ISL9107 Datasheet, PDF (1/12 Pages) Intersil Corporation – 1.5A 1.6MHz Low Quiescent Current High Efficiency Synchronous Buck Regulator

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Data Sheet
ISL9107, ISL9108
December 21, 2007
FN6612.0
1.5A 1.6MHz Low Quiescent Current High
Efficiency Synchronous Buck Regulator
ISL9107 and ISL9108 are 1.6MHz synchronous step-down
regulators with integrated power switches capable of
delivering 1.5A output current, which is ideal for powering
low-voltage microprocessors in compact devices such as
PDAs and cellular phones. These devices are optimized for
generating low output voltages down to 0.8V. The supply
voltage range is from 2.7V to 5.5V allowing for the use of a
single Li+ cell, three NiMH cells or a regulated 5V input.
1.6MHz pulse-width modulation (PWM) switching frequency
allows using small external components. They have flexible
operation mode selection of forced PWM mode and Skip
(Low I_Q) mode with typical 17μA quiescent current for
highest light load efficiency to maximize battery life.
The ISL9107 and ISL9108 integrate a pair of low
ON-resistance P-Channel and N-Channel MOSFETs to
maximize efficiency and minimize external component
count.
The ISL9107 offers a typical 215ms Power-Good (PG) timer
when powered up. The timer output can be reset by RSI.
When shutdown, ISL9107 and ISL9108 discharge the output
capacitor. Other features include internal digital soft-start,
enable for power sequence, overcurrent protection, and
thermal shutdown.
The ISL9107 and ISL9108 are offered in 8 Ld 2mmx3mm
DFN package with 0.9mm typical height. The complete
converter can occupy less than 1cm² area.
Ordering Information
PART
NUMBER
(Note)
TEMP.
PART RANGE
MARKING (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL9107IRZ-T 107
-40 to +85 8 Ld 2x3 DFN L8.2x3
ISL9108IRZ-T 108
-40 to +85 8 Ld 2x3 DFN L8.2x3
*Please refer to TB347 for details on reel specifications.
NOTE: 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.
Features
• Integrated Synchronous Buck Regulator with up to 95%
Efficiency
• 2.7V to 5.5V Supply Voltage
• 1.5A Guaranteed Output Current
• 17μA Quiescent Supply Current in Skip (Low I_Q) Mode
• Selectable Forced PWM Mode and Skip Mode
• Less Than 1µA Logic Controlled Shutdown Current
• 100% Maximum Duty Cycle for Lowest Dropout
• Discharge Output Capacitor when Shutdown
• Internal Digital Soft-Start
• Enable, Peak Current Limiting, Short Circuit Protection
• Over-Temperature Protection
• Power-Good Function (for ISL9107 only)
• 8 Ld 2mmx3mm DFN
• Pb-Free (RoHS Compliant)
Applications
• Single Li-Ion Battery-Powered Equipment
• DSP Core Power
• PDAs and Palmtops
Pinouts
ISL9107
(8 LD 2X3 DFN)
TOP VIEW
VIN 1
EN 2
PG 3
MODE 4
8 SW
7 GND
6 FB
5 RSI
ISL9108
(8 LD 2X3 DFN)
TOP VIEW
VIN 1
EN 2
NC 3
MODE 4
8 SW
7 GND
6 FB
5 NC
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2007. All Rights Reserved
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