ISL6523A Intersil Corporation, ISL6523A Datasheet
ISL6523A
Related parts for ISL6523A
ISL6523A Summary of contents
Page 1
... TM Data Sheet VRM8.5 Dual PWM and Dual Linear Power System Controller The ISL6523A provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates two PWM controllers and two linear controllers, as well as the monitoring and protection functions into a 28-pin SOIC package ...
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VSEN3 VAUX 1.5V EA3 - DRIVE3 + x0.75 x0.75 + DRIVE4 - EA4 + VSEN4 1.8V - VCC DRIVE2 UGATE2 + - PHASE2 INHIBIT PWM GATE COMP2 CONTROL - + PWM2 VSEN2 - + EA2 UV2 - + x0.90 + ...
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... LINEAR CONTROLLER CONTROLLER FIGURE 2. SIMPLIFIED POWER SYSTEM DIAGRAM VCC OCSET2 OCSET1 PGOOD UGATE2 PHASE2 UGATE1 PHASE1 LGATE1 VSEN2 PGND VSEN1 VTTPG FB1 ISL6523A VAUX COMP1 DRIVE3 VSEN3 VID3 VID2 VID1 VID0 DRIVE4 VID25 VSEN4 SS13 SS24 C SS24 GND FIGURE 3. TYPICAL APPLICATION ...
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... SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER DC Gain Gain-Bandwidth Product Slew Rate PWM CONTROLLERS GATE DRIVERS UGATE1,2 Source UGATE1,2 Sink 4 ISL6523A Thermal Information Thermal Resistance (Typical, Note 1) SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 0.3V Maximum Junction Temperature (Plastic Package 150 CC Maximum Storage Temperature Range . . . . . . . . . . -65 Maximum Lead Temperature (Soldering 10s .300 ...
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... MOSFETs controlled by the IC. The voltage at this pin is monitored for Power-On Reset (POR) purposes. GND (Pin 17) Signal ground for the IC. All voltage levels are measured with respect to this pin. 5 ISL6523A SYMBOL TEST CONDITIONS I VCC = 12V LGATE ...
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... Connect this pin to the output of the linear 1.8V regulator. This pin is monitored for undervoltage events. Description Operation The ISL6523A monitors and precisely controls 4 output voltage levels (Refer to Figures designed for microprocessor computer applications with 3.3V, 5V, and 12V bias input from an ATX power supply. The IC has 2 PWM and two linear controllers ...
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... VTTPG pin to go high. The oscillator’s triangular wave form is compared to the clamped error amplifier output voltage. 7 ISL6523A As the SS13 pin voltage increases, the pulse-width on the PHASE1 pin increases, bringing the OUT1 output within regulation limits. Similarly, the SS13 voltage clamps the reference voltage for OUT3, enabling a controlled output voltage ramp-up ...
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... VSEN pins for under-voltage. Should excessive currents cause VSEN3 or VSEN4 to fall below the linear under-voltage threshold, the respective UV signals set the 8 ISL6523A OC latch or the FAULT latch, providing respective C capacitors are fully charged. Blanking the UV signals during the C charge interval allows the linear outputs to build above SS the under-voltage threshold during normal operation ...
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... ISL6523A TABLE 1. OUT1 OUTPUT VOLTAGE PROGRAM (Continued +5V IN VID3 OCSET SET PHASE – V PHASE ...
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... There are two sets of critical components in a DC-DC converter using an ISL6523A controller. The switching power components are the most critical because they switch large amounts of energy, and as such, they tend to generate equally large amounts of noise ...
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... The compensation network consists of the error amplifier (internal to the ISL6523A) and the impedance networks Z and Z . The goal of the compensation network is to provide a FB closed loop transfer function with high 0dB crossing frequency (f ) and adequate phase margin. Phase margin is the ...
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... Given a sufficiently fast control loop design, the ISL6523A will provide either 0% or 100% duty cycle in response to a load transient. The response time is the time interval required to slew the inductor current from an initial current value to the post-transient current level ...
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... MOSFET’s body diode or the output capacitances associated with either MOSFET. The gate charge losses are dissipated by the controller IC (ISL6523A) and do not contribute to the MOSFETs’ heat rise. Ensure that both MOSFETs are within their maximum junction temperature at high ambient temperature by calculating the temperature rise according to package thermal resistance specifications ...
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... SCH V IN Linear Controllers Transistor Selection The ISL6523A linear controllers are compatible with both NPN bipolar as well as N-channel MOSFET transistors. The main criteria for selection of pass transistors for the linear 14 ISL6523A regulators is package selection for efficient removal of heat. The power dissipated in a linear regulator is ...
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... ISL6523A DC-DC Converter Application Circuit Figure 13 shows an application circuit of a power supply for a microprocessor computer system. The power supply provides the microprocessor core voltage (V bus voltage (V ), the GTL bus voltage (V OUT2 +5V +12V +3.3V GND GND GND R2 2.2k Q3 HUF76121 L2 V (VTT) OUT2 2.0 H +1. CR1 ...
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... Irvine Center Drive 2401 Palm Bay Rd. Suite 100 Palm Bay, FL 32905 Irvine, CA 92618 TEL: (321) 724-7000 TEL: (949) 341-7000 FAX: (321) 724-7946 FAX: (949) 341-7123 16 ISL6523A M28.3 (JEDEC MS-013-AE ISSUE C) 28 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE SYMBOL A A1 ...