AOZ1214DI
AOZ1214DI Datasheet
AOZ1214
| Part | Datasheet |
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AOZ1214DI |
AOZ1214DI (pdf) |
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| AOZ1214 EZBuck 3A Simple Buck Regulator with Linear Controller 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 up to 3A of continuous output current. Each output voltage is adjustable down to 0.8V. The buck regulator and LDO can be enabled independently. The AOZ1214 is available in a 4x3 DFN-12 package and can operate over a -40°C to +85°C ambient temperature range. z 4.5V to 28V operating input voltage range z Integrated linear regulator controller z 40 internal NFET, efficiency up to 95% z Internal soft start z Each output voltage adjustable down to 0.8V z 3A continuous output current z Fixed 370 kHz PWM operation z Cycle-by-cycle current limit z Short-circuit protection z Thermal shutdown z Small size 4x3 DFN-12 package z Independent enable input for Buck and LDO z Point of load DC/DC conversion z Set top boxes z LCD Monitors & TVs z Cable modems z Telecom/Networking/Datacom equipment C1 22µF C5 0.1µF VOUT1 C6 1µF VOUT2 R3 10k C7 4.7µF VIN EN2 EN1 BS LDRV AOZ1214 FB1 FB2 VBIAS COMP GND R4 8.06k 1µF 2.2nF L1 6.8µH VOUT1 R1 31.6k R2 10k C2, C3 22µF x 2 Figure Typical Application Circuit Page 1 of 16 AOZ1214 Ordering Information Part Number AOZ1214DI Ambient Temperature Range -40°C to +85°C Package 4x3 DFN-12L AOS Green Products use reduced levels of Halogens, and are also RoHS compliant. Please visit for additional information. Environmental Green Product Pin Configuration LX 1 BST 2 PGND 3 EN1 4 EN2 5 FB1 6 IN AGND 12 IN 11 BIAS 10 AGND 9 LDRV 8 FB2 7 COMP DFN-12 Top View Pin Description Pin Number Pin Name LX BST PGND COMP LDRV AGND BIAS Pin Function Buck Regulator Switching Node. Buck Regulator Bootstrap Pin. BST is the high side driver supply. Connect a 0.1uF capacitor between BST and LX to form a bootstrap circuit. Power Ground. Enable1 input for buck regulator. EN1 is active high. Connect EN1 to IN if not used. Do not leave EN1 floating. Enable2 input for linear regulator. EN2 is active high. Buck Regulator Feedback Input. FB1 is regulated to 0.8V. Set the buck regulator output voltage using a resistive voltage divider. Buck Regulator Compensation Pin. COMP is the output of the internal transconductance error amplifier. Connect a RC network between COMP and GND to compensate the control loop. Linear Regulator Feedback Input. FB2 is regulated to 0.8V. Set the linear regulator output voltage using a resistive voltage divider. Linear Regulator Drive Output. LDRV controls the gate of an external pass transistor. Analog Ground. Internal Bias Regulator Output. Connect a 1uF between BIAS and GND. Input Supply Pin. The input range is between 4.5V and 28V. Page 2 of 16 AOZ1214 Block Diagram VBIAS EN2 EN1 FB COMP COMP UVLO & POR 5V LDO Regulator Reference & Bias Softstart 1 0.8V GM = 200µA/V EAmp PWM Comp ILimit PWM Control Logic ISen 0.3V |
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