ame5251 AME, Inc., ame5251 Datasheet
ame5251
Related parts for ame5251
ame5251 Summary of contents
Page 1
... Capable of delivering 1A output cur-rent each channel over a wide input voltage range from 2.5V to 5.5V, the AME5251 is ideally suited for single Li- Ion battery powered applications. 100% duty cycle pro- vides low dropout operation, extending battery life in por- table systems ...
Page 2
... AME AME5251 n Function Block Diagram FB1 4 0.6V 0.6V VREF 0.55V UVDET 6 EN1 FB2 10 0.6V 0.6V VREF 0.55V UVDET 12 EN2 2 Dual 1A, 1.5MHz Synchronous Constant Off-time Slope Mode COMP Select PWM COMP LOGIC NMOS Soft COMP Start IRCOMP OSC Constant Off-time Slope Mode COMP Select PWM COMP ...
Page 3
... Input Supply Voltage Pin. IN Bypass this pin with a capacitor as close to the device as possible. SW Switch Node Connection to Inductor. GND Ground. Tie directly to ground plane. FB Output voltage Feedback input. Rev.A.02 Dual 1A, 1.5MHz Synchronous AME5251-AVCxxxxxx 1. IN2 2. SW2 3. GND 4. FB1 5. NC1 6. EN1 7. IN1 8. SW1 9. GND 10. FB2 11 ...
Page 4
... AME AME5251 n Ordering Information AME5251 - xxx xxx Pin Configuration & Special Feature A 1 IN2 2. SW2 (DFN-12A) 3. GND 4. FB1 5. NC1 6. EN1 7. IN1 8. SW1 9. GND 10. FB2 11. NC2 12. EN2 4 Dual 1A, 1.5MHz Synchronous Output Voltage 2 Output Voltage 1 Number of Pins Package Type Pin Configuration & Special Feature ...
Page 5
... AME AME5251 n Available Opetions Part Number AME5251-AVCADJADJ Note: 1. The first 3 places represent product code assigned by AME such as CBL . 2. A bar on top of first letter represents Green Part such as A5251. 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 AME5251 n Recommended Operating Conditions Parameter Supply Voltage Voltage Ambient Temperature Range Junction Temperature Range 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 Dual 1A, 1.5MHz Synchronous ...
Page 7
... AME AME5251 n Electrical Specifications ( For Customer ) V =3.6V, V =2.5V, V =0.6V, L=2 OUT FB Parameter Input voltage Adjustable Output Range Feedback Voltage Feedback Pin Bias Current Quiescent Current (For Adjustable Output Voltage) Shutdown Current Switch Frequency High-side Switch On-Resistance Low-side Switch On-Resistance Switch Current Limit ...
Page 8
... P-channel MOSFET and the inductor. n Application Information The basic AME5251 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 AME5251 does not dissipate much heat due to its high efficiency. But, in applications where the AME5251 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
... Figure 9: 1.6V Step-Down Regulator PC Board Layout Checklist When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the AME5251. Check the following in your layout: 1. The power traces, consisting of the GND trace, the SW trace and the V 2. Does the V ...
Page 11
... AME AME5251 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 Dual 1A, 1.5MHz Synchronous Current Rating DCR (mA) ...
Page 12
... AME AME5251 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 1. ...
Page 13
... AME AME5251 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 4.0 V (V) IN 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.02 Dual 1A, 1.5MHz Synchronous V = 3.6V IN ...
Page 14
... AME AME5251 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 L 14 Dual 1A, 1.5MHz Synchronous 1.2V OUT ...
Page 15
... AME AME5251 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 Dual 1A, 1.5MHz Synchronous ...
Page 16
... AME AME5251 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 DFN-12A (3mmx3mmx0.75mm) PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package DFN-12A (3x3x0.75mm ...
Page 17
... AME AME5251 n Package Dimension DFN-12A (3mmx3mmx0.75mm) D TOP VIEW A REAR VIEW Rev.A.02 Dual 1A, 1.5MHz Synchronous BOTTOM VIEW SYMBOLS Step-Down Converter L PIN 1 IDENTIFICATION PIN 1 MILLIMETERS INCHES MIN MAX MIN 0.700 0.800 0.028 0.000 0.050 0.000 0.203REF. ...
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. ...