ISL6535 INTERSIL [Intersil Corporation], ISL6535 Datasheet
ISL6535
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ISL6535 Summary of contents
Page 1
... Data Sheet Synchronous Buck Pulse-Width Modulator (PWM) Controller The ISL6535 is a high performance synchronous controller for demanding DC/DC converter applications. It provides overcurrent fault protection and is designed to safely startup into prebiased output loads. The output voltage of the converter can be precisely regulated to as low as 0.597V, with a maximum tolerance of ± ...
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... Block Diagram EN SS 30μA 6μA REFERENCE V = 0.597V REF REFIN (QFN ONLY COMP GND 2 ISL6535 VCC INTERNAL REGULATOR POWER-ON RESET (POR) SOFT-START SOURCE OCP AND FAULT LOGIC PWM OSCILLATOR RT SSDONE (QFN ONLY) OCSET 200μA BOOT UGATE GATE CONTROL PHASE LOGIC ...
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... ONLY ISL6535 ISL6535 BOOT F2 PVCC VCC BOOT R OCSET OCSET C OCSET UGATE PHASE LGATE PGND ISL6535 COMP GND R +1.2V TO +12V OCSET OUT C OUT HFIN C BIN Q1 C BOOT L OUT HFOUT ...
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... V BOOT PHASE Ambient Temperature Range, ISL6535C . . . . . . . . . . . 0°C to +70°C Ambient Temperature Range, ISL6535I .-40°C to +85°C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. ...
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... Typical Performance Curves R PULL- +12V 1000 100 R PULLDOWN RT TO GND 10 10k 100k SWITCHING FREQUENCY (Hz) FIGURE 1. R RESISTANCE vs FREQUENCY RT 5 ISL6535 SYMBOL TEST CONDITIONS 0°C to +70° -40°C to +85° 0°C to +70° -40°C to +85° ...
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... Soft-start During soft-start, an internal 30µA current source charges the external capacitor (C ISL6535 is utilizing the internal reference, then as the SS pin’s voltage ramps from 1V to 3V, the soft-start function scales the reference input (positive terminal of error amp) from GND to VREF (0.597V nominal). If the ISL6535 is utilizing an ...
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... SSDONE Soft-start done is only available in the 16 Ld QFN packaging option of the ISL6535. When the soft-start pin reaches 4V, an open drain signal is provided to support sequencing requirements. SSDONE is deasserted by disabling of the part, including pulling SS low, and by POR and OCP events. ...
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... See the ISL6612 datasheet FN9153 for specification parameters that are not defined in the current ISL6535 “Electrical Specifications” table on page 4. Reference Input The REFIN pin allows the user to bypass the internal 0.597V reference with an external reference. If REFIN is NOT above ~2 ...
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... Locate the ISL6535 within inches of the MOSFETs, Q and Q (1 inch or less for 500kHz or higher operation). The 2 circuit traces for the MOSFETs’ gate and source connections from the ISL6535 must be sized to handle peak current. Minimize any leakage current paths on the SS pin ...
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... Figure 8 by adding the modulator gain, G (in dB), to the feedback MOD compensation gain, G (in dB). This is equivalent ISL6535 multiplying the modulator transfer function and the (EQ. 10) compensation transfer function and then plotting the resulting gain (EQ. 11) ...
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... Given a sufficiently fast control loop design, the ISL6535 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 ...
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... MOSFET power, package type, ambient temperature and air flow. Standard-gate MOSFETs are normally recommended for use with the ISL6535. However, logic-level gate MOSFETs can be used under special circumstances. The input voltage, upper gate drive level, and the MOSFETs absolute gate-to- source voltage rating determine whether logic-level MOSFETs are appropriate ...
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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 ISL6535 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 ISL6535 L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220-VGGC ISSUE C) ...