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| PWM Buck DC/DC and Triple Linear Power Controller |
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Available in RoHS/Pb-Free
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 Buy direct from Intersil
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 Check distributor inventory
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 Request samples
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL6521CB |
Active |
Comm |
16 Ld SOIC |
1 |
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| ISL6521CB-T |
Active |
Comm |
16 Ld SOIC T+R |
1 |
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| ISL6521CBZ |
Active |
Comm |
16 Ld SOIC |
3 |
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| ISL6521CBZ-T |
Active |
Comm |
16 Ld SOIC T+R |
3 |
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| ISL6521CBZA |
Active |
Comm |
16 Ld SOIC |
3 |
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| ISL6521CBZA-T |
Active |
Comm |
16 Ld SOIC T+R |
3 |
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| ISL6521EVAL1Z |
Active |
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Eval Board |
N/A |
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| ISL6521IBZ |
Active |
Ind |
16 Ld SOIC |
3 |
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| ISL6521IBZ-T |
Active |
Ind |
16 Ld SOIC T+R |
3 |
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| ISL6521EVAL1 |
InActive |
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Eval Board |
N/A |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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The ISL6521 provides the power control and protection for four output voltages in low-voltage, high-performance applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16-lead SOIC package. The PWM controller is intended to regulate the low voltage supply that requires the greatest amount of current (usually the core voltage for the FPGA, ASIC, or processor) with a synchronous rectified buck converter. The linears are intended to regulate other system voltages, such as I/O (input/output) and memory circuits. Both the switching regulator and linear voltage reference provide ±2% of static regulation over line, load, and temperature ranges. All outputs are user-adjustable by means of an external resistor divider. All linear controllers can supply up to 120mA with no external pass devices. Employing bipolar NPNs for the pass transistors, the linear regulators can achieve output currents of 3A or higher with proper device selection.
The ISL6521 monitors all the output voltages. The PWM controller’s adjustable overcurrent function monitors the output current by using the voltage drop across the upper MOSFET’s rDS(ON). The linear regulator outputs are monitored via the FB pins for undervoltage events. |
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 Key Features |
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Provides 4 Regulated Voltages-Switching Regulator 20A Capable-Three Linear Regulators - Capable of 120mA - Capable of up to 3A with an External Transistor
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Externally Resistor-Adjustable Outputs
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Simple Single-Loop Control Design-Voltage-Mode PWM Control
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Fast PWM Converter Transient Response-High-Bandwidth Error Amplifier-Full 0% to 100% Duty Ratio
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Excellent Output Voltage Regulation-All Outputs: ±2% Over Temperature
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Overcurrent Fault Monitors-Switching Regulator Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)
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Small Converter Size-300kHz Constant Frequency Operation-Small External Component Count
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Commercial and Industrial Temperature Range Support
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Pb-free Available (RoHS Compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Evaluation Board(s): |
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 Technical Homepage: |
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 i-Sim: |
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 Parametric Data |
| | VIN (min) (V) | | 5 | | | VIN (max) (V) | | 5 | | | VOUT1 (min) (V) | | .8 | | | VOUT1 (max) (V) | | 4.5 | | | VOUT2 (V) | | Adj. | | | VOUT3 (V) | | Adj. | | | VOUT4 (V) | | Adj. | | | IOUT1 (A) | | 20 | |
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 Application Block Diagrams |
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| Applications |
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- FPGA and PowerPC™-based boards
- General purpose, low voltage power supplies
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| | HIP6019B | | Advanced Dual PWM and Dual Linear Power Control | | | | HIP6021 | | Advanced PWM and Triple Linear Power Controller | | | | HIP6521 | | PWM and Triple Linear Power Controller | | | | ISL6232 | | High Efficiency System Power Supply Controller for Notebook Computers | | | | ISL6236 | | High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers | | | | ISL6236A | | High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers | | | | ISL62381 | | High-Efficiency, Quad-Output System Power Supply Controller for Notebook Computers | | | | ISL62382 | | High-Efficiency, Quad-Output System Power Supply Controller for Notebook Computers | | | | ISL62383 | | High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers | | | | ISL6406 | | Single Synchronous Buck Pulse-Width Modulation (PWM) Controller | | | | ISL6440 | | 300kHz Dual, 180° Out-of-Phase, Step-Down PWM Controller | | | | ISL6443 | | 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL6443A | | 300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL6445 | | 1.4MHz Dual, 180° Out-of-Phase, Step-Down PWM Controller | | | | ISL6523 | | VRM8.5 Dual PWM and Dual Linear Power System Controller | | | | ISL6524 | | VRM8.5 PWM and Triple Linear Power System Controller | | | | ISL6524A | | VRM8.5 PWM and Triple Linear Power System Controller | | | | ISL6537 | | ACPI Regulator/Controller for Dual Channel DDR Memory Systems | | | | ISL6548 | | ACPI Regulator/Controller for Dual Channel DDR Memory Systems | | | | ISL9440 | | Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL9440A | | Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | | | | ISL9441 | | Triple, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller | |
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