ISL8510IRZ Intersil, ISL8510IRZ Datasheet

IC PWM CTRLR DUAL BUCK 24-QFN

ISL8510IRZ

Manufacturer Part Number
ISL8510IRZ
Description
IC PWM CTRLR DUAL BUCK 24-QFN
Manufacturer
Intersil
Type
Step-Down (Buck)r
Datasheet

Specifications of ISL8510IRZ

Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
2
Voltage - Output
0.6 ~ 20 V
Current - Output
1A
Frequency - Switching
500kHz
Voltage - Input
5V, 5.5 ~ 25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-VQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL8510IRZ-T
Manufacturer:
INTERSIL
Quantity:
20 000
Dual Output Controller with 1A Standard
Buck PWM and LDO
The ISL8510 is a high-performance, dual 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 5.5V 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 one adjustable LDO regulator using
internal PMOS transistors as pass devices. The enable pin
(EN_LDO) controls the LDO output. A single power-good
signal output indicates loss of regulation on the LDO output.
Independent overcurrent and thermal fault shutdown monitors
are integrated into the “LDO Regulator Capacitor Selection”
on page 16.
The ISL8510 is available in a small 4mmx4mm Quad Flat No
Lead (QFN) package.
®
1
Data Sheet
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Standard Buck Controller with Integrated Switching Power
• Integrated Boot Diode
• Input Voltage Range
• PWM Output Voltage Adjustable from 0.6V to 20V with
• Voltage Mode Control with Voltage Feed Forward
• Fixed 500kHz Switching Frequency
• Externally Adjustable Soft-Start Time
• Output Undervoltage Protection
• LDO Adjustable Options
• Individual Enable Inputs
• Two PGOOD Outputs (PWM and LDO)
• Overcurrent Protection
• Thermal Overload Protection
• Internal 5V LDO regulator
• Pb-Free (RoHS Compliant)
Applications
• General Purpose
• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-
• Hand-Held Instruments
December 15, 2008
MOSFET + 1 LDO
- Fixed 5V ±10%
- Variable 5.5V to 25V
Continuous Output Current up to 1A
- LDO, 0.6V to 4.2V . . . . . . . . . . . . . . . . . . . . . . . 500mA
Compact Flash Cards
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved
ISL8510
FN6516.2

Related parts for ISL8510IRZ

ISL8510IRZ Summary of contents

Page 1

... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ...

Page 2

... ISL8510 Ordering Information PART NUMBER (Note) ISL8510IRZ* 85 10IRZ *Add “-T” suffix for tape and reel. Please refer to TB347 for details reel specifications. 18 VIN NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach 17 VIN materials, and 100% matte tin plate plus anneal (e3 termination ...

Page 3

Typical Application Schematics R5 5.11k FB_LDO R6 5.11k LDO 1.2V VOUT C6 22µF VIN_LDO VOUT1 C7 10µF 3 ISL8510 R2 2.21k C4 C5 0.1µF 0.033µF ISL8510 C14 1µF FIGURE 1. V RANGE FROM 4. 301 ...

Page 4

Typical Application Schematics 0.1 µ 5.11k FB_LDO LDO R6 5.11k VOUT 1. µ F VIN_LDO VOUT C7 10 µ ISL8510 (Continued) R2 2.21k C4 C5 0.033 µ F ISL8510 C14 1 µ F FIGURE ...

Page 5

Functional Block Diagram VCC SOFT-START CONTROL 30µA SS EN_PWM EN_LDO VIN LDO VCC PG_PWM PG_LDO GND 5 ISL8510 VOLTAGE - + MONITOR EA 0.6V RAMP REFERENCE GENERATOR FAULT THERMAL MONITOR MONITOR OSCILLATOR +150°C OC MONITOR PVCC POWER-ON RESET VIN_LDO MONITOR ...

