ir3800ampbf International Rectifier Corp., ir3800ampbf Datasheet
ir3800ampbf
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ir3800ampbf 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 IR3800AMPbF HIGHLY INTEGRATED 14A Description TM The IR3800A SupIRBuck is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3800A 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 IR3800AMTRPbF 15 IR3800AMTR1PbF 15 PD-60353 IR3800AMPbF o C θ θ PCB - PARTS PER REEL 4000 750 2 ...
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... Block Diagram Fig. 3. Simplified block diagram of the IR3800A. 11/04/08 PD-60353 IR3800AMPbF 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 IR3800AMPbF Description PD-60353 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-60353 IR3800AMPbF 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 270 Note3 Note3 Fb=0V 80 SS=3V SS= 1000 SS= Note3 , Note3 Hiccup SS Note3 Note3 PD-60353 IR3800AMPbF TYP MAX Units 300 330 kHz 1. -0.1 -0 μ μmho 1300 1600 μ 0. μ ...
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... PD-60353 IR3800AMPbF 125 C) Ic(static 100 120 Tem p[oC] Ic(dynamic) - 100 120 Temp[oC] ISS - 100 120 Tem p[oC] IOCSET - 100 120 Temp[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-60353 IR3800AMPbF prevents oscillation and Vo Time 8 ...
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... Fig. 5: Soft-Start circuit for IR3800A 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-60353 IR3800AMPbF 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 IR3800A current limit is designed primarily as disaster preventing, and doesn't operate as a precision current regulator. PD-60353 IR3800AMPbF 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 Fig. 11: Charge pump circuit to generate and R see 8 9 PD-60353 IR3800AMPbF μ ≅ --( ) start is the desired start-up time (ms) (C1) is ...
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... 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-60353 IR3800AMPbF , 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-60353 IR3800AMPbF (12) π ∗ 2 ESR Comp E POLE R 3 ...
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... R R Cross over frequency is expressed as ⎤ ⎞ ⎟ ⎟ ⎥ ⎠ ⎦ PD-60353 IR3800AMPbF OUT E Comp 9 V REF Frequency (current source) ...
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... Select : π ref * ref PD-60353 IR3800AMPbF ( ) 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-60353 IR3800AMPbF bypass components such as including feedback 16 ...
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... Typical Application for IR3800A Fig.16: Typical Application circuit for 12V to 1.8V at 14A using ceramic output capacitors 11/04/08 12V to 1.8V @ 14A PD-60353 IR3800AMPbF 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-60353 IR3800AMPbF 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-60353 IR3800AMPbF 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-60353 IR3800AMPbF 20 ...
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... IR WORLD HEADQUARTERS: This product has been designed and qualified for the Consumer market. 11/04/08 IR3800AMPbF 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-60353 TAC Fax: (310) 252-7903 ...