ISL6535IBZ-T Intersil, ISL6535IBZ-T Datasheet

IC CTRLR PWM SYNC BUCK 14-SOIC

ISL6535IBZ-T

Manufacturer Part Number
ISL6535IBZ-T
Description
IC CTRLR PWM SYNC BUCK 14-SOIC
Manufacturer
Intersil
Datasheet

Specifications of ISL6535IBZ-T

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
1.5MHz
Duty Cycle
100%
Voltage - Supply
10.8 V ~ 13.2 V
Buck
Yes
Boost
No
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
1.5MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ISL6535IBZ-TTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ISL6535IBZ-T
Quantity:
5 400
Synchronous Buck Pulse-Width
Modulator (PWM) Controller
The ISL6535 is a high performance synchronous controller
for demanding DC/DC converter applications. It provides
overcurrent fault protection and is designed to safely startup
into prebiased output loads.
The output voltage of the converter can be precisely
regulated to as low as 0.597V, with a maximum tolerance of
±1% over the commercial temperature range, and ±1.5%
over the industrial temperature range.
The ISL6535 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a triangle-
wave oscillator that is adjustable from below 50kHz to over
1.5MHz. Full (0% to 100%) PWM duty cycle support is
provided.
The error amplifier features a 15MHz gain-bandwidth
product and 6V/µs slew rate which enables high converter
bandwidth for fast transient performance.
The ISL6535's overcurrent protection monitors the current
by using the r
eliminates the need for a current sensing resistor.
Pinouts
COMP
OCSET
COMP
DS(ON)
EN
SS
FB
GND
EN
RT
SS
FB
1
2
3
4
ISL6535 (14 LD SOIC)
1
2
3
4
5
6
7
ISL6535 (16 LD QFN)
of the upper MOSFET, which
16
5
TOP VIEW
TOP VIEW
15
6
®
1
14
7
13
8
Data Sheet
14
13
12
11
10
12
11
10
9
8
9
VCC
PVCC
LGATE
PGND
BOOT
UGATE
PHASE
PVCC
LGATE
PGND
BOOT
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Operates from +12V Input
• Excellent Output Voltage Regulation
• Simple Single-Loop Control Design
• Fast Transient Response
• Small Converter Size
• 12V High Speed MOSFET Gate Drivers
• Overcurrent Fault Monitor
• Converter can Source and Sink Current
• Soft-Start Done and an External Reference Pin for
• Pin Compatible with ISL6522
• Supports Start-Up into Prebiased Loads
• Pb-free available (RoHS compliant)
Applications
• Power Supply for some Pentium®, PowerPC™, as well as
• High-Power 12V Input DC/DC Regulators
• Low-Voltage Distributed Power Supplies
Ordering Information
ISL6535CBZ* 6535CBZ
ISL6535IBZ*
ISL6535CRZ* 65 35CRZ
ISL6535IRZ* 65 35IRZ
*Add “-T” or “-TK” suffix for tape and reel. Please refer to TB347 for
details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
- 0.597V Internal Reference
- ±1% Over the Commercial Temperature Range
- ±1.5% Over the Industrial Temperature Range
- Voltage-Mode PWM Control
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
- Leading and Falling Edge Modulation
- Constant Frequency Operation
- Oscillator Programmable from 50kHz to Over 1.5MHz
- 2.0A Source/3A Sink at 12V Low Side Gate Drive
- 1.25A Source/2A Sink at 12V High Side Gate Drive
- Drives Two N-Channel MOSFETs
- High-Side MOSFET’s r
- Reduced ~120ns Blanking Time
Tracking Applications are Available in the QFN Package
Graphic CPUs
NUMBER
(Note)
PART
All other trademarks mentioned are the property of their respective owners.
|
May 5, 2008
Intersil (and design) is a registered trademark of Intersil Americas Inc.
MARKING
6535IBZ
Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved
PART
-40 to +85 14 Ld SOIC
-40 to +85 16 Ld 4x4 QFN L16.4x4
0 to +70
0 to +70
RANGE
TEMP.
DS(ON)
(°C)
Sensing
14 Ld SOIC
16 Ld 4x4 QFN L16.4x4
PACKAGE
(Pb-free)
ISL6535
FN9255.1
M14.15
M14.15
DWG. #
PKG.

Related parts for ISL6535IBZ-T

ISL6535IBZ-T Summary of contents

Page 1

... High-Power 12V Input DC/DC Regulators • Low-Voltage Distributed Power Supplies 8 PHASE Ordering Information PART NUMBER (Note) ISL6535CBZ* 6535CBZ ISL6535IBZ* ISL6535CRZ* 65 35CRZ PVCC 12 ISL6535IRZ* 65 35IRZ *Add “-T” or “-TK” suffix for tape and reel. Please refer to TB347 for LGATE 11 details on reel specifications. ...

Page 2

Block Diagram EN SS 30μA 6μA REFERENCE V = 0.597V REF REFIN (QFN ONLY COMP GND 2 ISL6535 VCC INTERNAL REGULATOR POWER-ON RESET (POR) SOFT-START SOURCE OCP AND FAULT LOGIC PWM OSCILLATOR RT SSDONE (QFN ONLY) OCSET 200μA ...

Page 3

Simplified Power System Diagram +12V C vcc Typical Application +12V IN R FILTER C F1 SSDONE (QFN ONLY) REFIN (QFN ONLY ISL6535 ISL6535 ...

Page 4

... Thermal Information Thermal Resistance (Typical) SOIC Package (Note QFN Package (Note 2 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +150°C - 16V 0.3V Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C BOOT Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp . . . . . . . . . . . . . . <V PVCC SYMBOL TEST CONDITIONS I SS/ VCC I SS/ ...

Page 5

Electrical Specifications Recommended Operating Conditions, unless otherwise noted specifications in bold are valid for process, temperature, and line operating conditions. (Continued) PARAMETER Soft-start Current REFERENCE Reference Voltage System Accuracy REFIN Current Source (QFN Only) REFIN Threshold (QFN Only) REFIN Offset ...

Page 6

Functional Pin Description (SOIC/QFN) RT (Pin 1/14) This pin provides oscillator switching frequency adjustment. By placing a resistor (R ) from this pin to GND, the RT switching frequency is set from between 200kHz and 1.5MHz according Equation 1: . ...

Page 7

the internal reference is used, then the SS soft-start capacitance value can be calculated through Equation 3: ⋅ 30μ ---------------------------- ...

Page 8

... SW High Speed MOSFET Gate Driver The integrated driver has the same drive capability and feature as the Intersil’s 12V gate driver, ISL6612. The PWM tri-state feature helps prevent a negative transient on the output voltage when the output is being shut down. This eliminates the Schottky diode that is used in some systems for protecting the microprocessor from reversed-output- voltage damage ...

Page 9

Locate the ISL6535 within inches of the MOSFETs, Q and Q (1 inch or less for 500kHz or higher operation). The 2 circuit traces for the MOSFETs’ gate and source connections from the ISL6535 must be sized ...

Page 10

C = ⋅ ⋅ ⋅ 1 2π Calculate C such that F is placed ------------------------------------------------------- - = ⋅ ⋅ ⋅ 2 2π ...

Page 11

An aluminum electrolytic capacitor's ESR value is related to the case size with lower ESR available in larger case sizes. However, the equivalent series inductance (ESL) of these capacitors ...

Page 12

A separate heatsink may be necessary depending upon MOSFET power, package type, ambient temperature and air flow. Standard-gate MOSFETs are normally recommended for use with the ISL6535. However, logic-level ...

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

... 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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