AIC2510-50GM5TR

AIC2510 3A STEP-DOWN PWM CONVERTER

FEATURES GENERAL DESCRIPTION  Operating Input Voltage From 4.5V to 30V The AIC2510 series are step-down monolithic  3.3V, 5V, 12V and Adjustable Output Version PWM converters for delivering 3A at fixed Adjustable Version Output Voltage Range, 1.2V to 30V ± 4% max Over Line and Load Regulation voltages of 3.3V, 5.0V, 12V and using an   external divider to adjust output voltage from 1.2V to 30V with excellent line and load Available in TO-263-5, TO-220-5 and TO-220B Package regulation.  Requires Only 4 External Components Switching frequency up to 150KHz is achievable  150KHz Fixed Constant Frequency thus allowing smaller-sized filter components.  Low Power Standby Mode, IQ Typically 80µA Internal current limit and thermal shutdown  TTL Shutdown Capability   Current Limit Protection and circuits provide protection from overloads. The Thermal internal Shutdown precise reference combined with voltage feedback loop provides optimum output voltage 3A Guaranteed Output Load Current accuracy and fast load transient response.
APPLICATIONS  Fixed Voltage power supply for LCD Monitor and LCD TV On-Card Switching regulators  Simple High Efficiency Step-down regulator 
TYPICAL APPLICATION CIRCUIT AIC2510 VIN 1 OUT IN VOUT 2 L1 + C1 5 ON/OFF D1 4 + C2 CF R1 FB GND 3 C1: electrolyte capacitor 470uF C2: electrolyte capacitor 220uF CF:refer to table1 D1: SK54 L1:33uH Analog Integrations Corporation R2 R1 short, R2 and CF open for fixed version 3A1, No.1 Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw DS-2510G-01 092408 1 AIC2510
ORDERING INFORMATION AIC2510- XXXXXXX PACKING TYPE TR: TAPE & REEL TB: TUBE PACKAGE TYPE M5 : TO-263-5 T5 : TO-220-5 B5 : TO-220B P: Lead Free Commercial G: Green Package OUTPUT VOLTAGE DEFAULT : Adj 33 : 3.3V 50 : 5.0V 12 : 12.0V ORDER NUMBER AIC 2510PM5 AIC 2510-33PM5 AIC 2510-50PM5 AIC 2510-12PM5 AIC 2510PT5 AIC 2510-33PT5 AIC 2510-50PT5 AIC 2510-12PT5 AIC 2510PB5 AIC 2510-33PB5 AIC 2510-50PB5 AIC 2510-12PB5 PIN CONFIGURATION TO-263-5 FRONT VIEW 1: IN 2. OUT 3. GND 4. FB 5. ON/OFF TO-220-5 FRONT VIEW 1: IN 2. OUT 3. GND 4. FB 5. ON/OFF TO-220B FRONT VIEW 1: IN 2. OUT 3. GND 4. FB 5. ON/OFF 12 3 4 5 1 2 3 4 5 1 2 3 4 5 Example: AIC2510-50PM5TR  5.0V Output Version, in Lead Free TO-263- 5 Package & Taping & Reel Packing Type AIC2510-33PB5TR  3.3V Output Version, in Lead Free TO-220B Package & Taping & Reel Packing Type
ABSOLUTE MAXIMUM RATINGS Supply Voltage 30V FB, ON/OFF Pin Input Voltage -0.3V to 30V Operating Temperature Range -40°C ~ 85°C Storage Temperature Range -65°C ~ 150°C Junction Temperature 125°C Lead Temperature (Soldering 10sec.) 260°C 3°C/W Thermal Resistance Junction to Case TO-263-5, TO-220-5, TO-220B Thermal Resistance Junction to Ambient TO-263-5 60°C/W (Assume no ambient airflow, no heatsink) TO-220-5, TO-220B 50°C/W Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. 2 AIC2510
ELECTRICAL CHARACTERISTICS (TA=25°°C, VIN=12V for the 3.3V, 5V and Adjustable version and VIN=24V for the 12V version.) (Note1) PARAMETER TEST CONDITIONS MAX. UNIT 4.5 30 V AIC2510-33 (VIN > 4.75V) 3.168 3.432 V AIC2510-50 (VIN > 7.0V) 4.800 5.200 V AIC2510-12 (VIN > 15V) 11.52 12.48 V 1.193 1.267 V 1.4 V 4 % Input Voltage Fixed Output Voltage FB Reference Voltage MIN. Saturation Voltage TYP. 1.2 Output Voltage Regulation Quiescent Current Internal switch off 5 10 mA Shutdown Quiescent Current ON/OFF= 5V (OFF) 80 200 µA FB bias current VFB=1.3 10 50 nA Output leakage current Vout=-0.9 2 30 mA Logic Input High (Regulator OFF) Logic Input Low (Regulator ON) 2.0 Oscillator Frequency 130 Output Current Limit 3.6 Maximum Duty Cycle 100 Minimum Duty Cycle Efficiency Vo=5V, Io=3A V 150 0.6 V 180 KHz 5.5 A % 0 % 80 % Note 1: Specifications are production tested at TA=25°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 3 AIC2510
