ame5253 AME, Inc., ame5253 Datasheet
ame5253
Available stocks
Related parts for ame5253
ame5253 Summary of contents
Page 1
... Capable of delivering 1A output cur- rent over a wide input voltage range from 2.5V to 5.5V, the AME5253 is ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable sys- tems ...
Page 2
... AME AME5253 n Function Block Diagram FB/ OUT 6 0.6V 0.6V VREF 0.55V UVDET Constant Off-time Slope Mode COMP Select PWM COMP LOGIC NMOS Soft COMP Start IRCOMP OSC Figure 3: Founction Block Diagram 1A, 1.5MHz Synchronous Step-Down Converter IN VIN GND 5 Rev. A.02 ...
Page 3
... Pin Name GND OUT 1A, 1.5MHz Synchronous Step-Down Converter SOT-25 Top View AME5253-BEVxxx GND AME5253 OUT Die Attach: Conductive Epoxy Pin Description No connection. Not internally connected. Can left floating or connected to GND. Ground. Tie directly to ground plane. ...
Page 4
... AME AME5253 n Ordering Information AME5253 - xxx Pin Configuration A (SOT-25) B (SOT-25) 4 Output Voltage Number of Pins Package Type Pin Configuration Package Type 1. EN E:SOT-2X 2. GND GND OUT 1A, 1.5MHz Synchronous Step-Down Converter Number of Output Voltage Pins V: 5 100: 1.0V 120: 1 ...
Page 5
... AME AME5253 n Available Options Part Number Marking* AME5253-AEVADJ CENMXX Note: 1. The first 3 places represent product code assigned by AME such as CEN bar on top of first letter represents Green Part such as CEN. 3. The last 3 places MXX represent Marking Code. It contains M as date code in "month" code and that is for AME internal use only ...
Page 6
... AME AME5253 n Thermal Information Parameter Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10Sec)** * Measure on backside center of Exposed Pad MIL-STD-202G 210F 6 Package Die Attach SOT-25 Conductive Epoxy 1A, 1.5MHz Synchronous Step-Down Converter Symbol Maximum 260 JA P 400 ...
Page 7
... AME AME5253 n Electrical Specifications V =3.6V, V =2.5V, V =0.6V, L=2 OUT FB Parameter Input voltage Output Voltage Accuracy Adjustable Output Range Feedback Voltage Feedback Pin Bias Current Quiescent Current (For Adjustable Output Voltage) Quiescent Current (For Fixed Output Voltage) Shutdown Current Switch Frequency High-side Switch On-Resistance ...
Page 8
... P-channel MOSFET and the inductor. n Application Information The basic AME5253 application circuit is shown in Typi- cal Application Circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and followed ...
Page 9
... In most applications the AME5253 does not dissipate much heat due to its high efficiency. But, in applications where the AME5253 is running at high ambient tempera- ture with low supply voltage and high duty cycles, such as in dropout, the heat dissipated may exceed the maxi- mum junction temperature of the part ...
Page 10
... When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the AME5253. These items are also illustrated graphically in Figures 10 and Figures 11 . Check the following in your layout: 1. The power traces, consisting of the GND trace, the SW trace and the V 2 ...
Page 11
... AME AME5253 n Application Information External components selection Inductance Supplier ( H) TAIYO YUDEN 2.2 GOTREND 2.2 Sumida 2.2 Sumida 4.7 TAIYO YUDEN 4.7 GOTREND 4.7 Supplier TDK MURATA TAIYO YUDEN TAIYO YUDEN TDK MURATA MURATA TAIYO YUDEN Table 2. Recommended Capacitors for C Rev.A.02 Current Rating DCR (mA 1480 60 1500 58 1500 ...
Page 12
... AME AME5253 n Characterization Curve (For reference only) Efficiency vs. Output Current 100 2. 2.2 H OUT OUT 40 0 Output Current(mA) Efficiency vs. Output Current 100 1. 2.2 H OUT OUT 40 0 Output Current (mA) Efficiency vs. Output Current 100 ...
Page 13
... AME AME5253 n Characterization Curve (For reference only) Reference Voltage vs. Temperature 0.620 0.615 0.610 0.605 0.600 0.595 0.590 0.585 0.580 -50 -25 0 +25 Temperature ( Frequency vs. Supply Voltage 1.70 1.65 1.60 1.55 1.50 1.45 1.40 1.35 1.30 1.25 1.20 1.15 1.10 2.5 3.0 3.5 4 Current Limit vs. Temperature 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 -40 -25 -10 +5 +20 +35 +50 +65 +80 +95 +110 +125 Temperature ( Rev.A. 3.6V IN +50 +75 +100 ...
Page 14
... AME AME5253 n Characterization Curve (For reference only) Current Limit vs. Temperature 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 -40 -25 -10 +5 +20 +35 +50 +65 +80 +95 +110 +125 Temperature ( Power Off from div 1.8V OUT OUT 2V/div 2V/div OUT 500mA/div 5. 1.2V OUT ...
Page 15
... AME AME5253 n Characterization Curve (For reference only) Load Step div 1.8V OUT I = 50mA~1A~50mA OUT 100mV/div OUT 500mA/div OUT Load Step div 1.8V OUT I = 200mA~1A~200mA OUT 100mV/div OUT 500mA/div OUT Rev.A.02 1A, 1.5MHz Synchronous ...
Page 16
... AME AME5253 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 SOT-25 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) SOT- ...
Page 17
... AME AME5253 n Package Dimension SOT-25 Top View D S1 PIN 1 e Front View b 0.70 BSC 0.95 BSC 0.95 BSC 1.90 BSC Rev.A.02 Side View SYMBOLS θ Note: 1. Lead pattern unit description: BSC: Basic. Represents theoretical exact dimension or dimension target. 2. Dimensions in Millimeters. ...
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. ...