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ISL6522EVAL1 Datasheet

  • ISL6522EVAL1

  • Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) C...

  • 14頁

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廬
ISL6522
Data Sheet
November 2002
FN9030.3
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
microprocessor 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
鹵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/碌s slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0鈥?00%.
The ISL6522 protects against overcurrent conditions by
inhibiting PWM operation. The ISL6522 monitors the current
by using the r
DS(ON)
of the upper MOSFET which eliminates
the need for a current sensing resistor.
Features
鈥?Drives two N-Channel MOSFETs
鈥?Operates from +5V or +12V input
鈥?Simple single-loop control design
- Voltage-mode PWM control
鈥?Fast transient response
- High-bandwidth error amplifier
- Full 0鈥?00% duty ratio
鈥?Excellent output voltage regulation
- 0.8V internal reference
-
鹵1%
over line voltage and temperature
鈥?Overcurrent fault monitor
- Does not require extra current sensing element
- Uses MOSFETs r
DS(ON)
鈥?Converter can source and sink current
鈥?Small converter size
- Constant frequency operation
- 200kHz free-running oscillator programmable from
50kHz to over 1MHz
鈥?14-lead SOIC and TSSOP package and 16-lead 5x5mm
MLFP Package
鈥?MLFP 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
Pinout
TOP VIEW
SOIC
and
TSSOP
RT
OCSET
SS
COMP
FB
EN
GND
1
2
3
4
5
6
7
14 VCC
13 PVCC
12 LGATE
11 PGND
10 BOOT
9
8
UGATE
PHASE
Applications
鈥?Power supply for Pentium
廬
, Pentium Pro, PowerPC
廬
and
AlphaPC鈩?microprocessors
鈥?High-power 5V to 3.xV DC-DC regulators
鈥?Low-voltage distributed power supplies
TOP VIEW
OCSET
Ordering Information
VCC
MLFP
PART NUMBER
ISL6522CB
12
11
PVCC
TEMP.
RANGE (
o
C)
0 to 70
-40 to 85
0 to 70
-40 to 85
0 to 70
-40 to 85
PACKAGE
14 Ld SOIC
14 Ld SOIC
14 Ld TSSOP
14 Ld TSSOP
16 Ld 5x5 MLFP
16 Ld 5x5 MLFP
PKG.
NO.
M14.15
M14.15
M14.173
M14.173
L16.5x5B
L16.5x5B
NC
16
15
14
RT
13
MLFP
SS
COMP
FB
EN
1
2
GND
ISL6522IB
LGATE
ISL6522CV
PGND
BOOT
3
4
5
NC
6
GND
7
PHASE
8
UGATE
10
9
ISL6522IV
ISL6522CR
ISL6522IR
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002, All Rights Reserved
PowerPC
廬
is a trademark of IBM. AlphaPC鈩?is a trademark of Digital Equipment Corporation. Pentium
廬
is a registered trademark of Intel Corporation.
1

ISL6522EVAL1 產(chǎn)品屬性

  • 1

  • 編程器，開發(fā)系統(tǒng)

  • 評估板 - DC/DC 與 AC/DC（離線）SMPS

  • -

  • DC/DC，步降

  • -

  • -

  • -

  • -

  • 10.8 ~ 13.2 V

  • 降壓

  • -

  • 完全填充

  • 板

  • ISL6522

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