ISL8009AIRZ-TK Intersil, ISL8009AIRZ-TK Datasheet

IC REG SYNC BUCK 1.5A 8-DFN

ISL8009AIRZ-TK

Manufacturer Part Number
ISL8009AIRZ-TK
Description
IC REG SYNC BUCK 1.5A 8-DFN
Manufacturer
Intersil
Type
Step-Down (Buck)r
Datasheet

Specifications of ISL8009AIRZ-TK

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.8 ~ 5.5 V
Current - Output
1.5A
Frequency - Switching
1.6MHz
Voltage - Input
2.7 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ISL8009AIRZ-TK
Manufacturer:
RENESAS
Quantity:
2 000
1.5A Low Quiescent Current 1.6MHz High
Efficiency Synchronous Buck Regulator
ISL8009A
The ISL8009A is a high efficiency, monolithic,
synchronous step-down DC/DC regulator that can deliver
up to 1.5A continuous output current. It is optimized for
generating low output voltages down to 0.8V. The supply
voltage range of 2.7V to 5.5V, allows the use of single
Li+cell, three NiMH cells or a regulated 5V input. The
ISL8009A uses current mode control architecture to
deliver very low duty cycle operation at high frequency
with fast transient response and excellent loop stability.
It has flexible operation mode selection of forced PWM
mode and automatic PFM/PWM with as low as 17µA
quiescent current, achieving high power conversion
efficiency under light load condition, hence maximizing
battery life. High 1.6MHz pulse-width modulation (PWM)
switching frequency allows the use of small external
components.
The ISL8009A integrates a pair of low ON-resistance
P-Channel and N-Channel internal MOSFETs to maximize
efficiency and minimize external component count. The
100% duty-cycle operation allows less than 400mV
dropout voltage at 1.5A output current.
The ISL8009A offers a 2ms Power-On-Reset (POR) timer
at power-up. The timer output can be reset by RSI.
When shutdown, ISL8009A discharges the output
capacitor through a 100Ω resistor. Other features include
internal digital soft-start, enable for power sequence,
overcurrent protection, and thermal shutdown.
The ISL8009A is offered in a 2mmx3mm 8 Ld DFN
package with 1mm maximum height. The complete
converter occupies less than 1cm
November 19, 2009
FN6656.2
1
2
area.
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• High Efficiency Synchronous Buck Regulator with up
• 2ms Reset Timer
• 2.7V to 5.5V Supply Voltage
• 3% Output Accuracy Over-Temperature/Load/Line
• 1.5A Guaranteed Output Current
• 17µA Quiescent Supply Current in PFM Mode
• Selectable Forced PWM Mode and PFM Mode
• Less Than 1µA Logic Controlled Shutdown Current
• 90% Maximum Duty Cycle for Lowest Dropout at
• Internal Current Mode Compensation
• Internal Digital Soft-Start
• Peak Current Limiting, Short Circuit Protection
• Over-Temperature Protection
• Enable
• Soft Discharge Disable
• Small 8 Ld 2mmx3mm DFN
• Pb-Free (RoHS Compliant)
Applications
• DC/DC POL Modules
• µC/µP, FPGA and DSP Power
• Plug-in DC/DC Modules for Routers and Switchers
• Portable Instruments
• Test and Measurement Systems
Pin Configuration
to 95% Efficiency
1.5A
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. 2008, 2009. All Rights Reserved
*EXPOSED PAD MUST BE CONNECTED
SKIP
POR
VIN
EN
1
2
3
4
TO THE GND PIN*
(8 LD DFN)
ISL8009A
TOP VIEW
8
7
6
5
LX
GND
VFB
RSI

ISL8009AIRZ-TK 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. 2008, 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL8009A ...

Page 2

... Ordering Information PART NUMBER (Notes ISL8009AIRZ-T 09A NOTES: 1. 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) ...

Page 3

... Soft-Discharge Resistor 3 ISL8009A Thermal Information (Reference to GND) Thermal Resistance (Typical 2x3 DFN (Notes Junction Temperature Range . . . . . . . . . . -55°C to +125°C Storage Temperature Range . . . . . . . . . . . -65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = 5V 2.2µ SYMBOL TEST CONDITIONS V Rising UVLO Falling ...

Page 4

Electrical Specifications Typical specifications are measured at the following conditions: T RSI = SKIP = 0V, V Applications” on page 9. (Continued) PARAMETER POR Output Low Voltage Delay Time POR Pin Leakage Current Minimum Supply Voltage for Valid POR Signal ...

Page 5

Typical Operating Performance 100 1.5V - PWM OUT 60 1.8V - PWM OUT 50 1.2V - PWM OUT 0.00 0.25 0.50 0.75 OUTPUT LOAD (A) FIGURE 1. EFFICIENCY vs LOAD, V 100 ...

Page 6

Typical Operating Performance 1.84 1.83 5.5V 5.5V - PWM 1.82 IN 2.7V - PWM 1.81 IN 1.80 1.79 1.78 2.7V - PFM 4V - PWM IN 1.77 IN 1.76 0.00 0.25 0.50 0.75 OUTPUT LOAD (A) FIGURE 7. V REGULATION ...

Page 7

Typical Operating Performance 2.0 NO LOAD 1.5 1.0 0.75A LOAD 1.5A LOAD 0.5 0.0 -0.5 2.0 2.5 3.0 3.5 4.0 INPUT VOLTAGE (V) FIGURE 13. OUTPUT VOLTAGE REGULATION vs V SKIP MODE I 0.2A/DIV L FIGURE 15. STEADY STATE OPERATION ...

Page 8

Typical Operating Performance EN 2V/DIV V 1V/DIV I 1A/DIV L POR 2V/DIV FIGURE 19. SOFT-START AT NO LOAD, 500µs/DIV EN 2V/DIV V OUT 0.5V/DIV FIGURE 21. SOFT-START AT FULL LOAD, 500µs/DIV FIGURE 23. OUTPUT SHORT CIRCUIT RECOVERY, 500µs/DIV 8 ISL8009A ...

Page 9

Typical Applications INPUT 2. 20µ 100k Block Diagram SOFT- START SHUTDOWN EN 0.8V BANDGAP + EAMP VFB 0.864V + + 0.736V POR 2ms DELAY RSI 0.2V 9 ISL8009A VIN LX GND ISL8009A EN POR ...

Page 10

Theory of Operation The ISL8009A is a step-down switching regulator optimized for battery-powered handheld applications. The regulator operates at 1.6MHz fixed switching frequency under heavy load condition to allow small external inductor and capacitors to be used for minimal printed-circuit ...

Page 11

Once the skip mode is entered, the pulse modulation starts being controlled by the SKIP comparator shown in Figure 25. Each pulse cycle is still synchronized by the PWM clock. The P-MOSFET is turned on at the clock and turned ...

Page 12

Applications Information Output Inductor and Capacitor Selection To consider steady state and transient operation, ISL8009A typically uses a 3.3µH output inductor. Higher or lower inductor values can be used to optimize the total converter system performance. For example, for higher ...

Page 13

... 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

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