 250 150 O TA=0 C to 70 C EN Input Threshold (High) Max 300 VEH Low (Regulator ON) EN Input Threshold (Low) VEL High (Regulator OFF) EN Input Current(High) IEH VEN =2.5V (Regulator OFF) 5 15 EN Input Current(Low) IEL VEN =0.5V (Regulator ON) 0.02 5 Units µA 0.6 2.0 1.3 V µA Note 1: The switching frequency is reduced when the second stage current limit is activated. Note 2: No diode, inductor or capacitor connected to output pin. Note 3: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 4: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. 8 Rev.C.02 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Characterization Curve Switch Current Limit Switch vs Saturation Voltage 1.4 5.5 VIN=12V VIN =12V VOUT=5V 5.4 Switch Current Limit(A) Saturation Voltage(V) 1.3 V OUT =5V 1.2 1.1 1.0 0.9 0.8 5.3 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4.5 0.7 0 1 2 4.4 -40 3 -25 Switch Current(A) 0 25 75 125 Junction Temperature(℃) IQ vs. Temperature Shutdown Quiescent Current 180 5.2 VIN =12V V FB=12V V OUT=5V 5.1 V EN =5V 160 VOUT=5V 140 Current(uA) IQ(mA) 5.0 4.9 4.8 120 100 4.7 80 60 40 4.6 20 4.5 -40 -25 0 25 75 0 0 125 30 40 Normalized Output Voltage EN Pin Current(Sinking) 50 12 VIN=12V VOUT=5V I LOAD=200mA VI N=36V VOUT =5V VFB=GND 10 1.0 Current(uA) Output Voltage Change(%) 20 Supply Voltage(V) 2.0 1.5 10 Temperature(℃) 0.5 0 -0.5 8 6 4 -1.0 2 -1.5 -2.0 -40 0 -25 0 25 75 125 Junction Temperature(℃) Rev.C.02 155 0 5 10 15 20 25 30 EN Pin Voltage(V) 9 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Characterization Curve VFB vs. Temperature Frequency vs VIN 171 1.28 1.26 167 1.25 VFB (V) VOUT =5V ILOAD=0.5A 163 Frequency(KHz) 1.27 VIN =12V VOUT=5V I LOAD=0. 5A 1.24 1.23 1.22 1.21 159 155 151 147 143 139 135 1.20 131 1.19 -40 -25 0 25 Temperature(℃) 10 75 125 127 10 20 30 40 VIN(V) Rev.C.02 AME, Inc. 150KHz,3A PWM DC/DC Buck Converter AME5104 n Tape and Reel Dimension TO-263-5 P W PIN 1 AME AME Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TO-263-5 24.0±0.1 mm 4.0±0.1 mm 800pcs 330±1 mm n Package Dimension TO-263-5 Top View Side View A K Bottom View A1 E B1 B H PIN 1 P D N G Front View C Rev.C.02 R SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A B C D E G H K 10.050 10.668 0.396 0.420 8.280 9.169 0.326 0.361 4.310 4.670 0.170 0.184 0.660 0.910 0.026 0.036 1.140 1.400 0.045 0.055 N P R A1 B1 1.70REF 0.067 REF 14.600 15.875 0.575 0.625 1.143 1.680 0.045 0.066 0.330 0.580 0.013 0.023 2.280 2.800 0.090 0.110 0o 7.50 8o 7.70 0o 0.295 8o 0.303 5.80 6.45 0.228 0.254 11 www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , April 2008 Document: OR2596-DS5104-C.02 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989