ame5269 AME, Inc., ame5269 Datasheet
ame5269
Available stocks
Related parts for ame5269
ame5269 Summary of contents
Page 1
... AME AME5269 n General Description The AME5269 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. ...
Page 2
... AME AME5269 n Function Block Diagram 1.1V OVP OVDET FB 0.3V OSC COMP 6uA 0.925V 2.5V LOCKOUT CMP 2 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter CURRENT SENSE AMP SLOPE CLK PWM CLAMP OVP OTP UVLO 1.5V REGULATORS SHUTDOWN CMP LOGIC ML OTDET UVLO IRCMP IN INTERNAL ...
Page 3
... AME AME5269 n Pin Configuration SOP-8 Top View AME5269 Rev. A.01 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter AME5269-AHAxxx GND COMP 7. EN Die Attach Conductive Epoxy ...
Page 4
... AME AME5269 n Pin Description SOP-8 Pin Number Pin Name GND COMP 2A, 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 0. greater capacitor from power the high side switch ...
Page 5
... AME AME5269 n Ordering Information AME5269 - xxx Pin Configuration (SOP- GND COMP Rev. A.01 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter Output Voltage Number of Pins Package Type Pin Configuration Package Number of Type Pins H: SOP Output Voltage ...
Page 6
... AME5269 n Available Options Part Number Marking A5269 AME5269-AHAADJ BMyMXX Note: 1. The first 2 places represent product code assigned by AME such as BM 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 A5269. ...
Page 7
... AME AME5269 n Recommended Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range Storage Temperature Range 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 center of molding compound if IC has no tab. ...
Page 8
... AME AME5269 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 ...
Page 9
... FB pin voltage drops lower than the threshold, the high- side MOSFET will be enabled again. Thermal Shutdown The AME5269 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 ...
Page 10
... For simplification, the output ripple can be approximated to: The characteristics of the output capacitor also affect the IN stability of the regulation system. The AME5269 can be optimized for a wide range of capacitance and ESR values. 2A, 28V, 340KHz Synchronous = 2V , where IC1 = I ...
Page 11
... AME AME5269 n Detailed Description (Contd.) Compensation Components AME5269 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 ...
Page 12
... AME AME5269 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 ...
Page 13
... AME AME5269 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 +50 Temperature ( Rev. A.01 2A, 28V, 340KHz Synchronous ...
Page 14
... AME AME5269 n Characterization Curve(For reference only) Power Off from 400 S / div V = 12V OUT I = 2000mA OUT 5V/div 5V/div OUT 2A/div 2A/div OUT Load Step 200 S / div V = 12V OUT I = 0mA to 2000mA OUT ...
Page 15
... AME AME5269 n Characterization Curve(For reference only) Load Step 200 S / div V = 12V OUT I = 500mA to 2000mA OUT 470pF 1V/div COMP 500mV/div OUT 2A/div 2A/div OUT Rev. A.01 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter Stead State Test ...
Page 16
... AME AME5269 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 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) SOP-8 12.0±0 2A, 28V, 340KHz Synchronous ...
Page 17
... AME AME5269 n Package Dimension SOP-8 Top View H PIN 1 D Front View 4X Rev. A.01 Rectified Step-Down Converter Side View θ 2A, 28V, 340KHz Synchronous MILLIMETERS SYMBOLS MIN MAX A 1.35 1.75 0.10 0. 1.473 REF A2 B 0.33 0.51 C 0.17 0.25 4.70 5.33 D 3.80 4.00 E 1.27 BSC e L 0.40 1.27 H 5.80 6. INCHES ...
Page 18
... 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. ...