aoz1280 Alpha & Omega Semiconductor, aoz1280 Datasheet
aoz1280
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aoz1280 Summary of contents
Page 1
... General Description The AOZ1280 is a high efficiency, simple to use, 1.2 A buck regulator which is flexible enough to be optimized for a variety of applications. The AOZ1280 operates from input voltage range, and provides continuous output current. The output voltage is adjustable down to 0.8 V. The fixed 1.5 MHz PWM switching frequency reduces inductor size ...
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... LX PWM output connection to inductor. Rev. 1.0 May 2011 Package -40 °C to +85 °C SOT23-6L for additional information. BST GND VIN SOT23-6L (Top View) Pin Function www.aosmd.com AOZ1280 Environmental Green Product RoHS Compliant Page ...
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... Load < 1.08 A Load = 600 800 mV FB Off Threshold On Threshold T Rising J T Falling 3 www.aosmd.com AOZ1280 Parameter Rating ) 3 0 -40 °C to +85 ° 220 °C/W Min. Typ. Max 2.9 2.3 200 > 1 1.5 8 ...
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... Block Diagram Enable Softstart EN Detect FB – + 0.8V Amplifier Rev. 1.0 May 2011 VIN Regulator Current + Sense Ramp OC Generator CLK OSC PWM Logic – Error + PWM Comparator GND www.aosmd.com AOZ1280 BST BST LDO Driver LX Page ...
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... Io 1A/div 500ns/div Short Circuit Recovery Vlx 10V/div Vo 1V/div lL 1A/div 2ms/div Start-up Through Enable with I Resistive Load Ven 5V/div Vo 2V/div Vlx 10V/div IL 1A/div 1ms/div www.aosmd.com AOZ1280 = 0.5A) Vo ripple 20V/div Vlx 10V/div IL 500mA/div Vlx 10V/div Vo 1V/div lL 1A/div = 1A OUT Ven 5V/div Vo 2/div Vlx 10V/div IL 1A/div ...
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... OUTPUT 1.0 1.2 0 Efficiency (V = 5V) vs. Load Current IN 5.0V OUTPUT 90 3.3V OUTPUT 0.2 0.4 0.6 0.8 1.0 Load Current (A) www.aosmd.com AOZ1280 = 25 °C, unless otherwise specified OUT Resistive Load Ven 5V/div Vo 2/div Vlx 10V/div IL 1A/div 1ms/div = 24V) vs. Load Current IN 5.0V OUTPUT 3.3V OUTPUT 0.2 0.4 0.6 0.8 1.0 1.2 Load Current (A) 1.2 Page ...
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... In the soft start process, the output voltage is typically ramped to regulation voltage in 400 μs. The 400 μs soft start time is set internally. The EN pin of the AOZ1280 is active high. Connect the EN pin to VIN if the enable function is not used. Pulling EN to ground will disable the AOZ1280. Do not leave EN open ...
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... Figure 1. Component selection is explained below. Input Capacitor The input capacitor must be connected to the V the GND pin of the AOZ1280 to maintain steady input voltage and filter out the pulsing input current. The voltage rating of the input capacitor must be greater than maximum input voltage plus ripple voltage. ...
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... A ground plane is strongly recommended to connect the input capacitor, the output capacitor, and the GND pin of the AOZ1280. In the AOZ1280 buck regulator circuit, the major power dissipating components are the AOZ1280, the Schottky diode and the output inductor. The total power dissipation of converter circuit can be measured by input power minus output power ...
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... The maximum junction temperature of AOZ1280 is 150 ºC, which limits the maximum load current capability. The thermal performance of the AOZ1280 is strongly affected by the PCB layout. Extra care should be taken by users during design process to ensure that the IC will operate under the recommended environmental conditions ...
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... D 2.70 2.90 3.10 E 2.50 2.80 3.10 E1 1.50 1.60 1.70 e 0.95 BSC e1 1.90 BSC L 0.30 — 0.60 θ1 0° — 8° www.aosmd.com AOZ1280 Seating Plane 0.25mm L θ1 Dimensions in inches Symbols Min. Nom. Max. A 0.035 — 0.049 A1 0.00 — 0.006 A2 0.028 0.043 0.047 b 0.012 0.016 0.020 c 0.003 0.005 0.008 D 0.106 0.114 0.122 E 0.098 0.110 ...
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... ø60.50 9.00 11.40 ø13.00 10.60 Min. ±0.30 ±1.0 +0.50 / -0.20 Components Tape Orientation in Pocket 125 Empty Pockets www.aosmd.com AOZ1280 Feeding Direction 4.00 4.00 2.00 0.25 ±0.10 ±0.10 ±0. 2.00 ø9.00 5.00 18.00 ±0.50 Leader Tape 500mm min. or ...
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... D Week & Year Code Assembly Location Code 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. www.aosmd.com AOZ1280 Page ...