TYPICAL PERFORMANCE CHARACTERISTICS 85 90 80 85 VOUT=3.3V version 75 75 65 70 Efficiency (%) Efficiency (%) 60 55 50 45 40 35 30 25 VOUT=5.0V version 80 70 Vin=5V Vin=12V 65 60 55 50 45 40 Vin=18V Vin=24V 20 Vin=12V Vin=18V 35 Vin=24V 30 Vin=30V 25 10 100 1000 10 100 Load current (mA) 1000 Load current (mA) Fig.1 3.3V version efficiency Fig.2 5V version efficiency 90 95 85 90 VOUT=12.0V version 80 Vout=12V 75 o Case Tempearature ( C) 85 Efficiency (%) 80 75 70 65 Vin=18V 60 Vin=24V 55 Vin=30V 70 Vout=5.0V 65 60 Vout=3.3V 55 50 45 40 35 50 IOUT=3A TO-263-5 30 25 45 10 100 5 1000 10 15 190 6.4 180 6.0 170 5.6 160 150 140 130 4.8 4.4 4.0 3.6 110 3.2 -20 0 20 o 40 30 5.2 120 -40 25 Fig.4 Case temperature vs. input voltage 6.8 Current Limit (A) Switching Frequency (kHz) Fig.3 12V version efficiency 200 100 -60 20 Input Voltage (V) Load current (mA) 60 80 TJ( C) Fig.5 Switching frequency vs. Temperature 100 2.8 -60 -40 -20 0 20 40 60 80 100 Current Limit vs. Temperature Fig.6 Current Limit vs. Temperature 4 AIC2510 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 1.6 1.6 1.5 1.5 1.4 1.4 Saturation Voltage (volt) Dropout Voltage (vlot)
1.3 1.2 3A 1.1 1.0 0.9 1A 0.8 0.7 1.3 o -40 C 1.2 o 25 C 1.1 o 100 C 1.0 0.9 0.8 0.7 0.6 0.6 0.5 -60 -40 -20 0 20 40 60 80 100 120 140 0.0 0.5 1.0 1.5 o 2.0 2.5 3.0 3.5 4.0 4.5 Switch Current (A) TJ ( C) Fig.7 Dropout voltage vs. Temperature Fig.8 Switching saturation voltage vs. switch current 5.0 2.5 2.0 Minimum Supply Voltage (volt) ON/OFF threshold voltage (volt) 4.8 OFF 1.5 1.0 ON 0.5 4.6 VFB=1.23V 4.4 ILOAD=120mA 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 0.0 -60 -40 -20 0 20 40 60 80 100 120 140 -60 -40 -20 0 20 40 60 80 100 120 140 o o TJ ( C) TJ ( C) Fig.9 ON/OFF threshold voltage vs. Temperature Fig.10 Minimum Operating supply voltage vs. Temperature (ADJ only) 5.0 VIN = 30V o o -40 C < TJ < 125 C 4.5 4.0 3A IOUT Current (uA) 3.5 0.1A 3.0 2.5 2.0 1.5 VOUT 1.0 100mV/div VIN=12V VOUT=5V 0.5 0.0 0 5 10 15 20 25 ON/OFF Pin Voltage (Volt) Fig.11 ON / OFF Pin Current (sinking) vs. Temperature Fig.12 Load transient response 5 AIC2510
TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Fig.13 FB pin ripple(CCM)
Fig.14 FB pin ripple(DCM) BLOCK DIAGRAM SHDN IN 1.23 V Reference 2.6V Regulator ON / OFF FB Current Limit COMP. AMP. COMP. Compensation Latch Driver Circuit OUT 150KHz Thermal OSC Shutdown GND 6 AIC2510
PIN DESCRIPTIONS PIN 1: IN PIN 2: OUT PIN 3: GND
Supply voltage input for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. Internal switch. The voltage at this pin switches between (VIN-VSAT) and approximately -0.5V, with a duty cycle of approximately VOUT/VIN. Ground requires a short, low noise connection to ensure good load regulation. PIN 4: FB Feedback input for fixed-output or adjustable-output version. Connect directly to output for fixed operation version or to a resistor divider for adjustable operation versions. PIN 5: ON / OFF Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 80µA. Drive it high to disable the reference, control circuitry and internal switches. Drive low or connect to GND for normal operation. APPLICATION INFORMATION Thermal considerations The AIC2510 is available with TO-220-5, TO220B and TO-263-5 packages. The TO-220-5 and TO220B packages need a heat sink in most conditions. The TO-263-5 package is designed to be soldered to the copper on a printed circuit board. The printed circuit board is the heat sink for TO-263-5 package and other heat components, such as inductors and diodes. The size of the heat sink depends on the power loss of AIC2510 and such as sink size, heat produced from heat components, and etc., may be different from those in Fig.8 depending on the conditions of the application. According to the equation 1, as the power loss or ambient temperature is rising the heat sink size must be increased to decrease the thermal resistance ( Rθ jA ) so that the junction temperature does not over 125۫ C. An appropriate increase of heat sink size may result in a normalranged junction temperature. the ambient temperature. The power loss of AIC2510 is determined by input voltage, output voltage and load current. The Fig.4 represents the PD = T j − TA Rθ jA curve of the AIC2510 case temperature in different conditions. As junction temperature rises to its temperature protect point, the AIC2510 will stop working. The curve shows the AIC2510 temperature rises Output voltage drops to zero until the junction above ambient temperature for a 3A load with temperature decreases to a normal range. different input and output voltage. The values of the temperature rise, which are affected by factors 7 AIC2510
