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The LY9899 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit. With an internal low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current. The LY9899 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.
Features
Low voltage operation: Start-up is guaranteed from 0.9 V(louτ=1 mA)
Duty ratio: Built-in PWM/PFM switching control circuit 15 to 78 %.
oscillator frequency: 1 .0MHz
Output voltage range: 1.5V ~6.5 V
Output voltage accuracy: +2%
Soft start function: 2 mS.
PACKAGE: SOT23-5 SOT89-5 SOP-8
Typical Application
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
The LY9899 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit. With an internal low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current. The LY9899 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.
Features
Low voltage operation: Start-up is guaranteed from 0.9 V(louτ=1 mA)
Duty ratio: Built-in PWM/PFM switching control circuit 15 to 78 %.
oscillator frequency: 1 .0MHz
Output voltage range: 1.5V ~6.5 V
Output voltage accuracy: +2%
Soft start function: 2 mS.
PACKAGE: SOT23-5 SOT89-5 SOP-8
Typical Application
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
DC/DC升压IC
DC/DC升压IC
DC/DC升压IC DC/DC升压IC
LY9899
LY
SOT23-5 SOP-8
全新原装
0.9-5.5V