AME5106AIHAADJZ

AME5106 AME | Alldatasheet

Document overview

• Manufacturer or author: pROVIDED bY alldatasheet.com(free datasheet download site)
• PDF pages: 12

Technical content

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C l Input voltage: 3.6V to 18V. l Output voltage: 0.8V to VCC. l Duty ratio: 0% to 100% PWM control l Oscillation frequency: 350KHz typ. l Soft-start, Current limit, Enable function l Thermal Shutdown function l Built-in internal SW P-channel MOS l SOP-8 Package l All AME’s Lead Free Products Meet RoHS Standards AME5106 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control cir- cuit is able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier cir- cuit as well as a soft-start circuit that prevents overshoot at startup. An enable function, an over current protect func- tion and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced from 350KHz to 30KHz. Also, an internal compensation block is built in to minimum external com- ponent count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the SOP-8L mini-package, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 18V, it is also suitable for the operation via an AC adapter. n General Description n Features n Applications S l PC Motherboard l LCD Monitor l Graphic Card l DVD-Video Player l Telecom Equipment l ADSL Modem l Printer and other Peripheral Equipment l Microprocessor core supply l Networking power supply

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter n Typical Application n Function Block Diagram SW IN GND FB 100mAVEN Thermal Shutdown Oscillation Circuit Reference Voltage Source with Soft Start PWM-Switched Control Circuit OCSETEN VOUT 2.5V 3.3V 5V L1 Value 22uH 27uH 33uH VIN=12V,IMAX=2A Note: VOUT = V FB x (1+RA/RB) RB=0.7K~ 5K Ω

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C n Pin Configuration SOP-8 Top View AME5106 1. FB 2. EN 3. OCSET 4. IN 5. SW 6. SW 7. GND 8. GND * Die Attach: Conductive Epoxy n Pin Description 1 32 4 AME5106 5678 Pin Number Pin Name Pin Description 1 FB Output voltage Feedback input. Set the output voltage by selecting values for Ra and Rb using: Connect the ground of the feedback network to an AGND (Analog Ground) plane which should be tied directly to the GND pin. 2 EN Enable Control Input, active high. The enable pin is an active high control. Tie this pin above 2V to enable the device. Tie this pin below 0.8V to shut down the device. In shutdown, all function are disabled. Do not leave EN pin floating. 3 OCSET Add an external resistor to set max output current . 4 IN Input Supply Voltage Pin. Bypass this pin with a capacitor . The capacitor shall be placed as close to the device as possible. 5,6 SW Switch Node Connection to Inductor. 7,8 GND Ground. Tie directly to ground plane.  += Rb RbRaVVOUT 8.0

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter n Ordering Information Operating Ambient Temperature Range Number of Pins Package Type Pin Configuration Special Feature AME5106 x x x x xxx x Output Voltage n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME5106AIHAADJZ 5106 AADJ yyww ADJ SOP-8 -20OC to 85OC A 1. FB I: -20OC to 85OC H: SOP A: 8 ADJ: Adjustable Z: Lead free (SOP-8) 2. EN 3. OCSET 4. IN 5. SW 6. SW 7. GND 8. GND Output Voltage Special FeaturePin Configuration Operating Ambient Temperature Range Package Type Number of Pins Note: ww represents the date code. * A line on top of the first letter represents lead free plating such as 5106 AADJ yyww. Please consult AME sales office or authorized Rep./Distributor for the availability of package type.

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C n Absolute Maximum Ratings n Recommended Operating Conditions Caution: Stree above the listed absolute maximum rating may cause permanent damage to the device. *HBM B: 2000~3999V n Thermal Information * Measure θ JC on center of molding compound if IC has no tab. ** MIL-STD-202G-210F Parameter Package Die Attach Symbol Maximum Unit Thermal Resistance* (Junction to Case) SOP-8 θ JC 60 Thermal Resistance (Junction to Ambient) SOP-8 θ JA 150 Internal Power Dissipation SOP-8 PD 810 mW 350 oCSolder Iron (10 Sec)** Conductive Epoxy oC / W Parameter Symbol Maximum Unit Input Supply Voltage IN -0.3V to 22V EN,SW Pin Voltages VEN, VSW -0.3V to 0.3V FB Pin Voltage VFB -0.3V to VIN ESD Classification V TBD* Parameter Symbol Rating Unit Ambient Temperature Range TA -20 to 85 oC Junction Temperature Range TJ -20 to 125 oC Storage Temperature Range TSTG -40 to 150 oC

