EUP3420 Datasheet | Eutech Microelectronics

2A/1.5MHz, Synchronous Step-Down Converter with Soft Start DESCRIPTION The EUP3420 is a synchronous current mode step-down dc-dc converter, capable of delivering 2A load current with excellent line and load regulation. Operating with an input voltage range between 2.7V and 5.5V, the device is ideal for portable applications powered by a single Li-Ion battery cell or by 3-cell Ni MH/Ni Cd batteries. The EUP3420 operates at 1.5MHz fixed frequency PWM mode and provides very low output ripple voltage for noise sensitive applications. The internal integrated synchronous switch increases efficiency while eliminates the need for an external Schottky diode. The EUP3420 is available in the 10-pin MSOP and 10-pin TDFN package. Features High Efficiency up to 96% Up to 2A Load Current 300µA Typical Quiescent Current 1.5MHz Constant Switching Frequency 2.7V to 5.5V Input Voltage Range Adjustable Output Voltage as Low as 0.7V 100% Duty Cycle Low Dropout Operation No Schottky Diode Required Short Circuit and Thermal Protection Excellent Line and Load Transient Response ＜1µA Shutdown Current Built-In Soft-Start Available in MSOP-10 and TDFN-10 Package Ro HS pliant and 100% Lead(Pb)-Free Halogen-Free APPLICATIONS Cellular and Smart Phones Portable Media Players/ MP3 Players Digital Still and Video Cameras Portable Instruments WLAN PC Cards Typical Application Circuit Figure 1. DS3420 Ver1.4 May 2012 Pin Configurations Package Type Pin Configurations Package Type Pin Configurations MSOP-10 TDFN-10 Note: The exposed pad must be connected GND. Note: The exposed pad must be connected GND. Pin Description Name EN VIN GND FB MODE SW PGND MSOP-10 1 2,3 4 5 6 7,8 9,10 TDFN-10 1 2,3 4 5 6 7,8 9,10 DESCRIPTION Chip enable pin. Forcing this pin above 1.5V enables the part. Forcing this pin below 0.3V shuts down the device. Do not leave EN floating. Supply voltage input. Analog ground. Feedback pin. Pulling the MODE pin high allows the device to be forced into...