ISL6416 Datasheet, PDF (1/3 Pages) Intersil Corporation – Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit

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Data Sheet
November 3, 2004
ISL6416
FN9193.0
Triple Output, Low-Noise LDO Regulator
with Integrated Reset Circuit
The ISL6416 is an ultra low noise triple output LDO regulator
with microprocessor reset circuit and is optimized for
powering wireless chip sets. The IC accepts an input voltage
range of 3.0V to 3.6V and provides three regulated output
voltages: 1.8V (LDO1), 2.8V (LDO2), and another ultra-clean
2.8V (LDO3). On chip logic provides sequencing between
LDO1 and LDO2 for the BBP/MAC and the I/O supply
voltage outputs. LDO3 features ultra low noise that does not
exceed 30µV_RMS (typical) to aid VCO stability. High
integration makes the ISL6416 an ideal choice to power
many of today’s small form factor industry standard wireless
cards such as PCMCIA, mini-PCI and Cardbus-32.
The ISL6416 uses an internal PMOS transistor as the pass
device. The ISL6416 also integrates a reset function, which
eliminates the need for the additional reset IC required in
WLAN applications. The IC asserts a RESET signal
whenever the VIN supply voltage drops below a preset
threshold, keeping it asserted for at least 25ms after Vin has
risen above the reset threshold. FAULT indicates the loss of
regulation on LDO1.
Ordering Information
TEMP.
PART NUMBER RANGE (°C) PACKAGE
PKG.
DWG. #
ISL6416IA
-40 to +85 16 Ld QSOP M16.15A
ISL6416IAZ (Note 1) -40 to +85 16 Ld QSOP M16.15A
(Pb-free)
NOTES:
1. Tape and Reel available. Add “-T” suffix for Tape and Reel
Packing Option.
2. Intersil Pb-free 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-020C.
Features
• Three LDOs and a RESET circuit
• High Output Current
- LDO1, 1.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330mA
- LDO2, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225mA
- LDO3, 2.8V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125mA
• Low Output Voltage Noise
- <30µV_RMS (typical) for LDO3 (VCO Supply)
• Stable with Small Ceramic Output Capacitors
• Extensive Protection and Monitoring Features
- Overcurrent protection
- Short circuit protection
- Thermal shutdown
- FAULT indicator
• Logic-Controlled Shutdown Pin
• Integrated Microprocessor Reset Circuit
- Programmable Reset Delay
• Proven Reference Design for a Total WLAN System
Solution
• Pb-Free Available (RoHS Compliant)
Applications
• WLAN Cards
- PCMCIA, Cardbus32, MiniPCI Cards
- Compact Flash Cards
• Hand-Held Instruments
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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