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter n Electrical Specifications VIN = 12V, TA = 25oC,Unless otherwise specified. Parameter Symbol Min Typ Max Units Input Voltage VIN 3.6 18 V Feedback Voltage VFB 0.782 0.8 0.818 V FB Pin Bias Current IFB 0.1 0.5 µA Switch Current ISW 2.5 A Current Consumption During Power Off ISSS 10 µA Output Voltage Line Regulation REGLINE 2 4 % Output Voltage Load Regulation REGLOAD 0.2 0.5 % Oscillator Frequency fOSC 300 350 400 KHz Frequency of Current Limit or Short Circuit Protect fOSC1 10 KHz Enable High (enabled) VIH_EN 2.0 Enable Low (shutdown) VIL_EN 0.8 EN High Input Current IIH_EN 20 µA EN Low Input Current IIL_EN -10 µA OCSET Pin Bias Current IOCSET 75 90 105 µA Soft Start Time tSS 0.3 2 5 mS VIN=5V 110 150 VIN=12V 70 100 Efficiency η 92 % Measure wave form at SW pin V mΩ Test Condition VEN=0V IOUT=0.1A IOUT=0.1A Measure wave form at SW pin VIN=5V to 18V IOUT=0.1A to 2A Internal MOSFET RDSON RDSON VFB=0V VIN=12V, VOUT=5V, IOUT=2A Evaluate oscillation at SW pin Evaluate oscillation stop at SW pin

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C n Detailed Description PWM Control The AME5106 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the AME5106, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current. Under Voltage Lockout The under voltage lockout circuit of the AME5106 assures that the high-side MOSFET driver outputs remain in the off state whenever the supply voltage drops below 3.3V. Normal operation resumes once VCC rises above 3.5V. RDS(ON) Current Limiting The current limit threshold is setting by the external resistor connecting from VCC supply to OCSET. The internal 100uA sink current crossing the resistor sets the voltage at the pin of OCSET. When the PWM voltage is less than the voltage at OCSET, an over-current condition is triggered. I LOAD x RDS(ON) =IOCSET x ROCSET See above formula for setting the current limit value.

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter n Characterization Curve(For reference only) Vin vs. FB Line Regulation 0.74 0.75 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84 0 2 4 6 8 10 12 14 16 18 VIN(V) VFB(V) IOUT=0.2A VOUT=3.3V VIN=12V VIN (V) 3.10 3.15 3.20 3.25 3.30 3.35 3.40 0 2 4 6 8 10 12 14 16 18 VOUT(V) IOUT=0.2A VOUT=3.3V Load Regulation VIN v.s Frequency 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 0 0.5 1 1.5 2 IOUT ( A ) VOUT ( V ) VIN=12V Efficiency Vout Ripple 340 345 350 355 360 365 370 375 380 0 2 4 6 8 10 12 14 16 18 VIN (V) Fosc (KHZ) IOUT=0.2A VOUT=3.3V 100 0 0.5 1 1.5 2 2.5 IOUT ( A ) Efficiency (% ) VOUT=5V VOUT=3.3V IOUT=0.1A VOUT=3.3V VIN=12V 20mV/div 5V/div VOUT VSW

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C n Characterization Curve(For reference only) Vout Ripple Frequency of short current protect Soft start time IOUT=2A VOUT =3 .3V VIN=12V 20mV/div 5V/div VOUT VSW 5V/divVSW 2V/div 5V/div 5V/div VOUT VSW EN ILOAD =2A VOUT =5V VIN =12V

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter n Tape and Reel Dimension PIN 1 W PAME AME Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP-8 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm Carrier Tape, Number of Components Per Reel and Reel Size SOP-8

AME, Inc. AME5106 Rev.A.01 PWM Control 2A Buck Converter C n Package Dimension SOP-8 MIN MAX MIN MAX A 1.35 1.75 0.05315 0.0689 A1 0.10 0.30 0.00394 0.01181 B 0.33 0.51 0.01299 0.02008 C 0.19 0.25 0.00748 0.00984 D 4.80 5.33 0.18898 0.20984 E 3.80 4.00 0.14961 0.15748 e L 0.40 1.27 0.01575 0.05000 H 5.80 6.30 0.22835 0.24803 y - 0.10 - 0.00394 q 0o 8o 0o 8o SYMBOLS MILLIMETERS INCHES 1.473 REF 0.05799 REF 1.27 BSC 0.05000 BSC 7o(4X) Top View Side View Front View D E A A2A1e B H θ L C

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. , December 2007 Document: ORT6513-DS5106-A.01 Corporate Headquarter U.S.A. (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Santa Clara, CA. 95054-2438 Tel: 886 2 2627-8687 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489 www.ame.com.tw E-Mail: sales@ame.com.tw