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8502A PDF даташит

Спецификация 8502A изготовлена ​​​​«Intersil Corporation» и имеет функцию, называемую « ISL8502A».

Детали детали

Номер произв 8502A
Описание ISL8502A
Производители Intersil Corporation
логотип Intersil Corporation логотип 

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8502A Даташит, Описание, Даташиты
2A Synchronous Buck Regulator with Integrated
MOSFETs
ISL8502A
The ISL8502A is a synchronous buck controller with internal
MOSFETs packaged in a small 4mmx4mm QFN package. The
ISL8502A can support a continuous load of 2A and has a very
wide input voltage range. With the switching MOSFETs
integrated into the IC, the complete regulator footprint can be
very small and provide a much more efficient solution than a
linear regulator.
The ISL8502A is capable of stand-alone operation or it can be
used in a master slave combination for multiple outputs that
are derived from the same input rail. Multiple slave channels
(up to six) can be synchronized. This method minimizes the
EMI and beat frequencies effect with multi-channel operation.
The switching PWM controller drives two internal N-Channel
MOSFETs in a synchronous-rectified buck converter topology.
The synchronous buck converter uses voltage-mode control
with fast transient response. The switching regulator provides
a maximum static regulation tolerance of ±1% over line, load,
and temperature ranges. The output is user-adjustable by
means of external resistors down to 0.6V.
The output is monitored for undervoltage events. The switching
regulator also has overcurrent protection. Thermal shutdown is
integrated. The ISL8502A features a bi-directional Enable pin
that allows the part to pull the enable pin low during fault
detection.
PGOOD delay for ISL8502A has been decreased to 1ms typical
(at 500kHz switching frequency) compared to 250ms (at
500kHz) for ISL8502.
Features
• Up to 2A Continuous Output Current
• Integrated MOSFETs for Small Regulator Footprint
• Adjustable Switching Frequency, 500kHz to 1.2MHz
• Tight Output Voltage Regulation, ±1% Over-temperature
• Wide Input Voltage Range, 5V ±10% or 5.5V to 14V
• Wide Output Voltage Range, from 0.6V
• Simple Single-Loop Voltage-Mode PWM Control Design
• Input Voltage Feed-Forward for Constant Modulator Gain
• Fast PWM Converter Transient Response
• Lossless rDS(ON) High Side and Low Side Overcurrent
Protections
• Undervoltage Detection
• Integrated Thermal Shutdown Protection
• Power-Good Indication
• Adjustable Soft-Start
• Start-Up with Pre-Bias Output
• Pb-free (RoHS Compliant)
Applications
www.DataSheet.co.kr
Point of Load Applications
Graphics Cards - GPU and Memory Supplies
• ASIC Power Supplies
• Embedded Processor and I/O Supplies
• DSP Supplies
POWER GOOD
ENABLE
PGOOD
EN
VIN
+
VIN
5.5V TO 14V
POWER GOOD
ENABLE
SYNCH
M/S
BOOT
VCC
PVCC
SS
ISL8502A
PHASE
VOUT
+
PGND
FS
FB
SGND
COMP
PGOOD
EN
PVCC
VCC
SS
SYNCH
M/S
FS
SGND
VIN
BOOT
ISL8502A
PHASE
PGND
FB
COMP
4.5V TO 5.5VVIN
+
VOUT
+
FIGURE 1. STAND-ALONE REGULATOR: VIN 5.5V TO 14V
FIGURE 2. STAND-ALONE REGULATOR: VIN 4.5V TO 5.5V
October 21, 2011
FN7940.0
1
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. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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8502A Даташит, Описание, Даташиты
Block Diagram
PVCC
VIN
SERIES
REGULATOR
POR
MONITOR
SGND
VCC
PVCC
30μA
BIAS
EN FAULT MONITORING
SS PGOOD
OC
MONITOR
PVCC
VIN (x4)
BOOT
SYNCH
M/S
FS
CLOCK
AND
OSCILLATOR
GENERATOR
VOLTAGE
MONITOR
0.6V
REFERENCE
GATE
DRIVE
AND
ADAPTIVE
SHOOT THRU
PROTECTION
OC
MONITOR
PHASE (x4)
FB COMP
PGND (x4)









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8502A Даташит, Описание, Даташиты
Pin Configuration*
ISL8502A
ISL8502A
(24 LD QFN)
TOP VIEW
24 23 22 21 20 19
PGOOD 1
18 VIN
SGND 2
17 PHASE
EN 3
SYNCH 4
GND
25
16 PHASE
15 PHASE
M/S 5
14 PHASE
FS 6
13 PGND
7 8 9 10 11 12
*See “Functional Pin Descriptions” beginning on page 13 for pin descriptions.
Ordering Information
PART
NUMBER
(Note 2)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG. DWG. #
ISL8502AIRZ (Notes 1, 3)
85 02AIRZ
-40 to +85
24 Ld 4x4 QFN
L24.4x4D
ISL8502AEVAL1Z
Evaluation Board
www.DataSheet.co.kr
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL8502A. For more information on MSL please see
Tech Brief TB363.
3 FN7940.0
October 21, 2011
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Номер в каталогеОписаниеПроизводители
8502A ISL8502AIntersil Corporation
Intersil Corporation

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