Description:The ISL9111 and ISL9111A provide a power supply solution for single-cell, dual-cell, or three-cell alkaline, NiCd or NiMH battery-powered applications. The device has a typical 0.8V start-up voltage and is capable of supplying up to 5.25V output voltage. Both devices are guaranteed to supply 100mA from a single-cell input and 240mA from a dual-cell input when output is 3.3V. High 1.2MHz switching frequency allows for the use of tiny, low-profile inductors and ceramic capacitors to minimize the size of the s
The ISL9111EHADJZ-T can handle a maximum input voltage of 15V, but it's recommended to operate within the specified input voltage range of 2.7V to 5.5V for optimal performance and reliability.
To minimize EMI and noise, it's recommended to follow a star-ground configuration, keep the input and output capacitors close to the device, and use a solid ground plane. Additionally, avoid routing high-frequency signals near the device and use shielding if possible.
The recommended output capacitor value is 10uF to 22uF, and it's recommended to use a low-ESR ceramic capacitor such as X5R or X7R. The output capacitor should be placed as close to the output pin as possible to minimize noise and improve stability.
The ISL9111EHADJZ-T has a fixed output voltage of 1.2V, but it can be adjusted using an external resistor divider network. The output voltage can be calculated using the formula: VOUT = 1.2V x (R1 + R2) / R2, where R1 and R2 are the resistors in the divider network.
The thermal derating for the ISL9111EHADJZ-T is 12.5mW/°C, and the maximum ambient temperature can be calculated using the formula: TAmax = TJmax - (PD x θJA), where TJmax is the maximum junction temperature (150°C), PD is the power dissipation, and θJA is the junction-to-ambient thermal resistance (45°C/W).
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ISL9111EHADJZ-T Overview
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