ISL6416
Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit
Typical Diagram
Key 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
- <30µVRMS (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)
Description
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 30µVRMS (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.
Applications
- WLAN Cards
- PCMCIA, Cardbus32, MiniPCI Cards
- Compact Flash Cards
- Hand-Held Instruments