APPLICATION INFORMATION (Continued) Components Selection Example Assume the input voltage is 12V, output voltage is Inductor The inductor selection depends on the operating 5V and maximum load current is 3A. The output ripple must be smaller than 2% of output voltage frequency of the AIC2510. The ripple current ∆IL interrelates with inductor value. A lower inductor value gets a higher ripple current. Besides, a higher VIN or VOUT can also get the same result. Inductor selection: L= The inductor value can be calculated as the = following formula. L= 1 (f )(∆IL )  V VOUT 1 − OUT VIN      V 1 VOUT 1 − OUT ( f )(∆I L ) VIN     1 5  × 5 × 1 −  = 32.4uH 150k × 0.6  12  Here, the delta IL is 0.6A. So we choose 33uH inductor. Users can define the acceptable ∆IL to gain a suitable inductor value. Output capacitor selection: Diode The diode current rating must be higher than 1.3  1 ∆VOUT = ∆I L  ESR + 8 fC OUT  times maximum load current. Also, if the power supply needs to resist a continuous output short, the diode should have a current ration equal to the maximum current limit of the AIC2510. The reverse voltage rating of the diode should be   < 100mV  We choice the capacitor value: ESR=0.12, capacitance=220uF  1   = 74mV < 100mV ⇒ ∆VOUT = ∆I L  ESR + 8 fC OUT   higher than 1.25 times input voltage and the diode must be fast. The reverse recovery time of the Diode selection: diode is short. The full load is 3A and delta IL is 0.6A, so the diode current rating must be higher than 3.6A. Capacitor The selection of output capacitor depends on the CF Capacitor for adj version suitable ripple voltage. Lower ripple voltage As using the AIC2510 adj version, the CF corresponds to lower ESR (Equivalent Series capacitor is required to provide additional stability. Resistor) of output capacitor. Typically, once the In different condition, the CF capacitor must be ESR is satisfied with the ripple voltage, the value changed to make the circuit stable. of capacitor is adequate for filtering. The formula of ripple voltage is as below:  1 ∆VOUT = ∆IL  ESR + 8 fC OUT  Output Input Voltage (V) Voltage (V)     The typical input capacitor is 470uF. But as the temperature decreases, the input capacitor needs to increase to stabilize the circuit. R1 ( Ω) CF ( Ω) R2 (pF) 1.8 7 36k 82k 1000 4 12 180k 82k 360 6 12 180k 47k 360 8 15 180k 33k 360 10 18 150k 22k 470 15 25 110k 10k 560 Table 1 8 AIC2510
PHYSICAL DIMENSIONS (unit: mm)  TO-263-5 A c2 E S Y M B O L 1L D H A TO-263-5L MILLIMETERS MIN. MAX. A 4.06 4.83 A1 0.00 0.25 b 0.51 0.99 c 0.38 0.74 c2 1.14 1.65 D 8.38 9.65 E 9.65 e A e SEE VIEW B b WITH PLATING BASE METAL SECTION A-A c 10.67 1.70 BSC H 14.61 15.88 L 1.78 2.79 L1 -- q 1.68 0.25 BSC L3 0° 8° θ GAUGE PLANE L 3 L VIEW B SEATING PLANE 1 A Note: 1. Refer to JEDEC TO-263BA. 2. Dimension "E" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 6 mil per side . 3. Dimension "D" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 9 AIC2510
PHYSICAL DIMENSIONS(Continued) (unit: mm)  TO-220B A E E1 d E1 S Y M B O L F φ D TO-220B MILLIMETERS MIN. MAX. A 4.318 4.826 A1 4.250 4.550 A2 8.250 8.550 b 0.690 0.940 C 0.304 0.530 D 1 D D1 1L e b e1 A1 9.300 2.743(REF) d E L 3.556(REF) 8.480 9.906 10.44 E1 4.953 5.220 φ 3.708 3.962 e 1.524 2.032 e1 6.604 7.112 F 1.143 1.397 L 9.880 10.64 L1 9.090 9.850 C A2 Note : Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 10 AIC2510  TO-220-5L E E1 d A E1 S Y M B O L F φ D 1 D TO-220-5L MILLIMETERS MIN. MAX. A 4.064 4.826 A1 2.032 2.921 b 0.635 1.016 C 0.304 0.460 D 3.429 3.683 D1 7.620 9.398 d 2.620 2.870 E 9.779 10.668 E1 4.953 5.220 φ 3.708 3.962 e 1.524 2.032 F 1.143 1.397 L 13.589 14.351 L e b C A1 Note : Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) 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 a significant injury to the user. 11