ISL6522EVAL1

Manufacturer Part NumberISL6522EVAL1
DescriptionEVALUATION BOARD ISL6522
ManufacturerIntersil
ISL6522EVAL1 datasheet
 


Specifications of ISL6522EVAL1

Main PurposeDC/DC, Step DownVoltage - Input10.8 ~ 13.2V
Regulator TopologyBuckBoard TypeFully Populated
Utilized Ic / PartISL6522Lead Free Status / RoHS StatusContains lead / RoHS non-compliant
Current - Output-Voltage - Output-
Power - Output-Frequency - Switching-
Outputs And Type-  
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®
Data Sheet
Buck and Synchronous Rectifier
Pulse-Width Modulator (PWM) Controller
The ISL6522 provides complete control and protection for a
DC-DC converter optimized for high-performance micro-
processor applications. It is designed to drive two N-Channel
MOSFETs in a synchronous rectified buck topology. The
ISL6522 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% over temperature and line voltage variations.
The ISL6522 provides simple, single feedback loop, voltage-
mode 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%.
The ISL6522 protects against overcurrent conditions by
inhibiting PWM operation. The ISL6522 monitors the current
by using the r
of the upper MOSFET which eliminates
DS(ON)
the need for a current sensing resistor.
Pinouts
SOIC, TSSOP
TOP VIEW
14
RT
1
13
OCSET
2
SS
12
3
COMP
11
4
FB
10
5
9
EN
6
8
GND
7
QFN
TOP VIEW
16
15
14
13
SS
1
COMP
2
GND
FB
3
EN
4
5
6
7
8
1
®
PowerPC
is a trademark of IBM. AlphaPC™ is a trademark of Digital Equipment Corporation. Pentium
March 10, 2006
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% duty ratio
• Excellent output voltage regulation
- 0.8V internal reference
- ±1% over line voltage and temperature
• Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs r
• Converter can source and sink current
• Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from
50kHz to over 1MHz
• 14-lead SOIC and TSSOP package and 16-lead 5x5mm
QFN Package
• QFN Package
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
No Leads-Product Outline.
VCC
- Near Chip-Scale Package Footprint; Improves PCB
PVCC
Efficiency and Thinner in Profile
LGATE
• Pb-free plus anneal available (RoHS compliant)
PGND
Applications
BOOT
UGATE
• Power supply for Pentium
PHASE
AlphaPC™ microprocessors
• High-power 5V to 3.xV DC-DC regulators
• Low-voltage distributed power supplies
12
PVCC
LGATE
11
10
PGND
9
BOOT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Copyright © Intersil Americas Inc. 2001, 2002, 2004-2006. All Rights Reserved
ISL6522
FN9030.8
DS(ON)
®
®
, Pentium Pro, PowerPC
and
|
Intersil (and design) is a trademark of Intersil Americas Inc.
®
is a registered trademark of Intel Corporation.

ISL6522EVAL1 Summary of contents

  • Page 1

    ... PVCC LGATE 11 10 PGND 9 BOOT CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Copyright © Intersil Americas Inc. 2001, 2002, 2004-2006. All Rights Reserved ISL6522 FN9030.8 DS(ON) ® ® , Pentium Pro, PowerPC and | Intersil (and design trademark of Intersil Americas Inc. ...

  • Page 2

    ... RoHS compliant and compatible 14 Ld TSSOP M14.173 with both SnPb and Pb-free soldering operations. Intersil Pb-free 14 Ld TSSOP M14.173 products are MSL classified at Pb-free peak reflow temperatures that (Pb-free) meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020 ...

  • Page 3

    Block Diagram OCSET REFERENCE FB COMP RT 3 ISL6522 POWER-ON RESET (POR OVER CURRENT 4V 200µA PWM 0.8V COMPARATOR REF + + - - ERROR AMP OSCILLATOR VCC EN 10µA SOFT- SS START BOOT UGATE PHASE GATE INHIBIT ...

  • Page 4

    Absolute Maximum Ratings Supply Voltage +15.0V CC Boot ...

  • Page 5

    Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued) PARAMETER Upper Gate Sink Lower Gate Source Lower Gate Sink PROTECTION OCSET Current Source Soft-Start Current Typical Performance Curves R PULLUP T TO +12V 1000 100 R PULLDOWN ...

  • Page 6

    OCSET Connect a resistor (R ) from this pin to the drain of the OCSET upper MOSFET internal 200µA current source OCSET (I ), and the upper MOSFET on-resistance (r OCS the converter overcurrent (OC) trip point ...

  • Page 7

    VOLTAGE V OSC(MIN) CLAMP ON V STEADY STATE ⋅ ----------- OSC MIN OUT SS SteadyState ⋅ ------------------------------------------------ ∆V ----------- = – = ...

  • Page 8

    ISL6522 may be exceeded and the IC will experience a catastrophic failure and the converter will no longer be operational. Ensuring that there is a path for the current to follow other than the capacitance ...

  • Page 9

    V OSC DRIVER PWM COMPARATOR - DRIVER + ∆V OSC E REFERENCE ERROR AMP DETAILED COMPENSATION COMPONENTS COMP ISL6522 REF FIGURE 7. VOLTAGE - MODE ...

  • Page 10

    ESR (effective series resistance) and voltage rating requirements rather than actual capacitance requirements. High frequency decoupling capacitors should be placed as close to the power pins of the load as physically possible. Be careful not to add inductance in ...

  • Page 11

    Losses while Sourcing Current 1 2 × × ⋅ × UPPER DS ...

  • Page 12

    ... Q1 Fairchild MOSFET; RFP25N05 12 ISL6522 implemented using the ISL6522 controller without any modifications. Detailed information on the circuit, including a complete bill of materials and circuit board description, can be found in Application Note AN9722. See Intersil’s home page on the web: http://www.intersil.com. C12 C19 1µF VCC ...

  • Page 13

    Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the ...

  • Page 14

    Thin Shrink Small Outline Plastic Packages (TSSOP) N INDEX 0.25(0.010) E AREA E1 - 0.05(0.002) SEATING PLANE - -C- α 0.10(0.004) 0.10(0.004 NOTES: 1. These package ...

  • Page 15

    ... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. 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 ...