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ISL8510EVAL1Z
1A Buck Regulator with Integrated MOSFETs
The ISL8510 is a high-performance, triple output controller
that provides a single, high frequency power solution for a
variety of point of load applications. The ISL8510 integrates
a 1A standard buck PWM controller and switching MOSFET
with one 500mA LDO.
The PWM controller in the ISL8510 drives an internal
switching N-Channel power MOSFET and requires an
external Schottky diode to generate an output voltage from
0.6V to 20V. The integrated power switch is optimized for
excellent thermal performance up to 1A of output current.
The standard buck input voltage range supports a fixed 5V
or variable 6V to 25V range. The PWM regulator switches at
a fixed frequency of 500kHz and utilizes simple voltage
mode control with input voltage feed forward to provide
flexibility in component selection and minimize solution size.
Protection features include overcurrent, undervoltage, and
thermal overload protection integrated into the IC. The
ISL8510 power good signal output indicates loss of
regulation on the PWM output.
The ISL8510 features adjustable LDO regulator using
internal PMOS transistors as pass devices. Enable pin
(EN_LDO) control LDO output. A single power good signal
output indicates loss of regulation on the LDO output.
Independent overcurrent and thermal fault shutdown monitor
are integrated into the LDO section.
ISL8510 is available in a small 4mmx4mm thin Quad Flat
No-Lead (QFN) package.
Features
• Standard Buck Controller with Integrated Switching Power
MOSFET + 1 LDO
• Integrated Boot Diode
• Input Voltage Range
- Fixed 5V ±10%
- Variable 6V to 25V
• PWM Output Voltage Adjustable from 0.6V to 20V with
Continuous Output Current up to 1A
• Voltage Mode Control with Voltage Feed Forward
• Fixed 500kHz Switching Frequency
• Externally Adjustable Soft-Start Time
• Output Undervoltage Protection
• LDO Adjustable Options
- LDO1, 0.6V to 4.2V . . . . . . . . . . . . . . . . . . . . . . 500mA
• Individual Enable Inputs
• Two PGOOD Outputs (PWM and LDO)
• Overcurrent Protection
• Thermal Overload Protection
• Internal 5V LDO regulator
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• General Purpose
• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-
Compact Flash Cards
• Hand-Held Instruments
Pinout
ISL8510
(24 LD QFN)
TOP VIEW
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(°C) PACKAGE
PKG.
DWG. #
ISL8510IRZ* 85 10IRZ -40 to +85 24 Ld QFN 4x4
(2.7 Sq. mm Pad)
L24.4x4D
*Add “-T” suffix for tape and reel
NOTE: Intersil Pb-free plus anneal 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.
CC1
PG_PWM
FB_PWM
COMP
SS
EN
CC2
PG_LDO
EN_LDO2
EN_LDO1
GND
VCC
FB_LDO1
VOUT1
VIN_LDO2
VIN_LDO1
VOUT2
FB_LDO2
VIN
VIN
PHASE
PHASE
BOOT
PVCC
1
2
3
4
5
6
18
17
16
15
14
13
24 23 22 21 20 19
789101112
GND
25
July 10 , 2007 AN1332.0Application Note
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
