ISL6520 Intersil Corporation, ISL6520 Datasheet
ISL6520
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ISL6520 Summary of contents
Page 1
... The ISL6520 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 ISL6520 integrates the control, output adjustment, monitoring and protection functions into a single 8-pin package. The ISL6520 provides simple, single feedback loop, voltage- mode control with fast transient response ...
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... COMP/SD FB VCC POR AND + SOFTSTART - OC COMPARATOR PWM ERROR COMPARATOR AMP + - + - OSCILLATOR FIXED 300kHz DCPL BULK VCC BOOT 5 1 ISL6520 UGATE 2 7 PHASE LGATE GND QFN TOP VIEW BOOT UGATE 2 11 COMP/OCSET GND GND ...
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... ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2 Recommended Operating Conditions Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V ±10% Ambient Temperature Range - ISL6520C . . . . . . . . . . . 0 Ambient Temperature Range - ISL6520I . . . . . . . . . . -40 Junction Temperature Range . . . . . . . . . . . . . . . . . -40 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied ...
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... Functional Pin Description VCC This is the main bias supply for the ISL6520, as well as the lower MOSFET’s gate. Connect a well-decoupled 5V supply to this pin. FB This pin is the inverting input of the internal error amplifier. Use this pin, in combination with the COMP/OCSET pin, to compensate the voltage-control feedback loop of the converter. ...
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... ISL6520 FIGURE 3. PRINTED CIRCUIT BOARD POWER AND . Once the over- Figure 3 shows the critical power components of the converter. To minimize the voltage overshoot, the interconnecting wires indicated by heavy lines should be part of a ground or power plane in a printed circuit board. The components shown in Figure 3 should be located as close together as possible ...
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... Q 1 for the MOSFETs’ gate and source connections from the ISL6520 must be sized to handle peak current. Figure 4 shows the circuit traces that require additional layout consideration. Use single point and ground plane construction for the circuits shown. Minimize any leakage current paths on ...
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... Given a sufficiently fast control loop design, the ISL6520 will provide either 0% or 100% duty cycle in response to a load transient. The response time is the time required to slew the inductor current from an initial current value to the transient current level ...
Page 8
... MOSFET’s body diode. The gate-charge losses are dissipated by the ISL6520 and don't heat the MOSFETs. However, large gate-charge increases the switching interval, t which increases the upper MOSFET SW switching losses ...
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... ISL6520 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- +5V 6.19kΩ COMP/OCSET 10.0kΩ 470pF 8200pF FB 1.00kΩ Component Selection Notes: - Each 330mF 6.3WVDC, Sanyo 6TPB330M or Equivalent Each 330mF 6.3WVDC, Sanyo 6TPB330M or Equivalent. ...
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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. 10 ISL6520 M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE M ...
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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 11 ISL6520 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) ...