Product Descriptions
The ISL6522B provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522B
integrates all of the control, output adjustment, monitoring and protection functions into a single package.
The output voltage of the converter can be precisely regulated to as low as 0.8V, with a maximum tolerance of ?1 PERCENT over temperature and line voltage variations.
The ISL6522B provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a
15MHz gain-bandwidth product and 6V/μs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0-100 PERCENT.
The ISL6522B protects against overcurrent conditions by inhibiting PWM operation. The ISL6522B monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.
Product Features
? Drives two N-Channel MOSFETs
? Operates from +5V or +12V input
? Simple single-loop control design
- Voltage-mode PWM control
? Fast transient response
- High-bandwidth error amplifier
- Full 0–100 PERCENT duty ratio
? Excellent output voltage regulation
- 0.8V internal reference
- ?1 PERCENT over line voltage and temperature
? Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs rDS(ON)
? Converter can source and sink current
? Pre-Biased Load Start Up
? Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from 50kHz to over 1MHz
? 14-lead SOIC package and 16-lead 5x5mm QFN Package
? QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline
- Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
? Pb-Free Available (RoHS Compliant)
Product Applications
? Power supply for Pentium?, Pentium Pro, PowerPC? and AlphaPC? microprocessors
? FPGA Core DC/DC Converters
? Low-voltage distributed power supplies
Specifications
| Attribute | Attribute value |
| ANSM-Part# | ANSM-ISL6522BIRZ |
| Category | Integrated Circuits (ICs) |
| Power Management (PMIC) | |
| DC DC Switching Controllers | |
| Mfr | Renesas Electronics Corporation |
| Series | - |
| Package | Tray |
| Product Status | Active |
| Output Type | Transistor Driver |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 10.8V ~ 13.2V |
| Frequency - Switching | 200kHz |
| Duty Cycle (Max) | 1 |
| Synchronous Rectifier | Yes |
| Clock Sync | No |
| Serial Interfaces | - |
| Control Features | Enable, Frequency Control, Phase Control, Soft Start |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 16-VQFN Exposed Pad |
| Supplier Device Package | 16-QFN (5x5) |
| Base Product Number | ISL6522 |
Actual product photos

Product Data Book:



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