aoz1051pi Alpha & Omega Semiconductor, aoz1051pi Datasheet
aoz1051pi
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aoz1051pi Summary of contents
Page 1
... General Description The AOZ1051PI is a high efficiency, easy to use synchronous buck regulator. The AOZ1051PI works from 4 input voltage range, and provides continuous output current with an output voltage adjustable down to 0.8 V. The AOZ1051PI comes in an exposed pad SO-8 package and is rated over a -40 ° ...
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... No Connect Pin. Pin 8 is not internally connected. Connect this pin externally to LX and use it for better thermal performance. Switching node the drain of the internal PFET used as the thermal pad of the power stage. www.aosmd.com AOZ1051PI Environmental Green Product Page ...
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... FR-4 board with 2 oz. Copper still air environment with -65 °C to +150 ° °C. The value in any given application depends on the A user’s specific board design. 2 series with 100 pF. www.aosmd.com AOZ1051PI VIN + ISen – Q1 Level Shifter + FET Driver ...
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... V OUT °C 0.788 A Off Threshold On Threshold Rising J T Falling www.aosmd.com AOZ1051PI Typ. Max. Units V 4.5 18 4.1 V 3.7 1.6 2.5 mA µ 0.8 0.812 V 0 200 nA 0 100 mV µ 400 ...
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... Vin ripple 0.1V/div Vo ripple 0.1V/div IL 2A/div VLX 10V/div Short Circuit Protection Vin 5V/div Vo 2V/div lin 2A/div Short Circuit Recovery Vo 0.1V/div Io 2A/div www.aosmd.com AOZ1051PI Vin ripple 0.5V/div Vo ripple 0.1V/div IL 2A/div VLX 10V/div 2µs/div LVX 10V/div Vo 2V/div IL 2A/div 20ms/div VLX 10V/div Vo 2V/div ...
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... FB voltage is ramped to follow the voltage of the soft start pin until it reaches 0.8 V. The voltage of the soft-start pin is charged by an internal 5 µA current. The EN pin of the AOZ1051PI is active high. Connect the EN pin to VIN if the enable function is not used. Pulling EN to ground will disable the AOZ1051PI. Do not leave EN open ...
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... This greatly improves the converter efficiency and reduces power loss in the low-side switch. The AOZ1051PI uses a P-Channel MOSFET as the high-side switch. This saves the bootstrap capacitor normally seen in a circuit using an NMOS switch. It also allows 100 % turn-on of the high-side switch to achieve linear regulation mode of operation ...
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... Figure 1. Component selection is explained below. Input Capacitor The input capacitor must be connected to the V the PGND pin of AOZ1051PI to maintain 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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... COMP pin sets the pole-zero and is adequate for a stable high-bandwidth control loop. In the AOZ1051PI, FB and COMP are the inverting input and the output of the internal error amplifier. A series R and C compensation network connected to COMP provides one pole and one zero. The pole is: ...
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... A ground plane is strongly recommended to connect the input capacitor, the output capacitor, and the PGND pin of the AOZ1051PI. In the AOZ1051PI buck regulator circuit, the major power is to set the cross dissipating components are the AOZ1051PI and the output inductor. The total power dissipation of converter ...
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... Layout Considerations The AOZ1051PI is an exposed pad SO-8 package. Several layout tips are listed for the best electric and thermal performance. 1. The exposed pad (LX) is connected to the internal PFET and NFET drains. Connected a large copper plane to the LX pin to help thermal dissipation not use a thermal relief connection to the VIN pin or the PGND pin ...
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... D0 3.20 3.40 D1 3.10 3.30 5.74 E 5.80 6.00 e — 1.27 E1 3.80 3.90 E2 2.21 2.41 E3 0.40 REF L 0.40 0.95 y — — θ 0 ° 3 ° | L1–L1' | — 0.04 L1 1.04 REF www.aosmd.com AOZ1051PI L1' θ Dimensions in inches Symbols Min. Nom. Max. 1.70 A 0.055 0.061 0.067 0.10 A1 0.000 0.002 0.004 1.60 A2 0.055 0.059 0.063 0.51 B 0.012 0.016 0.020 0.25 C 0.007 — 0.010 5.00 D 0.189 ...
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... ø97.00 13.00 17.40 ø13.00 ±0.10 ±0.30 ±1.00 +0.50/-0.20 Components Tape Orientation in Pocket www.aosmd.com AOZ1051PI Feeding Direction 8.00 4.00 2.00 0.25 ±0.10 ±0.10 ±0.10 ±0. 10.60 2.00 — — — ±0.50 Leader Tape 500mm min ...
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... WLT 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 AOZ1051PI Page ...