ISL6529 Intersil Corporation, ISL6529 Datasheet
ISL6529
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ISL6529 Summary of contents
Page 1
... Data Sheet Dual Regulator–Synchronous Rectified Buck PWM and Linear Power Controller The ISL6529 provides the power control and protection for two output voltages in high-performance graphics cards and other embedded processor applications. The dual-output controller drives two N-Channel MOSFETs in a synchronous rectified buck converter topology and one N-Channel MOSFET in a linear configuration ...
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Block Diagram VOLTAGE REFERENCE FB2 12VCC DRIVE2 EA2 INHIBIT SOFT-START GND 5VCC SHUTDOWN RESTART SOFT- START AND FAULT LOGIC INHIBIT SOFT-START +5VCC EA1 COMP1 OSCILLATOR UV1 UV2 FB COMP POWER-ON RESET (POR) 12VCC +5V UGATE GATE LOGIC PWM LGATE PGND ...
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... Simplified Power System Diagram +V IN +12V +5V V OUT2 + Typical Application +V IN (+5V or +3.3V OUT2 2. OUT2 3 ISL6529 LINEAR Q3 CONTROLLER CONTROLLER ISL6529 + 5VCC 12VCC DRIVE2 FB2 ISL6529 PGND GND Q1 V OUT1 PWM + Q2 +12V + C IN UGATE Q1 L OUT PHASE LGATE Q2 FB COMP V OUT1 1. OUT1 ...
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... PWM CONTROLLER GATE DRIVERS UGATE and LGATE Maximum Voltage UGATE and LGATE Minimum Voltage UGATE and LGATE Source Current 4 ISL6529 Thermal Information Thermal Resistance SOIC Package (Note MLFP Package (Note 2 ...
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... The voltage at this pin is monitored for Power-On Reset (POR) purposes. DRIVE2(Pin 5), (Pin 4 MLFP) Connect this pin to the gate terminal of an external N-Channel MOSFET transistor. This pin provides the gate voltage for the linear regulator pass transistor. It also 5 ISL6529 SYMBOL TEST CONDITIONS I 12VCC = 12V GATE R ...
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... Figure 1 shows the soft-start sequence of an ISL6529 evaluation board powered by an ATX supply. Note the uniform linear output voltage rise of the two ISL6529 output voltages. Once the voltage on 5VCC crosses the POR thresholds, both outputs begin their soft-start sequence. The triangle waveform from the PWM oscillator is compared to the rising error amplifier output voltage ...
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... FIGURE 5. OUTPUT VOLTAGE SELECTION OF THE LINEAR +12V 12VCC +3.3V UGATE Q1 L OUT ISL6529 + LGATE COMP × 0.8V – 0. 5kΩ. This FB × R6 < 5kΩ DRIVE2 R12 C4 FB2 ISL6529 R5 R6 R5 × ------- - R6 +5V 5VCC (EQ. 1) (EQ. 2) ...
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... PHASE ESR (PARASITIC E/A V REF ERROR AMP DETAILED COMPENSATION COMPONENTS COMP ISL6529 0.8V COMPENSATION DESIGN 1 × × × ESR C O and Z . They provide the IN FB OUT 0dB V OUT + OUT (EQ. 5) (EQ ...
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... There are two sets of critical components in a DC-DC converter using the ISL6529. The switching components are the most critical because they switch large amounts of energy, and therefore tend to generate large amounts of noise. Next are the small signal components which connect to sensitive nodes or supply critical bypass current and signal coupling ...
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... The wiring traces from the UGATE pin to the MOSFET gate should be kept short and wide enough to easily handle the 1A of drive current. The switching components should be placed close to the ISL6529 first. Minimize the length of the connections between the input capacitors and the power switches IN by placing them nearby ...
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... P ConductionLower These equations assume linear voltage-current transitions and are approximations. The gate-charge losses are dissipated by the ISL6529 and do not heat the MOSFET. However, large gate-charge increases the switching interval which increases the upper MOSFET switching losses. SW Ensure that the MOSFET is within its maximum junction ...
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... However, if logic-level transistors or transistors with low V are used, close attention to layout guidelines should GS(on) be exercised, as the low gate threshold could lead to some shoot-through despite counteracting circuitry present aboard the ISL6529. ISL6529 Converter Application Circuit +3.3V C7 1000µF R13 Q3 1.0kΩ VOUT2 (1A) R5 4.64kΩ ...
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... Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP) 13 ISL6529 L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHB ISSUE C) MILLIMETERS SYMBOL MIN NOMINAL A 0. 0.28 D 5.00 BSC D1 D2 2.95 E 5.00 BSC E1 4.75 BSC E2 2. 0. θ - NOTES: 1 ...
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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 ISL6529 M14.15 (JEDEC MS-012-AB ISSUE C) 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC ...