CX8507 5V 4.2A Car Charger IC
General Description
The CX8507 is a single‐phase, constant‐on‐time, synchronous PWM controller, which drives N‐channel MOSFETs. The CX8507 steps down high voltage to generate low‐voltage chipset or RAM supplies in notebook computers. The CX8507 provides excellent transient response andaccurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the provides very high efficiency over light to heavy loads with loading‐ modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low‐noise requirements.
Features
􀁺 Adjustable Output Voltage from +0.7V to +5.5V
􀁺 0.7V Reference Voltage
􀁺 ±1% Accuracy Over‐Temperature
􀁺 Operates from an Input Battery Voltage Range of +1.8V to +32V
􀁺 Power‐On‐Reset Monitoring on VCC Pin
􀁺 Excellent Line and Load Transient Responses
􀁺 PFM Mode for Increased Light Load Efficiency
􀁺 Selectable PWM Frequency from 4 Preset Values
􀁺 Integrated MOSFET Drivers
􀁺 TDFN� 3x3 Package
Applications
􀁺 Notebook
􀁺 Table PC
􀁺 Hand‐Held Portable
􀁺 AIO PC
􀁺 LCD Monitor / TV
􀁺 Battery Charger
􀁺 ADSL Modem
􀁺 Telecom / Networking Equipment |
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