ISL6522BIBZ Intersil, ISL6522BIBZ Datasheet

IC PWM BUCK BST VM 14SOIC

ISL6522BIBZ

Manufacturer Part Number
ISL6522BIBZ
Description
IC PWM BUCK BST VM 14SOIC
Manufacturer
Intersil
Datasheet

Specifications of ISL6522BIBZ

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
1MHz
Duty Cycle
100%
Voltage - Supply
10.8 V ~ 13.2 V
Buck
Yes
Boost
Yes
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
-40°C ~ 85°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
1MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6522BIBZ-T
Manufacturer:
INTERSIL
Quantity:
9 100
Buck and Synchronous Rectifier
Pulse-Width Modulator (PWM) Controller
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% over temperature and line voltage variations.
The ISL6522B 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 perform-
ance. The resulting PWM duty ratio ranges from 0-100%.
The ISL6522B protects against overcurrent conditions by
inhibiting PWM operation. The ISL6522B monitors the
current by using the r
eliminates the need for a current sensing resistor.
Pinouts
COMP
OCSET
EN
SS
FB
COMP
GND
RT
SS
FB
EN
1
2
3
4
DS(ON)
16
1
2
3
4
5
6
7
ISL6522B (SOIC)
5
ISL6522B (QFN)
PowerPC
TOP VIEW
TOP VIEW
15
6
®
of the upper MOSFET which
1
Copyright © Intersil Americas Inc. 2004, 2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
14
7
®
is a trademark of IBM. AlphaPC™ is a trademark of Digital Equipment Corporation. Pentium
13
8
Data Sheet
14
13
12
11
10
9
8
12
11
10
9
VCC
PVCC
LGATE
PGND
BOOT
UGATE
PHASE
PVCC
LGATE
PGND
BOOT
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Drives two N-Channel MOSFETs
• Operates from +5V or +12V input
• Simple single-loop control design
• Fast transient response
• Excellent output voltage regulation
• Overcurrent fault monitor
• Converter can source and sink current
• Pre-Biased Load Start Up
• Small converter size
• 14-lead SOIC package and 16-lead 5x5mm QFN Package
• QFN Package
• Pb-Free Available (RoHS Compliant)
Applications
• Power supply for Pentium
• FPGA Core DC/DC Converters
• Low-voltage distributed power supplies
- Voltage-mode PWM control
- High-bandwidth error amplifier
- Full 0–100% duty ratio
- 0.8V internal reference
- ±1% over line voltage and temperature
- Does not require extra current sensing element
- Uses MOSFETs r
- Constant frequency operation
- 200kHz free-running oscillator programmable from
- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
- Near Chip-Scale Package Footprint; Improves PCB
AlphaPC™ microprocessors
50kHz to over 1MHz
No Leads-Product Outline
Efficiency and Thinner in Profile
April 4, 2005
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
DS(ON)
®
®
is a registered trademark of Intel Corporation.
, Pentium Pro, PowerPC
ISL6522B
FN9150.1
®
and

Related parts for ISL6522BIBZ

ISL6522BIBZ Summary of contents

Page 1

... Copyright © Intersil Americas Inc. 2004, 2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ® PowerPC is a trademark of IBM. AlphaPC™ trademark of Digital Equipment Corporation. Pentium Features • Drives two N-Channel MOSFETs • Operates from +5V or +12V input • ...

Page 2

... Ld SOIC (See Note) (Pb-free) ISL6522BCR 5x5 QFN ISL6522BCRZ 5x5 QFN (See Note) (Pb-free) ISL6522BIB* - SOIC ISL6522BIBZ* - SOIC (See Note) (Pb-free) ISL6522BIR* - 5x5 QFN ISL6522BIRZ* - 5x5 QFN (See Note) (Pb-free) *Add “-T” suffix for tape and reel. NOTE: Intersil Pb-free products employ special Pb-free material sets ...

Page 3

Typical Application SS RT REF FB Block Diagram OCSET REFERENCE FB COMP RT 3 ISL6522B 12V V CC OCSET MONITOR AND EN PROTECTION BOOT ISL6522B OSC UGATE PHASE +12V PV CC LGATE - + + PGND - COMP GND RESET ...

Page 4

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

Page 5

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued) PARAMETER Soft START Soft-Start Current Peak Soft Start Voltage GATE DRIVERS Upper Gate Source Upper Gate Sink Lower Gate Source Lower Gate Sink PROTECTION OCSET Current Source Typical Performance Curves R ...

Page 6

Functional Pin Descriptions ISL6522B (SOIC) TOP VIEW OCSET COMP GND 7 ISL6522B (QFN) TOP VIEW COMP ...

Page 7

Functional Description Initialization The ISL6522B automatically initializes upon receipt of power. Special sequencing of the input supplies is not necessary. The Power-On Reset (POR) function continually monitors the input supply voltages and the enable (EN) pin. The POR monitors the ...

Page 8

Overcurrent Protection The overcurrent function protects the converter from a shorted output by using the upper MOSFETs on-resistance monitor the current. This method enhances the DS(ON) converter’s efficiency and reduces cost by eliminating a current sensing resistor. The ...

Page 9

Figure 6 shows the circuit traces that require additional layout consideration. Use single point and ground plane construction for the circuits shown. Minimize any leakage current paths on the SS PIN and locate the capacitor, C close to the SS ...

Page 10

ND 3. Place 2 Zero at Filter’s Double Pole ST 4. Place 1 Pole at the ESR Zero ND 5. Place 2 Pole at Half the Switching Frequency 6. Check Gain against Error Amplifier’s Open-Loop Gain 7. Estimate Phase Margin ...

Page 11

The response time to a transient is different for the application of load and the removal of load. The following equations give the approximate response time interval for application and removal of a transient load: × × ...

Page 12

D BOOT +12V +5V OR +12V - + V D VCC BOOT ISL6522B C BOOT Q1 UGATE PHASE +5V OR +12V PVCC Q2 LGATE - + PGND GND FIGURE 9. UPPER GATE DRIVE - BOOTSTRAP OPTION Figure 10 shows the ...

Page 13

... CR2 - 3A, 40V Schottky, Motorola MBR340 or equivalent. Q1 Fairchild MOSFET; RFP25N05 13 ISL6522B 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 14

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

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 ...

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