RT8058

Features:

·0.6V Reference Allows Low Output Voltage
·Low Dropout Operation : 100%Duty Cycle
·2A Load Current
·< 2uAShutdown Current
·Up to 95%Efficiency
·No Schottky Diode Required
·1MHZ Constant Switching Frequency
·Low RDS(ON) Internal Switches
·Internally Compensated
·Internal Soft-Start
·Over temperature Protection
·Short Circuit Protection
·Small 16-Lead WQFN Package
·RoHS Compliant and 100%Lead (Pb)-Free




Application

·Portable Instruments
·Microprocessors andDSP Core supplies
·Cellular Telephones
·Wireless andDSLModems
·Digital Cameras
·PC Cards




Pinout








Specifications

l Supply Input Voltage V_DD, PV_DD --------------------------------------------------------- -0.3V to 6V
l LX Pin Switch Voltage ---------------------------------------------------------------------- -0.3V to 6V
l Other I/O Pin Voltage ---------------------------------------------------------------------- -0.3V to 6V
l Power Dissipation, PD@ T_A = 25°C
WQFN-6L3x3 ------------------------------------------------------ ------------------------------- 1.471W
l Package Thermal Resistance (Note 4)
WQFN-16L 3x3, q_JA ----------------------------------------------------------------------------- 68°C/W
WQFN-16L 3x3, q_JC ------------------------------------------------------------------------------- 7°C/W
l Lead Temperature (Soldering, 10 sec.)-------------------------------------------------------- 260°C
l Storage Temperature Range ------------------------------------------------------- -65°C to 150°C
l Junction Temperature ---------------------------------------- ---------------------------------- 150°C
l ESD Susceptibility (Note 2)
HBM(Human Body Mode) ------------------------------------------------------------------------------- 2kV
MM(MachineMode) ------------------------------------------------------------------------------------- 200V




Description

The RT8058 is a current mode PWM step-down converter. The chip is ideal for fixed frequency and low ripple applications over full range of load conditions. Its input voltage range is from 2.6V to 5.5V with a constant 1MHz switching frequency that allows it to adopt tiny, low cost capacitors and inductors with 2mm or less in height making it ideal for single-cell Li-lon/polymer battery applications. The low on resistance internal MOSFET can achieve high efficiency without the need of external schottky diodes in wide operating ranges and the output voltage is adjustable from 0.6V to 5V that can provide up to 2A load current. The RT8058 operates at 100% duty cycle for low dropout operation that extends battery life in portable devices.
The RT8058 is available in a WQFN-16L 3x3 package.

The RT8058 is a currentmodePWMstep-down converter.

The chip is ideal for fixed frequency and low ripple applications over full range of load conditions. Its input voltage range is from 2.6V to 5.5V with a constant 1MHz switching frequency that allows it to adopt tiny, low cost capacitors and inductorswith 2mm or less in heightmaking it ideal for single-cell Li-lon/polymer battery applications.

The lowon resistance internalMOSFET can achieve high efficiency without the need of external schottky diodes in wide operating ranges and the output voltage is adjustable from 0.6V to 5V that can provide up to 2A load current.

The RT8058 operates at 100%duty cycle for low dropout operation that extends battery life in portable devices.

The RT8058 is available in aWQFN-16L 3x3 package.