aoz1214 Alpha & Omega Semiconductor, aoz1214 Datasheet
aoz1214
Related parts for aoz1214
aoz1214 Summary of contents
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... General Description The AOZ1214 is a high efficiency, simple to use, buck regulator plus one linear regulator controller optimized for a variety of applications. The AOZ1214 works from a 4.5V to 28V wide input voltage range. The buck regulator provides continuous output current. Each output voltage is adjustable down to 0 ...
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... Input Supply Pin. The input range is between 4.5V and 28V. Rev. 1.0 December 2010 Package 4x3 DFN-12L for additional information BST BIAS 2 11 PGND AGND 3 10 EN1 LDRV 4 9 AGND EN2 FB2 5 8 FB1 COMP 6 7 DFN-12 (Top View) Pin Function www.aosmd.com AOZ1214 Environmental Green Product Page ...
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... Note: 1. The value of Θ -0.3V to 30V JA FR-4 board with 2oz. Copper still air environment with +150° 25°C. The value in any given application depends on the A user's specific board design. -65°C to +150°C www.aosmd.com AOZ1214 VIN + ISen – BST PGND Rating ) 4 ...
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... EN1 EN2 0.788 Off Threshold On Threshold 2.5 315 4 T Rising J T Falling 0V Vfb2 = 0.7V, 4 LDRV Iout = 20mA, Iout1 = 0 Vfb2 = 0.7V, Iout1 = 0 10 www.aosmd.com AOZ1214 Typ. Max. Units 4 μ 0.8 0.812 V 0.5 % 0.1 % 200 200 50 nA ...
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... INPUT 5 3.3V INPUT 0.5 1.0 1.5 2.0 2.5 Load (A) VFB1 vs. Vin (Vout = 3.3V 6.8µH, 25°C) 0.85 0.84 0.83 0.82 0.81 0.80 0.79 0.78 0.77 0.76 0. Vin (V) www.aosmd.com AOZ1214 Efficiency (Vin = 5V 6.8µH) 100% 95% 3.3V OUTPUT 90% 1.8V OUTPUT 85% 80% 75% 70% 3.0 0 0.5 1.0 1.5 2.0 2.5 Load Current (A) Soft Start Time (Vout = 3.3V 6.8µH, 25° ...
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... LDRV Source Current vs. Temp (VFB2 = 0.7V, LDRV = 4V -45 -30 - Temperature (°C) Vo Ripple 1.5A–3A 200mV/Div Io 1A/div www.aosmd.com AOZ1214 VFB1 vs. Temp (Vin = 12V, Vout = 3.3V 6.8µH) 0.85 0.84 0.83 0.82 0.81 0.80 0.79 0.78 0.77 0.76 0.75 90 -45 -30 - Temperature (°C) EN1,2 Off vs. Temp (Vout = 3.3V 6.8µH) 3 ...
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... The inductor current is freewheeling through the Schottky diode to output. Switching Frequency The AOZ1214 switching frequency is fixed and set by an internal oscillator. The switching frequency is set 370 kHz. Output Voltage Programming Output voltage can be set by feeding back the output to the FB pin with a resistor divider network ...
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... Input Capacitor The input capacitor (C in Figure 1) must be connected to 1 the V pin and GND pin of the AOZ1214 to maintain IN steady input voltage and filter out the pulsing input current. The voltage rating of input capacitor must be greater than maximum input voltage plus ripple voltage. ...
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... ESR For lower output ripple voltage across the entire operating temperature range, X5R or X7R dielectric type of ceramic, or other low ESR tantalum capacitor or aluminum electrolytic capacitor may also be used as output capacitors. www.aosmd.com AOZ1214 1 ⎞ ------------------------- + ⎠ × × ⎞ ...
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... COMP pin sets the pole-zero and is adequate for a stable high-bandwidth control loop. In the AOZ1214, FB pin and COMP pin are the inverting input and the output of internal transconductance error amplifier. A series R and C compensation network connected to COMP provides one pole and one zero. ...
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... A minimum output capacitor of 4.7 prevent oscillations and provide good transient response. The ESR value should be maintained in the range that determines the loop stability. When small signal ringing www.aosmd.com AOZ1214 ⎛ ⎞ R3 × 1 ------- - + ⎝ ...
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... The second loop starts from inductor, to the output capacitors and load, to the GND pin of the AOZ1214, to the LX pins of the AZO1214. Current flows in the second loop when the low side diode is on. In PCB layout, minimizing the two loops area reduces the noise of this circuit and improves efficiency ...
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... Pour copper plane on all unused board area and connect it to stable DC nodes, like VIN, GND or VOUT. 5. Keep sensitive signal trace such as trace connected with FB pin and COMP pin far away form the LX pins. Top Side Bottom Side Figure 3. Layout Example for the AOZ1214 www.aosmd.com AOZ1214 Page ...
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... BSC E1 1.45 1.60 1.70 e 0.50 BSC L 0.30 0.40 0.50 0.30 L1 0.61 0.715 0.82 L2 0.21 0.315 0.42 L3 0.30 REF. aaa 0.15 Unit: mm bbb 0.10 ccc 0.10 ddd 0.08 www.aosmd.com AOZ1214 BOTTOM VIEW Seating Plane Dimensions in inches Symbols Min. Nom. Max. A 0.031 0.035 0.039 A1 0.000 0.001 0.002 A3 0.008 REF. b 0.008 0.009 0.014 D 0.157 BSC D1 0 ...
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... 1.10 1.50 1.50 12.0 1.75 ±0.10 ±0.3 ±0.10 Min. +0.10/-0 ø79.0 12.4 17.0 ø13.0 ±2.0 ±1.0 ±0.5 +2.0/-0 +2.6/-0 Components Tape Orientation in Pocket www.aosmd.com AOZ1214 Feeding Direction 5.50 8.00 4.00 2.00 0.30 ±0.05 ±0.10 ±0.10 ±0.10 ±0. 10.5 2.0 — — — ±0.2 ±0.5 Leader Tape 500mm Min ...
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... FAYWLT Assembly Lot Code Year & Week 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 AOZ1214 Page ...