ame5268 AME, Inc., ame5268 Datasheet
ame5268
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ame5268 Summary of contents
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... AME AME5268 n General Description The AME5268 is a fixed frequency monolithic synchro- nous buck regulator that accepts input voltage from 4.75V to 28V. Two NMOS switches with low on-resistance are integrated on the die. Current mode topology is used for fast transient response and good loop stability. ...
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... AME AME5268 n Function Block Diagram 1.1V OVDET OVP FB 0.3V osc COMP 6uA 0.925V 2.5V LOCKOUT CMP 2 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter CURRENT SENSE AMP SLOPE CLK PWM CLAMP OVP OTP UVP 1.5V REGULATORS SHUTDOWN CMP MH LOGIC ML OTDET UVLO IRCMP IN INTERNAL VIN ...
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... SOP-8/PP Top View AME5268 Note: The area enclosed by dashed line represents Exposed Pad and connect to GND. Rev. A.01 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter AME5268-AZA GND COMP 7. EN Die Attach Conductive Epoxy ...
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... AME AME5268 n Pin Description Pin Number Pin Name GND COMP 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter Pin Description High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N- Channel MOSFET switch. Connect a 10nF or greater capacitor from power the high side switch ...
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... AME AME5268 n Ordering Information AME5268 - xxx Pin Configuration (SOP-8/PP GND COMP Rev. A.01 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter Output Voltage Number of Pins Package Type Pin Configuration Package Number of Type Pins Z: SOP/ Output Voltage ...
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... AME5268 n Available Options Part Number Marking A5268 AME5268-AZAADJ AMyMXX Note: 1. The first 2 places represent product code assigned by AME such as AM year code and is the last number of a year. Such as the year code of 2008 bar on top of first letter represents Green Part such as A5268. ...
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... AME AME5268 n Absolute Maximum Ratings Parameter Supply Voltage Switch Voltage Boost Switch Voltage All Other Pins EN Voltage ESD Classification Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. HBM B: 2000V ~ 3999V n Recommended Operating Conditions Parameter Ambient Temperature Range ...
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... AME AME5268 n Thermal Information Parameter Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Maximum Junction Temperature Solder Iron(10 Sec)** * Measure on backside center of Exposed Pad MIL-STD-202G 210F 8 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter Package Die Attach SOP-8/PP SOP-8/PP ...
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... AME AME5268 n Electrical Specifications 12V unless otherwise noted Parameter Shutdown Current Supply Current Feedback Voltage OVP Threshold Voltage Error Amplifier Voltage Gain Error Amplifier Transconductance High-side Switch On Resistance Low-side Switch On Resistance Switch Leakage Current High-side Switch Current Limit ...
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... AME AME5268 n Electrical Specifications (Contd 12V unless otherwise noted Parameter EN Shutdown Threshold Voltage EN Shutdown Threshold Voltage Hysteresis EN Lockout Hysteresis Thermal Shutdown Temperature Thermal Shutdown Hysteresis 10 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter Test Condition Symbol V Rising EN OTP Shutdown, temperature increasing ...
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... FB pin voltage drops lower than the threshold, the high- side MOSFET will be enabled again. Thermal Shutdown The AME5268 protects itself from overheating with an internal thermal shutdown circuit. If the junction tempera- ture exceeds the thermal shutdown trip point, the voltage reference is grounded and the high-side MOSFET is turned off ...
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... For simplification, the output ripple can be approximated to: IN The characteristics of the output capacitor also affect the stability of the regulation system. The AME5268 can be optimized for a wide range of capacitance and ESR values. 3A, 28V, 340KHz Synchronous = 2V , where IC1 = I ...
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... AME AME5268 n Detailed Description (Contd.) Compensation Components AME5268 has current mode control for easy compensa- tion and fast transient response. The system stability and transient response are controlled through the the output of the internal transconductance error OMP amplifier. A series capacitor-resistor combination sets a pole-zero combination to govern the characteristics of the control system ...
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... AME AME5268 n Detailed Description (Contd.) 3. Determine if the second compensation capacitor (C6) is required required if the ESR zero of the output capaci- tor is located at less than half of the switching frequency, or the following relationship is valid ESR If this is the case, then add the second compensation ca- pacitor (C6) to set the pole fP3 at the location of the ESR zero ...
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... AME AME5268 n Characterization Curve(For reference only) Efficiency vs. Output Current 100 100 1000 Output Current (mA) Frequency vs. Temperature 400 390 380 370 360 350 340 330 320 310 300 290 280 270 260 -50 -25 0 +25 Temperature ( Rev. A.01 Rectified Step-Down Converter ...
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... AME AME5268 n Characterization Curve(For reference only) Power Off from 400 S / div V = 12V OUT I = 3000mA OUT 5V/div 5V/div OUT 2A/div 2A/div OUT Load Step 200 S / div V = 12V OUT I = 0mA to 3000mA OUT ...
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... AME AME5268 n Characterization Curve(For reference only) Load Step 200 S / div V = 12V OUT I = 500mA to 3000mA OUT 470pF 1V/div COMP 500mV/div OUT 2A/div 2A/div OUT Rev. A.01 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter Stead State Test ...
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... AME AME5268 n Date Code Rule Month Code 1: January 7: July 2: February 8: August 3: March 9: September 4: April A: October 5: May B: November 6: June C: December n Tape and Reel Dimension SOP-8/PP PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) SOP-8/PP 12.0±0 3A, 28V, 340KHz Synchronous ...
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... AME AME5268 n Package Dimension SOP-8/PP TOP VIEW FRONT VIEW Rev. A.01 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter SIDE VIEW SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX 1.350 1.750 0.053 ...
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... 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 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. ...