ISL6525CBZ Intersil, ISL6525CBZ Datasheet

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ISL6525CBZ

Manufacturer Part Number
ISL6525CBZ
Description
IC CTRLR PWM SYNC BUCK 14-SOIC
Manufacturer
Intersil
Datasheet

Specifications of ISL6525CBZ

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
215kHz
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
0°C ~ 70°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
215kHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL6525CBZ-T
Manufacturer:
INTERSIL/PBF
Quantity:
6 837
Part Number:
ISL6525CBZ-T
Manufacturer:
INTERSIL
Quantity:
20 000
Buck and Synchronous-Rectifier
Pulse-Width Modulator (PWM) Controller
The ISL6525 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 ISL6525 integrates all of the control, output
adjustment, monitoring and protection functions into a single
package. A programmable delay time for the PGOOD signal
makes it especially suitable for the VTT regulation in VRM8.5
applications.
The output voltage of the converter can be precisely
regulated to as low as 1.20V, with a maximum tolerance of
±1% over temperature and line voltage variations.
The ISL6525 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% to 100%.
The ISL6525 protects against over-current conditions by
inhibiting PWM operation. The ISL6525 monitors the current
by using the r
the need for a current sensing resistor.
Ordering Information
ISL6525CB
ISL6525CBZ
(See Note)
*Add “-T” suffix to part number for tape and reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are 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.
PART NUMBER
DS(ON)
RANGE (
of the upper MOSFET which eliminates
TEMP.
0 to 70
0 to 70
®
o
C)
1
14 Ld SOIC
14 Ld SOIC
(Pb-free)
Data Sheet
PACKAGE
M14.15
M14.15
DWG. #
PKG.
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
• Programmable delay for PGOOD signal
• Over-Current Fault Monitor
• Small Converter Size
• 14 Pin, SOIC Package
• Pb-Free Available (RoHS Compliant)
Applications
• Power Supply for Various Microprocessors
• VTT Regulation for VRM8.5
• High-Power 5V to 3.xV DC-DC Regulators
• Low-Voltage Distributed Power Supplies
Pinout
December 27, 2004
- Voltage-Mode PWM Control
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
- 1.20V 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
50kHz to Over 1MHz
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
PGOOD
OCSET
Copyright © Intersil Americas Inc. 2001, 2004. All Rights Reserved
COMP
GND
RT
SS
FB
1
2
3
4
5
6
7
DS(ON)
TOP VIEW
ISL6525
(SOIC)
14
13
12
11
10
9
8
DELAY
LGATE
PGND
BOOT
UGATE
PHASE
VCC
ISL6525
FN4998.3

Related parts for ISL6525CBZ

ISL6525CBZ Summary of contents

Page 1

... PART NUMBER RANGE ( C) PACKAGE ISL6525CB SOIC ISL6525CBZ SOIC (See Note) (Pb-free) *Add “-T” suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Typical Application SS RT REF FB Block Diagram OCSET REFERENCE FB COMP RT 2 ISL6525 12V VCC OCSET MONITOR AND PROTECTION BOOT OSC UGATE PHASE ISL6525 PVCC +12V LGATE - + + PGND - COMP GND POWER-ON 110% RESET (POR) ...

Page 3

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

Page 4

Typical Performance Curves R PULLUP T 1000 TO +12V 100 R PULLDOWN 100 SWITCHING FREQUENCY (kHz) FIGURE 1. R RESISTANCE vs FREQUENCY T Functional Pin Descriptions RT (Pin 1) This pin provides oscillator switching ...

Page 5

PGOOD signal, not the falling edge. An internal hysteresis guarantees glitch-free transition of PGOOD. Refer to Programming PGOOD Delay Time section for more information. Functional Description Initialization The ISL6525 automatically initializes upon receipt of power. Special sequencing of the input ...

Page 6

The minimum I from the specification table. OCSET > 3. Determine I for I I PEAK PEAK OUT MAX where ∆I is the output inductor ripple current. For an equation for the ripple current see the section under component ...

Page 7

Feedback Compensation Figure 7 highlights the voltage-mode control loop for a synchronous-rectified buck converter. The output voltage ( regulated to the Reference voltage level. The error OUT amplifier (Error Amp) output ( compared with the E/A ...

Page 8

Use only specialized low-ESR capacitors intended for switching-regulator applications for the bulk capacitors. The bulk capacitor’s ESR will determine the output ripple voltage and the initial voltage drop after a high slew-rate transient. An aluminum electrolytic capacitor’s ESR value is ...

Page 9

These equations assume linear voltage-current transitions and do not adequately model power loss due the reverse- recovery of the lower MOSFETs body diode. The gate-charge losses are dissipated by the ISL6525 and don't heat the MOSFETs. However, large gate-charge increases ...

Page 10

... C16 1K SPARE Component Selection Notes: CIN - 330µF 25W VDC, Rubycon ZA series or equivalent COUT - 1000µF 6.3W VDC, Rubycon ZA series or equivalent L1 - Core: Micrometals T44-52; Winding: 12 Turns of 19AWG Q1 - Intersil MOSFET; HUF76121D Q2 - Intersil MOSFET; HUF76129D 10 ISL6525 V OUT C DELAY 1000pF VCC PGOOD DELAY ...

Page 11

... 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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