ISL6526 Intersil Corporation, ISL6526 Datasheet
ISL6526
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ISL6526 Summary of contents
Page 1
... Data Sheet Single Synchronous Buck Pulse-Width Modulation (PWM) Controller The ISL6526 makes simple work out of implementing a complete control and protection scheme for a DC-DC stepdown converter. Designed to drive N-Channel MOSFETs in a synchronous buck topology, the ISL6526 integrates the control, output adjustment, monitoring and protection functions into a single package ...
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... PUMP DISABLE 2 ISL6526 UGATE 14 BOOT 13 PHASE 12 VCC 11 10 CPGND 9 ENABLE 8 COMP VCC OCSET CT1 CPVOUT ISL6526 D BOOT CT2 BOOT CPGND C BOOT UGATE GND PHASE ENABLE LGATE COMP OFFSET 16 LEAD 5X5 (QFN) TOP VIEW ...
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... Typical Application - 5V Input + N/C DISABLE Block Diagram VCC CT1 CHARGE PUMP CT2 CPGND OCSET 20µ COMP 3 ISL6526 VCC OCSET CT1 CPVOUT ISL6526 D BOOT CT2 BOOT CPGND C BOOT UGATE GND PHASE ENABLE LGATE COMP OFFSET CPVOUT POWER-ON RESET (POR) ...
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... For Recommended soldering conditions see Tech Brief TB389 125 C SYMBOL TEST CONDITIONS I BIAS POR Commercial Industrial ISL6526C, Commercial OSC IC = ISL6526I, Industrial IC = ISL6526AC, Commercial IC = ISL6526AI, Industrial ∆V OSC V REF 3.3V, No Load CPVOUT VCC Guaranteed by Design GBWP SR Commercial Industrial o o θ θ ( C/W) ...
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... VCC This pin provides the bias supply for the ISL6526. Connect a well-decoupled 3.3V supply to this pin. COMP and FB COMP and FB are the available external pins of the error amplifier. The FB pin is the inverting input of the internal error amplifier and the COMP pin is the error amplifier output ...
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... MOSFETs are not ON simultaneously. The adaptive shoot-through protection utilized by the ISL6526 looks at the lower gate drive pin, LGATE, and the upper gate drive pin, UGATE, to determine whether a MOSFET OFF. If the voltage from UGATE or from LGATE to GND is less than 0 ...
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... The ISL6526 incorporates a MOSFET shoot-through protection method which allows a converter to sink current as well as source current. Care should be exercised when designing a converter with the ISL6526 when it is known that the converter may sink current. When the converter is sinking current behaving as a boost converter that is regulating its input voltage. This V (2 ...
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... ISL6526 FIGURE 4. PRINTED CIRCUIT BOARD POWER PLANES The switching components should be placed close to the ISL6526 first. Minimize the length of the connections between the input capacitors, C them nearby. Position both the ceramic and bulk input capacitors as close to the upper MOSFET drain as possible. ...
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... The compensation network consists of the error amplifier (internal to the ISL6526) and the impedance networks Z and Z . The goal of the compensation network is to provide FB a closed loop transfer function with the highest 0dB crossing frequency (f ) and adequate phase margin. Phase margin ...
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... Component Selection Guidelines Charge Pump Capacitor Selection A capacitor across pins CT1 and CT2 is required to create the proper bias voltage for the ISL6526 when operating the IC from 3.3V. Selecting the proper capacitance value is important so that the bias current draw and the current required by the MOSFET gates do not overburden the capacitor ...
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... These equations assume linear voltage-current transitions and do not adequately model power loss due the reverse-recovery of the upper and lower MOSFET’s body diode. The gate-charge losses are dissipated by the ISL6526 and don't heat the MOSFETs. However, large gate-charge increases the switching interval, t ...
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... MOSFET. Initial calculations with V no less than 4V will quickly help narrow the BOOT2 bootstrap capacitor range. ISL6526 DC-DC Converter Application Circuit Figure 8 shows an application circuit of a DC-DC Converter. Detailed information on the circuit, including a complete Bill- 3.3V GND TP ...
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... The lead width “B”, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 13 ISL6526 M14.15 (JEDEC MS-012-AB ISSUE C) 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC M B ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 14 ISL6526 L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHB ISSUE C) ...