IR3800MPBF IRF [International Rectifier], IR3800MPBF Datasheet
IR3800MPBF
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IR3800MPBF Summary of contents
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... Distributed Point-of-Loads • Embedded Systems • Computing Peripheral Voltage Regulators Fig. 1. Typical application diagram 11/04/08 IR3800MPbF HIGHLY INTEGRATED 12A Description TM The IR3800 SupIRBuck is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3800 a space-efficient solution, providing accurate power delivery for low output voltage applications ...
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... PGnd AGnd COMP AGnd AGnd SS OCSet Fig. 2: Package outline (Top view) PACKAGE PIN COUNT DESCRIPTION IR3800MTRPbF 15 IR3800MTR1PbF 15 PD-60352 IR3800MPbF o C θ θ PCB - PARTS PER REEL 4000 750 2 ...
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... Block Diagram Fig. 3. Simplified block diagram of the IR3800. 11/04/08 PD-60352 IR3800MPbF 3 ...
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... This pin powers the high side driver and must be connected to a voltage C higher than input voltage. A minimum of 0.1uF high frequency capacitor must be connected from this pin to the power ground (PGnd). 15 AGnd Signal ground for internal reference and control circuitry. Pins 4, 5 and 15 need to be connected together on system board. 11/04/08 IR3800MPbF Description PD-60352 4 ...
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... V =1.8V, Io=0A o SS=3V, V =24V =12V =1.8V, Io=0A o Supply ramping up Supply ramping down Supply ramping up and down Supply ramping up Supply ramping down Supply ramping up and down PD-60352 IR3800MPbF Max Units 125 =12V, 0 C<T (Ic)<105 Min TYP ...
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... Note2: Cold temperature performance is guaranteed via correlation using statistical quality control. Not tested in production. Note3: Guaranteed by Design but not tested in production. 11/04/08 Test Condition Min 540 Note3 Note3 Fb=0V 75 SS=3V SS= 1000 SS= Note3 , Note3 Hiccup SS Note3 Note3 PD-60352 IR3800MPbF TYP MAX Units 600 660 kHz 1. -0.1 -0 μ μmho 1300 1600 μ 0. μ ...
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... PD-60352 IR3800MPbF 125 C) Ic(static 100 120 Temp[oC] Ic(dynam ic 100 120 Tem p[oC] ISS 100 120 Tem p[oC] IOCSET 100 120 Tem p[oC] 7 ...
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... The output can be shutdown by pulling the soft- start pin below 0.3V. This can easily be done by using an external small signal transistor. During shutdown both MOSFET drivers will be turned off. Normal operation will resume by cycling soft start pin PD-60352 IR3800MPbF prevents oscillation and Vo Time 8 ...
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... Fig. 5: Soft-Start circuit for IR3800 Output of UVLO Soft-Start Voltage Current flowing into Fb pin zero. Voltage at negative input operating of Error Amp voltage Voltage at Fb pin Fig. 6: Theoretical operation waveforms PD-60352 IR3800MPbF 3V 40uA Error Amp 24K 24K POR 3V ≅ 2V ≅ 40uA 0uA ≅ 0.96V ...
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... Ch1: Inductor point, Ch3:OCSet --( 3 ) The value of R circuit to ensure that the over-current protection circuit activates as expected. The IR3800 current limit is designed primarily as disaster preventing, and doesn't operate as a precision current regulator. PD-60352 IR3800MPbF Deadtime Blanking time Clamp voltage should be checked in an actual SET 10 ...
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... MOSFET is switched on. For low voltage application, schottky diodes can used to minimize forward drop across the diodes at start up and R see Fig. 11: Charge pump circuit to generate 9 PD-60352 IR3800MPbF μ ≅ --( ) start is the desired start-up time (ms) ...
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... X5R and EIA 0805 case size) are a good choice. In the case of tantalum or low ESR electrolytic capacitors, the ESR dominates the output voltage ripple, equation (9) can be used to calculate the required ESR for the specific voltage ripple. PD-60352 IR3800MPbF , then the output inductor will be: These components can be Δ ...
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... Maximum Input Voltage Oscillator Ramp Voltage osc F = Crossover Frequency Zero Frequency of the Output Capacitor ESR F = Resonant Frequency of the Output Filter LC R and R = Feedback Resistor Dividers Error Amplifier Transconductance m PD-60352 IR3800MPbF (12) π ∗ 2 ESR Comp E POLE R 3 ...
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... R R Cross over frequency is expressed as ⎤ ⎞ ⎟ ⎟ ⎥ ⎠ ⎦ PD-60352 IR3800MPbF OUT E Comp 9 V REF Frequency (current source) ...
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... Select : π ref * ref PD-60352 IR3800MPbF ( ) 1 for Θ max = F and F 0 ≥ o OSC , KΩ , check Ω : ...
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... PC board layout at a single point. The Power QFN is a thermally enhanced package. Based on thermal performance it is recommended to use at least a 4-layers PCB. To effectively remove heat from the device the exposed pad should be connected to the ground plane using vias. PD-60352 IR3800MPbF bypass components such as including feedback 16 ...
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... Typical Application for IR3800 Fig.16: Typical Application circuit for 12V to 1.8V at 12A using ceramic output capacitors 11/04/08 12V to 1.8V @ 12A PD-60352 IR3800MPbF 17 ...
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... The pad lands (the 4 big pads other than the 11 IC pins) length and width should be equal to maximum part pad length and width. However, the minimum metal to metal spacing should be no less than 0.17mm for 2 oz. Copper; no less than 0.1mm for 1 oz. Copper and no less than 0.23mm for 3 oz. Copper. 11/04/08 PD-60352 IR3800MPbF 18 ...
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... Ensure that the solder resist in between the lead lands and the pad land is ≥ 0.15mm due to the high aspect ratio of the solder resist strip separating the lead lands from the pad land. 11/04/08 PD-60352 IR3800MPbF 19 ...
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... The maximum length and width of the land pad stencil aperture should be equal to the solder resist opening minus an annular 0.2mm pull back to decrease the incidence of shorting the center land to the lead lands when the part is pushed into the solder paste. 11/04/08 PD-60352 IR3800MPbF 20 ...
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... This product has been designed and qualified for the Consumer market. 11/04/08 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 10/07 PD-60352 IR3800MPbF TAC Fax: (310) 252-7903 21 ...