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RT9287 用于OLED升压双LDO的电源转换器 (含应用

2009-11-20 00:00:00

RT9287 用于OLED升压双LDO的电源转换器 (含应用电路)

The RT9287 integrates a boost converter for OLED power and a Dual LDO for camera image sensor power. To achieve high efficiency, the boost converter optimizes its operating frequency for small LC filters value and reduces the operating current. Moreover, the internal soft-start function reduces the inrush current.
For the Dual LDO part, it possesses functions of 2% accuracy, dual channel, low dropout voltage (240mV@300mA), low noise, low ground current and low dropout regulator sourcing up to 300mA at each channel. For battery-powered devices, it provides near zero shutdown current. Moreover, it also integrates functions such as current limiting, over temperature, output short circuit, 27uA low ground current per LDO and short circuit thermal folded back protection. When output short circuit occurs, the RT9287 reduces its over temperature protection trip point to provide maximum safety to users. The RT9287 is available in WDFN-10L 3x3 package.

Ordering Info

Note :
Richtek Pb-free and Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

Features

• Boost Converter
► VIN Operating Range : 2.7V to 5.5V
► Maximum Output Voltage Up to 20V
► Output Current up to 100mA at VOUT = 12V.
► Low Shutdown Supply Current
► Minimize the External Component
► Small LC Filter
► Internal Soft Start
• Dual LDO
► Wide Operating Voltage Ranges : 2.7V to 5.5V
► Low-Noise for RF Application
► No Noise Bypass Capacitor Required
► Fast Response in Line/Load Transient
► TTL-Logic-Controlled Shutdown Input
► Low Temperature Coefficient
► Dual LDO Outputs (300mA/300mA)
► Ultra-low Quiescent Current 27uA/LDO
► High Output Accuracy 2%
► Short Circuit Protection
► Thermal Shutdown Protection
► Current Limit Protection
► Short Circuit Thermal Folded Back Protection
• RoHS Compliant and 100% Lead (Pb)-Free