Page 6

... Maximum Junction Temperature (Plastic Package +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Ambient Temperature Range .-40°C to +85°C Junction Temperature Range .-40°C to +125°C Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . See Link Below http://www.intersil.com/pbfree/Pb-FreeReflow.asp SYMBOL TEST CONDITIONS VIN VIN connected to VCC ...

Page 7

Electrical Specifications Unless Otherwise Noted, Typical Specifications are Measured at the Following Conditions 25V. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. IN Temperature limits established by characterization and ...

Page 8

Pin Descriptions FB_LDO 1 VOUT 2 VIN_LDO 3 25 GND GND 4 GND VIN The input supply for the PWM regulator power stage and the source for ...

Page 9

Typical Performance Curves 100 1.8V 60 OUT 2.5V OUT 50 1.5V OUT 40 1.2V OUT 0.00 0.25 0.50 0.75 OUTPUT LOAD (A) FIGURE 3. EFFICIENCY vs LOAD 3.3V ...

Page 10

Typical Performance Curves 2.503 2.502 2.501 12V IN 2.500 0.00 0.25 0.50 0.75 OUTPUT LOAD (A) FIGURE 9. V REGULATION vs LOAD, 500kHz 2.5V OUT 5.015 5.014 5.013 7V IN 5.012 5.011 5.010 5.009 5.008 12V IN 5.007 25V 5.006 ...

Page 11

Typical Performance Curves 5.1 5.0 4.9 4.8 4.7 4.6 4.5 4 100 I V (mA) CC FIGURE 15. V LOAD REGULATION CC LX 5V/DIV V RIPPLE OUT 20mV/DIV IL 0.2A/DIV LDO RIPPLE 20mV/DIV FIGURE 18. STEADY STATE OPERATION ...

Page 12

Typical Performance Curves LX 5V/DIV V RIPPLE OUT 100mV/DIV IL 1A/DIV LDO RIPPLE 20mV/DIV FIGURE 20. LOAD TRANSIENT, 200µs/DIV EN 5V/DIV IL 1A/DIV PG_PWM 2V/DIV SS 2V/DIV FIGURE 22. SOFT-START AT FULL LOAD, 500µs/DIV EN 5V/DIV IL 1A/DIV PG_PWM 5V/DIV ...

Page 13

Typical Performance Curves IL 1A/DIV FIGURE 26. OUTPUT SHORT CIRCUIT, 5µs/DIV FIGURE 28. LDO SHORT CIRCUIT AND RECOVERY, 200µs/DIV 13 ISL8510 Circuit of Figure 12V, VIN_LDO = -40°C to +85°C, unless otherwise noted. ...

Page 14

Detailed Description The ISL8510 combines a standard buck PWM controller with an integrated switching MOSFET and one low dropout (LDO) linear regulators with internal pass devices. The buck controller drives an internal N-Channel MOSFET and requires an external diode to ...

Page 15

This linear ramp is applied to the non-inverting input of the internal error amplifier and overrides the nominal 0.6V reference. The output voltage reaches its regulation ...

Page 16

LDO Current Limit The ISL8510 monitors and controls the pass transistor’s gate voltage to limit output current. The current limit for LDO is 700mA typical. The output can be shorted to ground without damaging the part due to the current ...

Page 17

ESR of 50mΩ or less to insure stability and optimum transient response. For stable operation, a ceramic capacitor, with a minimum value of 10µF, is recommended for LDO output. There is no upper limit to the output capacitor ...

Page 18

MOSFET turns on. Place the small ceramic capacitors physically close to the MOSFET VIN pins (switching MOSFET drain) and the Schottky diode anode. The important parameters for the bulk input capacitance ...

Page 19

... A more detailed explanation of voltage mode control of a buck regulator can be found in Tech Brief TB417, entitled “Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators.” http://www.intersil.com/data/tb/tb417.pdf Layout Considerations Layout is very important in high frequency switching converter design. With power devices switching efficiently at ...

Page 20

... 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 ...

Page 21

Package Outline Drawing L24.4x4D 24 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 10/06 4.00 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 21 ISL8510 ...

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